Add POSIX routines called posix_spawn() and posix_spawnp(), which

can be used as replacements for exec/fork in a lot of cases. This
change also added execvpe() which allows environment variable
PATH to be used for searching executable file, it is used for
implementing posix_spawnp().

PR: standards/122051

1 files changed, 115 insertions, 0 deletions

diff --git a/include/spawn.h b/include/spawn.h
new file mode 100644
index 0000000..5783551
--- /dev/null
+++ b/include/spawn.h
@@ -0,0 +1,115 @@
+/*-
+ * Copyright (c) 2008 Ed Schouten <ed@80386.nl>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SPAWN_H_
+#define _SPAWN_H_
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+#include <sys/_sigset.h>
+
+#ifndef _MODE_T_DECLARED
+typedef	__mode_t	mode_t;
+#define	_MODE_T_DECLARED
+#endif
+
+#ifndef _PID_T_DECLARED
+typedef	__pid_t		pid_t;
+#define	_PID_T_DECLARED
+#endif
+
+#ifndef _SIGSET_T_DECLARED
+#define	_SIGSET_T_DECLARED
+typedef	__sigset_t	sigset_t;
+#endif
+
+struct sched_param;
+
+typedef struct __posix_spawnattr		*posix_spawnattr_t;
+typedef struct __posix_spawn_file_actions	*posix_spawn_file_actions_t;
+
+#define POSIX_SPAWN_RESETIDS		0x01
+#define POSIX_SPAWN_SETPGROUP		0x02
+#define POSIX_SPAWN_SETSCHEDPARAM	0x04
+#define POSIX_SPAWN_SETSCHEDULER	0x08
+#define POSIX_SPAWN_SETSIGDEF		0x10
+#define POSIX_SPAWN_SETSIGMASK		0x20
+
+__BEGIN_DECLS
+/*
+ * Spawn routines
+ */
+int posix_spawn(pid_t * __restrict, const char * __restrict,
+    const posix_spawn_file_actions_t *, const posix_spawnattr_t * __restrict,
+    char * const [__restrict], char * const [__restrict]);
+int posix_spawnp(pid_t * __restrict, const char * __restrict,
+    const posix_spawn_file_actions_t *, const posix_spawnattr_t * __restrict,
+    char * const [__restrict], char * const [__restrict]);
+
+/*
+ * File descriptor actions
+ */
+int posix_spawn_file_actions_init(posix_spawn_file_actions_t *);
+int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *);
+
+int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t * __restrict,
+    int, const char * __restrict, int, mode_t);
+int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *, int, int);
+int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *, int);
+
+/*
+ * Spawn attributes
+ */
+int posix_spawnattr_init(posix_spawnattr_t *);
+int posix_spawnattr_destroy(posix_spawnattr_t *);
+
+int posix_spawnattr_getflags(const posix_spawnattr_t * __restrict,
+    short * __restrict);
+int posix_spawnattr_getpgroup(const posix_spawnattr_t * __restrict,
+    pid_t * __restrict);
+int posix_spawnattr_getschedparam(const posix_spawnattr_t * __restrict,
+    struct sched_param * __restrict);
+int posix_spawnattr_getschedpolicy(const posix_spawnattr_t * __restrict,
+    int * __restrict);
+int posix_spawnattr_getsigdefault(const posix_spawnattr_t * __restrict,
+    sigset_t * __restrict);
+int posix_spawnattr_getsigmask(const posix_spawnattr_t * __restrict,
+    sigset_t * __restrict sigmask);
+
+int posix_spawnattr_setflags(posix_spawnattr_t *, short);
+int posix_spawnattr_setpgroup(posix_spawnattr_t *, pid_t);
+int posix_spawnattr_setschedparam(posix_spawnattr_t * __restrict,
+    const struct sched_param * __restrict);
+int posix_spawnattr_setschedpolicy(posix_spawnattr_t *, int);
+int posix_spawnattr_setsigdefault(posix_spawnattr_t * __restrict,
+    const sigset_t * __restrict);
+int posix_spawnattr_setsigmask(posix_spawnattr_t * __restrict,
+    const sigset_t * __restrict);
+__END_DECLS
+
+#endif /* !_SPAWN_H_ */