rt/shm_unlink.c

   1 /* shm_unlink -- remove a POSIX shared memory object.  Generic POSIX version.
   2    Copyright (C) 2001-2023 Free Software Foundation, Inc.
   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
   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, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <shlib-compat.h>
  21 #include <shm-directory.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 /* Remove shared memory object.  */
  26 int
  27 __shm_unlink (const char *name)
  28 {
  29   struct shmdir_name dirname;
  30   if (__shm_get_name (&dirname, name, false) != 0)
  31     {
  32       __set_errno (ENOENT);
  33       return -1;
  34     }
  35
  36   int result = __unlink (dirname.name);
  37   if (result < 0 && errno == EPERM)
  38     __set_errno (EACCES);
  39   return result;
  40 }
  41 versioned_symbol (libc, __shm_unlink, shm_unlink, GLIBC_2_34);
  42
  43 #if OTHER_SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_34)
  44 compat_symbol (libc, __shm_unlink, shm_unlink, GLIBC_2_2);
  45 #endif