1  /* Add a directory change to a file action list for posix_spawn.
       2     Copyright (C) 2000-2023 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 <spawn.h>
      21  #include <string.h>
      22  
      23  #include "spawn_int.h"
      24  
      25  int
      26  posix_spawn_file_actions_addfchdir_np (posix_spawn_file_actions_t *actions,
      27                                         int fd)
      28  {
      29    struct __spawn_action *rec;
      30  
      31    /* Allocate more memory if needed.  */
      32    if (actions->__used == actions->__allocated
      33        && __posix_spawn_file_actions_realloc (actions) != 0)
      34      /* This can only mean we ran out of memory.  */
      35      return ENOMEM;
      36  
      37    /* Add the new value.  */
      38    rec = &actions->__actions[actions->__used];
      39    rec->tag = spawn_do_fchdir;
      40    rec->action.fchdir_action.fd = fd;
      41  
      42    /* Account for the new entry.  */
      43    ++actions->__used;
      44  
      45    return 0;
      46  }