1999-10-06 00:24:54 +08:00
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/*
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1999-10-07 16:30:23 +08:00
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* Mini mount implementation for busybox
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*
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1999-10-21 06:08:37 +08:00
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* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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1999-10-07 16:30:23 +08:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* 3/21/1999 Charles P. Wright <cpwright@cpwright.com>
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* searches through fstab when -a is passed
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* will try mounting stuff with all fses when passed -t auto
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*
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* 1999-04-17 Dave Cinege...Rewrote -t auto. Fixed ro mtab.
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1999-10-21 06:08:37 +08:00
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*
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* 1999-10-07 Erik Andersen <andersen@lineo.com>, <andersee@debian.org>.
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* Rewrote of a lot of code. Removed mtab usage (I plan on
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* putting it back as a compile-time option some time),
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* major adjustments to option parsing, and some serious
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* dieting all around.
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1999-10-06 00:24:54 +08:00
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*/
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#include "internal.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <mntent.h>
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#include <sys/mount.h>
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#include <ctype.h>
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1999-10-07 16:30:23 +08:00
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#include <fstab.h>
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1999-11-05 05:18:07 +08:00
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extern const char mtab_file[]; /* Defined in utility.c */
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1999-11-11 07:13:02 +08:00
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static const char mount_usage[] = "\tmount [flags]\n"
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1999-10-07 16:30:23 +08:00
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"\tmount [flags] device directory [-o options,more-options]\n"
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"\n"
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"Flags:\n"
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"\t-a:\tMount all file systems in fstab.\n"
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1999-11-05 05:18:07 +08:00
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#ifdef BB_MTAB
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"\t-f:\t\"Fake\" mount. Add entry to mount table but don't mount it.\n"
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"\t-n:\tDon't write a mount table entry.\n"
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#endif
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1999-10-07 16:30:23 +08:00
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"\t-o option:\tOne of many filesystem options, listed below.\n"
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"\t-r:\tMount the filesystem read-only.\n"
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"\t-t filesystem-type:\tSpecify the filesystem type.\n"
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"\t-w:\tMount for reading and writing (default).\n"
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"\n"
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"Options for use with the \"-o\" flag:\n"
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"\tasync / sync:\tWrites are asynchronous / synchronous.\n"
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"\tdev / nodev:\tAllow use of special device files / disallow them.\n"
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"\texec / noexec:\tAllow use of executable files / disallow them.\n"
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"\tsuid / nosuid:\tAllow set-user-id-root programs / disallow them.\n"
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"\tremount: Re-mount a currently-mounted filesystem, changing its flags.\n"
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"\tro / rw: Mount for read-only / read-write.\n"
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"\t"
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"There are EVEN MORE flags that are specific to each filesystem.\n"
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"You'll have to see the written documentation for those.\n";
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1999-10-06 00:24:54 +08:00
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1999-11-05 05:18:07 +08:00
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1999-10-06 00:24:54 +08:00
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struct mount_options {
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1999-10-07 16:30:23 +08:00
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const char *name;
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unsigned long and;
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unsigned long or;
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1999-10-06 00:24:54 +08:00
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};
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1999-10-07 16:30:23 +08:00
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static const struct mount_options mount_options[] = {
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{"async", ~MS_SYNCHRONOUS, 0},
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{"defaults", ~0, 0},
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{"dev", ~MS_NODEV, 0},
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{"exec", ~MS_NOEXEC, 0},
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{"nodev", ~0, MS_NODEV},
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{"noexec", ~0, MS_NOEXEC},
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{"nosuid", ~0, MS_NOSUID},
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{"remount", ~0, MS_REMOUNT},
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{"ro", ~0, MS_RDONLY},
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{"rw", ~MS_RDONLY, 0},
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{"suid", ~MS_NOSUID, 0},
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{"sync", ~0, MS_SYNCHRONOUS},
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{0, 0, 0}
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1999-10-06 00:24:54 +08:00
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};
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1999-11-05 05:18:07 +08:00
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#if ! defined BB_MTAB
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1999-11-16 01:33:30 +08:00
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#define do_mount(specialfile, dir, filesystemtype, flags, string_flags, useMtab, fakeIt, mtab_opts) \
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1999-11-05 05:18:07 +08:00
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mount(specialfile, dir, filesystemtype, flags, string_flags)
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#else
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static int
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do_mount(char* specialfile, char* dir, char* filesystemtype,
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1999-11-16 01:33:30 +08:00
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long flags, void* string_flags, int useMtab, int fakeIt, char* mtab_opts)
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1999-11-05 05:18:07 +08:00
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{
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int status=0;
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if (fakeIt==FALSE)
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status=mount(specialfile, dir, filesystemtype, flags, string_flags);
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if ( status == 0 ) {
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if ( useMtab==TRUE )
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1999-11-16 01:33:30 +08:00
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write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
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1999-11-05 05:18:07 +08:00
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return 0;
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}
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else
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return( status);
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}
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#endif
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1999-10-06 00:24:54 +08:00
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1999-10-09 01:14:14 +08:00
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/* Seperate standard mount options from the nonstandard string options */
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1999-10-06 00:24:54 +08:00
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static void
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1999-10-09 01:14:14 +08:00
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parse_mount_options ( char *options, unsigned long *flags, char *strflags)
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1999-10-06 00:24:54 +08:00
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{
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1999-10-09 01:14:14 +08:00
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while (options) {
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int gotone=FALSE;
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1999-10-07 16:30:23 +08:00
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char *comma = strchr (options, ',');
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const struct mount_options* f = mount_options;
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if (comma)
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*comma = '\0';
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while (f->name != 0) {
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if (strcasecmp (f->name, options) == 0) {
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1999-11-04 09:13:21 +08:00
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1999-10-07 16:30:23 +08:00
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*flags &= f->and;
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*flags |= f->or;
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1999-10-09 01:14:14 +08:00
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gotone=TRUE;
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break;
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1999-10-07 16:30:23 +08:00
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}
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f++;
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1999-10-06 00:24:54 +08:00
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}
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1999-10-09 01:14:14 +08:00
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if (*strflags && strflags!= '\0' && gotone==FALSE) {
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char *temp=strflags;
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temp += strlen (strflags);
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*temp++ = ',';
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*temp++ = '\0';
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}
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if (gotone==FALSE) {
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strcat (strflags, options);
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gotone=FALSE;
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1999-10-06 00:24:54 +08:00
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}
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1999-10-07 16:30:23 +08:00
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if (comma) {
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*comma = ',';
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options = ++comma;
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1999-10-09 01:14:14 +08:00
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} else {
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1999-10-07 16:30:23 +08:00
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break;
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1999-10-09 01:14:14 +08:00
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}
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1999-10-07 16:30:23 +08:00
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}
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1999-10-06 00:24:54 +08:00
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}
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int
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1999-11-05 05:18:07 +08:00
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mount_one(char *blockDevice, char *directory, char *filesystemType,
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1999-11-16 01:33:30 +08:00
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unsigned long flags, char *string_flags, int useMtab, int fakeIt, char *mtab_opts)
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1999-10-06 00:24:54 +08:00
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{
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1999-10-07 16:30:23 +08:00
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int status = 0;
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1999-10-06 00:24:54 +08:00
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1999-10-07 16:30:23 +08:00
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char buf[255];
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1999-10-06 00:24:54 +08:00
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1999-10-07 16:30:23 +08:00
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if (strcmp(filesystemType, "auto") == 0) {
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FILE *f = fopen ("/proc/filesystems", "r");
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1999-10-06 00:24:54 +08:00
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1999-10-07 16:30:23 +08:00
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if (f == NULL)
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return( FALSE);
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1999-10-06 00:24:54 +08:00
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1999-10-07 16:30:23 +08:00
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while (fgets (buf, sizeof (buf), f) != NULL) {
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filesystemType = buf;
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if (*filesystemType == '\t') { // Not a nodev filesystem
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1999-10-06 00:24:54 +08:00
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1999-10-07 16:30:23 +08:00
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// Add NULL termination to each line
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while (*filesystemType && *filesystemType != '\n')
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filesystemType++;
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*filesystemType = '\0';
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1999-10-06 00:24:54 +08:00
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1999-10-07 16:30:23 +08:00
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filesystemType = buf;
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filesystemType++; // hop past tab
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1999-10-06 00:24:54 +08:00
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|
1999-11-05 05:18:07 +08:00
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status = do_mount (blockDevice, directory, filesystemType,
|
1999-11-16 01:33:30 +08:00
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flags | MS_MGC_VAL, string_flags, useMtab,
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fakeIt, mtab_opts);
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1999-10-07 16:30:23 +08:00
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if (status == 0)
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break;
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}
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1999-10-06 00:24:54 +08:00
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}
|
1999-10-07 16:30:23 +08:00
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fclose (f);
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} else {
|
1999-11-05 05:18:07 +08:00
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status = do_mount (blockDevice, directory, filesystemType,
|
1999-11-16 01:33:30 +08:00
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flags | MS_MGC_VAL, string_flags, useMtab,
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fakeIt, mtab_opts);
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1999-10-07 16:30:23 +08:00
|
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}
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if (status) {
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fprintf (stderr, "Mounting %s on %s failed: %s\n",
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blockDevice, directory, strerror(errno));
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return (FALSE);
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}
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return (TRUE);
|
1999-10-06 00:24:54 +08:00
|
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}
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|
1999-10-07 16:30:23 +08:00
|
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|
extern int mount_main (int argc, char **argv)
|
1999-10-06 00:24:54 +08:00
|
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|
{
|
1999-11-16 01:33:30 +08:00
|
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|
char string_flags_buf[1024]="";
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|
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char *string_flags = string_flags_buf;
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char *extra_opts = string_flags_buf;
|
1999-10-07 16:30:23 +08:00
|
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unsigned long flags = 0;
|
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char *filesystemType = "auto";
|
1999-10-09 01:14:14 +08:00
|
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char *device = NULL;
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char *directory = NULL;
|
1999-11-05 05:18:07 +08:00
|
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int all = FALSE;
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|
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int fakeIt = FALSE;
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int useMtab = TRUE;
|
1999-10-09 01:14:14 +08:00
|
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|
int i;
|
1999-10-07 16:30:23 +08:00
|
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|
|
1999-11-06 14:07:27 +08:00
|
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|
/* Only compiled in if BB_MTAB is not defined */
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whine_if_fstab_is_missing();
|
1999-10-16 23:48:40 +08:00
|
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|
1999-10-07 16:30:23 +08:00
|
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|
if (argc == 1) {
|
1999-11-05 05:18:07 +08:00
|
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|
FILE *mountTable = setmntent (mtab_file, "r");
|
|
|
|
if (mountTable) {
|
1999-10-07 16:30:23 +08:00
|
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|
struct mntent *m;
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|
|
while ((m = getmntent (mountTable)) != 0) {
|
1999-10-16 23:48:40 +08:00
|
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|
struct fstab* fstabItem;
|
1999-10-07 16:30:23 +08:00
|
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|
char *blockDevice = m->mnt_fsname;
|
1999-10-16 23:48:40 +08:00
|
|
|
/* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */
|
|
|
|
if (strcmp (blockDevice, "/dev/root") == 0) {
|
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|
|
fstabItem = getfsfile ("/");
|
|
|
|
if (fstabItem != NULL)
|
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|
|
blockDevice = fstabItem->fs_spec;
|
|
|
|
}
|
1999-10-07 16:30:23 +08:00
|
|
|
printf ("%s on %s type %s (%s)\n", blockDevice, m->mnt_dir,
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|
|
|
m->mnt_type, m->mnt_opts);
|
|
|
|
}
|
|
|
|
endmntent (mountTable);
|
1999-11-05 05:18:07 +08:00
|
|
|
} else {
|
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|
|
perror(mtab_file);
|
1999-10-06 00:24:54 +08:00
|
|
|
}
|
1999-10-15 06:16:57 +08:00
|
|
|
exit( TRUE);
|
1999-10-07 16:30:23 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Parse options */
|
1999-10-09 01:14:14 +08:00
|
|
|
i = --argc;
|
|
|
|
argv++;
|
|
|
|
while (i > 0 && **argv) {
|
1999-10-07 16:30:23 +08:00
|
|
|
if (**argv == '-') {
|
1999-11-16 01:33:30 +08:00
|
|
|
char *opt = *argv;
|
|
|
|
while (i>0 && *++opt) switch (*opt) {
|
1999-10-07 16:30:23 +08:00
|
|
|
case 'o':
|
1999-10-09 01:14:14 +08:00
|
|
|
if (--i == 0) {
|
1999-11-11 07:13:02 +08:00
|
|
|
goto goodbye;
|
1999-10-06 00:24:54 +08:00
|
|
|
}
|
1999-10-09 01:14:14 +08:00
|
|
|
parse_mount_options (*(++argv), &flags, string_flags);
|
1999-10-07 16:30:23 +08:00
|
|
|
break;
|
|
|
|
case 'r':
|
|
|
|
flags |= MS_RDONLY;
|
|
|
|
break;
|
|
|
|
case 't':
|
1999-10-09 01:14:14 +08:00
|
|
|
if (--i == 0) {
|
1999-11-11 07:13:02 +08:00
|
|
|
goto goodbye;
|
1999-10-06 00:24:54 +08:00
|
|
|
}
|
1999-10-09 01:14:14 +08:00
|
|
|
filesystemType = *(++argv);
|
1999-10-07 16:30:23 +08:00
|
|
|
break;
|
|
|
|
case 'w':
|
|
|
|
flags &= ~MS_RDONLY;
|
|
|
|
break;
|
|
|
|
case 'a':
|
1999-11-04 09:13:21 +08:00
|
|
|
all = TRUE;
|
1999-10-07 16:30:23 +08:00
|
|
|
break;
|
1999-11-05 05:18:07 +08:00
|
|
|
#ifdef BB_MTAB
|
|
|
|
case 'f':
|
|
|
|
fakeIt = TRUE;
|
|
|
|
break;
|
|
|
|
case 'n':
|
|
|
|
useMtab = FALSE;
|
|
|
|
break;
|
|
|
|
#endif
|
1999-10-07 16:30:23 +08:00
|
|
|
case 'v':
|
|
|
|
case 'h':
|
|
|
|
case '-':
|
1999-11-11 07:13:02 +08:00
|
|
|
goto goodbye;
|
1999-10-09 01:14:14 +08:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (device == NULL)
|
|
|
|
device=*argv;
|
|
|
|
else if (directory == NULL)
|
|
|
|
directory=*argv;
|
|
|
|
else {
|
1999-11-11 07:13:02 +08:00
|
|
|
goto goodbye;
|
1999-10-07 16:30:23 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
i--;
|
|
|
|
argv++;
|
|
|
|
}
|
1999-10-06 00:24:54 +08:00
|
|
|
|
1999-11-04 09:13:21 +08:00
|
|
|
if (all == TRUE) {
|
1999-10-07 16:30:23 +08:00
|
|
|
struct mntent *m;
|
|
|
|
FILE *f = setmntent ("/etc/fstab", "r");
|
1999-10-06 00:24:54 +08:00
|
|
|
|
1999-10-07 16:30:23 +08:00
|
|
|
if (f == NULL) {
|
|
|
|
perror("/etc/fstab");
|
1999-10-15 06:16:57 +08:00
|
|
|
exit( FALSE);
|
1999-10-07 16:30:23 +08:00
|
|
|
}
|
|
|
|
while ((m = getmntent (f)) != NULL) {
|
1999-11-04 09:13:21 +08:00
|
|
|
// If the file system isn't noauto, and isn't mounted on /,
|
|
|
|
// and isn't swap or nfs, then mount it
|
|
|
|
if ((!strstr (m->mnt_opts, "noauto")) &&
|
|
|
|
(m->mnt_dir[1] != '\0') &&
|
|
|
|
(!strstr (m->mnt_type, "swap")) &&
|
|
|
|
(!strstr (m->mnt_type, "nfs")))
|
|
|
|
{
|
1999-11-05 05:18:07 +08:00
|
|
|
flags = 0;
|
1999-11-04 09:13:21 +08:00
|
|
|
*string_flags = '\0';
|
1999-11-05 05:18:07 +08:00
|
|
|
parse_mount_options(m->mnt_opts, &flags, string_flags);
|
|
|
|
mount_one (m->mnt_fsname, m->mnt_dir, m->mnt_type,
|
1999-11-16 01:33:30 +08:00
|
|
|
flags, string_flags, useMtab, fakeIt, extra_opts);
|
1999-10-07 16:30:23 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
endmntent (f);
|
|
|
|
} else {
|
1999-10-09 01:14:14 +08:00
|
|
|
if (device && directory) {
|
1999-11-16 01:33:30 +08:00
|
|
|
#ifdef BB_NFSMOUNT
|
|
|
|
if (strcmp(filesystemType, "nfs") == 0) {
|
|
|
|
if (nfsmount(device, directory, &flags, &extra_opts, &string_flags, 1) != 0)
|
|
|
|
exit(FALSE);
|
|
|
|
}
|
|
|
|
#endif
|
1999-10-15 06:16:57 +08:00
|
|
|
exit (mount_one (device, directory, filesystemType,
|
1999-11-16 01:33:30 +08:00
|
|
|
flags, string_flags, useMtab, fakeIt, extra_opts));
|
1999-10-06 00:24:54 +08:00
|
|
|
} else {
|
1999-11-11 07:13:02 +08:00
|
|
|
goto goodbye;
|
1999-10-06 00:24:54 +08:00
|
|
|
}
|
1999-10-07 16:30:23 +08:00
|
|
|
}
|
1999-10-15 06:16:57 +08:00
|
|
|
exit( TRUE);
|
1999-11-11 07:13:02 +08:00
|
|
|
|
|
|
|
goodbye:
|
|
|
|
usage( mount_usage);
|
1999-10-06 00:24:54 +08:00
|
|
|
}
|