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-.\"
-.\" 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.
-.\"
-.Dd February 6, 2011
-.Dt RFORK_THREAD 3
-.Os
-.Sh NAME
-.Nm rfork_thread
-.Nd create a rfork-based process thread
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In unistd.h
-.Ft pid_t
-.Fn rfork_thread "int flags" "void *stack" "int (*func)(void *arg)" "void *arg"
-.Sh DESCRIPTION
-.Bf -symbolic
-The
-.Fn rfork_thread
-function has been deprecated in favor of
-.Xr pthread_create 3 .
-.Ef
-.Pp
-The
-.Fn rfork_thread
-function
-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
-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
-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 ,
-.Xr pthread_create 3
-.Sh HISTORY
-The
-.Fn rfork_thread
-function first appeared in
-.Fx 4.3 .