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Add a skeleton rfork_thread(3) man page.

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This commit is contained in:
Peter Wemm 2000-07-29 12:12:39 +00:00
parent 253fafca68
commit db3c6b6b22
2 changed files with 79 additions and 1 deletions
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3
lib/libc/gen/Makefile.inc
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@ -46,7 +46,8 @@ MAN3+= alarm.3 arc4random.3 clock.3 \
glob.3 initgroups.3 isinf.3 \
ldexp.3 lockf.3 modf.3 msgctl.3 msgget.3 msgrcv.3 msgsnd.3 \
nice.3 nlist.3 pause.3 popen.3 psignal.3 pwcache.3 \
raise.3 rand48.3 scandir.3 setjmp.3 setmode.3 shm_open.3 \
raise.3 rand48.3 rfork_thread.3 \
scandir.3 setjmp.3 setmode.3 shm_open.3 \
siginterrupt.3 signal.3 sigsetops.3 sleep.3 stringlist.3 \
strtofflags.3 sysconf.3 sysctl.3 syslog.3 tcgetpgrp.3 \
tcsendbreak.3 tcsetattr.3 tcsetpgrp.3 time.3 times.3 timezone.3 \

77
lib/libc/gen/rfork_thread.3 Normal file
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@ -0,0 +1,77 @@
.\"
.\" Copyright (c) 2000 Peter Wemm <peter@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.
.\"
.\" $FreeBSD$
.\"
.Dd Jul 29, 2000
.Dt RFORK_THREAD 3
.Os
.Sh NAME
.Nm rfork_thread
.Nd create a rfork-based process thread
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.Fd #include <unistd.h>
.Ft int
.Fn rfork_thread "int flags" "void *stack" "int (*func)(void *arg)" "void *arg"
.Sh DESCRIPTION
.Fn rfork_thread 3
is a helper function for
.Xr rfork 2 .
It arranges for a new process to be created and the child process will
call the specified function with the specified argument, while running on
the supplied stack.
.Pp
Using this function should avoid the need to implement complex stack
swap code.
.Sh RETURN VALUES
Upon successful completion,
.Fn rfork_thread 3
returns the process ID of the child process to the parent process.
Otherwise, a value of -1 is returned
to the parent process, no child process is created, and the global
variable
.Va errno
is set to indicate the error.
.Pp
The child process context is not aware of a return from the
.Fn rfork_thread 3
function as it begins executing directly with the supplied function.
.Sh ERRORS
See
.Xr rfork 2
for error return codes.
.Sh SEE ALSO
.Xr fork 2 ,
.Xr intro 2 ,
.Xr minherit 2 ,
.Xr rfork 2 ,
.Xr vfork 2
.Sh HISTORY
The
.Fn rfork_thread 3
function call first appeared in
.Fx 5.0