sysdeps/pthread/sem_unlink.c

   1 /* Copyright (C) 2002-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <semaphore.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23 #include "semaphoreP.h"
  24 #include <shm-directory.h>
  25
  26 #if !PTHREAD_IN_LIBC
  27 /* The private name is not exported from libc.  */
  28 # define __unlink unlink
  29 #endif
  30
  31 int
  32 __sem_unlink (const char *name)
  33 {
  34   struct shmdir_name dirname;
  35   if (__shm_get_name (&dirname, name, true) != 0)
  36     {
  37       __set_errno (ENOENT);
  38       return -1;
  39     }
  40
  41   /* Now try removing it.  */
  42   int ret = __unlink (dirname.name);
  43   if (ret < 0 && errno == EPERM)
  44     __set_errno (EACCES);
  45   return ret;
  46 }
  47 #if PTHREAD_IN_LIBC
  48 versioned_symbol (libc, __sem_unlink, sem_unlink, GLIBC_2_34);
  49 # if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1_1, GLIBC_2_34)
  50 compat_symbol (libpthread, __sem_unlink, sem_unlink, GLIBC_2_1_1);
  51 # endif
  52 #else /* !PTHREAD_IN_LIBC */
  53 strong_alias (__sem_unlink, sem_unlink)
  54 #endif