implement _Fork and refactor fork using it

the _Fork interface is defined for future issue of POSIX as the
outcome of Austin Group issue 62, which drops the AS-safety
requirement for fork, and provides an AS-safe replacement that does
not run the registered atfork handlers.

1 files changed, 1 insertions, 0 deletions

diff --git a/include/unistd.h b/include/unistd.h
index 07584a23..13064026 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -82,6 +82,7 @@ unsigned sleep(unsigned);
 int pause(void);
 
 pid_t fork(void);
+pid_t _Fork(void);
 int execve(const char *, char *const [], char *const []);
 int execv(const char *, char *const []);
 int execle(const char *, const char *, ...);