1  /* Copyright (C) 2000-2023 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 <spawn.h>
      20  #include <unistd.h>
      21  
      22  #include "spawn_int.h"
      23  
      24  /* Add an action to FILE-ACTIONS which tells the implementation to call
      25     `close' for the given file descriptor during the `spawn' call.  */
      26  int
      27  __posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
      28  				     int fd)
      29  {
      30    struct __spawn_action *rec;
      31  
      32    if (!__spawn_valid_fd (fd))
      33      return EBADF;
      34  
      35    /* Allocate more memory if needed.  */
      36    if (file_actions->__used == file_actions->__allocated
      37        && __posix_spawn_file_actions_realloc (file_actions) != 0)
      38      /* This can only mean we ran out of memory.  */
      39      return ENOMEM;
      40  
      41    /* Add the new value.  */
      42    rec = &file_actions->__actions[file_actions->__used];
      43    rec->tag = spawn_do_close;
      44    rec->action.open_action.fd = fd;
      45  
      46    /* Account for the new entry.  */
      47    ++file_actions->__used;
      48  
      49    return 0;
      50  }
      51  weak_alias (__posix_spawn_file_actions_addclose,
      52  	    posix_spawn_file_actions_addclose)