spawn.h
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上传日期:2009-04-28
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- /* Definitions for POSIX spawn interface.
- Copyright (C) 2000, 2003, 2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _SPAWN_H
- #define _SPAWN_H 1
- #include <features.h>
- #include <sched.h>
- #include <signal.h>
- #include <sys/types.h>
- /* Data structure to contain attributes for thread creation. */
- typedef struct
- {
- short int __flags;
- pid_t __pgrp;
- sigset_t __sd;
- sigset_t __ss;
- struct sched_param __sp;
- int __policy;
- int __pad[16];
- } posix_spawnattr_t;
- /* Data structure to contain information about the actions to be
- performed in the new process with respect to file descriptors. */
- typedef struct
- {
- int __allocated;
- int __used;
- struct __spawn_action *__actions;
- int __pad[16];
- } posix_spawn_file_actions_t;
- /* Flags to be set in the `posix_spawnattr_t'. */
- #define POSIX_SPAWN_RESETIDS 0x01
- #define POSIX_SPAWN_SETPGROUP 0x02
- #define POSIX_SPAWN_SETSIGDEF 0x04
- #define POSIX_SPAWN_SETSIGMASK 0x08
- #define POSIX_SPAWN_SETSCHEDPARAM 0x10
- #define POSIX_SPAWN_SETSCHEDULER 0x20
- #ifdef __USE_GNU
- # define POSIX_SPAWN_USEVFORK 0x40
- #endif
- __BEGIN_DECLS
- /* Spawn a new process executing PATH with the attributes describes in *ATTRP.
- Before running the process perform the actions described in FILE-ACTIONS.
- This function is a possible cancellation points and therefore not
- marked with __THROW. */
- extern int posix_spawn (pid_t *__restrict __pid,
- __const char *__restrict __path,
- __const posix_spawn_file_actions_t *__restrict
- __file_actions,
- __const posix_spawnattr_t *__restrict __attrp,
- char *__const argv[__restrict_arr],
- char *__const envp[__restrict_arr]);
- /* Similar to `posix_spawn' but search for FILE in the PATH.
- This function is a possible cancellation points and therefore not
- marked with __THROW. */
- extern int posix_spawnp (pid_t *__pid, __const char *__file,
- __const posix_spawn_file_actions_t *__file_actions,
- __const posix_spawnattr_t *__attrp,
- char *__const argv[], char *__const envp[]);
- /* Initialize data structure with attributes for `spawn' to default values. */
- extern int posix_spawnattr_init (posix_spawnattr_t *__attr) __THROW;
- /* Free resources associated with ATTR. */
- extern int posix_spawnattr_destroy (posix_spawnattr_t *__attr) __THROW;
- /* Store signal mask for signals with default handling from ATTR in
- SIGDEFAULT. */
- extern int posix_spawnattr_getsigdefault (__const posix_spawnattr_t *
- __restrict __attr,
- sigset_t *__restrict __sigdefault)
- __THROW;
- /* Set signal mask for signals with default handling in ATTR to SIGDEFAULT. */
- extern int posix_spawnattr_setsigdefault (posix_spawnattr_t *__restrict __attr,
- __const sigset_t *__restrict
- __sigdefault)
- __THROW;
- /* Store signal mask for the new process from ATTR in SIGMASK. */
- extern int posix_spawnattr_getsigmask (__const posix_spawnattr_t *__restrict
- __attr,
- sigset_t *__restrict __sigmask) __THROW;
- /* Set signal mask for the new process in ATTR to SIGMASK. */
- extern int posix_spawnattr_setsigmask (posix_spawnattr_t *__restrict __attr,
- __const sigset_t *__restrict __sigmask)
- __THROW;
- /* Get flag word from the attribute structure. */
- extern int posix_spawnattr_getflags (__const posix_spawnattr_t *__restrict
- __attr,
- short int *__restrict __flags) __THROW;
- /* Store flags in the attribute structure. */
- extern int posix_spawnattr_setflags (posix_spawnattr_t *_attr,
- short int __flags) __THROW;
- /* Get process group ID from the attribute structure. */
- extern int posix_spawnattr_getpgroup (__const posix_spawnattr_t *__restrict
- __attr, pid_t *__restrict __pgroup)
- __THROW;
- /* Store process group ID in the attribute structure. */
- extern int posix_spawnattr_setpgroup (posix_spawnattr_t *__attr,
- pid_t __pgroup) __THROW;
- /* Get scheduling policy from the attribute structure. */
- extern int posix_spawnattr_getschedpolicy (__const posix_spawnattr_t *
- __restrict __attr,
- int *__restrict __schedpolicy)
- __THROW;
- /* Store scheduling policy in the attribute structure. */
- extern int posix_spawnattr_setschedpolicy (posix_spawnattr_t *__attr,
- int __schedpolicy) __THROW;
- /* Get scheduling parameters from the attribute structure. */
- extern int posix_spawnattr_getschedparam (__const posix_spawnattr_t *
- __restrict __attr,
- struct sched_param *__restrict
- __schedparam) __THROW;
- /* Store scheduling parameters in the attribute structure. */
- extern int posix_spawnattr_setschedparam (posix_spawnattr_t *__restrict __attr,
- const struct sched_param *
- __restrict __schedparam) __THROW;
- /* Initialize data structure for file attribute for `spawn' call. */
- extern int posix_spawn_file_actions_init (posix_spawn_file_actions_t *
- __file_actions) __THROW;
- /* Free resources associated with FILE-ACTIONS. */
- extern int posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *
- __file_actions) __THROW;
- /* Add an action to FILE-ACTIONS which tells the implementation to call
- `open' for the given file during the `spawn' call. */
- extern int posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *
- __restrict __file_actions,
- int __fd,
- __const char *__restrict __path,
- int __oflag, mode_t __mode)
- __THROW;
- /* Add an action to FILE-ACTIONS which tells the implementation to call
- `close' for the given file descriptor during the `spawn' call. */
- extern int posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *
- __file_actions, int __fd)
- __THROW;
- /* Add an action to FILE-ACTIONS which tells the implementation to call
- `dup2' for the given file descriptors during the `spawn' call. */
- extern int posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *
- __file_actions,
- int __fd, int __newfd) __THROW;
- __END_DECLS
- #endif /* spawn.h */