/**
* mnt_free_fs:
* @fs: fs pointer
*
* Deallocates the fs. This function does not care about reference count. Don't
* use this function directly -- it's better to use use mnt_unref_fs().
*
* The reference counting is supported since util-linux v2.24.
*/
void mnt_free_fs(struct libmnt_fs *fs)
{
if (!fs)
return;
DBG(FS, ul_debugobj(fs, "free [refcount=%d]", fs->refcount));
mnt_reset_fs(fs);
free(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 rc = -1;
int flags = 0;
pid_t tid = -1;
struct libmnt_fs *fs = NULL;
struct libmnt_parser pa = { .line = 0 };
assert(tb);
assert(f);
assert(filename);
DBG(TAB, ul_debugobj(tb, "%s: start parsing [entries=%d, filter=%s]",
filename, mnt_table_get_nents(tb),
tb->fltrcb ? "yes" : "not"));
pa.filename = filename;
pa.f = f;
/* 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)) {
if (!fs) {
fs = mnt_new_fs();
if (!fs)
goto err;
}
rc = mnt_table_parse_next(&pa, tb, fs);
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 (rc == 0 && tb->fmt == MNT_FMT_MOUNTINFO) {
rc = kernel_fs_postparse(tb, fs, &tid, filename);
if (rc)
mnt_table_remove_fs(tb, fs);
}
}
if (rc) {
if (rc > 0) {
mnt_reset_fs(fs);
assert(fs->refcount == 1);
continue; /* recoverable error, reuse fs*/
}
mnt_unref_fs(fs);
if (feof(f))
break;
goto err; /* fatal error */
}
mnt_unref_fs(fs);
fs = NULL;
}
DBG(TAB, ul_debugobj(tb, "%s: stop parsing (%d entries)",
filename, mnt_table_get_nents(tb)));
parser_cleanup(&pa);
return 0;
err:
DBG(TAB, ul_debugobj(tb, "%s: parse error (rc=%d)", filename, rc));
parser_cleanup(&pa);
return rc;
}
/**
* mnt_table_parse_file:
* @tb: tab pointer
* @filename: file
*
* Parses the whole table (e.g. /etc/fstab) and appends new records to the @tab.
*
* The libmount parser ignores broken (syntax error) lines, these lines are
* reported to the caller by the errcb() function (see mnt_table_set_parser_errcb()).
*
* Returns: 0 on success, negative number in case of error.
*/
int mnt_table_parse_file(struct libmnt_table *tb, const char *filename)
{
FILE *f;
int rc;
if (!filename || !tb)
return -EINVAL;
f = fopen(filename, "r" UL_CLOEXECSTR);
if (f) {
rc = mnt_table_parse_stream(tb, f, filename);
fclose(f);
} else
rc = -errno;
DBG(TAB, ul_debugobj(tb, "parsing done [filename=%s, rc=%d]", filename, rc));
return rc;
}
