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