int mount_main(int argc, char **argv)
{
char *cmdopts = bb_xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
FILE *fstab;
int i, opt, all = FALSE, rc = 0;
struct mntent mtpair[2], *mtcur = mtpair;
int resolved_spec = 0;
/* parse long options, like --bind and --move. Note that -o option
* and --option are synonymous. Yes, this means --remount,rw works. */
for (i = opt = 0; i < argc; i++) {
if (argv[i][0] == '-' && argv[i][1] == '-') {
append_mount_options(&cmdopts,argv[i]+2);
} else argv[opt++] = argv[i];
}
argc = opt;
// Parse remaining options
while ((opt = getopt(argc, argv, "o:t:rwavnfi")) > 0) {
switch (opt) {
case 'o':
append_mount_options(&cmdopts, optarg);
break;
case 't':
fstype = optarg;
break;
case 'r':
append_mount_options(&cmdopts, "ro");
break;
case 'w':
append_mount_options(&cmdopts, "rw");
break;
case 'a':
all = TRUE;
break;
case 'n':
USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE;)
break;
case 'f':
USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE;)
break;
case 'i':
case 'v':
break; // ignore
default:
bb_show_usage();
}
static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
{
int rc;
if (fakeIt) { return 0; }
// Mount, with fallback to read-only if necessary.
for(;;) {
rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
vfsflags, filteropts);
if(!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
break;
bb_error_msg("%s is write-protected, mounting read-only",
mp->mnt_fsname);
vfsflags |= MS_RDONLY;
}
// Abort entirely if permission denied.
if (rc && errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
/* If the mount was successful, and we're maintaining an old-style
* mtab file by hand, add the new entry to it now. */
if(ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc) {
FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
int i;
if(!mountTable)
bb_error_msg("No %s\n",bb_path_mtab_file);
// Add vfs string flags
for(i=0; mount_options[i].flags != MS_REMOUNT; i++)
if (mount_options[i].flags > 0)
append_mount_options(&(mp->mnt_opts),
// Shut up about the darn const. It's not important. I don't care.
(char *)mount_options[i].name);
// Remove trailing / (if any) from directory we mounted on
i = strlen(mp->mnt_dir);
if(i>1 && mp->mnt_dir[i-1] == '/') mp->mnt_dir[i-1] = 0;
// Write and close.
if(!mp->mnt_type || !*mp->mnt_type) mp->mnt_type="--bind";
addmntent(mountTable, mp);
endmntent(mountTable);
if (ENABLE_FEATURE_CLEAN_UP)
if(strcmp(mp->mnt_type,"--bind")) mp->mnt_type = 0;
}
return rc;
}
// Perform actual mount of specific filesystem at specific location.
// NB: mp->xxx fields may be trashed on exit
static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
{
int rc = 0;
if (fakeIt) goto mtab;
// Mount, with fallback to read-only if necessary.
for (;;) {
rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
vfsflags, filteropts);
if (!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
break;
bb_error_msg("%s is write-protected, mounting read-only",
mp->mnt_fsname);
vfsflags |= MS_RDONLY;
}
// Abort entirely if permission denied.
if (rc && errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
/* If the mount was successful, and we're maintaining an old-style
* mtab file by hand, add the new entry to it now. */
mtab:
if (ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc && !(vfsflags & MS_REMOUNT)) {
char *fsname;
FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
int i;
if (!mountTable) {
bb_error_msg("no %s",bb_path_mtab_file);
goto ret;
}
// Add vfs string flags
for (i=0; mount_options[i].flags != MS_REMOUNT; i++)
if (mount_options[i].flags > 0 && (mount_options[i].flags & vfsflags))
append_mount_options(&(mp->mnt_opts), mount_options[i].name);
// Remove trailing / (if any) from directory we mounted on
i = strlen(mp->mnt_dir) - 1;
if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = 0;
// Convert to canonical pathnames as needed
mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
fsname = 0;
if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */
mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
mp->mnt_type = (char*)"bind";
}
mp->mnt_freq = mp->mnt_passno = 0;
// Write and close.
addmntent(mountTable, mp);
endmntent(mountTable);
if (ENABLE_FEATURE_CLEAN_UP) {
free(mp->mnt_dir);
free(fsname);
}
}
ret:
return rc;
}
