PTHREAD_ATFORK(3)      FreeBSD Library Functions Manual      PTHREAD_ATFORK(3)

NAME

     pthread_atfork - register fork handlers

LIBRARY

     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS

     #include <pthread.h>

     int
     pthread_atfork(void (*prepare)(void), void (*parent)(void),
         void (*child)(void));

DESCRIPTION

     The pthread_atfork() function declares fork handlers to be called before
     and after fork(2), in the context of the thread that called fork(2).

     The handlers registered with pthread_atfork() are called at the moments
     in time described below:

     prepare  Before fork(2) processing commences in the parent process.  If
              more than one prepare handler is registered they will be called
              in the opposite order they were registered.

     parent   After fork(2) completes in the parent process.  If more than one
              parent handler is registered they will be called in the same
              order they were registered.

     child    After fork(2) processing completes in the child process.  If
              more than one child handler is registered they will be called in
              the same order they were registered.

     If no handling is desired at one or more of these three points, a null
     pointer may be passed as the corresponding fork handler.

RETURN VALUES

     If successful, the pthread_atfork() function will return zero.  Otherwise
     an error number will be returned to indicate the error.

ERRORS

     The pthread_atfork() function will fail if:

     [ENOMEM]           Insufficient table space exists to record the fork
                        handler addresses.

SEE ALSO

     fork(2), pthread(3)

STANDARDS

     The pthread_atfork() function is expected to conform to IEEE Std 1003.1
     ("POSIX.1").

AUTHORS

     This manpage was written by Alex Vasylenko <lxv@omut.org>.

FreeBSD 15.1-STABLE-HBSD         June 21, 2004               PTHREAD_ATFORK(3)