/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/proc/posix_spawn.h"
#include "libc/proc/posix_spawn.internal.h"

/**
 * Add a dup2 action to object.
 *
 * @param file_actions was initialized by posix_spawn_file_actions_init()
 * @return 0 on success, or errno on error
 * @raise EBADF if 'fildes' or `newfildes` is negative
 * @raise ENOMEM if insufficient memory was available
 */
int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *file_actions,
                                     int fildes, int newfildes) {
  if (fildes < 0 || newfildes < 0)
    return EBADF;
  return __posix_spawn_add_file_action(file_actions,
                                       (struct _posix_faction){
                                           .action = _POSIX_SPAWN_DUP2,
                                           .fildes = fildes,
                                           .newfildes = newfildes,
                                       });
}
