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/* 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 */
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