221 lines
7.6 KiB
C
221 lines
7.6 KiB
C
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/* Definitions for POSIX spawn interface.
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Copyright (C) 2000-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SPAWN_H
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#define _SPAWN_H 1
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#include <features.h>
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#include <sched.h>
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#include <sys/types.h>
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#include <bits/types/sigset_t.h>
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/* Data structure to contain attributes for thread creation. */
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typedef struct
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{
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short int __flags;
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pid_t __pgrp;
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sigset_t __sd;
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sigset_t __ss;
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struct sched_param __sp;
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int __policy;
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int __pad[16];
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} posix_spawnattr_t;
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/* Data structure to contain information about the actions to be
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performed in the new process with respect to file descriptors. */
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typedef struct
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{
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int __allocated;
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int __used;
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struct __spawn_action *__actions;
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int __pad[16];
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} posix_spawn_file_actions_t;
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/* Flags to be set in the `posix_spawnattr_t'. */
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#define POSIX_SPAWN_RESETIDS 0x01
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#define POSIX_SPAWN_SETPGROUP 0x02
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#define POSIX_SPAWN_SETSIGDEF 0x04
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#define POSIX_SPAWN_SETSIGMASK 0x08
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#define POSIX_SPAWN_SETSCHEDPARAM 0x10
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#define POSIX_SPAWN_SETSCHEDULER 0x20
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#ifdef __USE_GNU
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# define POSIX_SPAWN_USEVFORK 0x40
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# define POSIX_SPAWN_SETSID 0x80
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#endif
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__BEGIN_DECLS
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/* Spawn a new process executing PATH with the attributes describes in *ATTRP.
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Before running the process perform the actions described in FILE-ACTIONS.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern int posix_spawn (pid_t *__restrict __pid,
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const char *__restrict __path,
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const posix_spawn_file_actions_t *__restrict
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__file_actions,
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const posix_spawnattr_t *__restrict __attrp,
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char *const __argv[__restrict_arr],
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char *const __envp[__restrict_arr])
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__nonnull ((2, 5));
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/* Similar to `posix_spawn' but search for FILE in the PATH.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern int posix_spawnp (pid_t *__pid, const char *__file,
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const posix_spawn_file_actions_t *__file_actions,
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const posix_spawnattr_t *__attrp,
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char *const __argv[], char *const __envp[])
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__nonnull ((2, 5));
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/* Initialize data structure with attributes for `spawn' to default values. */
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extern int posix_spawnattr_init (posix_spawnattr_t *__attr)
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__THROW __nonnull ((1));
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/* Free resources associated with ATTR. */
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extern int posix_spawnattr_destroy (posix_spawnattr_t *__attr)
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__THROW __nonnull ((1));
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/* Store signal mask for signals with default handling from ATTR in
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SIGDEFAULT. */
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extern int posix_spawnattr_getsigdefault (const posix_spawnattr_t *
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__restrict __attr,
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sigset_t *__restrict __sigdefault)
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__THROW __nonnull ((1, 2));
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/* Set signal mask for signals with default handling in ATTR to SIGDEFAULT. */
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extern int posix_spawnattr_setsigdefault (posix_spawnattr_t *__restrict __attr,
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const sigset_t *__restrict
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__sigdefault)
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__THROW __nonnull ((1, 2));
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/* Store signal mask for the new process from ATTR in SIGMASK. */
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extern int posix_spawnattr_getsigmask (const posix_spawnattr_t *__restrict
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__attr,
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sigset_t *__restrict __sigmask)
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__THROW __nonnull ((1, 2));
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/* Set signal mask for the new process in ATTR to SIGMASK. */
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extern int posix_spawnattr_setsigmask (posix_spawnattr_t *__restrict __attr,
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const sigset_t *__restrict __sigmask)
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__THROW __nonnull ((1, 2));
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/* Get flag word from the attribute structure. */
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extern int posix_spawnattr_getflags (const posix_spawnattr_t *__restrict
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__attr,
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short int *__restrict __flags)
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__THROW __nonnull ((1, 2));
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/* Store flags in the attribute structure. */
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extern int posix_spawnattr_setflags (posix_spawnattr_t *_attr,
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short int __flags)
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__THROW __nonnull ((1));
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/* Get process group ID from the attribute structure. */
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extern int posix_spawnattr_getpgroup (const posix_spawnattr_t *__restrict
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__attr, pid_t *__restrict __pgroup)
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__THROW __nonnull ((1, 2));
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/* Store process group ID in the attribute structure. */
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extern int posix_spawnattr_setpgroup (posix_spawnattr_t *__attr,
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pid_t __pgroup)
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__THROW __nonnull ((1));
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/* Get scheduling policy from the attribute structure. */
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extern int posix_spawnattr_getschedpolicy (const posix_spawnattr_t *
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__restrict __attr,
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int *__restrict __schedpolicy)
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__THROW __nonnull ((1, 2));
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/* Store scheduling policy in the attribute structure. */
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extern int posix_spawnattr_setschedpolicy (posix_spawnattr_t *__attr,
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int __schedpolicy)
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__THROW __nonnull ((1));
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/* Get scheduling parameters from the attribute structure. */
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extern int posix_spawnattr_getschedparam (const posix_spawnattr_t *
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__restrict __attr,
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struct sched_param *__restrict
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__schedparam)
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__THROW __nonnull ((1, 2));
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/* Store scheduling parameters in the attribute structure. */
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extern int posix_spawnattr_setschedparam (posix_spawnattr_t *__restrict __attr,
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const struct sched_param *
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__restrict __schedparam)
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__THROW __nonnull ((1, 2));
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/* Initialize data structure for file attribute for `spawn' call. */
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extern int posix_spawn_file_actions_init (posix_spawn_file_actions_t *
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__file_actions)
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__THROW __nonnull ((1));
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/* Free resources associated with FILE-ACTIONS. */
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extern int posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *
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__file_actions)
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__THROW __nonnull ((1));
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/* Add an action to FILE-ACTIONS which tells the implementation to call
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`open' for the given file during the `spawn' call. */
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extern int posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *
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__restrict __file_actions,
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int __fd,
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const char *__restrict __path,
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int __oflag, mode_t __mode)
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__THROW __nonnull ((1, 3));
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/* Add an action to FILE-ACTIONS which tells the implementation to call
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`close' for the given file descriptor during the `spawn' call. */
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extern int posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *
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__file_actions, int __fd)
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__THROW __nonnull ((1));
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/* Add an action to FILE-ACTIONS which tells the implementation to call
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`dup2' for the given file descriptors during the `spawn' call. */
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extern int posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *
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__file_actions,
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int __fd, int __newfd)
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__THROW __nonnull ((1));
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#ifdef __USE_GNU
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/* Add an action changing the directory to PATH during spawn. This
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affects the subsequent file actions. */
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extern int posix_spawn_file_actions_addchdir_np (posix_spawn_file_actions_t *
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__restrict __actions,
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const char *__restrict __path)
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__THROW __nonnull ((1, 2));
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/* Add an action changing the directory to FD during spawn. This
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affects the subsequent file actions. FD is not duplicated and must
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be open when the file action is executed. */
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extern int posix_spawn_file_actions_addfchdir_np (posix_spawn_file_actions_t *,
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int __fd)
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__THROW __nonnull ((1));
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#endif
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__END_DECLS
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#endif /* spawn.h */
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