spawn.h(0P)		   POSIX Programmer's Manual		   spawn.h(0P)

PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the corresponding
       Linux manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       spawn.h — spawn (ADVANCED REALTIME)

SYNOPSIS
       #include <spawn.h>

DESCRIPTION
       The <spawn.h> header shall define the posix_spawnattr_t and
       posix_spawn_file_actions_t types used in performing spawn operations.

       The <spawn.h> header shall define the mode_t and pid_t types as
       described in <sys/types.h>.

       The <spawn.h> header shall define the sigset_t type as described in
       <signal.h>.

       The tag sched_param shall be declared as naming an incomplete structure
       type, the contents of which are described in the <sched.h> header.

       The <spawn.h> header shall define the following symbolic constants for
       use as the flags that may be set in a posix_spawnattr_t object using
       the posix_spawnattr_setflags() function:

       POSIX_SPAWN_RESETIDS
       POSIX_SPAWN_SETPGROUP
       POSIX_SPAWN_SETSCHEDPARAM
       POSIX_SPAWN_SETSCHEDULER
       POSIX_SPAWN_SETSIGDEF
       POSIX_SPAWN_SETSIGMASK

       The following shall be declared as functions and may also be defined as
       macros. Function prototypes shall be provided.


	   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_spawn_file_actions_addclose(posix_spawn_file_actions_t *,
		     int);
	   int	 posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *,
		     int, int);
	   int	 posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *restrict,
		     int, const char *restrict, int, mode_t);
	   int	 posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *);
	   int	 posix_spawn_file_actions_init(posix_spawn_file_actions_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);
	   int	 posix_spawnattr_init(posix_spawnattr_t *);
	   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);
	   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]);

       Inclusion of the <spawn.h> header may make visible symbols defined in
       the <sched.h> and <signal.h> headers.

       The following sections are informative.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       <sched.h>, <semaphore.h>, <signal.h>, <sys_types.h>

       The System Interfaces volume of POSIX.1‐2017, posix_spawn(),
       posix_spawn_file_actions_addclose(),
       posix_spawn_file_actions_adddup2(), posix_spawn_file_actions_destroy(),
       posix_spawnattr_destroy(), posix_spawnattr_getflags(),
       posix_spawnattr_getpgroup(), posix_spawnattr_getschedparam(),
       posix_spawnattr_getschedpolicy(), posix_spawnattr_getsigdefault(),
       posix_spawnattr_getsigmask()

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  In the event of any discrepancy between this version and the
       original IEEE and The Open Group Standard, the original IEEE and The
       Open Group Standard is the referee document. The original Standard can
       be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2017			   spawn.h(0P)