posix/spawn_int.h

   1 /* Internal definitions for posix_spawn functionality.
   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 #ifndef _SPAWN_INT_H
  20 #define _SPAWN_INT_H
  21
  22 #include <spawn.h>
  23 #include <spawn_int_def.h>
  24 #include <stdbool.h>
  25
  26 /* Data structure to contain the action information.  */
  27 struct __spawn_action
  28 {
  29   enum
  30   {
  31     spawn_do_close,
  32     spawn_do_dup2,
  33     spawn_do_open,
  34     spawn_do_chdir,
  35     spawn_do_fchdir,
  36     spawn_do_closefrom,
  37     spawn_do_tcsetpgrp
  38   } tag;
  39
  40   union
  41   {
  42     struct
  43     {
  44       int fd;
  45     } close_action;
  46     struct
  47     {
  48       int fd;
  49       int newfd;
  50     } dup2_action;
  51     struct
  52     {
  53       int fd;
  54       char *path;
  55       int oflag;
  56       mode_t mode;
  57     } open_action;
  58     struct
  59     {
  60       char *path;
  61     } chdir_action;
  62     struct
  63     {
  64       int fd;
  65     } fchdir_action;
  66     struct
  67     {
  68       int from;
  69     } closefrom_action;
  70     struct
  71     {
  72       int fd;
  73     } setpgrp_action;
  74   } action;
  75 };
  76
  77 #define SPAWN_XFLAGS_USE_PATH   0x1
  78 #define SPAWN_XFLAGS_TRY_SHELL  0x2
  79 #define SPAWN_XFLAGS_RET_PIDFD  0x4
  80
  81 extern int __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *
  82                                                file_actions)
  83      attribute_hidden;
  84
  85 extern int __spawni (int *pid, const char *path,
  86                      const posix_spawn_file_actions_t *file_actions,
  87                      const posix_spawnattr_t *attrp, char *const argv[],
  88                      char *const envp[], int xflags) attribute_hidden;
  89
  90 /* Return true if FD falls into the range valid for file descriptors.
  91    The check in this form is mandated by POSIX.  */
  92 bool __spawn_valid_fd (int fd) attribute_hidden;
  93
  94 #endif /* _SPAWN_INT_H */