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Commit | Line | Data |
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7a770247 | 1 | /* Utilities for reading/writing fstab, mtab, etc. |
2b778ceb | 2 | Copyright (C) 1995-2021 Free Software Foundation, Inc. |
19361cb7 | 3 | This file is part of the GNU C Library. |
7a770247 | 4 | |
19361cb7 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
7a770247 | 9 | |
19361cb7 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
7a770247 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
7a770247 RM |
18 | |
19 | #include <mntent.h> | |
1cab5444 | 20 | #include <stdlib.h> |
35ffd20d | 21 | #include <allocate_once.h> |
1cab5444 | 22 | |
35ffd20d FW |
23 | struct mntent_buffer |
24 | { | |
25 | struct mntent m; | |
26 | char buffer[4096]; | |
27 | }; | |
1cab5444 | 28 | |
35ffd20d FW |
29 | /* We don't want to allocate the static buffer all the time since it |
30 | is not always used (in fact, rather infrequently). */ | |
31 | libc_freeres_ptr (static void *mntent_buffer); | |
1cab5444 | 32 | |
35ffd20d FW |
33 | static void * |
34 | allocate (void *closure) | |
35 | { | |
36 | return malloc (sizeof (struct mntent_buffer)); | |
37 | } | |
1cab5444 UD |
38 | |
39 | static void | |
35ffd20d | 40 | deallocate (void *closure, void *ptr) |
1cab5444 | 41 | { |
35ffd20d | 42 | free (ptr); |
1cab5444 UD |
43 | } |
44 | ||
7a770247 RM |
45 | struct mntent * |
46 | getmntent (FILE *stream) | |
47 | { | |
35ffd20d FW |
48 | struct mntent_buffer *buffer = allocate_once (&mntent_buffer, |
49 | allocate, deallocate, NULL); | |
50 | if (buffer == NULL) | |
1cab5444 UD |
51 | /* If no core is available we don't have a chance to run the |
52 | program successfully and so returning NULL is an acceptable | |
53 | result. */ | |
54 | return NULL; | |
55 | ||
35ffd20d FW |
56 | return __getmntent_r (stream, &buffer->m, |
57 | buffer->buffer, sizeof (buffer->buffer)); | |
1cab5444 | 58 | } |