/**
* mnt_table_set_cache:
* @tb: pointer to tab
* @mpc: pointer to struct libmnt_cache instance
*
* Sets up a cache for canonicalized paths and evaluated tags (LABEL/UUID). The
* cache is recommended for mnt_table_find_*() functions.
*
* The cache could be shared between more tabs. Be careful when you share the
* same cache between more threads -- currently the cache does not provide any
* locking method.
*
* This function increments cache reference counter. It's recommended to use
* mnt_unref_cache() after mnt_table_set_cache() if you want to keep the cache
* referenced by @tb only.
*
* See also mnt_new_cache().
*
* Returns: 0 on success or negative number in case of error.
*/
int mnt_table_set_cache(struct libmnt_table *tb, struct libmnt_cache *mpc)
{
if (!tb)
return -EINVAL;
mnt_ref_cache(mpc); /* new */
mnt_unref_cache(tb->cache); /* old */
tb->cache = mpc;
return 0;
}
int test_read_tags(struct libmnt_test *ts, int argc, char *argv[])
{
char line[BUFSIZ];
struct libmnt_cache *cache;
size_t i;
cache = mnt_new_cache();
if (!cache)
return -ENOMEM;
while(fgets(line, sizeof(line), stdin)) {
size_t sz = strlen(line);
char *t = NULL, *v = NULL;
if (sz > 0 && line[sz - 1] == '\n')
line[sz - 1] = '\0';
if (!strcmp(line, "quit"))
break;
if (*line == '/') {
if (mnt_cache_read_tags(cache, line) < 0)
fprintf(stderr, "%s: read tags failed\n", line);
} else if (blkid_parse_tag_string(line, &t, &v) == 0) {
const char *cn = NULL;
if (mnt_valid_tagname(t))
cn = cache_find_tag(cache, t, v);
free(t);
free(v);
if (cn)
printf("%s: %s\n", line, cn);
else
printf("%s: not cached\n", line);
}
}
for (i = 0; i < cache->nents; i++) {
struct mnt_cache_entry *e = &cache->ents[i];
if (!(e->flag & MNT_CACHE_ISTAG))
continue;
printf("%15s : %5s : %s\n", e->value, e->key,
e->key + strlen(e->key) + 1);
}
mnt_unref_cache(cache);
return 0;
}
/**
* mnt_free_table:
* @tb: tab pointer
*
* Deallocates the table. This function does not care about reference count. Don't
* use this function directly -- it's better to use use mnt_unref_table().
*
* The table entries (filesystems) are unrefrenced by mnt_reset_table() and
* cache by mnt_unref_cache().
*/
void mnt_free_table(struct libmnt_table *tb)
{
if (!tb)
return;
mnt_reset_table(tb);
DBG(TAB, ul_debugobj(tb, "free [refcount=%d]", tb->refcount));
mnt_unref_cache(tb->cache);
free(tb->comm_intro);
free(tb->comm_tail);
free(tb);
}
static int dir_to_device(struct mountpoint_control *ctl)
{
struct libmnt_table *tb = mnt_new_table_from_file(_PATH_PROC_MOUNTINFO);
struct libmnt_fs *fs;
struct libmnt_cache *cache;
int rc = -1;
if (!tb) {
/*
* Fallback. Traditional way to detect mountpoints. This way
* is independent on /proc, but not able to detect bind mounts.
*/
struct stat pst;
char buf[PATH_MAX], *cn;
int len;
cn = mnt_resolve_path(ctl->path, NULL); /* canonicalize */
len = snprintf(buf, sizeof(buf), "%s/..", cn ? cn : ctl->path);
free(cn);
if (len < 0 || (size_t) len >= sizeof(buf))
return -1;
if (stat(buf, &pst) !=0)
return -1;
if ((ctl->st.st_dev != pst.st_dev) ||
(ctl->st.st_dev == pst.st_dev && ctl->st.st_ino == pst.st_ino)) {
ctl->dev = ctl->st.st_dev;
return 0;
}
return -1;
}
/* to canonicalize all necessary paths */
cache = mnt_new_cache();
mnt_table_set_cache(tb, cache);
mnt_unref_cache(cache);
fs = mnt_table_find_target(tb, ctl->path, MNT_ITER_BACKWARD);
if (fs && mnt_fs_get_target(fs)) {
ctl->dev = mnt_fs_get_devno(fs);
rc = 0;
}
mnt_unref_table(tb);
return rc;
}
/*
* See if device has been mounted by looking in mount table. If so, set
* device name and mount point name, and return 1, otherwise return 0.
*/
static int device_get_mountpoint(char **devname, char **mnt)
{
struct libmnt_fs *fs;
int rc;
*mnt = NULL;
if (!mtab) {
struct libmnt_cache *cache;
mtab = mnt_new_table();
if (!mtab)
err(EXIT_FAILURE, _("failed to initialize libmount table"));
cache = mnt_new_cache();
mnt_table_set_cache(mtab, cache);
mnt_unref_cache(cache);
if (p_option)
rc = mnt_table_parse_file(mtab, _PATH_PROC_MOUNTINFO);
else
rc = mnt_table_parse_mtab(mtab, NULL);
if (rc)
err(EXIT_FAILURE, _("failed to parse mount table"));
}
fs = mnt_table_find_source(mtab, *devname, MNT_ITER_BACKWARD);
if (!fs) {
/* maybe 'devname' is mountpoint rather than a real device */
fs = mnt_table_find_target(mtab, *devname, MNT_ITER_BACKWARD);
if (fs) {
free(*devname);
*devname = xstrdup(mnt_fs_get_source(fs));
}
}
if (fs)
*mnt = xstrdup(mnt_fs_get_target(fs));
return *mnt ? 0 : -1;
}
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;
}
int main(int argc, char *argv[])
{
int status = 0, c;
size_t i;
static const struct option long_opts[] = {
{ "all", 0, 0, 'a' },
{ "help", 0, 0, 'h' },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
{ NULL, 0, 0, 0 }
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((c = getopt_long(argc, argv, "ahvVL:U:",
long_opts, NULL)) != -1) {
switch (c) {
case 'a': /* all */
++all;
break;
case 'h': /* help */
usage(stdout);
break;
case 'v': /* be chatty */
++verbose;
break;
case 'V': /* version */
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
case 'L':
add_label(optarg);
break;
case 'U':
add_uuid(optarg);
break;
case '?':
default:
usage(stderr);
}
}
argv += optind;
if (!all && !numof_labels() && !numof_uuids() && *argv == NULL)
usage(stderr);
mnt_init_debug(0);
mntcache = mnt_new_cache();
for (i = 0; i < numof_labels(); i++)
status |= swapoff_by("LABEL", get_label(i), !QUIET);
for (i = 0; i < numof_uuids(); i++)
status |= swapoff_by("UUID", get_uuid(i), !QUIET);
while (*argv != NULL)
status |= do_swapoff(*argv++, !QUIET, !CANONIC);
if (all)
status |= swapoff_all();
free_tables();
mnt_unref_cache(mntcache);
return status;
}
