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.\"     @(#)posix_spawnattr_setpgroup.3
.
.Dd August 22, 2007
.Dt POSIX_SPAWNATTR_SETPGROUP 3
.Os "Mac OS X"
.Sh NAME
.Nm posix_spawnattr_setpgroup
.Nm posix_spawnattr_getpgroup
.Nd set or get the
.Em spawn-pgroup
attribute on a
.Em posix_spawnattr_t
.Sh SYNOPSIS
.Fd #include <spawn.h>
.Ft int
.Fo posix_spawnattr_setpgroup
.Fa "posix_spawnattr_t *attr"
.Fa "pid_t pgroup"
.Fc
.Ft int
.Fo posix_spawnattr_getpgroup
.Fa "const posix_spawnattr_t *restrict attr"
.Fa "pid_t *restrict pgroup"
.Fc
.Sh DESCRIPTION
The
.Fn posix_spawnattr_setpgroup
function sets the
.Fa pgroup
on the attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_getpgroup
function retrieves the
.Fa pgroup
on the attributes object referenced by
.Fa attr .
.Pp
The argument
.Fa pgroup
is the process group to be joined or created when the new process is
created if the
.Em POSIX_SPAWN_SETPGROUP
flag is set in the
.Em posix_spawnattr_t
via a call to
.Xr posix_spawnattr_setflags 3 ;
its default value is 0, which means a new process group will be created.
.Sh RETURN VALUES
On success, these functions return 0; on failure they return an error
number from
.In errno.h .
Additionally, if successful,
.Fn posix_spawnattr_getpgroup
will modify the contents of the
.Fa pgroup
parameter with the current attribute value.
.Sh ERRORS
These functions may fail if:
.Bl -tag -width Er
.\" ==========
.It Bq Er EINVAL
The value specified by
.Fa attr
is invalid.
.\" ==========
.It Bq Er EINVAL
The value of
.Fa attr
is invalid.
.El
.Sh SEE ALSO
.Xr posix_spawn 2 ,
.Xr posix_spawnp 2 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_setflags 3
.Sh STANDARDS
.St -susv3 [SPN]
.Sh HISTORY
The
.Fn posix_spawnattr_setpgroup
and
.Fn posix_spawnattr_getpgroup
function calls appeared in
.St -susv3 [SPN] .