posix/spawn.h

   1 /* Definitions for POSIX spawn interface.
   2    Copyright (C) 2000 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _SPAWN_H
  21 #define _SPAWN_H        1
  22
  23 #include <features.h>
  24 #include <sched.h>
  25 #include <signal.h>
  26 #include <sys/types.h>
  27
  28
  29 /* Data structure to contain attributes for thread creation.  */
  30 typedef struct
  31 {
  32   short int __flags;
  33   pid_t __pgrp;
  34   sigset_t __sd;
  35   sigset_t __ss;
  36   struct sched_param __sp;
  37   int __policy;
  38   int __pad[16];
  39 } posix_spawnattr_t;
  40
  41
  42 /* Data structure to contain information about the actions to be
  43    performed in the new process with respect to file descriptors.  */
  44 typedef struct
  45 {
  46   int __allocated;
  47   int __used;
  48   struct __spawn_action *__actions;
  49   int __pad[16];
  50 } posix_spawn_file_actions_t;
  51
  52
  53 /* Flags to be set in the `posix_spawnattr_t'.  */
  54 #define POSIX_SPAWN_RESETIDS            0x01
  55 #define POSIX_SPAWN_SETPGROUP           0x02
  56 #define POSIX_SPAWN_SETSIGDEF           0x04
  57 #define POSIX_SPAWN_SETSIGMASK          0x08
  58 #define POSIX_SPAWN_SETSCHEDPARAM       0x10
  59 #define POSIX_SPAWN_SETSCHEDULER        0x20
  60
  61
  62 __BEGIN_DECLS
  63
  64 /* Spawn a new process executing PATH with the attributes describes in *ATTRP.
  65    Before running the process perform the actions described in FILE-ACTIONS. */
  66 extern int posix_spawn (pid_t *__pid, __const char *__path,
  67                         __const posix_spawn_file_actions_t *__file_actions,
  68                         __const posix_spawnattr_t *__attrp,
  69                         char *__const argv[], char *__const envp[]) __THROW;
  70
  71 /* Similar to `posix_spawn' but search for FILE in the PATH.  */
  72 extern int posix_spawnp (pid_t *__pid, __const char *__file,
  73                          __const posix_spawn_file_actions_t *__file_actions,
  74                          __const posix_spawnattr_t *__attrp,
  75                          char *__const argv[], char *__const envp[]) __THROW;
  76
  77
  78 /* Initialize data structure with attributes for `spawn' to default values.  */
  79 extern int posix_spawnattr_init (posix_spawnattr_t *__attr) __THROW;
  80
  81 /* Free resources associated with ATTR.  */
  82 extern int posix_spawnattr_destroy (posix_spawnattr_t *__attr) __THROW;
  83
  84 /* Store signal mask for signals with default handling from ATTR in
  85    SIGDEFAULT.  */
  86 extern int posix_spawnattr_getsigdefault (__const posix_spawnattr_t *__attr,
  87                                           sigset_t *__sigdefault) __THROW;
  88
  89 /* Set signal mask for signals with default handling in ATTR to SIGDEFAULT.  */
  90 extern int posix_spawnattr_setsigdefault (posix_spawnattr_t *__attr,
  91                                           __const sigset_t *__sigdefault)
  92      __THROW;
  93
  94 /* Store signal mask for the new process from ATTR in SIGMASK.  */
  95 extern int posix_spawnattr_getsigmask (__const posix_spawnattr_t *__attr,
  96                                        sigset_t *__sigmask) __THROW;
  97
  98 /* Set signal mask for the new process in ATTR to SIGMASK.  */
  99 extern int posix_spawnattr_setsigmask (posix_spawnattr_t *__attr,
 100                                        __const sigset_t *__sigmask) __THROW;
 101
 102 /* Get flag word from the attribute structure.  */
 103 extern int posix_spawnattr_getflags (__const posix_spawnattr_t *__attr,
 104                                      short int *__flags) __THROW;
 105
 106 /* Store flags in the attribute structure.  */
 107 extern int posix_spawnattr_setflags (posix_spawnattr_t *_attr,
 108                                      short int __flags) __THROW;
 109
 110 /* Get process group ID from the attribute structure.  */
 111 extern int posix_spawnattr_getpgroup (__const posix_spawnattr_t *__attr,
 112                                       pid_t *__pgroup) __THROW;
 113
 114 /* Store process group ID in the attribute structure.  */
 115 extern int posix_spawnattr_setpgroup (posix_spawnattr_t *__attr,
 116                                       pid_t __pgroup) __THROW;
 117
 118 /* Get scheduling policy from the attribute structure.  */
 119 extern int posix_spawnattr_getschedpolicy (__const posix_spawnattr_t *__attr,
 120                                            int *__schedpolicy) __THROW;
 121
 122 /* Store scheduling policy in the attribute structure.  */
 123 extern int posix_spawnattr_setschedpolicy (posix_spawnattr_t *__attr,
 124                                            int __schedpolicy) __THROW;
 125
 126
 127 /* Initialize data structure for file attribute for `spawn' call.  */
 128 extern int posix_spawn_file_actions_init (posix_spawn_file_actions_t *
 129                                           __file_actions) __THROW;
 130
 131 /* Free resources associated with FILE-ACTIONS.  */
 132 extern int posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *
 133                                              __file_actions) __THROW;
 134
 135 /* Add an action to FILE-ACTIONS which tells the implementation to call
 136    `open' for the given file during the `spawn' call.  */
 137 extern int posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *
 138                                              __file_actions,
 139                                              int __fd, __const char *__path,
 140                                              int __oflag, mode_t __mode)
 141      __THROW;
 142
 143 /* Add an action to FILE-ACTIONS which tells the implementation to call
 144    `close' for the given file descriptor during the `spawn' call.  */
 145 extern int posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *
 146                                               __file_actions, int __fd)
 147      __THROW;
 148
 149 /* Add an action to FILE-ACTIONS which tells the implementation to call
 150    `dup2' for the given file descriptors during the `spawn' call.  */
 151 extern int posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *
 152                                              __file_actions,
 153                                              int __fd, int __newfd) __THROW;
 154
 155 __END_DECLS
 156
 157 #endif /* spawn.h */