rfork_thread(3)

NAME

rfork_thread - create a rfork-based process thread

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <unistd.h>
pid_t
rfork_thread(int flags, void *stack, int (*func)(void *arg),
void *arg);

DESCRIPTION

The rfork_thread() function is a helper function for

rfork(2). It
arranges for a new process to be created and the child pro

cess will call
the specified function with the specified argument, while

running on the
supplied stack.

Using this function should avoid the need to implement com

plex stack swap
code.

RETURN VALUES

Upon successful completion, rfork_thread() returns the pro

cess 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 errno is set to indicate the error.

The child process context is not aware of a return from the
rfork_thread() function as it begins executing directly with

the supplied
function.

ERRORS

See rfork(2) for error return codes.

SEE ALSO

fork(2), intro(2), minherit(2), rfork(2), vfork(2)

HISTORY

The rfork_thread() function first appeared in FreeBSD 4.3.

BSD July 29, 2000

BSD