src/shared/libmount-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include <stdio.h>
   5
   6 /* This needs to be after sys/mount.h */
   7 #include <libmount.h>
   8
   9 #include "macro.h"
  10
  11 DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table*, mnt_free_table);
  12 DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter*, mnt_free_iter);
  13
  14 static inline int libmount_parse(
  15                 const char *path,
  16                 FILE *source,
  17                 struct libmnt_table **ret_table,
  18                 struct libmnt_iter **ret_iter) {
  19
  20         _cleanup_(mnt_free_tablep) struct libmnt_table *table = NULL;
  21         _cleanup_(mnt_free_iterp) struct libmnt_iter *iter = NULL;
  22         int r;
  23
  24         /* Older libmount seems to require this. */
  25         assert(!source || path);
  26
  27         table = mnt_new_table();
  28         iter = mnt_new_iter(MNT_ITER_FORWARD);
  29         if (!table || !iter)
  30                 return -ENOMEM;
  31
  32         /* If source or path are specified, we use on the functions which ignore utab.
  33          * Only if both are empty, we use mnt_table_parse_mtab(). */
  34
  35         if (source)
  36                 r = mnt_table_parse_stream(table, source, path);
  37         else if (path)
  38                 r = mnt_table_parse_file(table, path);
  39         else
  40                 r = mnt_table_parse_mtab(table, NULL);
  41         if (r < 0)
  42                 return r;
  43
  44         *ret_table = TAKE_PTR(table);
  45         *ret_iter = TAKE_PTR(iter);
  46         return 0;
  47 }