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Viewing: /usr/include/spawn.h
/* Definitions for POSIX spawn interface.
Copyright (C) 2000-2021 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, see
<https://www.gnu.org/licenses/>. */
#ifndef _SPAWN_H
#define _SPAWN_H 1
#include <features.h>
#include <sched.h>
#include <sys/types.h>
#include <bits/types/sigset_t.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
# define POSIX_SPAWN_SETSID 0x80
#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 point 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])
__nonnull ((2, 5));
/* Similar to `posix_spawn' but search for FILE in the PATH.
This function is a possible cancellation point 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[])
__nonnull ((2, 5));
/* Initialize data structure with attributes for `spawn' to default values. */
extern int posix_spawnattr_init (posix_spawnattr_t *__attr)
__THROW __nonnull ((1));
/* Free resources associated with ATTR. */
extern int posix_spawnattr_destroy (posix_spawnattr_t *__attr)
__THROW __nonnull ((1));
/* 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 __nonnull ((1, 2));
/* 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 __nonnull ((1, 2));
/* 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 __nonnull ((1, 2));
/* 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 __nonnull ((1, 2));
/* Get flag word from the attribute structure. */
extern int posix_spawnattr_getflags (const posix_spawnattr_t *__restrict
__attr,
short int *__restrict __flags)
__THROW __nonnull ((1, 2));
/* Store flags in the attribute structure. */
extern int posix_spawnattr_setflags (posix_spawnattr_t *_attr,
short int __flags)
__THROW __nonnull ((1));
/* Get process group ID from the attribute structure. */
extern int posix_spawnattr_getpgroup (const posix_spawnattr_t *__restrict
__attr, pid_t *__restrict __pgroup)
__THROW __nonnull ((1, 2));
/* Store process group ID in the attribute structure. */
extern int posix_spawnattr_setpgroup (posix_spawnattr_t *__attr,
pid_t __pgroup)
__THROW __nonnull ((1));
/* Get scheduling policy from the attribute structure. */
extern int posix_spawnattr_getschedpolicy (const posix_spawnattr_t *
__restrict __attr,
int *__restrict __schedpolicy)
__THROW __nonnull ((1, 2));
/* Store scheduling policy in the attribute structure. */
extern int posix_spawnattr_setschedpolicy (posix_spawnattr_t *__attr,
int __schedpolicy)
__THROW __nonnull ((1));
/* Get scheduling parameters from the attribute structure. */
extern int posix_spawnattr_getschedparam (const posix_spawnattr_t *
__restrict __attr,
struct sched_param *__restrict
__schedparam)
__THROW __nonnull ((1, 2));
/* Store scheduling parameters in the attribute structure. */
extern int posix_spawnattr_setschedparam (posix_spawnattr_t *__restrict __attr,
const struct sched_param *
__restrict __schedparam)
__THROW __nonnull ((1, 2));
/* Initialize data structure for file attribute for `spawn' call. */
extern int posix_spawn_file_actions_init (posix_spawn_file_actions_t *
__file_actions)
__THROW __nonnull ((1));
/* Free resources associated with FILE-ACTIONS. */
extern int posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *
__file_actions)
__THROW __nonnull ((1));
/* 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 __nonnull ((1, 3));
/* 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 __nonnull ((1));
/* 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 __nonnull ((1));
#ifdef __USE_MISC
/* Add an action changing the directory to PATH during spawn. This
affects the subsequent file actions. */
extern int posix_spawn_file_actions_addchdir_np (posix_spawn_file_actions_t *
__restrict __actions,
const char *__restrict __path)
__THROW __nonnull ((1, 2));
/* Add an action changing the directory to FD during spawn. This
affects the subsequent file actions. FD is not duplicated and must
be open when the file action is executed. */
extern int posix_spawn_file_actions_addfchdir_np (posix_spawn_file_actions_t *,
int __fd)
__THROW __nonnull ((1));
/* Add an action to close all file descriptor greater than or equal to FROM
during spawn. This affects the subsequent file actions. */
extern int
posix_spawn_file_actions_addclosefrom_np (posix_spawn_file_actions_t *,
int __from)
__THROW __nonnull ((1));
/* Add an action to set the process group of the forground process group
associated with the terminal TCFD. */
extern int
posix_spawn_file_actions_addtcsetpgrp_np (posix_spawn_file_actions_t *,
int __tcfd)
__THROW __nonnull ((1));
#endif /* __USE_MISC */
__END_DECLS
#endif /* spawn.h */