posix/spawn_faction_addtcsetpgrp_np.c

   1 /* Add tcsetpgrp to the file action list for posix_spawn.
   2    Copyright (C) 2022-2024 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 <unistd.h>
  22 #include <spawn_int.h>
  23
  24 int
  25 __posix_spawn_file_actions_addtcsetpgrp_np (posix_spawn_file_actions_t
  26                                             *file_actions, int tcfd)
  27 {
  28   struct __spawn_action *rec;
  29
  30   if (!__spawn_valid_fd (tcfd))
  31     return EBADF;
  32
  33   /* Allocate more memory if needed.  */
  34   if (file_actions->__used == file_actions->__allocated
  35       && __posix_spawn_file_actions_realloc (file_actions) != 0)
  36     /* This can only mean we ran out of memory.  */
  37     return ENOMEM;
  38
  39   /* Add the new value.  */
  40   rec = &file_actions->__actions[file_actions->__used];
  41   rec->tag = spawn_do_tcsetpgrp;
  42   rec->action.setpgrp_action.fd = tcfd;
  43
  44   /* Account for the new entry.  */
  45   ++file_actions->__used;
  46
  47   return 0;
  48 }
  49 weak_alias (__posix_spawn_file_actions_addtcsetpgrp_np,
  50             posix_spawn_file_actions_addtcsetpgrp_np)