posix/spawn_int.h

   1 /* Internal definitions for posix_spawn functionality.
   2    Copyright (C) 2000-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SPAWN_INT_H
  20 #define _SPAWN_INT_H
  21
  22 #include <spawn.h>
  23 #include <stdbool.h>
  24
  25 /* Data structure to contain the action information.  */
  26 struct __spawn_action
  27 {
  28   enum
  29   {
  30     spawn_do_close,
  31     spawn_do_dup2,
  32     spawn_do_open
  33   } tag;
  34
  35   union
  36   {
  37     struct
  38     {
  39       int fd;
  40     } close_action;
  41     struct
  42     {
  43       int fd;
  44       int newfd;
  45     } dup2_action;
  46     struct
  47     {
  48       int fd;
  49       char *path;
  50       int oflag;
  51       mode_t mode;
  52     } open_action;
  53   } action;
  54 };
  55
  56 #define SPAWN_XFLAGS_USE_PATH   0x1
  57 #define SPAWN_XFLAGS_TRY_SHELL  0x2
  58
  59 extern int __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *
  60                                                file_actions);
  61
  62 extern int __spawni (pid_t *pid, const char *path,
  63                      const posix_spawn_file_actions_t *file_actions,
  64                      const posix_spawnattr_t *attrp, char *const argv[],
  65                      char *const envp[], int xflags);
  66
  67 /* Return true if FD falls into the range valid for file descriptors.
  68    The check in this form is mandated by POSIX.  */
  69 bool __spawn_valid_fd (int fd) internal_function attribute_hidden;
  70
  71 #endif /* _SPAWN_INT_H */