int eject_main(int argc, char **argv)
{
unsigned long flags;
char *device;
struct mntent *m;
flags = bb_getopt_ulflags(argc, argv, "t");
device = argv[optind] ? : DEFAULT_CDROM;
if ((m = find_mount_point(device, bb_path_mtab_file))) {
if (umount(m->mnt_dir)) {
bb_error_msg_and_die("Can't umount");
} else if (ENABLE_FEATURE_MTAB_SUPPORT) {
erase_mtab(m->mnt_fsname);
}
}
if (ioctl(bb_xopen(device, (O_RDONLY | O_NONBLOCK)),
(flags ? CDROMCLOSETRAY : CDROMEJECT))) {
bb_perror_msg_and_die("%s", device);
}
return (EXIT_SUCCESS);
}
extern int umount_main(int argc, char **argv)
{
int doForce;
char path[2*PATH_MAX];
struct mntent me;
FILE *fp;
int status=EXIT_SUCCESS;
unsigned long opt;
struct mtab_list {
char *dir;
char *device;
struct mtab_list *next;
} *mtl, *m;
/* Parse any options */
opt = bb_getopt_ulflags (argc, argv, OPTION_STRING);
argc -= optind;
argv += optind;
doForce = MAX((opt & OPT_FORCE), (opt & OPT_LAZY));
/* Get a list of mount points from mtab. We read them all in now mostly
* for umount -a (so we don't have to worry about the list changing while
* we iterate over it, or about getting stuck in a loop on the same failing
* entry. Notice that this also naturally reverses the list so that -a
* umounts the most recent entries first. */
m=mtl=0;
if(!(fp = setmntent(bb_path_mtab_file, "r")))
bb_error_msg_and_die("Cannot open %s", bb_path_mtab_file);
while (getmntent_r(fp,&me,path,sizeof(path))) {
m=xmalloc(sizeof(struct mtab_list));
m->next=mtl;
m->device=bb_xstrdup(me.mnt_fsname);
m->dir=bb_xstrdup(me.mnt_dir);
mtl=m;
}
endmntent(fp);
/* If we're umounting all, then m points to the start of the list and
* the argument list should be empty (which will match all). */
if(!(opt & OPT_ALL)) {
m=0;
if(argc <= 0) bb_show_usage();
}
// Loop through everything we're supposed to umount, and do so.
for(;;) {
int curstat;
// Do we already know what to umount this time through the loop?
if(m) safe_strncpy(path,m->dir,PATH_MAX);
// For umount -a, end of mtab means time to exit.
else if(opt & OPT_ALL) break;
// Get next command line argument (and look it up in mtab list)
else if(!argc--) break;
else {
// Get next command line argument (and look it up in mtab list)
realpath(*argv++, path);
for(m = mtl; m; m = m->next)
if(!strcmp(path, m->dir) || !strcmp(path, m->device))
break;
}
// Let's ask the thing nicely to unmount.
curstat = umount(path);
// Force the unmount, if necessary.
if(curstat && doForce) {
curstat = umount2(path, doForce);
if(curstat)
bb_error_msg_and_die("forced umount of %s failed!", path);
}
// If still can't umount, maybe remount read-only?
if (curstat && (opt & OPT_REMOUNT) && errno == EBUSY && m) {
curstat = mount(m->device, path, NULL, MS_REMOUNT|MS_RDONLY, NULL);
bb_error_msg(curstat ? "Cannot remount %s read-only" :
"%s busy - remounted read-only", m->device);
}
/* De-allocate the loop device. This ioctl should be ignored on any
* non-loop block devices. */
if(ENABLE_FEATURE_MOUNT_LOOP && !(opt & OPT_DONTFREELOOP) && m)
del_loop(m->device);
if(curstat) {
/* Yes, the ENABLE is redundant here, but the optimizer for ARM
* can't do simple constant propagation in local variables... */
if(ENABLE_FEATURE_MTAB_SUPPORT && !(opt & OPT_NO_MTAB) && m)
erase_mtab(m->dir);
status = EXIT_FAILURE;
bb_perror_msg("Couldn't umount %s", path);
}
// Find next matching mtab entry for -a or umount /dev
while(m && (m = m->next))
if((opt & OPT_ALL) || !strcmp(path,m->device))
break;
}
// Free mtab list if necessary
if(ENABLE_FEATURE_CLEAN_UP) {
while(mtl) {
m=mtl->next;
free(mtl->device);
free(mtl->dir);
free(mtl);
mtl=m;
}
}
return status;
}
static int
do_mount(char *specialfile, char *dir, char *filesystemtype,
long flags, void *string_flags, int useMtab, int fakeIt,
char *mtab_opts, int mount_all)
{
int status = 0;
#if defined BB_FEATURE_MOUNT_LOOP
char *lofile = NULL;
#endif
if (! fakeIt)
{
#if defined BB_FEATURE_MOUNT_LOOP
if (use_loop==TRUE) {
int loro = flags & MS_RDONLY;
lofile = specialfile;
specialfile = find_unused_loop_device();
if (specialfile == NULL) {
error_msg_and_die("Could not find a spare loop device");
}
if (set_loop(specialfile, lofile, 0, &loro)) {
error_msg_and_die("Could not setup loop device");
}
if (!(flags & MS_RDONLY) && loro) { /* loop is ro, but wanted rw */
error_msg("WARNING: loop device is read-only");
flags |= MS_RDONLY;
}
}
#endif
status = mount(specialfile, dir, filesystemtype, flags, string_flags);
if (status < 0 && errno == EROFS) {
error_msg("%s is write-protected, mounting read-only", specialfile);
status = mount(specialfile, dir, filesystemtype, flags |= MS_RDONLY, string_flags);
}
/* Don't whine about already mounted filesystems when mounting all. */
if (status < 0 && errno == EBUSY && mount_all)
return TRUE;
}
/* If the mount was sucessful, do anything needed, then return TRUE */
if (status == 0 || fakeIt==TRUE) {
#if defined BB_FEATURE_MTAB_SUPPORT
if (useMtab) {
erase_mtab(specialfile); // Clean any stale entries
write_mtab(specialfile, dir, filesystemtype, flags, mtab_opts);
}
#endif
return (TRUE);
}
/* Bummer. mount failed. Clean up */
#if defined BB_FEATURE_MOUNT_LOOP
if (lofile != NULL) {
del_loop(specialfile);
}
#endif
if (errno == EPERM) {
error_msg_and_die("permission denied. Are you root?");
}
return (FALSE);
}