1 /* Definitions for POSIX spawn interface. 2 Copyright (C) 2000,2003,2004,2009,2011,2012 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_H 20 #define _SPAWN_H 1 21 22 #include <features.h> 23 #include <sched.h> 24 #define __need_sigset_t 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 #ifdef __USE_GNU 61 # define POSIX_SPAWN_USEVFORK 0x40 62 #endif 63 64 65 __BEGIN_DECLS 66 67 /* Spawn a new process executing PATH with the attributes describes in *ATTRP. 68 Before running the process perform the actions described in FILE-ACTIONS. 69 70 This function is a possible cancellation point and therefore not 71 marked with __THROW. */ 72 extern int posix_spawn (pid_t *__restrict __pid, 73 const char *__restrict __path, 74 const posix_spawn_file_actions_t *__restrict 75 __file_actions, 76 const posix_spawnattr_t *__restrict __attrp, 77 char *const __argv[__restrict_arr], 78 char *const __envp[__restrict_arr]); 79 80 /* Similar to `posix_spawn' but search for FILE in the PATH. 81 82 This function is a possible cancellation point and therefore not 83 marked with __THROW. */ 84 extern int posix_spawnp (pid_t *__pid, const char *__file, 85 const posix_spawn_file_actions_t *__file_actions, 86 const posix_spawnattr_t *__attrp, 87 char *const __argv[], char *const __envp[]); 88 89 90 /* Initialize data structure with attributes for `spawn' to default values. */ 91 extern int posix_spawnattr_init (posix_spawnattr_t *__attr) __THROW; 92 93 /* Free resources associated with ATTR. */ 94 extern int posix_spawnattr_destroy (posix_spawnattr_t *__attr) __THROW; 95 96 /* Store signal mask for signals with default handling from ATTR in 97 SIGDEFAULT. */ 98 extern int posix_spawnattr_getsigdefault (const posix_spawnattr_t * 99 __restrict __attr, 100 sigset_t *__restrict __sigdefault) 101 __THROW; 102 103 /* Set signal mask for signals with default handling in ATTR to SIGDEFAULT. */ 104 extern int posix_spawnattr_setsigdefault (posix_spawnattr_t *__restrict __attr, 105 const sigset_t *__restrict 106 __sigdefault) 107 __THROW; 108 109 /* Store signal mask for the new process from ATTR in SIGMASK. */ 110 extern int posix_spawnattr_getsigmask (const posix_spawnattr_t *__restrict 111 __attr, 112 sigset_t *__restrict __sigmask) __THROW; 113 114 /* Set signal mask for the new process in ATTR to SIGMASK. */ 115 extern int posix_spawnattr_setsigmask (posix_spawnattr_t *__restrict __attr, 116 const sigset_t *__restrict __sigmask) 117 __THROW; 118 119 /* Get flag word from the attribute structure. */ 120 extern int posix_spawnattr_getflags (const posix_spawnattr_t *__restrict 121 __attr, 122 short int *__restrict __flags) __THROW; 123 124 /* Store flags in the attribute structure. */ 125 extern int posix_spawnattr_setflags (posix_spawnattr_t *_attr, 126 short int __flags) __THROW; 127 128 /* Get process group ID from the attribute structure. */ 129 extern int posix_spawnattr_getpgroup (const posix_spawnattr_t *__restrict 130 __attr, pid_t *__restrict __pgroup) 131 __THROW; 132 133 /* Store process group ID in the attribute structure. */ 134 extern int posix_spawnattr_setpgroup (posix_spawnattr_t *__attr, 135 pid_t __pgroup) __THROW; 136 137 /* Get scheduling policy from the attribute structure. */ 138 extern int posix_spawnattr_getschedpolicy (const posix_spawnattr_t * 139 __restrict __attr, 140 int *__restrict __schedpolicy) 141 __THROW; 142 143 /* Store scheduling policy in the attribute structure. */ 144 extern int posix_spawnattr_setschedpolicy (posix_spawnattr_t *__attr, 145 int __schedpolicy) __THROW; 146 147 /* Get scheduling parameters from the attribute structure. */ 148 extern int posix_spawnattr_getschedparam (const posix_spawnattr_t * 149 __restrict __attr, 150 struct sched_param *__restrict 151 __schedparam) __THROW; 152 153 /* Store scheduling parameters in the attribute structure. */ 154 extern int posix_spawnattr_setschedparam (posix_spawnattr_t *__restrict __attr, 155 const struct sched_param * 156 __restrict __schedparam) __THROW; 157 158 159 /* Initialize data structure for file attribute for `spawn' call. */ 160 extern int posix_spawn_file_actions_init (posix_spawn_file_actions_t * 161 __file_actions) __THROW; 162 163 /* Free resources associated with FILE-ACTIONS. */ 164 extern int posix_spawn_file_actions_destroy (posix_spawn_file_actions_t * 165 __file_actions) __THROW; 166 167 /* Add an action to FILE-ACTIONS which tells the implementation to call 168 `open' for the given file during the `spawn' call. */ 169 extern int posix_spawn_file_actions_addopen (posix_spawn_file_actions_t * 170 __restrict __file_actions, 171 int __fd, 172 const char *__restrict __path, 173 int __oflag, mode_t __mode) 174 __THROW; 175 176 /* Add an action to FILE-ACTIONS which tells the implementation to call 177 `close' for the given file descriptor during the `spawn' call. */ 178 extern int posix_spawn_file_actions_addclose (posix_spawn_file_actions_t * 179 __file_actions, int __fd) 180 __THROW; 181 182 /* Add an action to FILE-ACTIONS which tells the implementation to call 183 `dup2' for the given file descriptors during the `spawn' call. */ 184 extern int posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t * 185 __file_actions, 186 int __fd, int __newfd) __THROW; 187 188 __END_DECLS 189 190 #endif /* spawn.h */ 191