@node vfork, unix
@subheading Syntax

@example
#include <unistd.h>

pid_t vfork(void);
@end example

@subheading Description

This function always returns -1 and sets `errno' to ENOMEM, as MS-DOS
does not support multiple processes.  It exists only to assist in
porting Unix programs.


@subheading Portability

@portability !ansi, !posix