mirror of
https://git.busybox.net/busybox.git
synced 2024-11-23 21:53:25 +08:00
5e0411a7fb
Has a few annoying problems: * sleepcmd() -> sleep_main(), the parsing of bad arguments exits the shell. * sleep_for_duration() in sleep_main() has to be interruptible for ^C traps to work, which may be a problem for other users of sleep_for_duration(). * BUT, if sleep_for_duration() is interruptible, then SIGCHLD interrupts it as well (try "/bin/sleep 1 & sleep 10"). * sleep_main() must not allocate anything as ^C in ash longjmp's. (currently, allocations are only on error paths, in message printing). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2645 lines
99 KiB
C
2645 lines
99 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Busybox main internal header file
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*
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* Based in part on code from sash, Copyright (c) 1999 by David I. Bell
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* Permission has been granted to redistribute this code under GPL.
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#ifndef LIBBB_H
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#define LIBBB_H 1
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#include "platform.h"
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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <netdb.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <paths.h>
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#if defined __UCLIBC__ /* TODO: and glibc? */
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/* use inlined versions of these: */
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# define sigfillset(s) __sigfillset(s)
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# define sigemptyset(s) __sigemptyset(s)
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# define sigisemptyset(s) __sigisemptyset(s)
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#endif
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <string.h>
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/* There are two incompatible basename's, let's not use them! */
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/* See the dirname/basename man page for details */
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#include <libgen.h> /* dirname,basename */
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#undef basename
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#define basename dont_use_basename
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#include <poll.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#if !defined(major) || defined(__GLIBC__)
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# include <sys/sysmacros.h>
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#endif
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#include <sys/wait.h>
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#include <termios.h>
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#include <time.h>
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#include <sys/param.h>
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#include <pwd.h>
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#include <grp.h>
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#if ENABLE_FEATURE_SHADOWPASSWDS
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# if !ENABLE_USE_BB_SHADOW
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/* If using busybox's shadow implementation, do not include the shadow.h
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* header as the toolchain may not provide it at all.
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*/
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# include <shadow.h>
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# endif
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#endif
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#if defined(ANDROID) || defined(__ANDROID__)
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# define endpwent() ((void)0)
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# define endgrent() ((void)0)
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#endif
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#ifdef HAVE_MNTENT_H
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# include <mntent.h>
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#endif
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#ifdef HAVE_SYS_STATFS_H
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# include <sys/statfs.h>
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#endif
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/* Don't do this here:
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* #include <sys/sysinfo.h>
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* Some linux/ includes pull in conflicting definition
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* of struct sysinfo (only in some toolchanins), which breaks build.
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* Include sys/sysinfo.h only in those files which need it.
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*/
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#if ENABLE_SELINUX
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# include <selinux/selinux.h>
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# include <selinux/context.h>
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#endif
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#if ENABLE_FEATURE_UTMP
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# if defined __UCLIBC__ && ( \
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(UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 32) \
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&& UCLIBC_VERSION < KERNEL_VERSION(0, 9, 34) \
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&& defined __UCLIBC_HAS_UTMPX__ \
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) || ( \
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UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 34) \
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) \
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)
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# include <utmpx.h>
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# elif defined __UCLIBC__
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# include <utmp.h>
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# define utmpx utmp
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# define setutxent setutent
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# define endutxent endutent
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# define getutxent getutent
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# define getutxid getutid
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# define getutxline getutline
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# define pututxline pututline
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# define utmpxname utmpname
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# define updwtmpx updwtmp
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# define _PATH_UTMPX _PATH_UTMP
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# else
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# if !defined(__FreeBSD__)
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# include <utmp.h>
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# else
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# define _PATH_UTMPX "/var/run/utx.active"
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# endif
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# include <utmpx.h>
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# if defined _PATH_UTMP && !defined _PATH_UTMPX
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# define _PATH_UTMPX _PATH_UTMP
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# endif
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# endif
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#endif
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#if ENABLE_LOCALE_SUPPORT
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# include <locale.h>
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#else
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# define setlocale(x,y) ((void)0)
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#endif
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#ifdef DMALLOC
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# include <dmalloc.h>
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#endif
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/* Just in case libc doesn't define some of these... */
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#ifndef _PATH_PASSWD
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#define _PATH_PASSWD "/etc/passwd"
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#endif
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#ifndef _PATH_GROUP
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#define _PATH_GROUP "/etc/group"
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#endif
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#ifndef _PATH_SHADOW
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#define _PATH_SHADOW "/etc/shadow"
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#endif
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#ifndef _PATH_GSHADOW
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#define _PATH_GSHADOW "/etc/gshadow"
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#endif
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#if defined __FreeBSD__ || defined __OpenBSD__
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# include <netinet/in.h>
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# include <arpa/inet.h>
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#elif defined __APPLE__
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# include <netinet/in.h>
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#else
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# include <arpa/inet.h>
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//This breaks on bionic:
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//# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
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///* We #define socklen_t *after* includes, otherwise we get
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// * typedef redefinition errors from system headers
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// * (in case "is it defined already" detection above failed)
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// */
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//# define socklen_t bb_socklen_t
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// typedef unsigned socklen_t;
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//# endif
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//if this is still needed, add a fix along the lines of
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// ifdef SPECIFIC_BROKEN_LIBC_CHECK / typedef socklen_t / endif
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//in platform.h instead!
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#endif
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#ifndef HAVE_CLEARENV
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# define clearenv() do { if (environ) environ[0] = NULL; } while (0)
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#endif
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#ifndef HAVE_FDATASYNC
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# define fdatasync fsync
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#endif
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#ifndef HAVE_XTABS
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# define XTABS TAB3
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#endif
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/*
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* Use '%m' to append error string on platforms that support it,
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* '%s' and strerror() on those that don't.
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*/
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#ifdef HAVE_PRINTF_PERCENTM
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# define STRERROR_FMT "%m"
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# define STRERROR_ERRNO /*nothing*/
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#else
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# define STRERROR_FMT "%s"
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# define STRERROR_ERRNO ,strerror(errno)
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#endif
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/* Some libc's forget to declare these, do it ourself */
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extern char **environ;
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/* klogctl is in libc's klog.h, but we cheat and not #include that */
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int klogctl(int type, char *b, int len);
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#ifndef PATH_MAX
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# define PATH_MAX 256
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#endif
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#ifndef BUFSIZ
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# define BUFSIZ 4096
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#endif
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#if __GNUC_PREREQ(5,0)
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/* Since musl is apparently unable to get it right and would use
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* a function call to a single-instruction function of "bswap %eax",
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* reroute to gcc builtins:
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*/
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# undef bswap_16
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# undef bswap_32
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# undef bswap_64
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# define bswap_16(x) __builtin_bswap16(x)
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# define bswap_32(x) __builtin_bswap32(x)
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# define bswap_64(x) __builtin_bswap64(x)
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# if BB_LITTLE_ENDIAN
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# undef ntohs
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# undef htons
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# undef ntohl
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# undef htonl
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# define ntohs(x) __builtin_bswap16(x)
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# define htons(x) __builtin_bswap16(x)
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# define ntohl(x) __builtin_bswap32(x)
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# define htonl(x) __builtin_bswap32(x)
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# endif
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#endif
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/* Busybox does not use threads, we can speed up stdio. */
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#ifdef HAVE_UNLOCKED_STDIO
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# undef getc
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# define getc(stream) getc_unlocked(stream)
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# undef getchar
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# define getchar() getchar_unlocked()
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# undef putc
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# define putc(c,stream) putc_unlocked(c,stream)
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# undef putchar
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# define putchar(c) putchar_unlocked(c)
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# undef fgetc
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# define fgetc(stream) getc_unlocked(stream)
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# undef fputc
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# define fputc(c,stream) putc_unlocked(c,stream)
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#endif
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/* Above functions are required by POSIX.1-2008, below ones are extensions */
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#ifdef HAVE_UNLOCKED_LINE_OPS
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# undef fgets
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# define fgets(s,n,stream) fgets_unlocked(s,n,stream)
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# undef fputs
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# define fputs(s,stream) fputs_unlocked(s,stream)
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/* musl <= 1.1.15 does not support fflush_unlocked(NULL) */
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//# undef fflush
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//# define fflush(stream) fflush_unlocked(stream)
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# undef feof
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# define feof(stream) feof_unlocked(stream)
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# undef ferror
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# define ferror(stream) ferror_unlocked(stream)
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# undef fileno
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# define fileno(stream) fileno_unlocked(stream)
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#endif
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/* Make all declarations hidden (-fvisibility flag only affects definitions) */
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/* (don't include system headers after this until corresponding pop!) */
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PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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#if ENABLE_USE_BB_PWD_GRP
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# include "pwd_.h"
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# include "grp_.h"
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#endif
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#if ENABLE_FEATURE_SHADOWPASSWDS
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# if ENABLE_USE_BB_SHADOW
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# include "shadow_.h"
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# endif
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#endif
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/* Tested to work correctly with all int types (IIRC :]) */
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#define MAXINT(T) (T)( \
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((T)-1) > 0 \
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? (T)-1 \
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: (T)~((T)1 << (sizeof(T)*8-1)) \
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)
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#define MININT(T) (T)( \
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((T)-1) > 0 \
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? (T)0 \
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: ((T)1 << (sizeof(T)*8-1)) \
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)
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/* Large file support */
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/* Note that CONFIG_LFS=y forces bbox to be built with all common ops
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* (stat, lseek etc) mapped to "largefile" variants by libc.
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* Practically it means that open() automatically has O_LARGEFILE added
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* and all filesize/file_offset parameters and struct members are "large"
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* (in today's world - signed 64bit). For full support of large files,
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* we need a few helper #defines (below) and careful use of off_t
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* instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
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#if ENABLE_LFS
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/* CONFIG_LFS is on */
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# if ULONG_MAX > 0xffffffff
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/* "long" is long enough on this system */
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typedef unsigned long uoff_t;
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# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
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/* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
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# define BB_STRTOOFF bb_strtoul
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# define STRTOOFF strtoul
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/* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
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# define OFF_FMT "l"
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# else
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/* "long" is too short, need "long long" */
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typedef unsigned long long uoff_t;
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# define XATOOFF(a) xatoull_range((a), 0, LLONG_MAX)
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# define BB_STRTOOFF bb_strtoull
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# define STRTOOFF strtoull
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# define OFF_FMT "ll"
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# endif
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#else
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/* CONFIG_LFS is off */
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/* sizeof(off_t) == sizeof(long).
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* May or may not be == sizeof(int). If it is, use xatoi_positive()
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* and bb_strtou() instead of xatoul_range() and bb_strtoul().
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* Even if sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
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* gcc will throw warnings on printf("%d", off_t)... Have to use %ld etc.
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*/
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# if UINT_MAX == ULONG_MAX
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typedef unsigned long uoff_t;
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# define XATOOFF(a) xatoi_positive(a)
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# define BB_STRTOOFF bb_strtou
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# define STRTOOFF strtol
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# define OFF_FMT "l"
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# else
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typedef unsigned long uoff_t;
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# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
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# define BB_STRTOOFF bb_strtoul
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# define STRTOOFF strtol
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# define OFF_FMT "l"
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# endif
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#endif
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/* scary. better ideas? (but do *test* them first!) */
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#define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
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/* Users report bionic to use 32-bit off_t even if LARGEFILE support is requested.
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* On musl, !ENABLE_LFS on 32-bit arches thinks that off_t is 32-bit.
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* We misdetected that. Don't let it build:
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*/
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struct BUG_off_t_size_is_misdetected {
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char BUG_off_t_size_is_misdetected[sizeof(off_t) == sizeof(uoff_t) ? 1 : -1];
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};
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/* Some useful definitions */
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#undef FALSE
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#define FALSE ((int) 0)
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#undef TRUE
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#define TRUE ((int) 1)
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#undef SKIP
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#define SKIP ((int) 2)
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/* Macros for min/max. */
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#ifndef MIN
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#define MIN(a,b) (((a)<(b))?(a):(b))
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#endif
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#ifndef MAX
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#endif
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/* buffer allocation schemes */
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#if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
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#define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
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#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
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#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
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#else
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#if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
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#define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
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#define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
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#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
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#else
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#define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
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#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
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#define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
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#endif
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#endif
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/* We use a trick to have more optimized code (fewer pointer reloads
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* and reduced binary size by a few kilobytes) like:
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* ash.c: extern struct globals *const ash_ptr_to_globals;
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* ash_ptr_hack.c: struct globals *ash_ptr_to_globals;
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* This way, compiler in ash.c knows the pointer can not change.
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*
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* However, this may break on weird arches or toolchains. In this case,
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* set "-DBB_GLOBAL_CONST=''" in CONFIG_EXTRA_CFLAGS to disable
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* this optimization.
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*/
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#ifndef BB_GLOBAL_CONST
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# define BB_GLOBAL_CONST const
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#endif
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#if defined(errno)
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/* If errno is a define, assume it's "define errno (*__errno_location())"
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* and we will cache it's result in this variable */
|
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extern int *BB_GLOBAL_CONST bb_errno;
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# undef errno
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# define errno (*bb_errno)
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# define bb_cached_errno_ptr 1
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#endif
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#if !(ULONG_MAX > 0xffffffff)
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/* Only 32-bit CPUs need this, 64-bit ones use inlined version */
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uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
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#endif
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|
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unsigned long FAST_FUNC isqrt(unsigned long long N);
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|
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unsigned long long monotonic_ns(void) FAST_FUNC;
|
|
unsigned long long monotonic_us(void) FAST_FUNC;
|
|
unsigned long long monotonic_ms(void) FAST_FUNC;
|
|
unsigned monotonic_sec(void) FAST_FUNC;
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|
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extern void chomp(char *s) FAST_FUNC;
|
|
extern char *trim(char *s) FAST_FUNC;
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|
extern char *skip_whitespace(const char *) FAST_FUNC;
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|
extern char *skip_non_whitespace(const char *) FAST_FUNC;
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|
extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
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extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
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|
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/* dmalloc will redefine these to it's own implementation. It is safe
|
|
* to have the prototypes here unconditionally. */
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|
void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
|
|
void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
|
|
void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
|
|
void *xrealloc(void *old, size_t size) FAST_FUNC;
|
|
/* After v = xrealloc_vector(v, SHIFT, idx) it's ok to use
|
|
* at least v[idx] and v[idx+1], for all idx values.
|
|
* SHIFT specifies how many new elements are added (1:2, 2:4, ..., 8:256...)
|
|
* when all elements are used up. New elements are zeroed out.
|
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* xrealloc_vector(v, SHIFT, idx) *MUST* be called with consecutive IDXs -
|
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* skipping an index is a bad bug - it may miss a realloc!
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*/
|
|
#define xrealloc_vector(vector, shift, idx) \
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xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
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void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
|
|
char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
|
|
char *xstrndup(const char *s, size_t n) FAST_FUNC RETURNS_MALLOC;
|
|
void *xmemdup(const void *s, size_t n) FAST_FUNC RETURNS_MALLOC;
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|
void *mmap_read(int fd, size_t size) FAST_FUNC;
|
|
void *mmap_anon(size_t size) FAST_FUNC;
|
|
void *xmmap_anon(size_t size) FAST_FUNC;
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|
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#if defined(__x86_64__) || defined(i386)
|
|
# define BB_ARCH_FIXED_PAGESIZE 4096
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|
#elif defined(__arm__) /* only 32bit, 64bit ARM has variable page size */
|
|
# define BB_ARCH_FIXED_PAGESIZE 4096
|
|
#else /* if defined(ARCH) */
|
|
/* add you favorite arch today! */
|
|
//From Linux kernel inspection:
|
|
//xtenza,s390[x],riscv,nios2,csky,sparc32: fixed 4k pages
|
|
//sparc64,alpha,openrisc: fixed 8k pages
|
|
#endif
|
|
|
|
#if defined BB_ARCH_FIXED_PAGESIZE
|
|
# define IF_VARIABLE_ARCH_PAGESIZE(...) /*nothing*/
|
|
# define bb_getpagesize() BB_ARCH_FIXED_PAGESIZE
|
|
# define INIT_PAGESIZE(var) ((void)0)
|
|
# define cached_pagesize(var) BB_ARCH_FIXED_PAGESIZE
|
|
#else
|
|
# define IF_VARIABLE_ARCH_PAGESIZE(...) __VA_ARGS__
|
|
# define bb_getpagesize() getpagesize()
|
|
# define INIT_PAGESIZE(var) ((var) = getpagesize())
|
|
# define cached_pagesize(var) (var)
|
|
#endif
|
|
|
|
/* Generate ls-style "mode string" like "-rwsr-xr-x" or "drwxrwxrwt" */
|
|
extern char *bb_mode_string(char buf[11], mode_t mode) FAST_FUNC;
|
|
extern int is_directory(const char *name, int followLinks) FAST_FUNC;
|
|
enum { /* cp.c, mv.c, install.c depend on these values. CAREFUL when changing them! */
|
|
FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
|
|
FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
|
|
FILEUTILS_RECUR = 1 << 2, /* -R */
|
|
FILEUTILS_FORCE = 1 << 3, /* -f */
|
|
FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
|
|
FILEUTILS_NO_OVERWRITE = 1 << 5, /* -n */
|
|
FILEUTILS_MAKE_HARDLINK = 1 << 6, /* -l */
|
|
FILEUTILS_MAKE_SOFTLINK = 1 << 7, /* -s */
|
|
FILEUTILS_DEREF_SOFTLINK = 1 << 8, /* -L */
|
|
FILEUTILS_DEREFERENCE_L0 = 1 << 9, /* -H */
|
|
/* -a = -pdR (mapped in cp.c) */
|
|
/* -r = -dR (mapped in cp.c) */
|
|
/* -P = -d (mapped in cp.c) */
|
|
FILEUTILS_VERBOSE = (1 << 13) * ENABLE_FEATURE_VERBOSE, /* -v */
|
|
FILEUTILS_UPDATE = 1 << 14, /* -u */
|
|
FILEUTILS_NO_TARGET_DIR = 1 << 15, /* -T */
|
|
FILEUTILS_TARGET_DIR = 1 << 16, /* -t DIR */
|
|
#if ENABLE_SELINUX
|
|
FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 17, /* -c */
|
|
#endif
|
|
#define FILEUTILS_CP_OPTSTR "pdRfinlsLHarPvuTt:" IF_SELINUX("c")
|
|
/* How many bits in FILEUTILS_CP_OPTSTR? */
|
|
FILEUTILS_CP_OPTBITS = 18 - !ENABLE_SELINUX,
|
|
|
|
FILEUTILS_RMDEST = 1 << (19 - !ENABLE_SELINUX), /* cp --remove-destination */
|
|
/* bit 18 skipped for "cp --parents" */
|
|
FILEUTILS_REFLINK = 1 << (20 - !ENABLE_SELINUX), /* cp --reflink=auto */
|
|
FILEUTILS_REFLINK_ALWAYS = 1 << (21 - !ENABLE_SELINUX), /* cp --reflink[=always] */
|
|
/*
|
|
* Hole. cp may have some bits set here,
|
|
* they should not affect remove_file()/copy_file()
|
|
*/
|
|
#if ENABLE_SELINUX
|
|
FILEUTILS_SET_SECURITY_CONTEXT = 1 << 30,
|
|
#endif
|
|
FILEUTILS_IGNORE_CHMOD_ERR = 1 << 31,
|
|
};
|
|
|
|
extern int remove_file(const char *path, int flags) FAST_FUNC;
|
|
/* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
|
|
* the source, not copy (unless "source" is a directory).
|
|
* This makes "cp /dev/null file" and "install /dev/null file" (!!!)
|
|
* work coreutils-compatibly. */
|
|
extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
|
|
|
|
enum {
|
|
ACTION_RECURSE = (1 << 0),
|
|
ACTION_FOLLOWLINKS = (1 << 1),
|
|
ACTION_FOLLOWLINKS_L0 = (1 << 2),
|
|
ACTION_DEPTHFIRST = (1 << 3),
|
|
ACTION_QUIET = (1 << 4),
|
|
ACTION_DANGLING_OK = (1 << 5),
|
|
};
|
|
typedef uint8_t recurse_flags_t;
|
|
typedef struct recursive_state {
|
|
unsigned flags;
|
|
unsigned depth;
|
|
void *userData;
|
|
int FAST_FUNC (*fileAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf);
|
|
int FAST_FUNC (*dirAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf);
|
|
} recursive_state_t;
|
|
int recursive_action(const char *fileName, unsigned flags,
|
|
int FAST_FUNC (*fileAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf),
|
|
int FAST_FUNC (*dirAction)(struct recursive_state *state, const char *fileName, struct stat* statbuf),
|
|
void *userData
|
|
) FAST_FUNC;
|
|
|
|
/* Simpler version: call a function on each dirent in a directory */
|
|
int iterate_on_dir(const char *dir_name,
|
|
int FAST_FUNC (*func)(const char *, struct dirent *, void *),
|
|
void *private) FAST_FUNC;
|
|
|
|
extern int device_open(const char *device, int mode) FAST_FUNC;
|
|
enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
|
|
extern int xgetpty(char *line) FAST_FUNC;
|
|
extern int get_console_fd_or_die(void) FAST_FUNC;
|
|
extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
|
|
extern char *find_block_device(const char *path) FAST_FUNC;
|
|
/* bb_copyfd_XX print read/write errors and return -1 if they occur */
|
|
extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
|
|
extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
|
|
extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
|
|
/* "short" copy can be detected by return value < size */
|
|
/* this helper yells "short read!" if param is not -1 */
|
|
extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
|
|
|
|
extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
|
|
char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC;
|
|
/* xxxx_strip version can modify its parameter:
|
|
* "/" -> "/"
|
|
* "abc" -> "abc"
|
|
* "abc/def" -> "def"
|
|
* "abc/def/" -> "def" !!
|
|
*/
|
|
char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
|
|
/* "abc/def/" -> "" and it never modifies 'path' */
|
|
char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
|
|
/* Simpler version: does not special case "/" string */
|
|
const char *bb_basename(const char *name) FAST_FUNC;
|
|
/* NB: can violate const-ness (similarly to strchr) */
|
|
char *last_char_is(const char *s, int c) FAST_FUNC;
|
|
const char* endofname(const char *name) FAST_FUNC;
|
|
char *is_prefixed_with(const char *string, const char *key) FAST_FUNC;
|
|
char *is_suffixed_with(const char *string, const char *key) FAST_FUNC;
|
|
|
|
int ndelay_on(int fd) FAST_FUNC;
|
|
int ndelay_off(int fd) FAST_FUNC;
|
|
void close_on_exec_on(int fd) FAST_FUNC;
|
|
void xdup2(int, int) FAST_FUNC;
|
|
void xmove_fd(int, int) FAST_FUNC;
|
|
|
|
|
|
DIR *xopendir(const char *path) FAST_FUNC;
|
|
DIR *warn_opendir(const char *path) FAST_FUNC;
|
|
|
|
char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
char *xmalloc_realpath_coreutils(char *path) FAST_FUNC RETURNS_MALLOC;
|
|
char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
/* !RETURNS_MALLOC: it's a realloc-like function */
|
|
char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
|
|
|
|
char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
|
|
|
|
|
|
enum {
|
|
/* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
|
|
* otherwise would kill us, except for those resulting from bugs:
|
|
* SIGSEGV, SIGILL, SIGFPE.
|
|
* Other fatal signals not included (TODO?):
|
|
* SIGBUS Bus error (bad memory access)
|
|
* SIGPOLL Pollable event. Synonym of SIGIO
|
|
* SIGPROF Profiling timer expired
|
|
* SIGSYS Bad argument to routine
|
|
* SIGTRAP Trace/breakpoint trap
|
|
*
|
|
* The only known arch with some of these sigs not fitting
|
|
* into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
|
|
* Dance around with long long to guard against that...
|
|
*/
|
|
BB_FATAL_SIGS = (int)(0
|
|
+ (1LL << SIGHUP)
|
|
+ (1LL << SIGINT)
|
|
+ (1LL << SIGTERM)
|
|
+ (1LL << SIGPIPE) // Write to pipe with no readers
|
|
+ (1LL << SIGQUIT) // Quit from keyboard
|
|
+ (1LL << SIGABRT) // Abort signal from abort(3)
|
|
+ (1LL << SIGALRM) // Timer signal from alarm(2)
|
|
+ (1LL << SIGVTALRM) // Virtual alarm clock
|
|
+ (1LL << SIGXCPU) // CPU time limit exceeded
|
|
+ (1LL << SIGXFSZ) // File size limit exceeded
|
|
+ (1LL << SIGUSR1) // Yes kids, these are also fatal!
|
|
+ (1LL << SIGUSR2)
|
|
+ 0),
|
|
};
|
|
void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
|
|
/* Unlike signal() and bb_signals, sets handler with sigaction()
|
|
* and in a way that while signal handler is run, no other signals
|
|
* will be blocked; syscalls will not be restarted: */
|
|
void bb_signals_norestart(int sigs, void (*f)(int)) FAST_FUNC;
|
|
/* syscalls like read() will be interrupted with EINTR: */
|
|
void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
|
|
/* syscalls like read() won't be interrupted (though select/poll will be): */
|
|
void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
|
|
void wait_for_any_sig(void) FAST_FUNC;
|
|
void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
|
|
void sig_block(int sig) FAST_FUNC;
|
|
void sig_unblock(int sig) FAST_FUNC;
|
|
/* Will do sigaction(signum, act, NULL): */
|
|
int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
|
|
/* SIG_BLOCK/SIG_UNBLOCK all signals: */
|
|
int sigprocmask_allsigs(int how) FAST_FUNC;
|
|
/* Return old set in the same set: */
|
|
int sigprocmask2(int how, sigset_t *set) FAST_FUNC;
|
|
/* Standard handler which just records signo */
|
|
extern smallint bb_got_signal;
|
|
void record_signo(int signo); /* not FAST_FUNC! */
|
|
|
|
|
|
void xsetgid(gid_t gid) FAST_FUNC;
|
|
void xsetuid(uid_t uid) FAST_FUNC;
|
|
void xsetegid(gid_t egid) FAST_FUNC;
|
|
void xseteuid(uid_t euid) FAST_FUNC;
|
|
int chdir_or_warn(const char *path) FAST_FUNC;
|
|
void xchdir(const char *path) FAST_FUNC;
|
|
void xfchdir(int fd) FAST_FUNC;
|
|
void xchroot(const char *path) FAST_FUNC;
|
|
void xsetenv(const char *key, const char *value) FAST_FUNC;
|
|
void bb_unsetenv(const char *key) FAST_FUNC;
|
|
void bb_unsetenv_and_free(char *key) FAST_FUNC;
|
|
void xunlink(const char *pathname) FAST_FUNC;
|
|
void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
|
|
void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC;
|
|
int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
|
|
int open_or_warn(const char *pathname, int flags) FAST_FUNC;
|
|
int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
|
|
int xopen(const char *pathname, int flags) FAST_FUNC;
|
|
int xopen_nonblocking(const char *pathname) FAST_FUNC;
|
|
int xopen_as_uid_gid(const char *pathname, int flags, uid_t u, gid_t g) FAST_FUNC;
|
|
int open_or_warn_stdin(const char *pathname) FAST_FUNC;
|
|
int xopen_stdin(const char *pathname) FAST_FUNC;
|
|
void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
|
|
int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
|
|
off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
|
|
int xmkstemp(char *template) FAST_FUNC;
|
|
off_t fdlength(int fd) FAST_FUNC;
|
|
|
|
uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
|
|
const char *override,
|
|
unsigned override_units,
|
|
int extend);
|
|
|
|
void xpipe(int *filedes) FAST_FUNC;
|
|
/* In this form code with pipes is much more readable */
|
|
struct fd_pair { int rd; int wr; };
|
|
#define piped_pair(pair) pipe(&((pair).rd))
|
|
#define xpiped_pair(pair) xpipe(&((pair).rd))
|
|
|
|
/* Useful for having small structure members/global variables */
|
|
typedef int8_t socktype_t;
|
|
typedef int8_t family_t;
|
|
struct BUG_too_small {
|
|
char BUG_socktype_t_too_small[(0
|
|
| SOCK_STREAM
|
|
| SOCK_DGRAM
|
|
| SOCK_RDM
|
|
| SOCK_SEQPACKET
|
|
| SOCK_RAW
|
|
) <= 127 ? 1 : -1];
|
|
char BUG_family_t_too_small[(0
|
|
| AF_UNSPEC
|
|
| AF_INET
|
|
| AF_INET6
|
|
| AF_UNIX
|
|
#ifdef AF_PACKET
|
|
| AF_PACKET
|
|
#endif
|
|
#ifdef AF_NETLINK
|
|
| AF_NETLINK
|
|
#endif
|
|
/* | AF_DECnet */
|
|
/* | AF_IPX */
|
|
) <= 127 ? 1 : -1];
|
|
};
|
|
|
|
|
|
int parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
|
|
time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
|
|
char *strftime_HHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC;
|
|
char *strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC;
|
|
void xgettimeofday(struct timeval *tv) FAST_FUNC;
|
|
void xsettimeofday(const struct timeval *tv) FAST_FUNC;
|
|
|
|
|
|
int xsocket(int domain, int type, int protocol) FAST_FUNC;
|
|
void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
|
|
void xlisten(int s, int backlog) FAST_FUNC;
|
|
void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
|
|
ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
|
|
socklen_t tolen) FAST_FUNC;
|
|
|
|
int setsockopt_int(int fd, int level, int optname, int optval) FAST_FUNC;
|
|
int setsockopt_1(int fd, int level, int optname) FAST_FUNC;
|
|
int setsockopt_SOL_SOCKET_int(int fd, int optname, int optval) FAST_FUNC;
|
|
int setsockopt_SOL_SOCKET_1(int fd, int optname) FAST_FUNC;
|
|
/* SO_REUSEADDR allows a server to rebind to an address that is already
|
|
* "in use" by old connections to e.g. previous server instance which is
|
|
* killed or crashed. Without it bind will fail until all such connections
|
|
* time out. Linux does not allow multiple live binds on same ip:port
|
|
* regardless of SO_REUSEADDR (unlike some other flavors of Unix).
|
|
* Turn it on before you call bind(). */
|
|
void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
|
|
int setsockopt_keepalive(int fd) FAST_FUNC;
|
|
int setsockopt_broadcast(int fd) FAST_FUNC;
|
|
int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
|
|
int bb_getsockname(int sockfd, void *addr, socklen_t addrlen) FAST_FUNC;
|
|
/* NB: returns port in host byte order */
|
|
unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
|
|
#if ENABLE_FEATURE_ETC_SERVICES
|
|
# define bb_lookup_std_port(portstr, protocol, portnum) bb_lookup_port(portstr, protocol, portnum)
|
|
#else
|
|
# define bb_lookup_std_port(portstr, protocol, portnum) (portnum)
|
|
#endif
|
|
typedef struct len_and_sockaddr {
|
|
socklen_t len;
|
|
union {
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sin;
|
|
#if ENABLE_FEATURE_IPV6
|
|
struct sockaddr_in6 sin6;
|
|
#endif
|
|
} u;
|
|
} len_and_sockaddr;
|
|
enum {
|
|
LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
|
|
LSA_SIZEOF_SA = sizeof(
|
|
union {
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sin;
|
|
#if ENABLE_FEATURE_IPV6
|
|
struct sockaddr_in6 sin6;
|
|
#endif
|
|
}
|
|
)
|
|
};
|
|
/* Create stream socket, and allocate suitable lsa.
|
|
* (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
|
|
* af == AF_UNSPEC will result in trying to create IPv6 socket,
|
|
* and if kernel doesn't support it, fall back to IPv4.
|
|
* This is useful if you plan to bind to resulting local lsa.
|
|
*/
|
|
int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
|
|
int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
|
|
/* Create server socket bound to bindaddr:port. bindaddr can be NULL,
|
|
* numeric IP ("N.N.N.N") or numeric IPv6 address,
|
|
* and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
|
|
* Only if there is no suffix, port argument is used */
|
|
/* NB: these set SO_REUSEADDR before bind */
|
|
int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
|
|
int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
|
|
int create_and_bind_to_netlink(int proto, int grp, unsigned rcvbuf) FAST_FUNC;
|
|
/* Create client TCP socket connected to peer:port. Peer cannot be NULL.
|
|
* Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
|
|
* and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
|
|
* If there is no suffix, port argument is used */
|
|
int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
|
|
/* Connect to peer identified by lsa */
|
|
int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
|
|
/* Get local address of bound or accepted socket */
|
|
len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
|
|
/* Get remote address of connected or accepted socket */
|
|
len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
|
|
/* Return malloc'ed len_and_sockaddr with socket address of host:port
|
|
* Currently will return IPv4 or IPv6 sockaddrs only
|
|
* (depending on host), but in theory nothing prevents e.g.
|
|
* UNIX socket address being returned, IPX sockaddr etc...
|
|
* On error does bb_error_msg and returns NULL */
|
|
len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
|
|
/* Version which dies on error */
|
|
len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
|
|
len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
|
|
/* Same, useful if you want to force family (e.g. IPv6) */
|
|
#if !ENABLE_FEATURE_IPV6
|
|
#define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
|
|
#define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
|
|
#else
|
|
len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
|
|
len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
|
|
#endif
|
|
/* Assign sin[6]_port member if the socket is an AF_INET[6] one,
|
|
* otherwise no-op. Useful for ftp.
|
|
* NB: does NOT do htons() internally, just direct assignment. */
|
|
void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC;
|
|
/* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
|
|
int get_nport(const struct sockaddr *sa) FAST_FUNC;
|
|
/* Reverse DNS. Returns NULL on failure. */
|
|
char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
/* This one doesn't append :PORTNUM */
|
|
char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
/* This one also doesn't fall back to dotted IP (returns NULL) */
|
|
char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
/* inet_[ap]ton on steroids */
|
|
char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
|
|
// "old" (ipv4 only) API
|
|
// users: traceroute.c hostname.c - use _list_ of all IPs
|
|
struct hostent *xgethostbyname(const char *name) FAST_FUNC;
|
|
// Also mount.c and inetd.c are using gethostbyname(),
|
|
// + inet_common.c has additional IPv4-only stuff
|
|
|
|
|
|
struct tls_aes {
|
|
uint32_t key[60];
|
|
unsigned rounds;
|
|
};
|
|
#define TLS_MAX_MAC_SIZE 32
|
|
#define TLS_MAX_KEY_SIZE 32
|
|
#define TLS_MAX_IV_SIZE 4
|
|
struct tls_handshake_data; /* opaque */
|
|
typedef struct tls_state {
|
|
unsigned flags;
|
|
|
|
int ofd;
|
|
int ifd;
|
|
|
|
unsigned min_encrypted_len_on_read;
|
|
uint16_t cipher_id;
|
|
unsigned MAC_size;
|
|
unsigned key_size;
|
|
unsigned IV_size;
|
|
|
|
uint8_t *outbuf;
|
|
int outbuf_size;
|
|
|
|
int inbuf_size;
|
|
int ofs_to_buffered;
|
|
int buffered_size;
|
|
uint8_t *inbuf;
|
|
|
|
struct tls_handshake_data *hsd;
|
|
|
|
// RFC 5246
|
|
// sequence number
|
|
// Each connection state contains a sequence number, which is
|
|
// maintained separately for read and write states. The sequence
|
|
// number MUST be set to zero whenever a connection state is made the
|
|
// active state. Sequence numbers are of type uint64 and may not
|
|
// exceed 2^64-1.
|
|
/*uint64_t read_seq64_be;*/
|
|
uint64_t write_seq64_be;
|
|
|
|
/*uint8_t *server_write_MAC_key;*/
|
|
uint8_t *client_write_key;
|
|
uint8_t *server_write_key;
|
|
uint8_t *client_write_IV;
|
|
uint8_t *server_write_IV;
|
|
uint8_t client_write_MAC_key[TLS_MAX_MAC_SIZE];
|
|
uint8_t server_write_MAC_k__[TLS_MAX_MAC_SIZE];
|
|
uint8_t client_write_k__[TLS_MAX_KEY_SIZE];
|
|
uint8_t server_write_k__[TLS_MAX_KEY_SIZE];
|
|
uint8_t client_write_I_[TLS_MAX_IV_SIZE];
|
|
uint8_t server_write_I_[TLS_MAX_IV_SIZE];
|
|
|
|
struct tls_aes aes_encrypt;
|
|
struct tls_aes aes_decrypt;
|
|
uint8_t H[16]; //used by AES_GCM
|
|
} tls_state_t;
|
|
|
|
static inline tls_state_t *new_tls_state(void)
|
|
{
|
|
tls_state_t *tls = xzalloc(sizeof(*tls));
|
|
return tls;
|
|
}
|
|
void tls_handshake(tls_state_t *tls, const char *sni) FAST_FUNC;
|
|
#define TLSLOOP_EXIT_ON_LOCAL_EOF (1 << 0)
|
|
void tls_run_copy_loop(tls_state_t *tls, unsigned flags) FAST_FUNC;
|
|
|
|
|
|
void socket_want_pktinfo(int fd) FAST_FUNC;
|
|
ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
|
|
const struct sockaddr *to,
|
|
const struct sockaddr *from,
|
|
socklen_t tolen) FAST_FUNC;
|
|
ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
|
|
struct sockaddr *from,
|
|
struct sockaddr *to,
|
|
socklen_t sa_size) FAST_FUNC;
|
|
|
|
uint16_t inet_cksum(const void *addr, int len) FAST_FUNC;
|
|
int parse_pasv_epsv(char *buf) FAST_FUNC;
|
|
|
|
/* 0 if argv[0] is NULL: */
|
|
unsigned string_array_len(char **argv) FAST_FUNC;
|
|
void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
|
|
char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
|
|
char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
|
|
unsigned count_strstr(const char *str, const char *sub) FAST_FUNC;
|
|
char *xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl) FAST_FUNC;
|
|
/* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
|
|
* But potentially slow, don't use in one-billion-times loops */
|
|
int bb_putchar(int ch) FAST_FUNC;
|
|
/* Note: does not use stdio, writes to fd 2 directly */
|
|
int bb_putchar_stderr(char ch) FAST_FUNC;
|
|
int fputs_stdout(const char *s) FAST_FUNC;
|
|
char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
|
|
char *auto_string(char *str) FAST_FUNC;
|
|
// gcc-4.1.1 still isn't good enough at optimizing it
|
|
// (+200 bytes compared to macro)
|
|
//static ALWAYS_INLINE
|
|
//int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
|
|
//static ALWAYS_INLINE
|
|
//int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
|
|
#define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
|
|
#define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
|
|
#define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
|
|
#define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
|
|
#define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
|
|
|
|
typedef struct uni_stat_t {
|
|
unsigned byte_count;
|
|
unsigned unicode_count;
|
|
unsigned unicode_width;
|
|
} uni_stat_t;
|
|
/* Returns a string with unprintable chars replaced by '?' or
|
|
* SUBST_WCHAR. This function is unicode-aware. */
|
|
const char* FAST_FUNC printable_string(const char *str);
|
|
const char* FAST_FUNC printable_string2(uni_stat_t *stats, const char *str);
|
|
/* Prints unprintable char ch as ^C or M-c to file
|
|
* (M-c is used only if ch is ORed with PRINTABLE_META),
|
|
* else it is printed as-is (except for ch = 0x9b) */
|
|
enum { PRINTABLE_META = 0x100 };
|
|
void fputc_printable(int ch, FILE *file) FAST_FUNC;
|
|
/* Return a string that is the printable representation of character ch.
|
|
* Buffer must hold at least four characters. */
|
|
enum {
|
|
VISIBLE_ENDLINE = 1 << 0,
|
|
VISIBLE_SHOW_TABS = 1 << 1,
|
|
};
|
|
void visible(unsigned ch, char *buf, int flags) FAST_FUNC;
|
|
|
|
extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
|
|
extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count) FAST_FUNC;
|
|
// NB: will return short read on error, not -1,
|
|
// if some data was read before error occurred
|
|
extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
|
|
extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
|
|
extern unsigned char xread_char(int fd) FAST_FUNC;
|
|
extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
|
|
extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
|
|
// Reads one line a-la fgets (but doesn't save terminating '\n').
|
|
// Reads byte-by-byte. Useful when it is important to not read ahead.
|
|
// Bytes are appended to pfx (which must be malloced, or NULL).
|
|
extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC;
|
|
/* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
|
|
extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
extern void *xmalloc_read_with_initial_buf(int fd, size_t *maxsz_p, char *buf, size_t total) FAST_FUNC;
|
|
/* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
|
|
extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
/* Never returns NULL */
|
|
extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
|
|
#if defined(ARG_MAX) && (ARG_MAX >= 60*1024 || !defined(_SC_ARG_MAX))
|
|
/* Use _constant_ maximum if: defined && (big enough || no variable one exists) */
|
|
# define bb_arg_max() ((unsigned)ARG_MAX)
|
|
#elif defined(_SC_ARG_MAX)
|
|
/* Else use variable one (a bit more expensive) */
|
|
unsigned bb_arg_max(void) FAST_FUNC;
|
|
#else
|
|
/* If all else fails */
|
|
# define bb_arg_max() ((unsigned)(32 * 1024))
|
|
#endif
|
|
unsigned bb_clk_tck(void) FAST_FUNC;
|
|
|
|
#define SEAMLESS_COMPRESSION (0 \
|
|
|| ENABLE_FEATURE_SEAMLESS_XZ \
|
|
|| ENABLE_FEATURE_SEAMLESS_LZMA \
|
|
|| ENABLE_FEATURE_SEAMLESS_BZ2 \
|
|
|| ENABLE_FEATURE_SEAMLESS_GZ \
|
|
|| ENABLE_FEATURE_SEAMLESS_Z)
|
|
|
|
#if SEAMLESS_COMPRESSION
|
|
/* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
|
|
int setup_unzip_on_fd(int fd, int fail_if_not_compressed) FAST_FUNC;
|
|
/* Autodetects .gz etc */
|
|
extern int open_zipped(const char *fname, int fail_if_not_compressed) FAST_FUNC;
|
|
extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
#else
|
|
# define setup_unzip_on_fd(...) (0)
|
|
# define open_zipped(fname, fail_if_not_compressed) open((fname), O_RDONLY);
|
|
# define xmalloc_open_zipped_read_close(fname, maxsz_p) xmalloc_open_read_close((fname), (maxsz_p))
|
|
#endif
|
|
/* lzma has no signature, need a little helper. NB: exist only for ENABLE_FEATURE_SEAMLESS_LZMA=y */
|
|
void setup_lzma_on_fd(int fd) FAST_FUNC;
|
|
|
|
extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
|
|
// NB: will return short write on error, not -1,
|
|
// if some data was written before error occurred
|
|
extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
|
|
extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
|
|
extern void xwrite_str(int fd, const char *str) FAST_FUNC;
|
|
extern ssize_t full_write1_str(const char *str) FAST_FUNC;
|
|
extern ssize_t full_write2_str(const char *str) FAST_FUNC;
|
|
extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
|
|
|
|
/* Close fd, but check for failures (some types of write errors) */
|
|
extern void xclose(int fd) FAST_FUNC;
|
|
|
|
/* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
|
|
extern void xprint_and_close_file(FILE *file) FAST_FUNC;
|
|
|
|
/* Reads a line from a text file, up to a newline or NUL byte, inclusive.
|
|
* Returns malloc'ed char*. If end is NULL '\n' isn't considered
|
|
* end of line. If end isn't NULL, length of the chunk is stored in it.
|
|
* Returns NULL if EOF/error.
|
|
*/
|
|
extern char *bb_get_chunk_from_file(FILE *file, size_t *end) FAST_FUNC;
|
|
/* Reads up to (and including) TERMINATING_STRING: */
|
|
extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
|
|
/* Same, with limited max size, and returns the length (excluding NUL): */
|
|
extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
|
|
/* Chops off TERMINATING_STRING from the end: */
|
|
extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
|
|
/* Reads up to (and including) "\n" or NUL byte: */
|
|
extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
|
|
/* Chops off '\n' from the end, unlike fgets: */
|
|
extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
|
|
/* Same, but doesn't try to conserve space (may have some slack after the end) */
|
|
/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
|
|
|
|
void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
|
|
void die_if_ferror_stdout(void) FAST_FUNC;
|
|
int fflush_all(void) FAST_FUNC;
|
|
void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
|
|
void fflush_stdout_and_exit_SUCCESS(void) NORETURN FAST_FUNC;
|
|
int fclose_if_not_stdin(FILE *file) FAST_FUNC;
|
|
FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
|
|
/* Prints warning to stderr and returns NULL on failure: */
|
|
FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
|
|
/* "Opens" stdin if filename is special, else just opens file: */
|
|
FILE* xfopen_stdin(const char *filename) FAST_FUNC;
|
|
FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
|
|
FILE* fopen_for_read(const char *path) FAST_FUNC;
|
|
FILE* xfopen_for_read(const char *path) FAST_FUNC;
|
|
FILE* fopen_for_write(const char *path) FAST_FUNC;
|
|
FILE* xfopen_for_write(const char *path) FAST_FUNC;
|
|
FILE* xfdopen_for_read(int fd) FAST_FUNC;
|
|
FILE* xfdopen_for_write(int fd) FAST_FUNC;
|
|
|
|
int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
|
|
void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
|
|
|
|
/* Wrapper which restarts poll on EINTR or ENOMEM.
|
|
* On other errors complains [perror("poll")] and returns.
|
|
* Warning! May take (much) longer than timeout_ms to return!
|
|
* If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
|
|
int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
|
|
|
|
char *safe_gethostname(void) FAST_FUNC;
|
|
|
|
/* Convert each alpha char in str to lower-case */
|
|
char* str_tolower(char *str) FAST_FUNC;
|
|
|
|
char *utoa(unsigned n) FAST_FUNC;
|
|
char *itoa(int n) FAST_FUNC;
|
|
/* Returns a pointer past the formatted number, does NOT null-terminate */
|
|
char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
|
|
char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
|
|
/* Intelligent formatters of bignums */
|
|
char *smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale) FAST_FUNC;
|
|
char *smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
|
|
/* If block_size == 0, display size without fractional part,
|
|
* else display (size * block_size) with one decimal digit.
|
|
* If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
|
|
* else divide by display_unit and do not use suffix.
|
|
* Returns "auto pointer" */
|
|
#define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
|
|
#define HUMAN_READABLE_MAX_WIDTH_STR "7"
|
|
const char *make_human_readable_str(unsigned long long size,
|
|
unsigned long block_size, unsigned long display_unit) FAST_FUNC;
|
|
/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
|
|
char *bin2hex(char *dst, const char *src, int count) FAST_FUNC;
|
|
/* Reverse */
|
|
char* hex2bin(char *dst, const char *src, int count) FAST_FUNC;
|
|
|
|
/* Generate a UUID */
|
|
void generate_uuid(uint8_t *buf) FAST_FUNC;
|
|
|
|
/* Last element is marked by mult == 0 */
|
|
struct suffix_mult {
|
|
char suffix[4];
|
|
uint32_t mult;
|
|
};
|
|
#define ALIGN_SUFFIX ALIGN4
|
|
extern const struct suffix_mult bkm_suffixes[];
|
|
#define km_suffixes (bkm_suffixes + 1)
|
|
extern const struct suffix_mult cwbkMG_suffixes[];
|
|
#define kMG_suffixes (cwbkMG_suffixes + 3)
|
|
extern const struct suffix_mult kmg_i_suffixes[];
|
|
|
|
#include "xatonum.h"
|
|
/* Specialized: */
|
|
|
|
/* Using xatoi() instead of naive atoi() is not always convenient -
|
|
* in many places people want *non-negative* values, but store them
|
|
* in signed int. Therefore we need this one:
|
|
* dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc.
|
|
* It should really be named xatoi_nonnegative (since it allows 0),
|
|
* but that would be too long.
|
|
*/
|
|
int xatoi_positive(const char *numstr) FAST_FUNC;
|
|
|
|
/* Useful for reading port numbers */
|
|
uint16_t xatou16(const char *numstr) FAST_FUNC;
|
|
|
|
#if ENABLE_FLOAT_DURATION
|
|
typedef double duration_t;
|
|
void sleep_for_duration(duration_t duration) FAST_FUNC;
|
|
#define DURATION_FMT "f"
|
|
#else
|
|
typedef unsigned duration_t;
|
|
#define sleep_for_duration(duration) sleep(duration)
|
|
#define DURATION_FMT "u"
|
|
#endif
|
|
duration_t parse_duration_str(char *str) FAST_FUNC;
|
|
|
|
/* These parse entries in /etc/passwd and /etc/group. This is desirable
|
|
* for BusyBox since we want to avoid using the glibc NSS stuff, which
|
|
* increases target size and is often not needed on embedded systems. */
|
|
long xuname2uid(const char *name) FAST_FUNC;
|
|
long xgroup2gid(const char *name) FAST_FUNC;
|
|
/* wrapper: allows string to contain numeric uid or gid */
|
|
unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
|
|
struct bb_uidgid_t {
|
|
uid_t uid;
|
|
gid_t gid;
|
|
};
|
|
/* always sets uid and gid; returns 0 on failure */
|
|
int get_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
|
|
/* always sets uid and gid; exits on failure */
|
|
void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
|
|
/* chown-like handling of "user[:[group]" */
|
|
void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
|
|
struct passwd* xgetpwnam(const char *name) FAST_FUNC;
|
|
struct group* xgetgrnam(const char *name) FAST_FUNC;
|
|
struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
|
|
struct group* xgetgrgid(gid_t gid) FAST_FUNC;
|
|
char* xuid2uname(uid_t uid) FAST_FUNC;
|
|
char* xgid2group(gid_t gid) FAST_FUNC;
|
|
char* uid2uname(uid_t uid) FAST_FUNC;
|
|
char* gid2group(gid_t gid) FAST_FUNC;
|
|
char* uid2uname_utoa(uid_t uid) FAST_FUNC;
|
|
char* gid2group_utoa(gid_t gid) FAST_FUNC;
|
|
/* versions which cache results (useful for ps, ls etc) */
|
|
const char* get_cached_username(uid_t uid) FAST_FUNC;
|
|
const char* get_cached_groupname(gid_t gid) FAST_FUNC;
|
|
void clear_username_cache(void) FAST_FUNC;
|
|
/* internally usernames are saved in fixed-sized char[] buffers */
|
|
enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) };
|
|
#if ENABLE_FEATURE_CHECK_NAMES
|
|
void die_if_bad_username(const char* name) FAST_FUNC;
|
|
#else
|
|
#define die_if_bad_username(name) ((void)(name))
|
|
#endif
|
|
/*
|
|
* Returns (-1) terminated malloced result of getgroups().
|
|
* Reallocs group_array (useful for repeated calls).
|
|
* ngroups is an initial size of array. It is rounded up to 32 for realloc.
|
|
* ngroups is updated on return.
|
|
* ngroups can be NULL: bb_getgroups(NULL, NULL) is valid usage.
|
|
* Dies on errors (on Linux, only xrealloc can cause this, not internal getgroups call).
|
|
*/
|
|
gid_t *bb_getgroups(int *ngroups, gid_t *group_array) FAST_FUNC;
|
|
|
|
#if ENABLE_FEATURE_UTMP
|
|
void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
|
|
void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
|
|
void FAST_FUNC update_utmp_DEAD_PROCESS(pid_t pid);
|
|
#else
|
|
# define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
|
|
# define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
|
|
# define update_utmp_DEAD_PROCESS(pid) ((void)0)
|
|
#endif
|
|
|
|
|
|
int file_is_executable(const char *name) FAST_FUNC;
|
|
char *find_executable(const char *filename, char **PATHp) FAST_FUNC;
|
|
int executable_exists(const char *filename) FAST_FUNC;
|
|
|
|
/* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
|
|
* but it may exec busybox and call applet instead of searching PATH.
|
|
*/
|
|
#if ENABLE_FEATURE_PREFER_APPLETS
|
|
int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC;
|
|
#define BB_EXECLP(prog,cmd,...) \
|
|
do { \
|
|
if (find_applet_by_name(prog) >= 0) \
|
|
execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \
|
|
execlp(prog, cmd, __VA_ARGS__); \
|
|
} while (0)
|
|
#else
|
|
#define BB_EXECVP(prog,cmd) execvp(prog,cmd)
|
|
#define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__)
|
|
#endif
|
|
void BB_EXECVP_or_die(char **argv) NORETURN FAST_FUNC;
|
|
|
|
/* xvfork() can't be a _function_, return after vfork in child mangles stack
|
|
* in the parent. It must be a macro. */
|
|
#define xvfork() \
|
|
({ \
|
|
pid_t bb__xvfork_pid = vfork(); \
|
|
if (bb__xvfork_pid < 0) \
|
|
bb_simple_perror_msg_and_die("vfork"); \
|
|
bb__xvfork_pid; \
|
|
})
|
|
#if BB_MMU
|
|
pid_t xfork(void) FAST_FUNC;
|
|
#endif
|
|
void xvfork_parent_waits_and_exits(void) FAST_FUNC;
|
|
|
|
/* NOMMU friendy fork+exec: */
|
|
pid_t spawn(char **argv) FAST_FUNC;
|
|
pid_t xspawn(char **argv) FAST_FUNC;
|
|
|
|
pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
|
|
pid_t wait_any_nohang(int *wstat) FAST_FUNC;
|
|
/* wait4pid: unlike waitpid, waits ONLY for one process.
|
|
* Returns sig + 0x180 if child is killed by signal.
|
|
* It's safe to pass negative 'pids' from failed [v]fork -
|
|
* wait4pid will return -1 (and will not clobber [v]fork's errno).
|
|
* IOW: rc = wait4pid(spawn(argv));
|
|
* if (rc < 0) bb_perror_msg("%s", argv[0]);
|
|
* if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
|
|
*/
|
|
int wait4pid(pid_t pid) FAST_FUNC;
|
|
int wait_for_exitstatus(pid_t pid) FAST_FUNC;
|
|
/************************************************************************/
|
|
/* spawn_and_wait/run_nofork_applet/run_applet_no_and_exit need to work */
|
|
/* carefully together to reinit some global state while not disturbing */
|
|
/* other. Be careful if you change them. Consult docs/nofork_noexec.txt */
|
|
/************************************************************************/
|
|
/* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
|
|
int spawn_and_wait(char **argv) FAST_FUNC;
|
|
/* Does NOT check that applet is NOFORK, just blindly runs it */
|
|
int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
|
|
void run_noexec_applet_and_exit(int a, const char *name, char **argv) NORETURN FAST_FUNC;
|
|
#ifndef BUILD_INDIVIDUAL
|
|
int find_applet_by_name(const char *name) FAST_FUNC;
|
|
void run_applet_no_and_exit(int a, const char *name, char **argv) NORETURN FAST_FUNC;
|
|
#endif
|
|
void show_usage_if_dash_dash_help(int applet_no, char **argv) FAST_FUNC;
|
|
#if defined(__linux__)
|
|
int re_execed_comm(void) FAST_FUNC;
|
|
void set_task_comm(const char *comm) FAST_FUNC;
|
|
#else
|
|
# define re_execed_comm() 0
|
|
# define set_task_comm(name) ((void)0)
|
|
#endif
|
|
void exit_SUCCESS(void) NORETURN FAST_FUNC;
|
|
void _exit_SUCCESS(void) NORETURN FAST_FUNC;
|
|
void exit_FAILURE(void) NORETURN FAST_FUNC;
|
|
void _exit_FAILURE(void) NORETURN FAST_FUNC;
|
|
|
|
/* Helpers for daemonization.
|
|
*
|
|
* bb_daemonize(flags) = daemonize, does not compile on NOMMU
|
|
*
|
|
* bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
|
|
* rexec's itself on NOMMU with argv passed as command line.
|
|
* Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
|
|
* from the start. (It will detect it and not reexec again second time).
|
|
* You have to audit carefully that you don't do something twice as a result
|
|
* (opening files/sockets, parsing config files etc...)!
|
|
*
|
|
* Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
|
|
* (will do setsid()).
|
|
*
|
|
* fork_or_rexec(argv) = bare-bones fork on MMU,
|
|
* "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
|
|
* On MMU ignores argv.
|
|
*
|
|
* Helper for network daemons in foreground mode:
|
|
*
|
|
* bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
|
|
* to /dev/null if they are not.
|
|
*/
|
|
enum {
|
|
DAEMON_CHDIR_ROOT = 1 << 0,
|
|
DAEMON_DEVNULL_STDIO = 1 << 1,
|
|
DAEMON_CLOSE_EXTRA_FDS = 1 << 2,
|
|
DAEMON_ONLY_SANITIZE = 1 << 3, /* internal use */
|
|
//DAEMON_DOUBLE_FORK = 1 << 4, /* double fork to avoid controlling tty */
|
|
};
|
|
#if BB_MMU
|
|
enum { re_execed = 0 };
|
|
# define fork_or_rexec(argv) xfork()
|
|
# define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
|
|
# define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
|
|
#else
|
|
extern bool re_execed;
|
|
/* Note: re_exec() sets argv[0][0] |= 0x80 on NOMMU!
|
|
* _Parent_ needs to undo it if it doesn't want to have argv[0] mangled.
|
|
*/
|
|
void re_exec(char **argv) NORETURN FAST_FUNC;
|
|
pid_t fork_or_rexec(char **argv) FAST_FUNC;
|
|
int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
|
|
int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
|
|
void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
|
|
# define fork() BUG_fork_is_unavailable_on_nommu()
|
|
# define xfork() BUG_fork_is_unavailable_on_nommu()
|
|
# define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
|
|
# define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
|
|
#endif
|
|
void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
|
|
void bb_sanitize_stdio(void) FAST_FUNC;
|
|
#define bb_daemon_helper(arg) bb_daemonize_or_rexec((arg) | DAEMON_ONLY_SANITIZE, NULL)
|
|
/* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
|
|
int sanitize_env_if_suid(void) FAST_FUNC;
|
|
|
|
|
|
/* For top, ps. Some argv[i] are replaced by malloced "-opt" strings */
|
|
void make_all_argv_opts(char **argv) FAST_FUNC;
|
|
char* single_argv(char **argv) FAST_FUNC;
|
|
extern const char *const bb_argv_dash[]; /* { "-", NULL } */
|
|
extern uint32_t option_mask32;
|
|
uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
|
|
# define No_argument "\0"
|
|
# define Required_argument "\001"
|
|
# define Optional_argument "\002"
|
|
#if ENABLE_LONG_OPTS
|
|
uint32_t getopt32long(char **argv, const char *optstring, const char *longopts, ...) FAST_FUNC;
|
|
#else
|
|
#define getopt32long(argv,optstring,longopts,...) \
|
|
getopt32(argv,optstring,##__VA_ARGS__)
|
|
#endif
|
|
/* BSD-derived getopt() functions require that optind be set to 1 in
|
|
* order to reset getopt() state. This used to be generally accepted
|
|
* way of resetting getopt(). However, glibc's getopt()
|
|
* has additional getopt() state beyond optind (specifically, glibc
|
|
* extensions such as '+' and '-' at the start of the string), and requires
|
|
* that optind be set to zero to reset its state. BSD-derived versions
|
|
* of getopt() misbehaved if optind is set to 0 in order to reset getopt(),
|
|
* and glibc's getopt() used to coredump if optind is set 1 in order
|
|
* to reset getopt().
|
|
* Then BSD introduced additional variable "optreset" which should be
|
|
* set to 1 in order to reset getopt(). Sigh. Standards, anyone?
|
|
*
|
|
* By ~2008, OpenBSD 3.4 was changed to survive glibc-like optind = 0
|
|
* (to interpret it as if optreset was set).
|
|
*/
|
|
#if 1 /*def __GLIBC__*/
|
|
#define GETOPT_RESET() (optind = 0)
|
|
#else /* BSD style */
|
|
#define GETOPT_RESET() (optind = 1)
|
|
#endif
|
|
|
|
|
|
/* Having next pointer as a first member allows easy creation
|
|
* of "llist-compatible" structs, and using llist_FOO functions
|
|
* on them.
|
|
*/
|
|
typedef struct llist_t {
|
|
struct llist_t *link;
|
|
char *data;
|
|
} llist_t;
|
|
void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
|
|
void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
|
|
void *llist_pop(llist_t **elm) FAST_FUNC;
|
|
void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
|
|
void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
|
|
llist_t *llist_rev(llist_t *list) FAST_FUNC;
|
|
llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
|
|
/* BTW, surprisingly, changing API to
|
|
* llist_t *llist_add_to(llist_t *old_head, void *data)
|
|
* etc does not result in smaller code... */
|
|
|
|
/* start_stop_daemon and udhcpc are special - they want
|
|
* to create pidfiles regardless of FEATURE_PIDFILE */
|
|
#if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
|
|
/* True only if we created pidfile which is *file*, not /dev/null etc */
|
|
extern smallint wrote_pidfile;
|
|
void write_pidfile(const char *path) FAST_FUNC;
|
|
void write_pidfile_std_path_and_ext(const char *path) FAST_FUNC;
|
|
void remove_pidfile_std_path_and_ext(const char *path) FAST_FUNC;
|
|
#define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
|
|
#else
|
|
enum { wrote_pidfile = 0 };
|
|
#define write_pidfile_std_path_and_ext(path) ((void)0)
|
|
#define remove_pidfile_std_path_and_ext(path) ((void)0)
|
|
#define write_pidfile(path) ((void)0)
|
|
#define remove_pidfile(path) ((void)0)
|
|
#endif
|
|
|
|
enum {
|
|
LOGMODE_NONE = 0,
|
|
LOGMODE_STDIO = (1 << 0),
|
|
LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
|
|
LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
|
|
};
|
|
extern const char *msg_eol;
|
|
extern smallint logmode;
|
|
extern uint8_t xfunc_error_retval;
|
|
extern void (*die_func)(void);
|
|
void xfunc_die(void) NORETURN FAST_FUNC;
|
|
void bb_show_usage(void) NORETURN FAST_FUNC;
|
|
void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_error_msg(const char *s) FAST_FUNC;
|
|
void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_error_msg_and_die(const char *s) NORETURN FAST_FUNC;
|
|
void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_perror_msg(const char *s) FAST_FUNC;
|
|
void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
|
|
void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_herror_msg(const char *s) FAST_FUNC;
|
|
void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_herror_msg_and_die(const char *s) NORETURN FAST_FUNC;
|
|
void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
|
|
void bb_perror_nomsg(void) FAST_FUNC;
|
|
void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
|
|
void bb_die_memory_exhausted(void) NORETURN FAST_FUNC;
|
|
void bb_logenv_override(void) FAST_FUNC;
|
|
|
|
#if ENABLE_FEATURE_SYSLOG_INFO
|
|
void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
|
|
void bb_simple_info_msg(const char *s) FAST_FUNC;
|
|
void bb_vinfo_msg(const char *s, va_list p) FAST_FUNC;
|
|
#else
|
|
#define bb_info_msg bb_error_msg
|
|
#define bb_simple_info_msg bb_simple_error_msg
|
|
#define bb_vinfo_msg(s,p) bb_verror_msg(s,p,NULL)
|
|
#endif
|
|
|
|
#if ENABLE_WARN_SIMPLE_MSG
|
|
/* If enabled, cause calls to bb_error_msg() et al that only take a single
|
|
* parameter to generate a warning.
|
|
*/
|
|
static inline void __attribute__ ((deprecated("use bb_simple_error_msg instead")))
|
|
bb_not_simple_error_msg(const char *s) { bb_simple_error_msg(s); }
|
|
static inline void __attribute__ ((deprecated("use bb_simple_error_msg_and_die instead"))) NORETURN
|
|
bb_not_simple_error_msg_and_die(const char *s) { bb_simple_error_msg_and_die(s); }
|
|
static inline void __attribute__ ((deprecated("use bb_simple_perror_msg instead")))
|
|
bb_not_simple_perror_msg(const char *s) { bb_simple_perror_msg(s); }
|
|
static inline void __attribute__ ((deprecated("use bb_simple_perror_msg_and_die instead"))) NORETURN
|
|
bb_not_simple_perror_msg_and_die(const char *s) { bb_simple_perror_msg_and_die(s); }
|
|
static inline void __attribute__ ((deprecated("use bb_simple_herror_msg instead")))
|
|
bb_not_simple_herror_msg(const char *s) { bb_simple_herror_msg(s); }
|
|
static inline void __attribute__ ((deprecated("use bb_simple_herror_msg_and_die instead"))) NORETURN
|
|
bb_not_simple_herror_msg_and_die(const char *s) { bb_simple_herror_msg_and_die(s); }
|
|
static inline void __attribute__ ((deprecated("use bb_simple_info_msg instead")))
|
|
bb_not_simple_info_msg(const char *s) { bb_simple_info_msg(s); }
|
|
/* Override bb_error_msg() and related functions with macros that will
|
|
* substitute them for the equivalent bb_not_simple_error_msg() function when
|
|
* they are used with only a single parameter. Macro approach inspired by
|
|
* https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments and
|
|
* https://gustedt.wordpress.com/2010/06/03/default-arguments-for-c99
|
|
*/
|
|
#define _ARG18(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, ...) _17
|
|
#define BB_MSG_KIND(...) _ARG18(__VA_ARGS__, , , , , , , , , , , , , , , , , _not_simple)
|
|
#define _BB_MSG(name, kind, ...) bb##kind##name(__VA_ARGS__)
|
|
#define BB_MSG(name, kind, ...) _BB_MSG(name, kind, __VA_ARGS__)
|
|
#define bb_error_msg(...) BB_MSG(_error_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#define bb_error_msg_and_die(...) BB_MSG(_error_msg_and_die, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#define bb_perror_msg(...) BB_MSG(_perror_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#define bb_perror_msg_and_die(...) BB_MSG(_perror_msg_and_die, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#define bb_herror_msg(...) BB_MSG(_herror_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#define bb_herror_msg_and_die(...) BB_MSG(_herror_msg_and_die, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#if ENABLE_FEATURE_SYSLOG_INFO
|
|
#define bb_info_msg(...) BB_MSG(_info_msg, BB_MSG_KIND(__VA_ARGS__), __VA_ARGS__)
|
|
#endif
|
|
#endif
|
|
|
|
/* We need to export XXX_main from libbusybox
|
|
* only if we build "individual" binaries
|
|
*/
|
|
#if ENABLE_FEATURE_INDIVIDUAL
|
|
#define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
|
|
#else
|
|
#define MAIN_EXTERNALLY_VISIBLE
|
|
#endif
|
|
|
|
/* Embedded script support */
|
|
char *get_script_content(unsigned n) FAST_FUNC;
|
|
int scripted_main(int argc, char** argv) MAIN_EXTERNALLY_VISIBLE;
|
|
|
|
/* Applets which are useful from another applets */
|
|
int bb_cat(char** argv) FAST_FUNC;
|
|
int ash_main(int argc, char** argv) IF_SHELL_ASH(MAIN_EXTERNALLY_VISIBLE);
|
|
int hush_main(int argc, char** argv) IF_SHELL_HUSH(MAIN_EXTERNALLY_VISIBLE);
|
|
/* If shell needs them, they exist even if not enabled as applets */
|
|
int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
|
|
int sleep_main(int argc, char **argv) IF_SLEEP(MAIN_EXTERNALLY_VISIBLE);
|
|
/* See disabled "config ASH_SLEEP" in ash.c */
|
|
#define ENABLE_ASH_SLEEP 0
|
|
int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
|
|
int test_main(int argc, char **argv)
|
|
#if ENABLE_TEST || ENABLE_TEST1 || ENABLE_TEST2
|
|
MAIN_EXTERNALLY_VISIBLE
|
|
#endif
|
|
;
|
|
int kill_main(int argc, char **argv)
|
|
#if ENABLE_KILL || ENABLE_KILLALL || ENABLE_KILLALL5
|
|
MAIN_EXTERNALLY_VISIBLE
|
|
#endif
|
|
;
|
|
/* Similar, but used by chgrp, not shell */
|
|
int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
|
|
/* Used by ftpd */
|
|
int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
|
|
/* Don't need IF_xxx() guard for these */
|
|
int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
|
|
#if ENABLE_ROUTE
|
|
void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
|
|
#endif
|
|
|
|
struct number_state {
|
|
unsigned width;
|
|
unsigned start;
|
|
unsigned inc;
|
|
const char *sep;
|
|
const char *empty_str;
|
|
smallint all, nonempty;
|
|
};
|
|
int print_numbered_lines(struct number_state *ns, const char *filename) FAST_FUNC;
|
|
|
|
|
|
/* Networking */
|
|
/* This structure defines protocol families and their handlers. */
|
|
struct aftype {
|
|
const char *name;
|
|
const char *title;
|
|
int af;
|
|
int alen;
|
|
char* FAST_FUNC (*print)(unsigned char *);
|
|
const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
|
|
int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
|
|
void FAST_FUNC (*herror)(char *text);
|
|
int FAST_FUNC (*rprint)(int options);
|
|
int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
|
|
/* may modify src */
|
|
int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
|
|
};
|
|
/* This structure defines hardware protocols and their handlers. */
|
|
struct hwtype {
|
|
const char *name;
|
|
const char *title;
|
|
int type;
|
|
int alen;
|
|
char* FAST_FUNC (*print)(unsigned char *);
|
|
int FAST_FUNC (*input)(const char *, struct sockaddr *);
|
|
int FAST_FUNC (*activate)(int fd);
|
|
int suppress_null_addr;
|
|
};
|
|
#define IFNAME_SHOW_DOWNED_TOO ((char*)(intptr_t)1)
|
|
int display_interfaces(char *ifname) FAST_FUNC;
|
|
int in_ether(const char *bufp, struct sockaddr *sap) FAST_FUNC;
|
|
#if ENABLE_FEATURE_HWIB
|
|
int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
|
|
#else
|
|
#define in_ib(a, b) 1 /* fail */
|
|
#endif
|
|
const struct aftype *get_aftype(const char *name) FAST_FUNC;
|
|
const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
|
|
const struct hwtype *get_hwntype(int type) FAST_FUNC;
|
|
|
|
|
|
extern int fstype_matches(const char *fstype, const char *comma_list) FAST_FUNC;
|
|
#ifdef HAVE_MNTENT_H
|
|
extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
|
|
#endif
|
|
extern void erase_mtab(const char * name) FAST_FUNC;
|
|
extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
|
|
extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
|
|
#if ENABLE_DESKTOP
|
|
extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
|
|
#else
|
|
# define bb_warn_ignoring_args(arg) ((void)0)
|
|
#endif
|
|
|
|
extern int get_linux_version_code(void) FAST_FUNC;
|
|
|
|
char *query_loop(const char *device) FAST_FUNC;
|
|
int get_free_loop(void) FAST_FUNC;
|
|
int del_loop(const char *device) FAST_FUNC;
|
|
/*
|
|
* If *devname is not NULL, use that name, otherwise try to find free one,
|
|
* malloc and return it in *devname.
|
|
* return value is the opened fd to the loop device, or < on error
|
|
*/
|
|
int set_loop(char **devname, const char *file, unsigned long long offset,
|
|
unsigned long long sizelimit, unsigned flags) FAST_FUNC;
|
|
/* These constants match linux/loop.h (without BB_ prefix): */
|
|
#define BB_LO_FLAGS_READ_ONLY 1
|
|
#define BB_LO_FLAGS_AUTOCLEAR 4
|
|
#define BB_LO_FLAGS_PARTSCAN 8
|
|
|
|
/* Returns malloced str */
|
|
char *bb_ask_noecho(int fd, int timeout, const char *prompt) FAST_FUNC;
|
|
/* Like bb_ask_noecho, but asks on stdin with no timeout. */
|
|
char *bb_ask_noecho_stdin(const char *prompt) FAST_FUNC;
|
|
|
|
int bb_ask_y_confirmation_FILE(FILE *fp) FAST_FUNC;
|
|
int bb_ask_y_confirmation(void) FAST_FUNC;
|
|
|
|
/* Returns -1 if input is invalid. cur_mode is a base for e.g. "u+rw" */
|
|
int bb_parse_mode(const char* s, unsigned cur_mode) FAST_FUNC;
|
|
|
|
/*
|
|
* Config file parser
|
|
*/
|
|
enum {
|
|
PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
|
|
PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
|
|
// TODO: COLLAPSE and TRIM seem to always go in pair
|
|
PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
|
|
PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
|
|
// keep a copy of current line
|
|
PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
|
|
PARSE_EOL_COMMENTS = 0x00400000, // comments are recognized even if they aren't the first char
|
|
PARSE_ALT_COMMENTS = 0x00800000, // delim[0] and delim[1] are two different allowed comment chars
|
|
// (so far, delim[0] will only work as comment char for full-line comment)
|
|
// (IOW: it works as if PARSE_EOL_COMMENTS is not set. sysctl applet is okay with this)
|
|
PARSE_WS_COMMENTS = 0x01000000, // comments are recognized even if there is whitespace before
|
|
// ("line start><space><tab><space>#comment" is also comment, not only "line start>#comment")
|
|
// NORMAL is:
|
|
// * remove leading and trailing delimiters and collapse
|
|
// multiple delimiters into one
|
|
// * warn and continue if less than mintokens delimiters found
|
|
// * grab everything into last token
|
|
// * comments are recognized even if they aren't the first char
|
|
PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY | PARSE_EOL_COMMENTS,
|
|
};
|
|
typedef struct parser_t {
|
|
FILE *fp;
|
|
char *data;
|
|
char *line, *nline;
|
|
size_t line_alloc, nline_alloc;
|
|
int lineno;
|
|
} parser_t;
|
|
parser_t* config_open(const char *filename) FAST_FUNC;
|
|
parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
|
|
/* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */
|
|
int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
|
|
#define config_read(parser, tokens, max, min, str, flags) \
|
|
config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
|
|
void config_close(parser_t *parser) FAST_FUNC;
|
|
|
|
/* Concatenate path and filename to new allocated buffer.
|
|
* Add "/" only as needed (no duplicate "//" are produced).
|
|
* If path is NULL, it is assumed to be "/".
|
|
* filename should not be NULL. */
|
|
char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
|
|
/* Returns NULL on . and .. */
|
|
char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
|
|
|
|
|
|
int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
|
|
|
|
int get_signum(const char *name) FAST_FUNC;
|
|
const char *get_signame(int number) FAST_FUNC;
|
|
void print_signames(void) FAST_FUNC;
|
|
|
|
char *bb_simplify_path(const char *path) FAST_FUNC;
|
|
/* Returns ptr to NUL */
|
|
char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
|
|
|
|
void pause_after_failed_login(void) FAST_FUNC;
|
|
void bb_do_delay(unsigned seconds) FAST_FUNC;
|
|
void msleep(unsigned ms) FAST_FUNC;
|
|
void sleep1(void) FAST_FUNC;
|
|
void change_identity(const struct passwd *pw) FAST_FUNC;
|
|
void exec_shell(const char *shell, int loginshell, const char **args) NORETURN FAST_FUNC;
|
|
void exec_login_shell(const char *shell) NORETURN FAST_FUNC;
|
|
void exec_prog_or_SHELL(char **argv) NORETURN FAST_FUNC;
|
|
|
|
/* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL.
|
|
* Note that getpwuid result might need xstrdup'ing
|
|
* if there is a possibility of intervening getpwxxx() calls.
|
|
*/
|
|
const char *get_shell_name(void) FAST_FUNC;
|
|
|
|
#if ENABLE_FEATURE_SETPRIV_CAPABILITIES || ENABLE_RUN_INIT
|
|
unsigned cap_name_to_number(const char *cap) FAST_FUNC;
|
|
void printf_cap(const char *pfx, unsigned cap_no) FAST_FUNC;
|
|
void drop_capability(int cap_ordinal) FAST_FUNC;
|
|
/* Structures inside "struct caps" are Linux-specific and libcap-specific: */
|
|
#define DEFINE_STRUCT_CAPS \
|
|
struct caps { \
|
|
struct __user_cap_header_struct header; \
|
|
unsigned u32s; \
|
|
struct __user_cap_data_struct data[2]; \
|
|
}
|
|
void getcaps(void *caps) FAST_FUNC;
|
|
#endif
|
|
|
|
#if ENABLE_SELINUX
|
|
extern void renew_current_security_context(void) FAST_FUNC;
|
|
extern void set_current_security_context(security_context_t sid) FAST_FUNC;
|
|
extern context_t set_security_context_component(security_context_t cur_context,
|
|
char *user, char *role, char *type, char *range) FAST_FUNC;
|
|
extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
|
|
extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
|
|
#else
|
|
#define selinux_preserve_fcontext(fdesc) ((void)0)
|
|
#endif
|
|
extern void selinux_or_die(void) FAST_FUNC;
|
|
|
|
|
|
/* setup_environment:
|
|
* if SETUP_ENV_CHDIR:
|
|
* if cd(pw->pw_dir): ok: else if SETUP_ENV_TO_TMP: cd(/tmp) else: cd(/) or die
|
|
* if SETUP_ENV_CLEARENV: cd(pw->pw_dir), clear environment, then set
|
|
* TERM=(old value)
|
|
* USER=pw->pw_name, LOGNAME=pw->pw_name
|
|
* PATH=bb_default_[root_]path
|
|
* HOME=pw->pw_dir
|
|
* SHELL=shell
|
|
* else if SETUP_ENV_CHANGEENV | SETUP_ENV_CHANGEENV_LOGNAME:
|
|
* if not root (if pw->pw_uid != 0) or if SETUP_ENV_CHANGEENV_LOGNAME:
|
|
* USER=pw->pw_name, LOGNAME=pw->pw_name
|
|
* HOME=pw->pw_dir
|
|
* SHELL=shell
|
|
* else does nothing
|
|
*
|
|
* NB: CHANGEENV and CLEARENV use setenv() - this leaks memory!
|
|
* If setup_environment() is used is vforked child, this leaks memory _in parent too_!
|
|
*/
|
|
#define SETUP_ENV_CHANGEENV (1 << 0)
|
|
#define SETUP_ENV_CHANGEENV_LOGNAME (1 << 1)
|
|
#define SETUP_ENV_CLEARENV (1 << 2)
|
|
#define SETUP_ENV_TO_TMP (1 << 3)
|
|
#define SETUP_ENV_CHDIR (1 << 4)
|
|
void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
|
|
void nuke_str(char *str) FAST_FUNC;
|
|
#if ENABLE_FEATURE_SECURETTY && !ENABLE_PAM
|
|
int is_tty_secure(const char *short_tty) FAST_FUNC;
|
|
#else
|
|
static ALWAYS_INLINE int is_tty_secure(const char *short_tty UNUSED_PARAM) { return 1; }
|
|
#endif
|
|
#define CHECKPASS_PW_HAS_EMPTY_PASSWORD 2
|
|
int check_password(const struct passwd *pw, const char *plaintext) FAST_FUNC;
|
|
int ask_and_check_password_extended(const struct passwd *pw, int timeout, const char *prompt) FAST_FUNC;
|
|
int ask_and_check_password(const struct passwd *pw) FAST_FUNC;
|
|
/* Returns a malloced string */
|
|
#if !ENABLE_USE_BB_CRYPT
|
|
#define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
|
|
#endif
|
|
extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
|
|
extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
|
|
/*
|
|
* rnd is additional random input. New one is returned.
|
|
* Useful if you call crypt_make_salt many times in a row:
|
|
* rnd = crypt_make_salt(buf1, 4, 0);
|
|
* rnd = crypt_make_salt(buf2, 4, rnd);
|
|
* rnd = crypt_make_salt(buf3, 4, rnd);
|
|
* (otherwise we risk having same salt generated)
|
|
*/
|
|
extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC;
|
|
/* "$N$" + sha_salt_16_bytes + NUL */
|
|
#define MAX_PW_SALT_LEN (3 + 16 + 1)
|
|
extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC;
|
|
|
|
|
|
/* Returns number of lines changed, or -1 on error */
|
|
#if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
|
|
#define update_passwd(filename, username, data, member) \
|
|
update_passwd(filename, username, data)
|
|
#endif
|
|
extern int update_passwd(const char *filename,
|
|
const char *username,
|
|
const char *data,
|
|
const char *member) FAST_FUNC;
|
|
|
|
int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
|
|
int index_in_strings(const char *strings, const char *key) FAST_FUNC;
|
|
int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
|
|
int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
|
|
const char *nth_string(const char *strings, int n) FAST_FUNC;
|
|
|
|
extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
|
|
extern void print_login_prompt(void) FAST_FUNC;
|
|
|
|
char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
|
|
int is_TERM_dumb(void) FAST_FUNC;
|
|
/* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
|
|
int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
|
|
int get_terminal_width(int fd) FAST_FUNC;
|
|
|
|
int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
|
|
#define TERMIOS_CLEAR_ISIG (1 << 0)
|
|
#define TERMIOS_RAW_CRNL_INPUT (1 << 1)
|
|
#define TERMIOS_RAW_CRNL_OUTPUT (1 << 2)
|
|
#define TERMIOS_RAW_CRNL (TERMIOS_RAW_CRNL_INPUT|TERMIOS_RAW_CRNL_OUTPUT)
|
|
#define TERMIOS_RAW_INPUT (1 << 3)
|
|
int get_termios_and_make_raw(int fd, struct termios *newterm, struct termios *oldterm, int flags) FAST_FUNC;
|
|
int set_termios_to_raw(int fd, struct termios *oldterm, int flags) FAST_FUNC;
|
|
|
|
/* NB: "unsigned request" is crucial! "int request" will break some arches! */
|
|
int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
|
|
int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
|
|
#if ENABLE_IOCTL_HEX2STR_ERROR
|
|
int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
|
|
int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
|
|
#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
|
|
#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
|
|
#else
|
|
int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
|
|
int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
|
|
#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
|
|
#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
|
|
#endif
|
|
|
|
char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
|
|
void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
|
|
void reset_ino_dev_hashtable(void) FAST_FUNC;
|
|
#ifdef __GLIBC__
|
|
/* At least glibc has horrendously large inline for this, so wrap it */
|
|
unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC;
|
|
#undef makedev
|
|
#define makedev(a,b) bb_makedev(a,b)
|
|
#endif
|
|
|
|
|
|
/* "Keycodes" that report an escape sequence.
|
|
* We use something which fits into signed char,
|
|
* yet doesn't represent any valid Unicode character.
|
|
* Also, -1 is reserved for error indication and we don't use it. */
|
|
enum {
|
|
KEYCODE_UP = -2,
|
|
KEYCODE_DOWN = -3,
|
|
KEYCODE_RIGHT = -4,
|
|
KEYCODE_LEFT = -5,
|
|
KEYCODE_HOME = -6,
|
|
KEYCODE_END = -7,
|
|
KEYCODE_INSERT = -8,
|
|
KEYCODE_DELETE = -9,
|
|
KEYCODE_PAGEUP = -10,
|
|
KEYCODE_PAGEDOWN = -11,
|
|
KEYCODE_BACKSPACE = -12, /* Used only if Alt/Ctrl/Shifted */
|
|
KEYCODE_D = -13, /* Used only if Alted */
|
|
#if 0
|
|
KEYCODE_FUN1 = ,
|
|
KEYCODE_FUN2 = ,
|
|
KEYCODE_FUN3 = ,
|
|
KEYCODE_FUN4 = ,
|
|
KEYCODE_FUN5 = ,
|
|
KEYCODE_FUN6 = ,
|
|
KEYCODE_FUN7 = ,
|
|
KEYCODE_FUN8 = ,
|
|
KEYCODE_FUN9 = ,
|
|
KEYCODE_FUN10 = ,
|
|
KEYCODE_FUN11 = ,
|
|
KEYCODE_FUN12 = ,
|
|
#endif
|
|
/* ^^^^^ Be sure that last defined value is small enough.
|
|
* Current read_key() code allows going up to -32 (0xfff..fffe0).
|
|
* This gives three upper bits in LSB to play with:
|
|
* KEYCODE_foo values are 0xfff..fffXX, lowest XX bits are: scavvvvv,
|
|
* s=0 if SHIFT, c=0 if CTRL, a=0 if ALT,
|
|
* vvvvv bits are the same for same key regardless of "shift bits".
|
|
*/
|
|
//KEYCODE_SHIFT_... = KEYCODE_... & ~0x80,
|
|
KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
|
|
KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
|
|
KEYCODE_ALT_RIGHT = KEYCODE_RIGHT & ~0x20,
|
|
KEYCODE_ALT_LEFT = KEYCODE_LEFT & ~0x20,
|
|
KEYCODE_ALT_BACKSPACE = KEYCODE_BACKSPACE & ~0x20,
|
|
KEYCODE_ALT_D = KEYCODE_D & ~0x20,
|
|
|
|
KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
|
|
/* How long is the longest ESC sequence we know?
|
|
* We want it big enough to be able to contain
|
|
* cursor position sequence "ESC [ 9999 ; 9999 R"
|
|
*/
|
|
KEYCODE_BUFFER_SIZE = 16
|
|
};
|
|
/* Note: fd may be in blocking or non-blocking mode, both make sense.
|
|
* For one, less uses non-blocking mode.
|
|
* Only the first read syscall inside read_key may block indefinitely
|
|
* (unless fd is in non-blocking mode),
|
|
* subsequent reads will time out after a few milliseconds.
|
|
* Return of -1 means EOF or error (errno == 0 on EOF).
|
|
* Nonzero errno is not preserved across the call:
|
|
* if there was no error, errno will be cleared to 0.
|
|
* buffer[0] is used as a counter of buffered chars and must be 0
|
|
* on first call.
|
|
* timeout:
|
|
* -2: do not poll(-1) for input - read() it, return on EAGAIN at once
|
|
* -1: poll(-1) (i.e. block even on NONBLOCKed fd)
|
|
* >=0: poll() for TIMEOUT milliseconds, return -1/EAGAIN on timeout
|
|
*/
|
|
int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
|
|
/* This version loops on EINTR: */
|
|
int64_t safe_read_key(int fd, char *buffer, int timeout) FAST_FUNC;
|
|
void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
|
|
|
|
|
|
#if ENABLE_FEATURE_EDITING
|
|
/* It's NOT just ENABLEd or disabled. It's a number: */
|
|
# if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0
|
|
# define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
|
|
unsigned size_from_HISTFILESIZE(const char *hp) FAST_FUNC;
|
|
# else
|
|
# define MAX_HISTORY 0
|
|
# endif
|
|
typedef const char *get_exe_name_t(int i) FAST_FUNC;
|
|
typedef const char *sh_get_var_t(const char *name) FAST_FUNC;
|
|
typedef struct line_input_t {
|
|
int flags;
|
|
int timeout;
|
|
# if ENABLE_FEATURE_TAB_COMPLETION
|
|
# if ENABLE_SHELL_ASH
|
|
const char *path_lookup;
|
|
# define EDITING_HAS_path_lookup 1
|
|
# else
|
|
# define EDITING_HAS_path_lookup 0
|
|
# endif
|
|
# if ENABLE_SHELL_ASH || ENABLE_SHELL_HUSH
|
|
/* function to fetch additional application-specific names to match */
|
|
get_exe_name_t *get_exe_name;
|
|
# endif
|
|
# endif
|
|
# if (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT) \
|
|
&& (ENABLE_SHELL_ASH || ENABLE_SHELL_HUSH)
|
|
/* function to fetch value of shell variable */
|
|
sh_get_var_t *sh_get_var;
|
|
# define EDITING_HAS_sh_get_var 1
|
|
# else
|
|
# define EDITING_HAS_sh_get_var 0
|
|
# endif
|
|
# if MAX_HISTORY
|
|
int cnt_history;
|
|
int cur_history;
|
|
int max_history; /* must never be <= 0 */
|
|
# if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
|
/* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
|
|
* if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
|
|
* in on-disk history"
|
|
* if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are
|
|
* also in on-disk history (and thus need to be skipped on save)"
|
|
*/
|
|
unsigned cnt_history_in_file;
|
|
const char *hist_file;
|
|
# endif
|
|
char *history[MAX_HISTORY + 1];
|
|
# endif
|
|
} line_input_t;
|
|
enum {
|
|
DO_HISTORY = 1 * (MAX_HISTORY > 0),
|
|
TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION,
|
|
USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION,
|
|
VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI,
|
|
WITH_PATH_LOOKUP = 0x10,
|
|
LI_INTERRUPTIBLE = 0x20,
|
|
FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION | LI_INTERRUPTIBLE,
|
|
};
|
|
line_input_t *new_line_input_t(int flags) FAST_FUNC;
|
|
#if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
|
void free_line_input_t(line_input_t *n) FAST_FUNC;
|
|
#else
|
|
# define free_line_input_t(n) free(n)
|
|
#endif
|
|
/*
|
|
* maxsize must be >= 2.
|
|
* Returns:
|
|
* -1 on read errors or EOF, or on bare Ctrl-D,
|
|
* 0 on ctrl-C (the line entered is still returned in 'command'),
|
|
* >0 length of input string, including terminating '\n'
|
|
*/
|
|
int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize) FAST_FUNC;
|
|
void show_history(const line_input_t *st) FAST_FUNC;
|
|
# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
|
|
void save_history(line_input_t *st);
|
|
# endif
|
|
#else
|
|
#define MAX_HISTORY 0
|
|
int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
|
|
#define read_line_input(state, prompt, command, maxsize) \
|
|
read_line_input(prompt, command, maxsize)
|
|
#endif
|
|
|
|
#ifndef COMM_LEN
|
|
# ifdef TASK_COMM_LEN
|
|
enum { COMM_LEN = TASK_COMM_LEN };
|
|
# else
|
|
/* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
|
|
enum { COMM_LEN = 16 };
|
|
# endif
|
|
#endif
|
|
|
|
struct smaprec {
|
|
unsigned long mapped_rw;
|
|
unsigned long mapped_ro;
|
|
unsigned long shared_clean;
|
|
unsigned long shared_dirty;
|
|
unsigned long private_clean;
|
|
unsigned long private_dirty;
|
|
unsigned long stack;
|
|
unsigned long smap_pss, smap_swap;
|
|
unsigned long smap_size;
|
|
// For mixed 32/64 userspace, 32-bit pmap still needs
|
|
// 64-bit field here to correctly show 64-bit processes:
|
|
unsigned long long smap_start;
|
|
// (strictly speaking, other fields need to be wider too,
|
|
// but they are in kbytes, not bytes, and they hold sizes,
|
|
// not start addresses, sizes tend to be less than 4 terabytes)
|
|
char smap_mode[5];
|
|
char *smap_name;
|
|
};
|
|
|
|
#if !ENABLE_PMAP
|
|
#define procps_read_smaps(pid, total, cb, data) \
|
|
procps_read_smaps(pid, total)
|
|
#endif
|
|
int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
|
|
void (*cb)(struct smaprec *, void *), void *data);
|
|
|
|
typedef struct procps_status_t {
|
|
DIR *dir;
|
|
IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
|
|
uint8_t shift_pages_to_bytes;
|
|
uint8_t shift_pages_to_kb;
|
|
/* Fields are set to 0/NULL if failed to determine (or not requested) */
|
|
uint16_t argv_len;
|
|
char *argv0;
|
|
char *exe;
|
|
IF_SELINUX(char *context;)
|
|
IF_FEATURE_SHOW_THREADS(unsigned main_thread_pid;)
|
|
/* Everything below must contain no ptrs to malloc'ed data:
|
|
* it is memset(0) for each process in procps_scan() */
|
|
unsigned long vsz, rss; /* we round it to kbytes */
|
|
unsigned long stime, utime;
|
|
unsigned long start_time;
|
|
unsigned pid;
|
|
unsigned ppid;
|
|
unsigned pgid;
|
|
unsigned sid;
|
|
unsigned uid;
|
|
unsigned gid;
|
|
#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
|
|
unsigned ruid;
|
|
unsigned rgid;
|
|
int niceness;
|
|
#endif
|
|
unsigned tty_major,tty_minor;
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
struct smaprec smaps;
|
|
#endif
|
|
char state[4];
|
|
/* basename of executable in exec(2), read from /proc/N/stat
|
|
* (if executable is symlink or script, it is NOT replaced
|
|
* by link target or interpreter name) */
|
|
char comm[COMM_LEN];
|
|
/* user/group? - use passwd/group parsing functions */
|
|
#if ENABLE_FEATURE_TOP_SMP_PROCESS
|
|
int last_seen_on_cpu;
|
|
#endif
|
|
} procps_status_t;
|
|
/* flag bits for procps_scan(xx, flags) calls */
|
|
enum {
|
|
PSSCAN_PID = 1 << 0,
|
|
PSSCAN_PPID = 1 << 1,
|
|
PSSCAN_PGID = 1 << 2,
|
|
PSSCAN_SID = 1 << 3,
|
|
PSSCAN_UIDGID = 1 << 4,
|
|
PSSCAN_COMM = 1 << 5,
|
|
/* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
|
|
PSSCAN_ARGV0 = 1 << 7,
|
|
PSSCAN_EXE = 1 << 8,
|
|
PSSCAN_STATE = 1 << 9,
|
|
PSSCAN_VSZ = 1 << 10,
|
|
PSSCAN_RSS = 1 << 11,
|
|
PSSCAN_STIME = 1 << 12,
|
|
PSSCAN_UTIME = 1 << 13,
|
|
PSSCAN_TTY = 1 << 14,
|
|
PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
|
|
/* NB: used by find_pid_by_name(). Any applet using it
|
|
* needs to be mentioned here. */
|
|
PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
|
|
|| ENABLE_PGREP || ENABLE_PKILL
|
|
|| ENABLE_PIDOF
|
|
|| ENABLE_SESTATUS
|
|
),
|
|
PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
|
|
PSSCAN_START_TIME = 1 << 18,
|
|
PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
|
|
PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
|
|
PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
|
|
PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
|
|
};
|
|
//procps_status_t* alloc_procps_scan(void) FAST_FUNC;
|
|
void free_procps_scan(procps_status_t* sp) FAST_FUNC;
|
|
procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
|
|
/* Format cmdline (up to col chars) into char buf[size] */
|
|
/* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
|
|
void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
|
|
pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
|
|
pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
|
|
int starts_with_cpu(const char *str) FAST_FUNC;
|
|
unsigned get_cpu_count(void) FAST_FUNC;
|
|
|
|
|
|
/* Use strict=1 if you process input from untrusted source:
|
|
* it will return NULL on invalid %xx (bad hex chars)
|
|
* and str + 1 if decoded char is / or NUL.
|
|
* In non-strict mode, it always succeeds (returns str),
|
|
* and also it additionally decoded '+' to space.
|
|
*/
|
|
char *percent_decode_in_place(char *str, int strict) FAST_FUNC;
|
|
|
|
|
|
extern const char bb_uuenc_tbl_base64[] ALIGN1;
|
|
extern const char bb_uuenc_tbl_base32[] ALIGN1;
|
|
extern const char bb_uuenc_tbl_std[] ALIGN1;
|
|
void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
|
|
enum {
|
|
BASE64_FLAG_UU_STOP = 0x100,
|
|
BASE64_32 = 0x200, /* base32 */
|
|
/* Sign-extends to a value which never matches fgetc result: */
|
|
BASE64_FLAG_NO_STOP_CHAR = 0x80,
|
|
};
|
|
char *decode_base64(char *dst, const char **pp_src) FAST_FUNC;
|
|
char *decode_base32(char *dst, const char **pp_src) FAST_FUNC;
|
|
void read_base64(FILE *src_stream, FILE *dst_stream, int flags) FAST_FUNC;
|
|
|
|
typedef struct md5_ctx_t {
|
|
uint8_t wbuffer[64]; /* always correctly aligned for uint64_t */
|
|
void (*process_block)(struct md5_ctx_t*) FAST_FUNC;
|
|
uint64_t total64; /* must be directly before hash[] */
|
|
uint32_t hash[8]; /* 4 elements for md5, 5 for sha1, 8 for sha256 */
|
|
} md5_ctx_t;
|
|
typedef struct md5_ctx_t sha1_ctx_t;
|
|
typedef struct md5_ctx_t sha256_ctx_t;
|
|
typedef struct sha512_ctx_t {
|
|
uint64_t total64[2]; /* must be directly before hash[] */
|
|
uint64_t hash[8];
|
|
uint8_t wbuffer[128]; /* always correctly aligned for uint64_t */
|
|
} sha512_ctx_t;
|
|
typedef struct sha3_ctx_t {
|
|
uint64_t state[25];
|
|
unsigned bytes_queued;
|
|
unsigned input_block_bytes;
|
|
} sha3_ctx_t;
|
|
void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
|
|
void md5_hash(md5_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
|
|
unsigned md5_end(md5_ctx_t *ctx, void *resbuf) FAST_FUNC;
|
|
void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
|
|
#define sha1_hash md5_hash
|
|
unsigned sha1_end(sha1_ctx_t *ctx, void *resbuf) FAST_FUNC;
|
|
void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
|
|
#define sha256_hash md5_hash
|
|
#define sha256_end sha1_end
|
|
void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
|
|
void sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
|
|
unsigned sha512_end(sha512_ctx_t *ctx, void *resbuf) FAST_FUNC;
|
|
void sha3_begin(sha3_ctx_t *ctx) FAST_FUNC;
|
|
void sha3_hash(sha3_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
|
|
unsigned sha3_end(sha3_ctx_t *ctx, void *resbuf) FAST_FUNC;
|
|
/* TLS benefits from knowing that sha1 and sha256 share these. Give them "agnostic" names too */
|
|
typedef struct md5_ctx_t md5sha_ctx_t;
|
|
#define md5sha_hash md5_hash
|
|
#define sha_end sha1_end
|
|
enum {
|
|
MD5_OUTSIZE = 16,
|
|
SHA1_OUTSIZE = 20,
|
|
SHA256_OUTSIZE = 32,
|
|
SHA512_OUTSIZE = 64,
|
|
SHA3_OUTSIZE = 28,
|
|
};
|
|
|
|
extern uint32_t *global_crc32_table;
|
|
uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
|
|
uint32_t *crc32_new_table_le(void) FAST_FUNC;
|
|
uint32_t *global_crc32_new_table_le(void) FAST_FUNC;
|
|
uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
|
|
uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
|
|
|
|
typedef struct masks_labels_t {
|
|
const char *labels;
|
|
const int masks[];
|
|
} masks_labels_t;
|
|
int print_flags_separated(const int *masks, const char *labels,
|
|
int flags, const char *separator) FAST_FUNC;
|
|
int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
|
|
|
|
typedef struct bb_progress_t {
|
|
unsigned last_size;
|
|
unsigned last_update_sec;
|
|
unsigned last_change_sec;
|
|
unsigned start_sec;
|
|
/*unsigned last_eta;*/
|
|
const char *curfile;
|
|
} bb_progress_t;
|
|
|
|
#define is_bb_progress_inited(p) ((p)->curfile != NULL)
|
|
#define bb_progress_free(p) do { \
|
|
if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \
|
|
(p)->curfile = NULL; \
|
|
} while (0)
|
|
void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC;
|
|
int bb_progress_update(bb_progress_t *p,
|
|
uoff_t beg_range,
|
|
uoff_t transferred,
|
|
uoff_t totalsize) FAST_FUNC;
|
|
|
|
unsigned ubi_devnum_from_devname(const char *str) FAST_FUNC;
|
|
int ubi_get_volid_by_name(unsigned ubi_devnum, const char *vol_name) FAST_FUNC;
|
|
|
|
|
|
extern const char *applet_name;
|
|
|
|
/* Some older linkers don't perform string merging, we used to have common strings
|
|
* as global arrays to do it by hand. But:
|
|
* (1) newer linkers do it themselves,
|
|
* (2) however, they DONT merge string constants with global arrays,
|
|
* even if the value is the same (!). Thus global arrays actually
|
|
* increased size a bit: for example, "/etc/passwd" string from libc
|
|
* wasn't merged with bb_path_passwd_file[] array!
|
|
* Therefore now we use #defines.
|
|
*/
|
|
/* "BusyBox vN.N.N (timestamp or extra_version)" */
|
|
extern const char bb_banner[] ALIGN1;
|
|
extern const char bb_msg_memory_exhausted[] ALIGN1;
|
|
extern const char bb_msg_invalid_date[] ALIGN1;
|
|
#define bb_msg_read_error "read error"
|
|
#define bb_msg_write_error "write error"
|
|
extern const char bb_msg_unknown[] ALIGN1;
|
|
extern const char bb_msg_can_not_create_raw_socket[] ALIGN1;
|
|
extern const char bb_msg_perm_denied_are_you_root[] ALIGN1;
|
|
extern const char bb_msg_you_must_be_root[] ALIGN1;
|
|
extern const char bb_msg_requires_arg[] ALIGN1;
|
|
extern const char bb_msg_invalid_arg_to[] ALIGN1;
|
|
extern const char bb_msg_standard_input[] ALIGN1;
|
|
extern const char bb_msg_standard_output[] ALIGN1;
|
|
|
|
/* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
|
|
extern const char bb_hexdigits_upcase[] ALIGN1;
|
|
|
|
extern const char bb_path_wtmp_file[] ALIGN1;
|
|
|
|
/* Busybox mount uses either /proc/mounts or /etc/mtab to
|
|
* get the list of currently mounted filesystems */
|
|
#define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts")
|
|
|
|
#define bb_path_passwd_file _PATH_PASSWD
|
|
#define bb_path_group_file _PATH_GROUP
|
|
#define bb_path_shadow_file _PATH_SHADOW
|
|
#define bb_path_gshadow_file _PATH_GSHADOW
|
|
|
|
#define bb_path_motd_file "/etc/motd"
|
|
|
|
#define bb_dev_null "/dev/null"
|
|
extern const char bb_busybox_exec_path[] ALIGN1;
|
|
/* allow default system PATH to be extended via CFLAGS */
|
|
#ifndef BB_ADDITIONAL_PATH
|
|
#define BB_ADDITIONAL_PATH ""
|
|
#endif
|
|
#define BB_PATH_ROOT_PATH "PATH=/sbin:/usr/sbin:/bin:/usr/bin" BB_ADDITIONAL_PATH
|
|
extern const char bb_PATH_root_path[] ALIGN1; /* BB_PATH_ROOT_PATH */
|
|
#define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
|
|
/* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
|
|
* but I want to save a few bytes here:
|
|
*/
|
|
#define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
|
|
|
|
extern const int const_int_0;
|
|
//extern const int const_int_1;
|
|
|
|
|
|
/* This struct is deliberately not defined. */
|
|
/* See docs/keep_data_small.txt */
|
|
struct globals;
|
|
/* '*const' ptr makes gcc optimize code much better.
|
|
* Magic prevents ptr_to_globals from going into rodata.
|
|
* If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
|
|
extern struct globals *BB_GLOBAL_CONST ptr_to_globals;
|
|
|
|
#define barrier() asm volatile ("":::"memory")
|
|
|
|
#if defined(__clang_major__) && __clang_major__ >= 9
|
|
/* Clang/llvm drops assignment to "constant" storage. Silently.
|
|
* Needs serious convincing to not eliminate the store.
|
|
*/
|
|
static ALWAYS_INLINE void* not_const_pp(const void *p)
|
|
{
|
|
void *pp;
|
|
asm volatile (
|
|
"# forget that p points to const"
|
|
: /*outputs*/ "=r" (pp)
|
|
: /*inputs*/ "0" (p)
|
|
);
|
|
return pp;
|
|
}
|
|
# define ASSIGN_CONST_PTR(pptr, v) do { \
|
|
*(void**)not_const_pp(pptr) = (void*)(v); \
|
|
barrier(); \
|
|
} while (0)
|
|
/* XZALLOC_CONST_PTR() is an out-of-line function to prevent
|
|
* clang from reading pointer before it is assigned.
|
|
*/
|
|
void XZALLOC_CONST_PTR(const void *pptr, size_t size) FAST_FUNC;
|
|
#else
|
|
# define ASSIGN_CONST_PTR(pptr, v) do { \
|
|
*(void**)(pptr) = (void*)(v); \
|
|
/* At least gcc 3.4.6 on mipsel needs optimization barrier */ \
|
|
barrier(); \
|
|
} while (0)
|
|
# define XZALLOC_CONST_PTR(pptr, size) ASSIGN_CONST_PTR(pptr, xzalloc(size))
|
|
#endif
|
|
|
|
#define SET_PTR_TO_GLOBALS(x) ASSIGN_CONST_PTR(&ptr_to_globals, x)
|
|
#define FREE_PTR_TO_GLOBALS() do { \
|
|
if (ENABLE_FEATURE_CLEAN_UP) { \
|
|
free(ptr_to_globals); \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
|
|
* use bb_default_login_shell and following defines.
|
|
* If you change LIBBB_DEFAULT_LOGIN_SHELL,
|
|
* don't forget to change increment constant. */
|
|
#define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
|
|
extern const char bb_default_login_shell[] ALIGN1;
|
|
/* "/bin/sh" */
|
|
#define DEFAULT_SHELL (bb_default_login_shell+1)
|
|
/* "sh" */
|
|
#define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
|
|
|
|
/* The following devices are the same on all systems. */
|
|
#define CURRENT_TTY "/dev/tty"
|
|
#define DEV_CONSOLE "/dev/console"
|
|
|
|
#if defined(__FreeBSD_kernel__)
|
|
# define CURRENT_VC CURRENT_TTY
|
|
# define VC_1 "/dev/ttyv0"
|
|
# define VC_2 "/dev/ttyv1"
|
|
# define VC_3 "/dev/ttyv2"
|
|
# define VC_4 "/dev/ttyv3"
|
|
# define VC_5 "/dev/ttyv4"
|
|
# define VC_FORMAT "/dev/ttyv%d"
|
|
#elif defined(__GNU__)
|
|
# define CURRENT_VC CURRENT_TTY
|
|
# define VC_1 "/dev/tty1"
|
|
# define VC_2 "/dev/tty2"
|
|
# define VC_3 "/dev/tty3"
|
|
# define VC_4 "/dev/tty4"
|
|
# define VC_5 "/dev/tty5"
|
|
# define VC_FORMAT "/dev/tty%d"
|
|
#elif ENABLE_FEATURE_DEVFS
|
|
/*Linux, obsolete devfs names */
|
|
# define CURRENT_VC "/dev/vc/0"
|
|
# define VC_1 "/dev/vc/1"
|
|
# define VC_2 "/dev/vc/2"
|
|
# define VC_3 "/dev/vc/3"
|
|
# define VC_4 "/dev/vc/4"
|
|
# define VC_5 "/dev/vc/5"
|
|
# define VC_FORMAT "/dev/vc/%d"
|
|
# define LOOP_FORMAT "/dev/loop/%u"
|
|
# define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
|
|
# define LOOP_NAME "/dev/loop/"
|
|
# define FB_0 "/dev/fb/0"
|
|
#else
|
|
/*Linux, normal names */
|
|
# define CURRENT_VC "/dev/tty0"
|
|
# define VC_1 "/dev/tty1"
|
|
# define VC_2 "/dev/tty2"
|
|
# define VC_3 "/dev/tty3"
|
|
# define VC_4 "/dev/tty4"
|
|
# define VC_5 "/dev/tty5"
|
|
# define VC_FORMAT "/dev/tty%d"
|
|
# define LOOP_FORMAT "/dev/loop%u"
|
|
# define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
|
|
# define LOOP_NAME "/dev/loop"
|
|
# define FB_0 "/dev/fb0"
|
|
#endif
|
|
|
|
// storage helpers for mk*fs utilities
|
|
char BUG_wrong_field_size(void);
|
|
#define STORE_LE(field, value) \
|
|
do { \
|
|
if (sizeof(field) == 4) \
|
|
field = SWAP_LE32((uint32_t)(value)); \
|
|
else if (sizeof(field) == 2) \
|
|
field = SWAP_LE16((uint16_t)(value)); \
|
|
else if (sizeof(field) == 1) \
|
|
field = (uint8_t)(value); \
|
|
else \
|
|
BUG_wrong_field_size(); \
|
|
} while (0)
|
|
|
|
#define FETCH_LE32(field) \
|
|
(sizeof(field) == 4 ? SWAP_LE32(field) : BUG_wrong_field_size())
|
|
|
|
|
|
#define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
|
|
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
|
|
|
|
|
|
/* We redefine ctype macros. Unicode-correct handling of char types
|
|
* can't be done with such byte-oriented operations anyway,
|
|
* we don't lose anything.
|
|
*/
|
|
#undef isalnum
|
|
#undef isalpha
|
|
#undef isascii
|
|
#undef isblank
|
|
#undef iscntrl
|
|
#undef isdigit
|
|
#undef isgraph
|
|
#undef islower
|
|
#undef isprint
|
|
#undef ispunct
|
|
#undef isspace
|
|
#undef isupper
|
|
#undef isxdigit
|
|
#undef toupper
|
|
#undef tolower
|
|
|
|
/* We save ~500 bytes on isdigit alone.
|
|
* BTW, x86 likes (unsigned char) cast more than (unsigned). */
|
|
|
|
/* These work the same for ASCII and Unicode,
|
|
* assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
|
|
#define isascii(a) ((unsigned char)(a) <= 0x7f)
|
|
#define isdigit(a) ((unsigned char)((a) - '0') <= 9)
|
|
#define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
|
|
#define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
|
|
#define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
|
|
#define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
|
|
#define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
|
|
/* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
|
|
* "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
|
|
*/
|
|
#define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
|
|
// Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
|
|
#define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
|
|
// Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
|
|
#define isalnum(a) bb_ascii_isalnum(a)
|
|
static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
|
|
{
|
|
unsigned char b = a - '0';
|
|
if (b <= 9)
|
|
return (b <= 9);
|
|
b = (a|0x20) - 'a';
|
|
return b <= 'z' - 'a';
|
|
}
|
|
#define isxdigit(a) bb_ascii_isxdigit(a)
|
|
static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
|
|
{
|
|
unsigned char b = a - '0';
|
|
if (b <= 9)
|
|
return (b <= 9);
|
|
b = (a|0x20) - 'a';
|
|
return b <= 'f' - 'a';
|
|
}
|
|
#define toupper(a) bb_ascii_toupper(a)
|
|
static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
|
|
{
|
|
unsigned char b = a - 'a';
|
|
if (b <= ('z' - 'a'))
|
|
a -= 'a' - 'A';
|
|
return a;
|
|
}
|
|
#define tolower(a) bb_ascii_tolower(a)
|
|
static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
|
|
{
|
|
unsigned char b = a - 'A';
|
|
if (b <= ('Z' - 'A'))
|
|
a += 'a' - 'A';
|
|
return a;
|
|
}
|
|
|
|
/* In ASCII and Unicode, these are likely to be very different.
|
|
* Let's prevent ambiguous usage from the start */
|
|
#define isgraph(a) isgraph_is_ambiguous_dont_use(a)
|
|
#define isprint(a) isprint_is_ambiguous_dont_use(a)
|
|
/* NB: must not treat EOF as isgraph or isprint */
|
|
#define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
|
|
#define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
|
|
|
|
|
|
/* Simple unit-testing framework */
|
|
|
|
typedef void (*bbunit_testfunc)(void);
|
|
|
|
struct bbunit_listelem {
|
|
const char* name;
|
|
bbunit_testfunc testfunc;
|
|
};
|
|
|
|
void bbunit_registertest(struct bbunit_listelem* test);
|
|
void bbunit_settestfailed(void);
|
|
|
|
#define BBUNIT_DEFINE_TEST(NAME) \
|
|
static void bbunit_##NAME##_test(void); \
|
|
static struct bbunit_listelem bbunit_##NAME##_elem = { \
|
|
.name = #NAME, \
|
|
.testfunc = bbunit_##NAME##_test, \
|
|
}; \
|
|
static void INIT_FUNC bbunit_##NAME##_register(void) \
|
|
{ \
|
|
bbunit_registertest(&bbunit_##NAME##_elem); \
|
|
} \
|
|
static void bbunit_##NAME##_test(void)
|
|
|
|
/*
|
|
* Both 'goto bbunit_end' and 'break' are here only to get rid
|
|
* of compiler warnings.
|
|
*/
|
|
#define BBUNIT_ENDTEST \
|
|
do { \
|
|
goto bbunit_end; \
|
|
bbunit_end: \
|
|
break; \
|
|
} while (0)
|
|
|
|
#define BBUNIT_PRINTASSERTFAIL \
|
|
do { \
|
|
bb_error_msg( \
|
|
"[ERROR] Assertion failed in file %s, line %d", \
|
|
__FILE__, __LINE__); \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERTION_FAILED \
|
|
do { \
|
|
bbunit_settestfailed(); \
|
|
goto bbunit_end; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Assertions.
|
|
* For now we only offer assertions which cause tests to fail
|
|
* immediately. In the future 'expects' might be added too -
|
|
* similar to those offered by the gtest framework.
|
|
*/
|
|
#define BBUNIT_ASSERT_EQ(EXPECTED, ACTUAL) \
|
|
do { \
|
|
if ((EXPECTED) != (ACTUAL)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' isn't equal to '%s'", \
|
|
#EXPECTED, #ACTUAL); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_NOTEQ(EXPECTED, ACTUAL) \
|
|
do { \
|
|
if ((EXPECTED) == (ACTUAL)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' is equal to '%s'", \
|
|
#EXPECTED, #ACTUAL); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_NOTNULL(PTR) \
|
|
do { \
|
|
if ((PTR) == NULL) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' is NULL!", #PTR); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_NULL(PTR) \
|
|
do { \
|
|
if ((PTR) != NULL) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] '%s' is not NULL!", #PTR); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_FALSE(STATEMENT) \
|
|
do { \
|
|
if ((STATEMENT)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Statement '%s' evaluated to true!", \
|
|
#STATEMENT); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_TRUE(STATEMENT) \
|
|
do { \
|
|
if (!(STATEMENT)) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Statement '%s' evaluated to false!", \
|
|
#STATEMENT); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_STREQ(STR1, STR2) \
|
|
do { \
|
|
if (strcmp(STR1, STR2) != 0) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Strings '%s' and '%s' " \
|
|
"are not the same", STR1, STR2); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define BBUNIT_ASSERT_STRNOTEQ(STR1, STR2) \
|
|
do { \
|
|
if (strcmp(STR1, STR2) == 0) { \
|
|
BBUNIT_PRINTASSERTFAIL; \
|
|
bb_error_msg("[ERROR] Strings '%s' and '%s' " \
|
|
"are the same, but were " \
|
|
"expected to differ", STR1, STR2); \
|
|
BBUNIT_ASSERTION_FAILED; \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
POP_SAVED_FUNCTION_VISIBILITY
|
|
|
|
#endif
|