/*
* fs from fstab might contains real device name as well as symlink,
* LABEL or UUID, this function returns canonicalized result.
*/
static const char *fs_get_device(struct libmnt_fs *fs)
{
struct fsck_fs_data *data = mnt_fs_get_userdata(fs);
if (!data || !data->eval_device) {
const char *spec = mnt_fs_get_source(fs);
if (!data)
data = fs_create_data(fs);
data->eval_device = 1;
data->device = mnt_resolve_spec(spec, mnt_table_get_cache(fstab));
if (!data->device)
data->device = xstrdup(spec);
}
return data->device;
}
int test_resolve_spec(struct libmnt_test *ts, int argc, char *argv[])
{
char line[BUFSIZ];
struct libmnt_cache *cache;
cache = mnt_new_cache();
if (!cache)
return -ENOMEM;
while(fgets(line, sizeof(line), stdin)) {
size_t sz = strlen(line);
char *p;
if (sz > 0 && line[sz - 1] == '\n')
line[sz - 1] = '\0';
p = mnt_resolve_spec(line, cache);
printf("%s : %s\n", line, p);
}
mnt_unref_cache(cache);
return 0;
}
static int kernel_fs_postparse(struct libmnt_table *tb,
struct libmnt_fs *fs, pid_t *tid,
const char *filename)
{
int rc = 0;
const char *src = mnt_fs_get_srcpath(fs);
/* This is a filesystem description from /proc, so we're in some process
* namespace. Let's remember the process PID.
*/
if (filename && *tid == -1)
*tid = path_to_tid(filename);
fs->tid = *tid;
/*
* Convert obscure /dev/root to something more usable
*/
if (src && strcmp(src, "/dev/root") == 0) {
char *spec = mnt_get_kernel_cmdline_option("root=");
char *real = NULL;
DBG(TAB, mnt_debug_h(tb, "root FS: %s", spec));
if (spec)
real = mnt_resolve_spec(spec, tb->cache);
if (real) {
DBG(TAB, mnt_debug_h(tb, "canonical root FS: %s", real));
rc = mnt_fs_set_source(fs, real);
if (!tb->cache)
free(real);
}
free(spec);
}
return rc;
}
/*
* this has to be called before fix_optstr()
*/
static int evaluate_permissions(struct libmnt_context *cxt)
{
unsigned long u_flags = 0;
assert(cxt);
assert(cxt->fs);
assert((cxt->flags & MNT_FL_MOUNTFLAGS_MERGED));
if (!cxt)
return -EINVAL;
if (!cxt->fs)
return 0;
DBG(CXT, mnt_debug_h(cxt, "mount: evaluating permissions"));
mnt_context_get_user_mflags(cxt, &u_flags);
if (!mnt_context_is_restricted(cxt)) {
/*
* superuser mount
*/
cxt->user_mountflags &= ~MNT_MS_OWNER;
cxt->user_mountflags &= ~MNT_MS_GROUP;
cxt->user_mountflags &= ~MNT_MS_USER;
cxt->user_mountflags &= ~MNT_MS_USERS;
} else {
/*
* user mount
*/
if (!(cxt->flags & MNT_FL_TAB_APPLIED))
{
DBG(CXT, mnt_debug_h(cxt, "perms: fstab not applied, ignore user mount"));
return -EPERM;
}
/*
* Note that MS_OWNERSECURE and MS_SECURE mount options
* are applied by mnt_optstr_get_flags() from mnt_context_merge_mflags()
*/
/*
* MS_OWNER: Allow owners to mount when fstab contains the
* owner option. Note that this should never be used in a high
* security environment, but may be useful to give people at
* the console the possibility of mounting a floppy. MS_GROUP:
* Allow members of device group to mount. (Martin Dickopp)
*/
if (u_flags & (MNT_MS_OWNER | MNT_MS_GROUP)) {
struct stat sb;
struct libmnt_cache *cache = NULL;
char *xsrc = NULL;
const char *srcpath = mnt_fs_get_srcpath(cxt->fs);
if (!srcpath) { /* Ah... source is TAG */
cache = mnt_context_get_cache(cxt);
xsrc = mnt_resolve_spec(
mnt_context_get_source(cxt),
cache);
srcpath = xsrc;
}
if (!srcpath) {
DBG(CXT, mnt_debug_h(cxt, "perms: src undefined"));
return -EPERM;
}
if (strncmp(srcpath, "/dev/", 5) == 0 &&
stat(srcpath, &sb) == 0 &&
(((u_flags & MNT_MS_OWNER) && getuid() == sb.st_uid) ||
((u_flags & MNT_MS_GROUP) && mnt_in_group(sb.st_gid))))
cxt->user_mountflags |= MNT_MS_USER;
if (!cache)
free(xsrc);
}
if (!(cxt->user_mountflags & (MNT_MS_USER | MNT_MS_USERS))) {
DBG(CXT, mnt_debug_h(cxt, "permissions evaluation ends with -EPERMS"));
return -EPERM;
}
}
return 0;
}
/* main program */
int main(int argc, char **argv)
{
char *device = NULL;
char *disk = NULL;
char *mountpoint = NULL;
int worked = 0; /* set to 1 when successfully ejected */
int fd; /* file descriptor for device */
setlocale(LC_ALL,"");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
/* parse the command line arguments */
parse_args(argc, argv, &device);
/* handle -d option */
if (d_option) {
info(_("default device: `%s'"), EJECT_DEFAULT_DEVICE);
return EXIT_SUCCESS;
}
if (!device) {
device = mnt_resolve_path(EJECT_DEFAULT_DEVICE, NULL);
verbose(_("using default device `%s'"), device);
} else {
char *p;
if (device[strlen(device)-1] == '/')
device[strlen(device)-1] = '\0';
/* figure out full device or mount point name */
p = find_device(device);
if (p)
free(device);
else
p = device;
device = mnt_resolve_spec(p, NULL);
free(p);
}
if (!device)
errx(EXIT_FAILURE, _("%s: unable to find device"), device);
verbose(_("device name is `%s'"), device);
device_get_mountpoint(&device, &mountpoint);
if (mountpoint)
verbose(_("%s: mounted on %s"), device, mountpoint);
else
verbose(_("%s: not mounted"), device);
disk = get_disk_devname(device);
if (disk) {
verbose(_("%s: disc device: %s (disk device will be used for eject)"), device, disk);
free(device);
device = disk;
disk = NULL;
} else {
struct stat st;
if (stat(device, &st) != 0 || !S_ISBLK(st.st_mode))
errx(EXIT_FAILURE, _("%s: not found mountpoint or device "
"with the given name"), device);
verbose(_("%s: is whole-disk device"), device);
}
if (F_option == 0 && is_hotpluggable(device) == 0)
errx(EXIT_FAILURE, _("%s: is not hot-pluggable device"), device);
/* handle -n option */
if (n_option) {
info(_("device is `%s'"), device);
verbose(_("exiting due to -n/--noop option"));
return EXIT_SUCCESS;
}
/* handle -i option */
if (i_option) {
fd = open_device(device);
manual_eject(fd, i_arg);
return EXIT_SUCCESS;
}
/* handle -a option */
if (a_option) {
if (a_arg)
verbose(_("%s: enabling auto-eject mode"), device);
else
verbose(_("%s: disabling auto-eject mode"), device);
fd = open_device(device);
auto_eject(fd, a_arg);
return EXIT_SUCCESS;
}
/* handle -t option */
if (t_option) {
verbose(_("%s: closing tray"), device);
fd = open_device(device);
close_tray(fd);
set_device_speed(device);
return EXIT_SUCCESS;
}
/* handle -T option */
if (T_option) {
verbose(_("%s: toggling tray"), device);
fd = open_device(device);
toggle_tray(fd);
set_device_speed(device);
return EXIT_SUCCESS;
}
/* handle -X option */
if (X_option) {
verbose(_("%s: listing CD-ROM speed"), device);
fd = open_device(device);
list_speeds(device, fd);
return EXIT_SUCCESS;
}
/* handle -x option only */
if (!c_option)
set_device_speed(device);
/*
* Unmount all partitions if -m is not specified; or umount given
* mountpoint if -M is specified, otherwise print error of another
* partition is mounted.
*/
if (!m_option) {
int ct = umount_partitions(device, M_option);
if (ct == 0 && mountpoint)
umount_one(mountpoint); /* probably whole-device */
if (M_option) {
if (ct == 1 && mountpoint)
umount_one(mountpoint);
else if (ct)
errx(EXIT_FAILURE, _("error: %s: device in use"), device);
}
}
/* handle -c option */
if (c_option) {
verbose(_("%s: selecting CD-ROM disc #%ld"), device, c_arg);
fd = open_device(device);
changer_select(fd, c_arg);
set_device_speed(device);
return EXIT_SUCCESS;
}
/* if user did not specify type of eject, try all four methods */
if (r_option + s_option + f_option + q_option == 0)
r_option = s_option = f_option = q_option = 1;
/* open device */
fd = open_device(device);
/* try various methods of ejecting until it works */
if (r_option) {
verbose(_("%s: trying to eject using CD-ROM eject command"), device);
worked = eject_cdrom(fd);
verbose(worked ? _("CD-ROM eject command succeeded") :
_("CD-ROM eject command failed"));
}
if (s_option && !worked) {
verbose(_("%s: trying to eject using SCSI commands"), device);
worked = eject_scsi(fd);
verbose(worked ? _("SCSI eject succeeded") :
_("SCSI eject failed"));
}
if (f_option && !worked) {
verbose(_("%s: trying to eject using floppy eject command"), device);
worked = eject_floppy(fd);
verbose(worked ? _("floppy eject command succeeded") :
_("floppy eject command failed"));
}
if (q_option && !worked) {
verbose(_("%s: trying to eject using tape offline command"), device);
worked = eject_tape(fd);
verbose(worked ? _("tape offline command succeeded") :
_("tape offline command failed"));
}
if (!worked)
errx(EXIT_FAILURE, _("unable to eject"));
/* cleanup */
close(fd);
free(device);
free(mountpoint);
mnt_unref_table(mtab);
return EXIT_SUCCESS;
}
