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76a50749 UD |
1 | /* Copyright (C) 2002 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
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. | |
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 | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <semaphore.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include "semaphoreP.h" | |
26 | ||
27 | ||
28 | int | |
29 | sem_unlink (name) | |
30 | const char *name; | |
31 | { | |
32 | char *fname; | |
33 | size_t namelen; | |
34 | ||
35 | /* Determine where the shmfs is mounted. */ | |
bdb04f92 | 36 | INTUSE(__pthread_once) (&__namedsem_once, __where_is_shmfs); |
76a50749 UD |
37 | |
38 | /* If we don't know the mount points there is nothing we can do. Ever. */ | |
39 | if (mountpoint.dir == NULL) | |
40 | { | |
41 | __set_errno (ENOSYS); | |
42 | return -1; | |
43 | } | |
44 | ||
45 | /* Construct the filename. */ | |
46 | while (name[0] == '/') | |
47 | ++name; | |
48 | ||
49 | if (name[0] == '\0') | |
50 | { | |
51 | /* The name "/" is not supported. */ | |
52 | __set_errno (ENOENT); | |
53 | return -1; | |
54 | } | |
55 | namelen = strlen (name); | |
56 | ||
57 | /* Create the name of the file. */ | |
58 | fname = (char *) alloca (mountpoint.dirlen + namelen + 1); | |
59 | __mempcpy (__mempcpy (fname, mountpoint.dir, mountpoint.dirlen), | |
60 | name, namelen + 1); | |
61 | ||
62 | /* Now try removing it. */ | |
63 | return unlink (fname); | |
64 | } |