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authorIsmael Luceno <ismael.luceno@gmail.com>2012-03-05 06:43:49 -0200
committerMike Frysinger <vapier@gentoo.org>2012-03-25 01:45:23 -0400
commit0dcf66744f533e160232072bd03273ca1c448879 (patch)
tree3658f9d75614bede75cfd49e00da4e73da2e8436 /include
parentd1bc0c9915e3b1db796f4466de6167c0a0f0f108 (diff)
librt: add posix_spawn support
Signed-off-by: Ismael Luceno <ismael.luceno@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'include')
-rw-r--r--include/spawn.h266
1 files changed, 266 insertions, 0 deletions
diff --git a/include/spawn.h b/include/spawn.h
new file mode 100644
index 000000000..8b07bb800
--- /dev/null
+++ b/include/spawn.h
@@ -0,0 +1,266 @@
+/* Definitions for POSIX spawn interface.
+ Copyright (C) 2000,2003,2004,2009,2011,2012 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
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SPAWN_H
+#define _SPAWN_H 1
+
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <features.h>
+#include <sched.h>
+#define __need_sigset_t
+#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
+#define POSIX_SPAWN_USEVFORK 0x40 /* GNU extension */
+
+
+#define __POSIX_SPAWN_MASK (POSIX_SPAWN_RESETIDS \
+ | POSIX_SPAWN_SETPGROUP \
+ | POSIX_SPAWN_SETSIGDEF \
+ | POSIX_SPAWN_SETSIGMASK \
+ | POSIX_SPAWN_SETSCHEDPARAM \
+ | POSIX_SPAWN_SETSCHEDULER \
+ | POSIX_SPAWN_USEVFORK)
+
+__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. */
+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],
+ char * const envp[restrict]);
+
+/* Similar to `posix_spawn' but search for FILE in the PATH.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
+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. */
+inline static int
+posix_spawnattr_init(posix_spawnattr_t *attr)
+{
+ memset(attr, 0, sizeof(*attr));
+ return 0;
+}
+
+/* Free resources associated with ATTR. */
+inline static int
+posix_spawnattr_destroy(posix_spawnattr_t *attr)
+{
+ return 0;
+}
+
+/* Store signal mask for signals with default handling from ATTR in
+ SIGDEFAULT. */
+inline static int
+posix_spawnattr_getsigdefault(const posix_spawnattr_t *attr,
+ sigset_t *sigdefault)
+{
+ memcpy(sigdefault, &attr->__sd, sizeof(sigset_t));
+ return 0;
+}
+
+
+/* Set signal mask for signals with default handling in ATTR to SIGDEFAULT. */
+inline static int
+posix_spawnattr_setsigdefault(posix_spawnattr_t *attr,
+ const sigset_t *sigdefault)
+{
+ memcpy(&attr->__sd, sigdefault, sizeof(sigset_t));
+ return 0;
+}
+
+/* Store signal mask for the new process from ATTR in SIGMASK. */
+inline static int
+posix_spawnattr_getsigmask(const posix_spawnattr_t *attr,
+ sigset_t *sigmask)
+{
+ memcpy(sigmask, &attr->__ss, sizeof(sigset_t));
+ return 0;
+}
+
+
+/* Set signal mask for the new process in ATTR to SIGMASK. */
+inline static int
+posix_spawnattr_setsigmask(posix_spawnattr_t *attr,
+ const sigset_t *sigmask)
+{
+ memcpy(&attr->__ss, sigmask, sizeof(sigset_t));
+ return 0;
+}
+
+/* Get flag word from the attribute structure. */
+inline static int
+posix_spawnattr_getflags(const posix_spawnattr_t *attr, short int *flags)
+{
+ *flags = attr->__flags;
+ return 0;
+}
+
+/* Store flags in the attribute structure. */
+inline static int
+posix_spawnattr_setflags(posix_spawnattr_t *attr, short int flags)
+{
+ /* Check no invalid bits are set. */
+ if (flags & ~__POSIX_SPAWN_MASK)
+ return EINVAL;
+
+ attr->__flags = flags;
+ return 0;
+}
+
+/* Get process group ID from the attribute structure. */
+inline static int
+posix_spawnattr_getpgroup(const posix_spawnattr_t *attr, pid_t *pgroup)
+{
+ *pgroup = attr->__pgrp;
+ return 0;
+}
+
+/* Store process group ID in the attribute structure. */
+inline static int
+posix_spawnattr_setpgroup(posix_spawnattr_t *attr, pid_t pgroup)
+{
+ attr->__pgrp = pgroup;
+ return 0;
+}
+
+/* Get scheduling policy from the attribute structure. */
+inline static int
+posix_spawnattr_getschedpolicy(const posix_spawnattr_t *attr,
+ int *schedpolicy)
+{
+ *schedpolicy = attr->__policy;
+ return 0;
+}
+
+/* Store scheduling policy in the attribute structure. */
+inline static int
+posix_spawnattr_setschedpolicy(posix_spawnattr_t *attr, int schedpolicy)
+{
+ switch (schedpolicy) {
+ case SCHED_OTHER:
+ case SCHED_FIFO:
+ case SCHED_RR:
+ break;
+ default:
+ return EINVAL;
+ }
+
+ attr->__policy = schedpolicy;
+ return 0;
+}
+
+/* Get scheduling parameters from the attribute structure. */
+static inline int
+posix_spawnattr_getschedparam(const posix_spawnattr_t *attr,
+ struct sched_param *schedparam)
+{
+ memcpy(schedparam, &attr->__sp, sizeof(attr->__sp));
+ return 0;
+}
+
+/* Store scheduling parameters in the attribute structure. */
+static inline int
+posix_spawnattr_setschedparam(posix_spawnattr_t *attr,
+ const struct sched_param *schedparam)
+{
+ attr->__sp = *schedparam;
+ return 0;
+}
+
+/* Initialize data structure for file attribute for `spawn' call. */
+inline static int
+posix_spawn_file_actions_init(posix_spawn_file_actions_t *file_actions)
+{
+ memset(file_actions, 0, sizeof(*file_actions));
+ return 0;
+}
+
+/* Free resources associated with FILE-ACTIONS. */
+inline static int
+posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *file_actions)
+{
+ free(file_actions->__actions);
+ return 0;
+}
+
+/* Add an action to FILE-ACTIONS which tells the implementation to call
+ `open' for the given file during the `spawn' call. */
+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. */
+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. */
+int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *file_actions,
+ int fd, int newfd) __THROW;
+
+__END_DECLS
+
+#endif /* spawn.h */