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 .