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c44a663d | 1 | /* Query filename corresponding to an open FD. Linux version. |
bfff8b1b | 2 | Copyright (C) 2001-2017 Free Software Foundation, Inc. |
c44a663d UD |
3 | This file is part of the GNU C Library. |
4 | ||
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. | |
c44a663d UD |
9 | |
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. |
c44a663d | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
c44a663d UD |
18 | |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <sys/stat.h> | |
eb96ffb0 | 22 | #include <_itoa.h> |
c44a663d UD |
23 | |
24 | static inline const char * | |
25 | fd_to_filename (int fd) | |
26 | { | |
27 | char *ret = malloc (30); | |
28 | ||
29 | if (ret != NULL) | |
30 | { | |
31 | struct stat64 st; | |
32 | ||
33 | *_fitoa_word (fd, __stpcpy (ret, "/proc/self/fd/"), 10, 0) = '\0'; | |
34 | ||
35 | /* We must make sure the file exists. */ | |
36 | if (__lxstat64 (_STAT_VER, ret, &st) < 0) | |
37 | { | |
38 | /* /proc is not mounted or something else happened. Don't | |
39 | return the file name. */ | |
40 | free (ret); | |
41 | ret = NULL; | |
42 | } | |
43 | } | |
44 | return ret; | |
45 | } |