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357 lines
13 KiB
Bash
Executable File
357 lines
13 KiB
Bash
Executable File
#!/bin/sh
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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# Create sysinfo.go.
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# This shell script creates the sysinfo.go file which holds types and
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# constants extracted from the system header files. This relies on a
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# hook in gcc: the -fdump-go-spec option will generate debugging
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# information in Go syntax.
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# We currently #include all the files at once, which works, but leads
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# to exposing some names which ideally should not be exposed, as they
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# match grep patterns. E.g., WCHAR_MIN gets exposed because it starts
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# with W, like the wait flags.
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CC=${CC:-gcc}
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OUT=tmp-sysinfo.go
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set -e
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rm -f sysinfo.go
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rm -f sysinfo.c
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cat > sysinfo.c <<EOF
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#include "config.h"
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#include <sys/types.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 <netinet/in.h>
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#include <netinet/tcp.h>
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#include <signal.h>
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#if defined(HAVE_SYSCALL_H)
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#include <syscall.h>
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#endif
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#if defined(HAVE_SYS_EPOLL_H)
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#include <sys/epoll.h>
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#endif
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#if defined(HAVE_SYS_PTRACE_H)
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#include <sys/ptrace.h>
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#endif
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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/wait.h>
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#include <sys/un.h>
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#if defined(HAVE_SYS_USER_H)
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#include <sys/user.h>
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#endif
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#if defined(HAVE_SYS_UTSNAME_H)
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#include <sys/utsname.h>
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#endif
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#include <unistd.h>
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EOF
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${CC} -D_GNU_SOURCE -fdump-go-spec=gen-sysinfo.go -S -o sysinfo.s sysinfo.c
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echo 'package syscall' > ${OUT}
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# Get all the consts and types, skipping ones which could not be
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# represented in Go and ones which we need to rewrite. We also skip
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# function declarations, as we don't need them here. All the symbols
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# will all have a leading underscore.
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grep -v '^// ' gen-sysinfo.go | \
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grep -v '^func' | \
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grep -v '^type _timeval ' | \
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grep -v '^type _timespec ' | \
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grep -v '^type _timestruc_t ' | \
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grep -v '^type _epoll_' | \
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grep -v 'in6_addr' | \
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grep -v 'sockaddr_in6' | \
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sed -e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
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-e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
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-e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
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>> ${OUT}
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# The errno constants.
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grep '^const _E' gen-sysinfo.go | \
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sed -e 's/^\(const \)_\(E[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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# The O_xxx flags.
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grep '^const _\(O\|F\|FD\)_' gen-sysinfo.go | \
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sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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if ! grep '^const O_ASYNC' ${OUT} >/dev/null 2>&1; then
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echo "const O_ASYNC = 0" >> ${OUT}
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fi
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if ! grep '^const O_CLOEXEC' ${OUT} >/dev/null 2>&1; then
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echo "const O_CLOEXEC = 0" >> ${OUT}
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fi
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# The signal numbers.
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grep '^const _SIG[^_]' gen-sysinfo.go | \
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grep -v '^const _SIGEV_' | \
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sed -e 's/^\(const \)_\(SIG[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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# The syscall numbers. We force the names to upper case.
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grep '^const _SYS_' gen-sysinfo.go | \
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sed -e 's/const _\(SYS_[^= ]*\).*$/\1/' | \
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while read sys; do
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sup=`echo $sys | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
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echo "const $sup = _$sys" >> ${OUT}
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done
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# Stat constants.
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grep '^const _S_' gen-sysinfo.go | \
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sed -e 's/^\(const \)_\(S_[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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# Process status constants.
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grep '^const _W' gen-sysinfo.go |
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sed -e 's/^\(const \)_\(W[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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# WSTOPPED was introduced in glibc 2.3.4.
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if ! grep '^const _WSTOPPED = ' gen-sysinfo.go >/dev/null 2>&1; then
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if grep '^const _WUNTRACED = ' gen-sysinfo.go > /dev/null 2>&1; then
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echo 'const WSTOPPED = _WUNTRACED' >> ${OUT}
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else
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echo 'const WSTOPPED = 2' >> ${OUT}
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fi
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fi
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if grep '^const ___WALL = ' gen-sysinfo.go >/dev/null 2>&1 \
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&& ! grep '^const _WALL = ' gen-sysinfo.go >/dev/null 2>&1; then
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echo 'const WALL = ___WALL' >> ${OUT}
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fi
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# Networking constants.
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grep '^const _\(AF\|SOCK\|SOL\|SO\|IPPROTO\|TCP\|IP\|IPV6\)_' gen-sysinfo.go |
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sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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grep '^const _SOMAXCONN' gen-sysinfo.go |
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sed -e 's/^\(const \)_\(SOMAXCONN[^= ]*\)\(.*\)$/\1\2 = _\2/' \
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>> ${OUT}
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grep '^const _SHUT_' gen-sysinfo.go |
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sed -e 's/^\(const \)_\(SHUT[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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# pathconf constants.
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grep '^const __PC' gen-sysinfo.go |
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sed -e 's/^\(const \)__\(PC[^= ]*\)\(.*\)$/\1\2 = __\2/' >> ${OUT}
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# The epoll constants were picked up by the errno constants, but we
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# need to be sure the EPOLLRDHUP is defined.
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if ! grep '^const EPOLLRDHUP' ${OUT} >/dev/null 2>&1; then
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echo "const EPOLLRDHUP = 0x2000" >> ${OUT}
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fi
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# Ptrace constants. We don't expose all the PTRACE flags, just the
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# PTRACE_O_xxx and PTRACE_EVENT_xxx ones.
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grep '^const _PTRACE_O' gen-sysinfo.go |
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sed -e 's/^\(const \)_\(PTRACE_O[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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grep '^const _PTRACE_EVENT' gen-sysinfo.go |
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sed -e 's/^\(const \)_\(PTRACE_EVENT[^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
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# We need PTRACE_SETOPTIONS and PTRACE_GETEVENTMSG, but they are not
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# defined in older versions of glibc.
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if ! grep '^const _PTRACE_SETOPTIONS' ${OUT} > /dev/null 2>&1; then
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echo "const _PTRACE_SETOPTIONS = 0x4200" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACESYSGOOD' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACESYSGOOD = 0x1" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACEFORK' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACEFORK = 0x2" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACEVFORK' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACEVFORK = 0x4" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACECLONE' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACECLONE = 0x8" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACEEXEC' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACEEXEC = 0x10" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACEVFORKDONE' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACEVFORKDONE = 0x20" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_TRACEEXIT' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_TRACEEXIT = 0x40" >> ${OUT}
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fi
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if ! grep '^const PTRACE_O_MASK' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_O_MASK = 0x7f" >> ${OUT}
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fi
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if ! grep '^const _PTRACE_GETEVENTMSG' ${OUT} > /dev/null 2>&1; then
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echo "const _PTRACE_GETEVENTMSG = 0x4201" >> ${OUT}
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fi
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if ! grep '^const PTRACE_EVENT_FORK' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_EVENT_FORK = 1" >> ${OUT}
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fi
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if ! grep '^const PTRACE_EVENT_VFORK' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_EVENT_VFORK = 2" >> ${OUT}
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fi
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if ! grep '^const PTRACE_EVENT_CLONE' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_EVENT_CLONE = 3" >> ${OUT}
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fi
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if ! grep '^const PTRACE_EVENT_EXEC' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_EVENT_EXEC = 4" >> ${OUT}
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fi
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if ! grep '^const PTRACE_EVENT_VFORK_DONE' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_EVENT_VFORK_DONE = 5" >> ${OUT}
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fi
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if ! grep '^const PTRACE_EVENT_EXIT' ${OUT} > /dev/null 2>&1; then
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echo "const PTRACE_EVENT_EXIT = 6" >> ${OUT}
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fi
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if ! grep '^const _PTRACE_TRACEME' ${OUT} > /dev/null 2>&1; then
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echo "const _PTRACE_TRACEME = 0" >> ${OUT}
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fi
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# The registers returned by PTRACE_GETREGS. This is probably
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# GNU/Linux specific; it should do no harm if there is no
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# _user_regs_struct.
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regs=`grep '^type _user_regs_struct struct' gen-sysinfo.go || true`
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if test "$regs" != ""; then
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regs=`echo $regs | sed -e 's/type _user_regs_struct struct //' -e 's/[{}]//g'`
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regs=`echo $regs | sed -e s'/^ *//'`
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nregs=
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while test -n "$regs"; do
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field=`echo $regs | sed -e 's/^\([^;]*\);.*$/\1/'`
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regs=`echo $regs | sed -e 's/^[^;]*; *\(.*\)$/\1/'`
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# Capitalize the first character of the field.
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f=`echo $field | sed -e 's/^\(.\).*$/\1/'`
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r=`echo $field | sed -e 's/^.\(.*\)$/\1/'`
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f=`echo $f | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
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field="$f$r"
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nregs="$nregs $field;"
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done
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echo "type PtraceRegs struct {$nregs }" >> ${OUT}
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fi
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# Some basic types.
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echo 'type Size_t _size_t' >> ${OUT}
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echo "type Ssize_t _ssize_t" >> ${OUT}
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if grep '^const _HAVE_OFF64_T = ' gen-sysinfo.go > /dev/null 2>&1; then
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echo "type Offset_t _off64_t" >> ${OUT}
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else
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echo "type Offset_t _off_t" >> ${OUT}
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fi
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echo "type Mode_t _mode_t" >> ${OUT}
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echo "type Pid_t _pid_t" >> ${OUT}
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echo "type Uid_t _uid_t" >> ${OUT}
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echo "type Gid_t _gid_t" >> ${OUT}
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echo "type Socklen_t _socklen_t" >> ${OUT}
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# The long type, needed because that is the type that ptrace returns.
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sizeof_long=`grep '^const ___SIZEOF_LONG__ = ' gen-sysinfo.go | sed -e 's/.*= //'`
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if test "$sizeof_long" = "4"; then
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echo "type _C_long int32" >> ${OUT}
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elif test "$sizeof_long" = "8"; then
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echo "type _C_long int64" >> ${OUT}
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else
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echo 1>&2 "mksysinfo.sh: could not determine size of long (got $sizeof_long)"
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exit 1
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fi
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# The time structures need special handling: we need to name the
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# types, so that we can cast integers to the right types when
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# assigning to the structures.
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timeval=`grep '^type _timeval ' gen-sysinfo.go`
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timeval_sec=`echo $timeval | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
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timeval_usec=`echo $timeval | sed -n -e 's/^.*tv_usec \([^ ]*\);.*$/\1/p'`
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echo "type Timeval_sec_t $timeval_sec" >> ${OUT}
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echo "type Timeval_usec_t $timeval_usec" >> ${OUT}
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echo $timeval | \
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sed -e 's/type _timeval /type Timeval /' \
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-e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timeval_sec_t/' \
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-e 's/tv_usec *[a-zA-Z0-9_]*/Usec Timeval_usec_t/' >> ${OUT}
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timespec=`grep '^type _timespec ' gen-sysinfo.go`
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timespec_sec=`echo $timespec | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
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timespec_nsec=`echo $timespec | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
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echo "type Timespec_sec_t $timespec_sec" >> ${OUT}
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echo "type Timespec_nsec_t $timespec_nsec" >> ${OUT}
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echo $timespec | \
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sed -e 's/^type _timespec /type Timespec /' \
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-e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timespec_sec_t/' \
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-e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timespec_nsec_t/' >> ${OUT}
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timestruc=`grep '^type _timestruc_t ' gen-sysinfo.go || true`
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if test "$timestruc" != ""; then
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timestruc_sec=`echo $timestruc | sed -n -e 's/^.*tv_sec \([^ ]*\);.*$/\1/p'`
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timestruc_nsec=`echo $timestruc | sed -n -e 's/^.*tv_nsec \([^ ]*\);.*$/\1/p'`
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echo "type Timestruc_sec_t $timestruc_sec" >> ${OUT}
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echo "type Timestruc_nsec_t $timestruc_nsec" >> ${OUT}
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echo $timestruc | \
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sed -e 's/^type _timestruc_t /type Timestruc /' \
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-e 's/tv_sec *[a-zA-Z0-9_]*/Sec Timestruc_sec_t/' \
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-e 's/tv_nsec *[a-zA-Z0-9_]*/Nsec Timestruc_nsec_t/' >> ${OUT}
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fi
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# The stat type.
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grep 'type _stat ' gen-sysinfo.go | \
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sed -e 's/type _stat/type Stat_t/' \
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-e 's/st_dev/Dev/' \
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-e 's/st_ino/Ino/' \
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-e 's/st_nlink/Nlink/' \
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-e 's/st_mode/Mode/' \
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-e 's/st_uid/Uid/' \
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-e 's/st_gid/Gid/' \
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-e 's/st_rdev/Rdev/' \
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-e 's/st_size/Size/' \
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-e 's/st_blksize/Blksize/' \
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-e 's/st_blocks/Blocks/' \
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-e 's/st_atim/Atime/' \
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-e 's/st_mtim/Mtime/' \
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-e 's/st_ctim/Ctime/' \
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-e 's/\([^a-zA-Z0-9_]\)_timeval\([^a-zA-Z0-9_]\)/\1Timeval\2/g' \
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-e 's/\([^a-zA-Z0-9_]\)_timespec\([^a-zA-Z0-9_]\)/\1Timespec\2/g' \
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-e 's/\([^a-zA-Z0-9_]\)_timestruc_t\([^a-zA-Z0-9_]\)/\1Timestruc\2/g' \
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>> ${OUT}
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# The directory searching types.
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grep '^type _dirent ' gen-sysinfo.go | \
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sed -e 's/type _dirent/type Dirent/' \
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-e 's/d_name/Name/' \
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-e 's/]int8/]byte/' \
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-e 's/d_ino/Ino/' \
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-e 's/d_off/Off/' \
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-e 's/d_reclen/Reclen/' \
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-e 's/d_type/Type/' \
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>> ${OUT}
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echo "type DIR _DIR" >> ${OUT}
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# The rusage struct.
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rusage=`grep '^type _rusage struct' gen-sysinfo.go`
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if test "$rusage" != ""; then
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rusage=`echo $rusage | sed -e 's/type _rusage struct //' -e 's/[{}]//g'`
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rusage=`echo $rusage | sed -e 's/^ *//'`
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nrusage=
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while test -n "$rusage"; do
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field=`echo $rusage | sed -e 's/^\([^;]*\);.*$/\1/'`
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rusage=`echo $rusage | sed -e 's/^[^;]*; *\(.*\)$/\1/'`
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# Drop the leading ru_, capitalize the next character.
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field=`echo $field | sed -e 's/^ru_//'`
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f=`echo $field | sed -e 's/^\(.\).*$/\1/'`
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r=`echo $field | sed -e 's/^.\(.*\)$/\1/'`
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f=`echo $f | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
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# Fix _timeval _timespec, and _timestruc_t.
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r=`echo $r | sed -e s'/ _timeval$/ Timeval/'`
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r=`echo $r | sed -e s'/ _timespec$/ Timespec/'`
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r=`echo $r | sed -e s'/ _timestruc_t$/ Timestruc/'`
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field="$f$r"
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nrusage="$nrusage $field;"
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done
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echo "type Rusage struct {$nrusage }" >> ${OUT}
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fi
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# The utsname struct.
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grep '^type _utsname ' gen-sysinfo.go | \
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sed -e 's/_utsname/Utsname/' \
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-e 's/sysname/Sysname/' \
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-e 's/nodename/Nodename/' \
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-e 's/release/Release/' \
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-e 's/version/Version/' \
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-e 's/machine/Machine/' \
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-e 's/domainname/Domainname/' \
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>> ${OUT}
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mv -f ${OUT} sysinfo.go
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exit $?
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