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