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Add manual pages for posix_spawn() functions.

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PR:	standards/122051
This commit is contained in:
David Xu 2008-07-28 02:22:19 +00:00
parent 947265b6bd
commit 62187b4142
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=180867
11 changed files with 1483 additions and 1 deletions
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19
lib/libc/gen/Makefile.inc
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@ -56,7 +56,13 @@ MAN+= alarm.3 arc4random.3 \
getttyent.3 getusershell.3 getvfsbyname.3 \
glob.3 initgroups.3 isgreater.3 ldexp.3 lockf.3 makecontext.3 \
modf.3 msgctl.3 msgget.3 msgrcv.3 msgsnd.3 \
nice.3 nlist.3 pause.3 popen.3 pselect.3 psignal.3 pwcache.3 \
nice.3 nlist.3 pause.3 popen.3 \
posix_spawn.3 posix_spawn_file_actions_addopen.3 \
posix_spawn_file_actions_init.3 posix_spawnattr_getflags.3 \
posix_spawnattr_getpgroup.3 posix_spawnattr_getschedparam.3 \
posix_spawnattr_getschedpolicy.3 posix_spawnattr_init.3 \
posix_spawnattr_getsigdefault.3 posix_spawnattr_getsigmask.3 \
pselect.3 psignal.3 pwcache.3 \
raise.3 rand48.3 readpassphrase.3 rfork_thread.3 \
scandir.3 sem_destroy.3 sem_getvalue.3 sem_init.3 \
sem_open.3 sem_post.3 sem_timedwait.3 sem_wait.3 \
@ -124,6 +130,17 @@ MLINKS+=ldexp.3 ldexpf.3 ldexp.3 ldexpl.3
MLINKS+=makecontext.3 swapcontext.3
MLINKS+=modf.3 modff.3 modf.3 modfl.3
MLINKS+=popen.3 pclose.3
MLINKS+=posix_spawn.3 posix_spawnp.3 \
posix_spawn_file_actions_addopen.3 posix_spawn_file_actions_addclose.3 \
posix_spawn_file_actions_addopen.3 posix_spawn_file_actions_adddup2.3 \
posix_spawn_file_actions_init.3 posix_spawn_file_actions_destroy.3 \
posix_spawnattr_getflags.3 posix_spawnattr_setflags.3 \
posix_spawnattr_getpgroup.3 posix_spawnattr_setpgroup.3 \
posix_spawnattr_getschedparam.3 posix_spawnattr_setschedparam.3 \
posix_spawnattr_getschedpolicy.3 posix_spawnattr_setschedpolicy.3 \
posix_spawnattr_getsigdefault.3 posix_spawnattr_setsigdefault.3 \
posix_spawnattr_getsigmask.3 posix_spawnattr_setsigmask.3 \
posix_spawnattr_init.3 posix_spawnattr_destroy.3
MLINKS+=psignal.3 strsignal.3 psignal.3 sys_siglist.3 psignal.3 sys_signame.3
MLINKS+=pwcache.3 group_from_gid.3 pwcache.3 user_from_uid.3
MLINKS+=rand48.3 _rand48.3 rand48.3 drand48.3 rand48.3 erand48.3 \

455
lib/libc/gen/posix_spawn.3 Normal file
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@ -0,0 +1,455 @@
.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWN 3
.Os
.Sh NAME
.Nm posix_spawn ,
.Nm posix_spawnp
.Nd "spawn a process"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawn "pid_t *restrict pid" "const char *restrict path" "const posix_spawn_file_actions_t *file_actions" "const posix_spawnattr_t *restrict attrp" "char *const argv[restrict]" "char *const envp[restrict]"
.Ft int
.Fn posix_spawnp "pid_t *restrict pid" "const char *restrict file" "const posix_spawn_file_actions_t *file_actions" "const posix_spawnattr_t *restrict attrp" "char *const argv[restrict]" "char *const envp[restrict]"
.Sh DESCRIPTION
The
.Fn posix_spawn
and
.Fn posix_spawnp
functions create a new process (child process) from the specified
process image.
The new process image is constructed from a regular executable
file called the new process image file.
.Pp
When a C program is executed as the result of this call, it is
entered as a C-language function call as follows:
.Bd -literal -offset indent
int main(int argc, char *argv[]);
.Ed
.Pp
where
.Fa argc
is the argument count and
.Fa argv
is an array of character pointers to the arguments themselves.
In addition, the variable:
.Bd -literal -offset indent
extern char **environ;
.Ed
.Pp
points to an array of character pointers to
the environment strings.
.Pp
The argument
.Fa argv
is an array of character pointers to null-terminated
strings.
The last member of this array is a null pointer and is not counted
in
.Fa argc .
These strings constitute the argument list available to the new process
image.
The value in
.Fa argv Ns [0]
should point to
a filename that is associated with the process image being started by
the
.Fn posix_spawn
or
.Fn posix_spawnp
function.
.Pp
The argument
.Fa envp
is an array of character pointers to null-terminated strings.
These strings constitute the environment for the new process image.
The environment array is terminated by a null pointer.
.Pp
The
.Fa path
argument to
.Fn posix_spawn
is a pathname that identifies the new process image file to execute.
.Pp
The
.Fa file
parameter to
.Fn posix_spawnp
is used to construct a pathname that identifies the new process
image file.
If the file parameter contains a slash character, the file parameter
is used as the pathname for the new process image file.
Otherwise, the path prefix for this file is obtained by a search
of the directories passed as the environment variable
.Dq Ev PATH .
If this variable is not specified,
the default path is set according to the
.Dv _PATH_DEFPATH
definition in
.In paths.h ,
which is set to
.Dq Ev /usr/bin:/bin .
.Pp
If
.Fa file_actions
is a null pointer, then file descriptors open in the
calling process remain open in the child process, except for those
whose close-on-exec flag
.Dv FD_CLOEXEC
is set (see
.Fn fcntl ) .
For those
file descriptors that remain open, all attributes of the corresponding
open file descriptions, including file locks (see
.Fn fcntl ) ,
remain unchanged.
.Pp
If
.Fa file_actions
is not NULL, then the file descriptors open in the child process are
those open in the calling process as modified by the spawn file
actions object pointed to by
.Fa file_actions
and the
.Dv FD_CLOEXEC
flag of each remaining open file descriptor after the spawn file actions
have been processed.
The effective order of processing the spawn file actions are:
.Bl -enum
.It
The set of open file descriptors for the child process initially
are the same set as is open for the calling process.
All attributes of the corresponding open file descriptions, including
file locks (see
.Fn fcntl ) ,
remain unchanged.
.It
The signal mask, signal default actions, and the effective user and
group IDs for the child process are changed as specified in the
attributes object referenced by
.Fa attrp .
.It
The file actions specified by the spawn file actions object are
performed in the order in which they were added to the spawn file
actions object.
.It
Any file descriptor that has its
.Dv FD_CLOEXEC
flag set (see
.Fn fcntl )
is closed.
.El
.Pp
The
.Vt posix_spawnattr_t
spawn attributes object type is defined in
.In spawn.h .
It contains the attributes defined below.
.Pp
If the
.Dv POSIX_SPAWN_SETPGROUP
flag is set in the spawn-flags attribute of the object referenced by
.Fa attrp ,
and the spawn-pgroup attribute of the same object is non-zero, then the
child's process group is as specified in the spawn-pgroup
attribute of the object referenced by
.Fa attrp .
.Pp
As a special case, if the
.Dv POSIX_SPAWN_SETPGROUP
flag is set in the spawn-flags attribute of the object referenced by
.Fa attrp ,
and the spawn-pgroup attribute of the same object is set to zero, then
the child is in a new process group with a process group ID equal
to its process ID.
.Pp
If the
.Dv POSIX_SPAWN_SETPGROUP
flag is not set in the spawn-flags attribute of the object referenced by
.Fa attrp ,
the new child process inherits the parent's process group.
.Pp
If the
.Dv POSIX_SPAWN_SETSCHEDPARAM
flag is set in the spawn-flags attribute of the object referenced by
.Fa attrp ,
but
.Dv POSIX_SPAWN_SETSCHEDULER
is not set, the new process image initially has the scheduling
policy of the calling process with the scheduling parameters specified
in the spawn-schedparam attribute of the object referenced by
.Fa attrp .
.Pp
If the
.Dv POSIX_SPAWN_SETSCHEDULER
flag is set in the spawn-flags attribute of the object referenced by
.Fa attrp
(regardless of the setting of the
.Dv POSIX_SPAWN_SETSCHEDPARAM
flag), the new process image initially has the scheduling policy
specified in the spawn-schedpolicy attribute of the object referenced by
.Fa attrp
and the scheduling parameters specified in the spawn-schedparam
attribute of the same object.
.Pp
The
.Dv POSIX_SPAWN_RESETIDS
flag in the spawn-flags attribute of the object referenced by
.Fa attrp
governs the effective user ID of the child process.
If this flag is not set, the child process inherits the parent
process' effective user ID.
If this flag is set, the child process' effective user ID is reset
to the parent's real user ID.
In either case, if the set-user-ID mode bit of the new process image
file is set, the effective user ID of the child process becomes
that file's owner ID before the new process image begins execution.
.Pp
The
.Dv POSIX_SPAWN_RESETIDS
flag in the spawn-flags attribute of the object referenced by
.Fa attrp
also governs the effective group ID of the child process.
If this flag is not set, the child process inherits the parent
process' effective group ID.
If this flag is set, the child process' effective group ID is
reset to the parent's real group ID.
In either case, if the set-group-ID mode bit of the new process image
file is set, the effective group ID of the child process becomes
that file's group ID before the new process image begins execution.
.Pp
If the
.Dv POSIX_SPAWN_SETSIGMASK
flag is set in the spawn-flags attribute of the object referenced by
.Fa attrp ,
the child process initially has the signal mask specified in the
spawn-sigmask attribute of the object referenced by
.Fa attrp .
.Pp
If the
.Dv POSIX_SPAWN_SETSIGDEF
flag is set in the spawn-flags attribute of the object referenced by
.Fa attrp ,
the signals specified in the spawn-sigdefault attribute of the same
object is set to their default actions in the child process.
Signals set to the default action in the parent process is set to
the default action in the child process.
.Pp
Signals set to be caught by the calling process is set to the
default action in the child process.
.Pp
Signals set to be ignored by the calling process image is set to
be ignored by the child process, unless otherwise specified by the
.Dv POSIX_SPAWN_SETSIGDEF
flag being set in the spawn-flags attribute of the object referenced by
.Fa attrp
and the signals being indicated in the spawn-sigdefault attribute
of the object referenced by
.Fa attrp .
.Pp
If the value of the
.Fa attrp
pointer is NULL, then the default values are used.
.Pp
All process attributes, other than those influenced by the attributes
set in the object referenced by
.Fa attrp
as specified above or by the file descriptor manipulations specified in
.Fa file_actions ,
appear in the new process image as though
.Fn vfork
had been called to create a child process and then
.Fn execve
had been called by the child process to execute the new process image.
.Pp
The implementation uses vfork(), thus the fork handlers are not run when
.Fn posix_spawn
or
.Fn posix_spawnp
is called.
.Sh RETURN VALUES
Upon successful completion,
.Fn posix_spawn
and
.Fn posix_spawnp
return the process ID of the child process to the parent process,
in the variable pointed to by a non-NULL
.Fa pid
argument, and return zero as the function return value.
Otherwise, no child process is created, no value is stored into
the variable pointed to by
.Fa pid ,
and an error number is returned as the function return value to
indicate the error.
If the
.Fa pid
argument is a null pointer, the process ID of the child is not returned
to the caller.
.Sh ERRORS
.Bl -enum
.It
If
.Fn posix_spawn
and
.Fn posix_spawnp
fail for any of the reasons that would cause
.Fn vfork
or one of the
.Nm exec
to fail, an error value is returned as described by
.Fn vfork
and
.Nm exec ,
respectively (or, if the error occurs after the calling process successfully
returns, the child process exits with exit status 127).
.It
If
.Nm POSIX_SPAWN_SETPGROUP
is set in the spawn-flags attribute of the object referenced by attrp, and
.Fn posix_spawn
or
.Fn posix_spawnp
fails while changing the child's process group, an error value is returned as
described by
.Fn setpgid
(or, if the error occurs after the calling process successfully returns,
the child process exits with exit status 127).
.It
If
.Nm POSIX_SPAWN_SETSCHEDPARAM
is set and
.Nm POSIX_SPAWN_SETSCHEDULER
is not set in the spawn-flags attribute of the object referenced by attrp, then
if
.Fn posix_spawn
or
.Fn posix_spawnp
fails for any of the reasons that would cause
.Fn sched_setparam
to fail, an error value is returned as described by
.Fn sched_setparam
(or, if the error occurs after the calling process successfully returns, the
child process exits with exit status 127).
.It
If
.Nm POSIX_SPAWN_SETSCHEDULER
is set in the spawn-flags attribute of the object referenced by attrp, and if
.Fn posix_spawn
or
.Fn posix_spawnp
fails for any of the reasons that would cause
.Fn sched_setscheduler
to fail, an error value is returned as described by
.Fn sched_setscheduler
(or, if the error occurs after the calling process successfully returns,
the child process exits with exit status 127).
.It
If the
.Fa file_actions
argument is not NULL, and specifies any close, dup2, or open actions to be
performed, and if
.Fn posix_spawn
or
.Fn posix_spawnp
fails for any of the reasons that would cause
.Fn close ,
.Fn dup2 ,
or
.Fn open
to fail, an error value is returned as described by
.Fn close ,
.Fn dup2 ,
and
.Fn open ,
respectively (or, if the error occurs after the calling process successfully
returns, the child process exits with exit status 127). An open file action
may, by itself, result in any of the errors described by
.Fn close
or
.Fn dup2 ,
in addition to those described by
.Fn open .
.El
.Sh SEE ALSO
.Xr close 2 ,
.Xr dup2 2 ,
.Xr execve 2 ,
.Xr fcntl 2 ,
.Xr open 2 ,
.Xr posix_spawn_file_actions_addclose 3 ,
.Xr posix_spawn_file_actions_adddup2 3 ,
.Xr posix_spawn_file_actions_addopen 3 ,
.Xr posix_spawn_file_actions_destroy 3 ,
.Xr posix_spawn_file_actions_init 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_getflags 3 ,
.Xr posix_spawnattr_getpgroup 3 ,
.Xr posix_spawnattr_getschedparam 3 ,
.Xr posix_spawnattr_getschedpolicy 3 ,
.Xr posix_spawnattr_getsigdefault 3 ,
.Xr posix_spawnattr_getsigmask 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_setflags 3 ,
.Xr posix_spawnattr_setpgroup 3 ,
.Xr posix_spawnattr_setschedparam 3 ,
.Xr posix_spawnattr_setschedpolicy 3 ,
.Xr posix_spawnattr_setsigdefault 3 ,
.Xr posix_spawnattr_setsigmask 3 ,
.Xr sched_setparam 2 ,
.Xr sched_setscheduler 2 ,
.Xr setpgid 2 ,
.Xr vfork 2
.Sh STANDARDS
The
.Fn posix_spawn
and
.Fn posix_spawnp
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawn
and
.Fn posix_spawnp
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq Ed Schouten ed@FreeBSD.org

182
lib/libc/gen/posix_spawn_file_actions_addopen.3 Normal file
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@ -0,0 +1,182 @@
.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWN_FILE_ACTIONS_ADDOPEN 3
.Os
.Sh NAME
.Nm posix_spawn_file_actions_addopen ,
.Nm posix_spawn_file_actions_adddup2 ,
.Nm posix_spawn_file_actions_addclose
.Nd "add open, dup2 or close action to spawn file actions object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawn_file_actions_addopen "posix_spawn_file_actions_t * file_actions" "int fildes" "const char *restrict path" "int oflag" "mode_t mode"
.Ft int
.Fn posix_spawn_file_actions_adddup2 "posix_spawn_file_actions_t * file_actions" "int fildes" "int newfildes"
.Ft int
.Fn posix_spawn_file_actions_addclose "posix_spawn_file_actions_t * file_actions" "int fildes"
.Sh DESCRIPTION
These functions add an open, dup2 or close action to a spawn
file actions object.
.Pp
A spawn file actions object is of type
.Vt posix_spawn_file_actions_t
(defined in
.In spawn.h )
and is used to specify a series of actions to be performed by a
.Fn posix_spawn
or
.Fn posix_spawnp
operation in order to arrive at the set of open file descriptors for the
child process given the set of open file descriptors of the parent.
.Pp
A spawn file actions object, when passed to
.Fn posix_spawn
or
.Fn posix_spawnp ,
specify how the set of open file descriptors in the calling
process is transformed into a set of potentially open file descriptors
for the spawned process.
This transformation is as if the specified sequence of actions was
performed exactly once, in the context of the spawned process (prior to
execution of the new process image), in the order in which the actions
were added to the object; additionally, when the new process image is
executed, any file descriptor (from this new set) which has its
.Dv FD_CLOEXEC
flag set is closed (see
.Fn posix_spawn ) .
.Pp
The
.Fn posix_spawn_file_actions_addopen
function adds an open action to the object referenced by
.Fa file_actions
that causes the file named by
.Fa path
to be opened (as if
.Bd -literal -offset indent
open(path, oflag, mode)
.Ed
.Pp
had been called, and the returned file descriptor, if not
.Fa fildes ,
had been changed to
.Fa fildes )
when a new process is spawned using this file actions object.
If
.Fa fildes
was already an open file descriptor, it is closed before the new
file is opened.
.Pp
The string described by
.Fa path
is copied by the
.Fn posix_spawn_file_actions_addopen
function.
.Pp
The
.Fn posix_spawn_file_actions_adddup2
function adds a dup2 action to the object referenced by
.Fa file_actions
that causes the file descriptor
.Fa fildes
to be duplicated as
.Fa newfildes
(as if
.Bd -literal -offset indent
dup2(fildes, newfildes)
.Ed
.Pp
had been called) when a new process is spawned using this file actions object.
.Pp
The
.Fn posix_spawn_file_actions_addclose
function adds a close action to the object referenced by
.Fa file_actions
that causes the file descriptor
.Fa fildes
to be closed (as if
.Bd -literal -offset indent
close(fildes)
.Ed
.Pp
had been called) when a new process is spawned using this file actions
object.
.Sh RETURN VALUES
Upon successful completion, these functions return zero;
otherwise, an error number is returned to indicate the error.
.Sh ERRORS
These
functions fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The value specified by
.Fa fildes
or
.Fa newfildes
is negative.
.It Bq Er ENOMEM
Insufficient memory exists to add to the spawn file actions object.
.El
.Sh SEE ALSO
.Xr close 2 ,
.Xr dup2 2 ,
.Xr open 2 ,
.Xr posix_spawn 3 ,
.Xr posix_spawn_file_actions_destroy 3 ,
.Xr posix_spawn_file_actions_init 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawn_file_actions_addopen ,
.Fn posix_spawn_file_actions_adddup2
and
.Fn posix_spawn_file_actions_addclose
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawn_file_actions_addopen ,
.Fn posix_spawn_file_actions_adddup2
and
.Fn posix_spawn_file_actions_addclose
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq Ed Schouten ed@FreeBSD.org

104
lib/libc/gen/posix_spawn_file_actions_init.3 Normal file
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@ -0,0 +1,104 @@
.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWN_FILE_ACTIONS_INIT 3
.Os
.Sh NAME
.Nm posix_spawn_file_actions_init ,
.Nm posix_spawn_file_actions_destroy
.Nd "initialize and destroy spawn file actions object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawn_file_actions_init "posix_spawn_file_actions_t * file_actions"
.Ft int
.Fn posix_spawn_file_actions_destroy "posix_spawn_file_actions_t * file_actions"
.Sh DESCRIPTION
The
.Fn posix_spawn_file_actions_init
function initialize the object referenced by
.Fn file_actions
to contain no file actions for
.Fn posix_spawn
or
.Fn posix_spawnp .
Initializing an already initialized spawn file actions object may cause
memory to be leaked.
.Pp
The
.Fn posix_spawn_file_actions_destroy
function destroy the object referenced by
.Fa file_actions ;
the object becomes, in effect, uninitialized.
A destroyed spawn file actions object can be reinitialized using
.Fn posix_spawn_file_actions_init .
The object should not be used after it has been destroyed.
.Sh RETURN VALUES
Upon successful completion, these functions return zero;
otherwise, an error number is returned to indicate the error.
.Sh ERRORS
The
.Fn posix_spawn_file_actions_init
function will fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
Insufficient memory exists to initialize the spawn file actions object.
.El
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawn_file_actions_addclose 3 ,
.Xr posix_spawn_file_actions_adddup2 3 ,
.Xr posix_spawn_file_actions_addopen 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawn_file_actions_init
and
.Fn posix_spawn_file_actions_destroy
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawn_file_actions_init
and
.Fn posix_spawn_file_actions_destroy
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_GETFLAGS 3
.Os
.Sh NAME
.Nm posix_spawnattr_getflags ,
.Nm posix_spawnattr_setflags
.Nd "get and set the spawn-flags attribute of a spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_getflags "const posix_spawnattr_t *restrict attr" "short *restrict flags"
.Ft int
.Fn posix_spawnattr_setflags "posix_spawnattr_t *attr" "short flags"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_getflags
function obtains the value of the spawn-flags attribute from the
attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_setflags
function sets the spawn-flags attribute in an initialized
attributes object referenced by
.Fa attr .
.Pp
The spawn-flags attribute is used to indicate which process attributes
are to be changed in the new process image when invoking
.Fn posix_spawn
or
.Fn posix_spawnp .
It is the bitwise-inclusive OR of zero or more of the following flags
(see
.Fn posix_spawn ) :
.Bl -tag -offset indent
.It Dv POSIX_SPAWN_RESETIDS
.It Dv POSIX_SPAWN_SETPGROUP
.It Dv POSIX_SPAWN_SETSIGDEF
.It Dv POSIX_SPAWN_SETSIGMASK
.It Dv POSIX_SPAWN_SETSCHEDPARAM
.It Dv POSIX_SPAWN_SETSCHEDULER
.El
.Pp
These flags are defined in
.In spawn.h .
The default value of this attribute is as if no flags were set.
.Sh RETURN VALUES
The
.Fn posix_spawnattr_getflags
and
.Fn posix_spawnattr_setflags
functions return zero.
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_getflags
and
.Fn posix_spawnattr_setflags
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_getflags
and
.Fn posix_spawnattr_setflags
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_GETPGROUP 3
.Os
.Sh NAME
.Nm posix_spawnattr_getpgroup ,
.Nm posix_spawnattr_setpgroup
.Nd "get and set the spawn-pgroup attribute of a spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_getpgroup "const posix_spawnattr_t *restrict attr" "pid_t *restrict pgroup"
.Ft int
.Fn posix_spawnattr_setpgroup "posix_spawnattr_t *attr" "pid_t pgroup"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_getpgroup
function obtains the value of the spawn-pgroup attribute from the
attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_setpgroup
function sets the spawn-pgroup attribute in an initialized
attributes object referenced by
.Fa attr .
.Pp
The spawn-pgroup attribute represents the process group to be joined by
the new process image in a spawn operation (if
.Dv POSIX_SPAWN_SETPGROUP
is set in the spawn-flags attribute).
The default value of this attribute is zero.
.Sh RETURN VALUES
The
.Fn posix_spawnattr_getpgroup
and
.Fn posix_spawnattr_setpgroup
functions return zero.
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_getpgroup
and
.Fn posix_spawnattr_setpgroup
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_getpgroup
and
.Fn posix_spawnattr_setpgroup
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_GETSCHEDPARAM 3
.Os
.Sh NAME
.Nm posix_spawnattr_getschedparam ,
.Nm posix_spawnattr_setschedparam
.Nd "get and set the spawn-schedparam attribute of a spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_getschedparam "const posix_spawnattr_t *restrict attr" "struct sched_param *restrict schedparam"
.Ft int
.Fn posix_spawnattr_setschedparam "posix_spawnattr_t *attr" "const struct sched_param *restrict schedparam"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_getschedparam
function obtains the value of the spawn-schedparam attribute from the
attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_setschedparam
function sets the spawn-schedparam attribute in an initialized attributes
object referenced by
.Fa attr .
.Pp
The spawn-schedparam attribute represents the scheduling parameters to
be assigned to the new process image in a spawn operation (if
.Dv POSIX_SPAWN_SETSCHEDULER
or
.Dv POSIX_SPAWN_SETSCHEDPARAM
is set in the spawn-flags attribute).
The default value of this attribute is unspecified.
.Sh RETURN VALUES
The
.Fn posix_spawnattr_getschedparam
and
.Fn posix_spawnattr_setschedparam
functions return zero.
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_getschedpolicy 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_setschedpolicy 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_getschedparam
and
.Fn posix_spawnattr_setschedparam
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_getschedparam
and
.Fn posix_spawnattr_setschedparam
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_GETSCHEDPOLICY 3
.Os
.Sh NAME
.Nm posix_spawnattr_getschedpolicy ,
.Nm posix_spawnattr_setschedpolicy
.Nd "get and set the spawn-schedpolicy attribute of a spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_getschedpolicy "const posix_spawnattr_t *restrict attr" "int *restrict schedpolicy"
.Ft int
.Fn posix_spawnattr_setschedpolicy "posix_spawnattr_t *attr" "int schedpolicy"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_getschedpolicy
function obtains the value of the spawn-schedpolicy attribute from the
attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_setschedpolicy
function sets the spawn-schedpolicy attribute in an initialized attributes
object referenced by
.Fa attr .
.Pp
The spawn-schedpolicy attribute represents the scheduling policy to
be assigned to the new process image in a spawn operation (if
.Dv POSIX_SPAWN_SETSCHEDULER
is set in the spawn-flags attribute).
The default value of this attribute is unspecified.
.Sh RETURN VALUES
The
.Fn posix_spawnattr_getschedpolicy
and
.Fn posix_spawnattr_setschedpolicy
functions return zero.
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_getschedparam 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_setschedparam 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_getschedpolicy
and
.Fn posix_spawnattr_setschedpolicy
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_getschedpolicy
and
.Fn posix_spawnattr_setschedpolicy
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_GETSIGDEFAULT 3
.Os
.Sh NAME
.Nm posix_spawnattr_getsigdefault ,
.Nm posix_spawnattr_setsigdefault
.Nd "get and set the spawn-sigdefault attribute of a spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_getsigdefault "const posix_spawnattr_t *restrict attr" "sigset_t *restrict sigdefault"
.Ft int
.Fn posix_spawnattr_setsigdefault "posix_spawnattr_t *attr" "const sigset_t *restrict sigdefault"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_getsigdefault
function obtains the value of the spawn-sigdefault attribute from the
attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_setsigdefault
function sets the spawn-sigdefault attribute in an initialized attributes
object referenced by
.Fa attr .
.Pp
The spawn-sigdefault attribute represents the set of signals to be forced to
default signal handling in the new process image (if
.Dv POSIX_SPAWN_SETSIGDEF
is set in the spawn-flags attribute) by a spawn operation.
The default value of this attribute is an empty signal set.
.Sh RETURN VALUES
The
.Fn posix_spawnattr_getsigdefault
and
.Fn posix_spawnattr_setsigdefault
functions return zero.
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_getsigmask 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_setsigmask 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_getsigdefault
and
.Fn posix_spawnattr_setsigdefault
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_getsigdefault
and
.Fn posix_spawnattr_setsigdefault
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_GETSIGMASK 3
.Os
.Sh NAME
.Nm posix_spawnattr_getsigmask ,
.Nm posix_spawnattr_setsigmask
.Nd "get and set the spawn-sigmask attribute of a spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_getsigmask "const posix_spawnattr_t *restrict attr" "sigset_t *restrict sigmask"
.Ft int
.Fn posix_spawnattr_setsigmask "posix_spawnattr_t *attr" "const sigset_t *restrict sigmask"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_getsigmask
function obtains the value of the spawn-sigmask attribute from the
attributes object referenced by
.Fa attr .
.Pp
The
.Fn posix_spawnattr_setsigmask
function sets the spawn-sigmask attribute in an initialized attributes
object referenced by
.Fa attr .
.Pp
The spawn-sigmask attribute represents the signal mask in effect in the
new process image of a spawn operation (if
.Dv POSIX_SPAWN_SETSIGMASK
is set in the spawn-flags attribute).
The default value of this attribute is unspecified.
.Sh RETURN VALUES
The
.Fn posix_spawnattr_getsigmask
and
.Fn posix_spawnattr_setsigmask
functions return zero.
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnattr_destroy 3 ,
.Xr posix_spawnattr_getsigmask 3 ,
.Xr posix_spawnattr_init 3 ,
.Xr posix_spawnattr_setsigmask 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_getsigmask
and
.Fn posix_spawnattr_setsigmask
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_getsigmask
and
.Fn posix_spawnattr_setsigmask
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org

123
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.\" Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
.\" 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
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.\" SUCH DAMAGE.
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.\" Portions of this text are reprinted and reproduced in electronic form
.\" from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology --
.\" Portable Operating System Interface (POSIX), The Open Group Base
.\" Specifications Issue 6, Copyright (C) 2001-2004 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.
.\"
.\" $FreeBSD$
.\"
.Dd Mar 24, 2008
.Dt POSIX_SPAWNATTR_INIT 3
.Os
.Sh NAME
.Nm posix_spawnattr_init ,
.Nm posix_spawnattr_destroy
.Nd "initialize and destroy spawn attributes object"
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In spawn.h
.Ft int
.Fn posix_spawnattr_init "posix_spawnattr_t * attr"
.Ft int
.Fn posix_spawnattr_destroy "posix_spawnattr_t * attr"
.Sh DESCRIPTION
The
.Fn posix_spawnattr_init
function initializes a spawn attributes object
.Fa attr
with the default value for all of the individual attributes used by the
implementation.
Initializing an already initialized spawn attributes object may cause
memory to be leaked.
.Pp
The
.Fn posix_spawnattr_destroy
function destroys a spawn attributes object.
A destroyed
.Fa attr
attributes object can be reinitialized using
.Fn posix_spawnattr_init .
The object should not be used after it has been destroyed.
.Pp
A spawn attributes object is of type
.Vt posix_spawnattr_t
(defined in
.In spawn.h )
and is used to specify the inheritance of process attributes across a
spawn operation.
.Pp
The resulting spawn attributes object (possibly modified by setting
individual attribute values), is used to modify the behavior of
.Fn posix_spawn
or
.Fn posix_spawnp .
After a spawn attributes object has been used to spawn a process by a
call to a
.Fn posix_spawn
or
.Fn posix_spawnp ,
any function affecting the attributes object (including destruction)
will not affect any process that has been spawned in this way.
.Sh RETURN VALUES
Upon successful completion,
.Fn posix_spawnattr_init
and
.Fn posix_spawnattr_destroy
return zero;
otherwise, an error number is returned to indicate the error.
.Sh ERRORS
The
.Fn posix_spawnattr_init
function will fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
Insufficient memory exists to initialize the spawn file actions object.
.El
.Sh SEE ALSO
.Xr posix_spawn 3 ,
.Xr posix_spawnp 3
.Sh STANDARDS
The
.Fn posix_spawnattr_init
and
.Fn posix_spawnattr_destroy
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn posix_spawnattr_init
and
.Fn posix_spawnattr_destroy
functions first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An Ed Schouten Aq ed@FreeBSD.org