static int update_remove_entry(struct libmnt_update *upd, struct libmnt_lock *lc)
{
struct libmnt_table *tb;
int rc = 0;
assert(upd);
assert(upd->target);
DBG(UPDATE, mnt_debug_h(upd, "%s: remove entry", upd->filename));
if (lc)
rc = mnt_lock_file(lc);
if (rc)
return rc;
tb = __mnt_new_table_from_file(upd->filename,
upd->userspace_only ? MNT_FMT_UTAB : MNT_FMT_MTAB);
if (tb) {
struct libmnt_fs *rem = mnt_table_find_target(tb, upd->target, MNT_ITER_BACKWARD);
if (rem) {
mnt_table_remove_fs(tb, rem);
rc = update_table(upd, tb);
mnt_free_fs(rem);
}
}
if (lc)
mnt_unlock_file(lc);
mnt_free_table(tb);
return rc;
}
/**
* mnt_unref_fs:
* @fs: fs pointer
*
* De-increments reference counter, on zero the @fs is automatically
* deallocated by mnt_free_fs().
*/
void mnt_unref_fs(struct libmnt_fs *fs)
{
if (fs) {
fs->refcount--;
/*DBG(FS, ul_debugobj(fs, "unref=%d", fs->refcount));*/
if (fs->refcount <= 0)
mnt_free_fs(fs);
}
}
/**
* mnt_table_parse_stream:
* @tb: tab pointer
* @f: file stream
* @filename: filename used for debug and error messages
*
* Returns: 0 on success, negative number in case of error.
*/
int mnt_table_parse_stream(struct libmnt_table *tb, FILE *f, const char *filename)
{
int nlines = 0;
int rc = -1;
int flags = 0;
pid_t tid = -1;
assert(tb);
assert(f);
assert(filename);
DBG(TAB, mnt_debug_h(tb, "%s: start parsing (%d entries)",
filename, mnt_table_get_nents(tb)));
/* necessary for /proc/mounts only, the /proc/self/mountinfo
* parser sets the flag properly
*/
if (filename && strcmp(filename, _PATH_PROC_MOUNTS) == 0)
flags = MNT_FS_KERNEL;
while (!feof(f)) {
struct libmnt_fs *fs = mnt_new_fs();
if (!fs)
goto err;
rc = mnt_table_parse_next(tb, f, fs, filename, &nlines);
if (!rc && tb->fltrcb && tb->fltrcb(fs, tb->fltrcb_data))
rc = 1; /* filtered out by callback... */
if (!rc) {
rc = mnt_table_add_fs(tb, fs);
fs->flags |= flags;
if (tb->fmt == MNT_FMT_MOUNTINFO && filename) {
if (tid == -1)
tid = path_to_tid(filename);
fs->tid = tid;
}
}
if (rc) {
mnt_free_fs(fs);
if (rc == 1)
continue; /* recoverable error */
if (feof(f))
break;
goto err; /* fatal error */
}
}
DBG(TAB, mnt_debug_h(tb, "%s: stop parsing (%d entries)",
filename, mnt_table_get_nents(tb)));
return 0;
err:
DBG(TAB, mnt_debug_h(tb, "%s: parse error (rc=%d)", filename, rc));
return rc;
}
static struct libmnt_fs *add_dummy_fs(const char *device)
{
struct libmnt_fs *fs = mnt_new_fs();
if (fs && mnt_fs_set_source(fs, device) == 0 &&
mnt_table_add_fs(fstab, fs) == 0)
return fs;
mnt_free_fs(fs);
err(FSCK_EX_ERROR, _("failed to setup description for %s"), device);
}
/**
* mnt_free_update:
* @upd: update
*
* Deallocates struct libmnt_update handler.
*/
void mnt_free_update(struct libmnt_update *upd)
{
if (!upd)
return;
DBG(UPDATE, mnt_debug_h(upd, "free"));
mnt_free_fs(upd->fs);
mnt_free_table(upd->mountinfo);
free(upd->target);
free(upd->filename);
free(upd);
}
static int test_remount(struct libmnt_test *ts, int argc, char *argv[])
{
struct libmnt_fs *fs = mnt_new_fs();
int rc;
if (argc < 3)
return -1;
mnt_fs_set_target(fs, argv[1]);
mnt_fs_set_options(fs, argv[2]);
rc = update(NULL, fs, MS_REMOUNT);
mnt_free_fs(fs);
return rc;
}
static int test_move(struct libmnt_test *ts, int argc, char *argv[])
{
struct libmnt_fs *fs = mnt_new_fs();
int rc;
if (argc < 3)
return -1;
mnt_fs_set_source(fs, argv[1]);
mnt_fs_set_target(fs, argv[2]);
rc = update(NULL, fs, MS_MOVE);
mnt_free_fs(fs);
return rc;
}
/**
* mnt_reset_table:
* @tb: tab pointer
*
* Dealocates all entries (filesystems) from the table
*
* Returns: 0 on success or negative number in case of error.
*/
int mnt_reset_table(struct libmnt_table *tb)
{
if (!tb)
return -EINVAL;
DBG(TAB, mnt_debug_h(tb, "reset"));
while (!list_empty(&tb->ents)) {
struct libmnt_fs *fs = list_entry(tb->ents.next,
struct libmnt_fs, ents);
mnt_free_fs(fs);
}
tb->nents = 0;
return 0;
}
static int test_add(struct libmnt_test *ts, int argc, char *argv[])
{
struct libmnt_fs *fs = mnt_new_fs();
int rc;
if (argc < 5 || !fs)
return -1;
mnt_fs_set_source(fs, argv[1]);
mnt_fs_set_target(fs, argv[2]);
mnt_fs_set_fstype(fs, argv[3]);
mnt_fs_set_options(fs, argv[4]);
rc = update(NULL, fs, 0);
mnt_free_fs(fs);
return rc;
}
int main(const int argc, const char* argv[]) {
if (argc == 2) {
if (strcmp(argv[1], "--verbose") == 0) {
verbose_mode = 1;
}
}
prepare();
clearSupplementaryGroups();
selfCheck();
struct libmnt_table* mt = mnt_new_table_from_file("/opt/xware_desktop/mounts");
if (mt == NULL) {
fprintf(stderr, "mnt_new_table_from_file failed.\n");
exit(EXIT_FAILURE);
}
struct libmnt_iter* itr = mnt_new_iter(MNT_ITER_FORWARD);
struct libmnt_fs* fs = NULL;
while(1) {
int tmp = mnt_table_find_next_fs(mt, itr, &matchAll, NULL, &fs);
if (tmp < 0) { // error
fprintf(stderr, "mnt_table_find_next_fs failed.\n");
break;
} else {
if (tmp == 1) { // reach EOF
break;
}
const char* target = mnt_fs_get_target(fs);
if (target == NULL) {
fprintf(stderr, "mnt_fs_get_target failed.\n");
} else {
printf("%s%s%s\n", BOLD, target, NOSTYLE);
printf("================================\n");
if (checkDirXPermissions(target)) {
checkTargetDirPermissions(target);
}
printf("\n");
}
}
}
printf("%s", NOSTYLE);
mnt_free_fs(fs);
mnt_free_iter(itr);
mnt_free_table(mt);
return 0;
}
/*
* 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) {
mtab = mnt_new_table();
if (!mtab)
err(EXIT_FAILURE, _("failed to initialize libmount table"));
cache = mnt_new_cache();
mnt_table_set_cache(mtab, 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));
/* We'll call umount(), so remove the filesystem from the table
* to avoid duplicate results in the next device_get_mountpoint()
* call */
mnt_free_fs(fs);
}
return *mnt ? 0 : -1;
}
static inline void mnt_free_fsp(struct libmnt_fs **itr) {
if (*itr)
mnt_free_fs(*itr);
*itr=NULL;
}
/*
* Allocates utab entry (upd->fs) for mount/remount. This function should be
* called *before* mount(2) syscall. The @fs is used as a read-only template.
*
* Returns: 0 on success, negative number on error, 1 if utabs update is
* unnecessary.
*/
static int utab_new_entry(struct libmnt_update *upd, struct libmnt_fs *fs,
unsigned long mountflags)
{
int rc = 0;
const char *o = NULL, *a = NULL;
char *u = NULL;
assert(fs);
assert(upd);
assert(upd->fs == NULL);
assert(!(mountflags & MS_MOVE));
DBG(UPDATE, mnt_debug("prepare utab entry"));
o = mnt_fs_get_user_options(fs);
a = mnt_fs_get_attributes(fs);
upd->fs = NULL;
if (o) {
/* remove non-mtab options */
rc = mnt_optstr_get_options(o, &u,
mnt_get_builtin_optmap(MNT_USERSPACE_MAP),
MNT_NOMTAB);
if (rc)
goto err;
}
if (!u && !a) {
DBG(UPDATE, mnt_debug("utab entry unnecessary (no options)"));
return 1;
}
/* allocate the entry */
upd->fs = mnt_copy_fs(NULL, fs);
if (!upd->fs) {
rc = -ENOMEM;
goto err;
}
rc = mnt_fs_set_options(upd->fs, u);
if (rc)
goto err;
rc = mnt_fs_set_attributes(upd->fs, a);
if (rc)
goto err;
if (!(mountflags & MS_REMOUNT)) {
rc = set_fs_root(upd, fs, mountflags);
if (rc)
goto err;
}
free(u);
DBG(UPDATE, mnt_debug("utab entry OK"));
return 0;
err:
free(u);
mnt_free_fs(upd->fs);
upd->fs = NULL;
return rc;
}
/**
* mnt_update_set_fs:
* @upd: update handler
* @mountflags: MS_* flags
* @target: umount target, must be NULL for mount
* @fs: mount filesystem description, must be NULL for umount
*
* Returns: <0 in case on error, 0 on success, 1 if update is unnecessary.
*/
int mnt_update_set_fs(struct libmnt_update *upd, unsigned long mountflags,
const char *target, struct libmnt_fs *fs)
{
int rc;
assert(upd);
assert(target || fs);
if (!upd)
return -EINVAL;
if ((mountflags & MS_MOVE) && (!fs || !mnt_fs_get_srcpath(fs)))
return -EINVAL;
if (target && fs)
return -EINVAL;
DBG(UPDATE, mnt_debug_h(upd,
"reseting FS [fs=0x%p, target=%s, flags=0x%08lx]",
fs, target, mountflags));
if (fs) {
DBG(UPDATE, mnt_debug_h(upd, "FS template:"));
DBG(UPDATE, mnt_fs_print_debug(fs, stderr));
}
mnt_free_fs(upd->fs);
free(upd->target);
upd->ready = FALSE;
upd->fs = NULL;
upd->target = NULL;
upd->mountflags = 0;
if (mountflags & MS_PROPAGATION)
return 1;
upd->mountflags = mountflags;
rc = mnt_update_set_filename(upd, NULL, 0);
if (rc) {
DBG(UPDATE, mnt_debug_h(upd, "no writable file available [rc=%d]", rc));
return rc; /* error or no file available (rc = 1) */
}
if (target) {
upd->target = strdup(target);
if (!upd->target)
return -ENOMEM;
} else if (fs) {
if (upd->userspace_only && !(mountflags & MS_MOVE)) {
int rc = utab_new_entry(upd, fs, mountflags);
if (rc)
return rc;
} else {
upd->fs = mnt_copy_mtab_fs(fs);
if (!upd->fs)
return -ENOMEM;
}
}
DBG(UPDATE, mnt_debug_h(upd, "ready"));
upd->ready = TRUE;
return 0;
}
