pthread_atfork(3)          Library Functions Manual          pthread_atfork(3)

<?><?><?>
       pthread_atfork - <?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>

<?><?><?><?><?><?><?><?><?><?>
       POSIX threads library (libpthread, -lpthread)

<?><?><?><?><?><?><?><?><?>
       #include <pthread.h>

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

<?><?><?><?><?><?><?><?>
       The pthread_atfork()  function registers fork handlers that are to be
       executed when fork(2)  is called by any thread in a process.  The
       handlers are executed in the context of the thread that calls fork(2).

       <?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?>
       <?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?>:

       o  prepare specifies a handler that is executed in the parent process
          before fork(2)  processing starts.

       o  <?><?><?><?><?> parent <?><?><?><?><?><?><?><?>
          <?><?><?><?><?><?><?><?><?><?>, <?><?><?><?><?><?><?>
          <?><?><?><?><?><?><?><?><?><?><?> <?>
          <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
          <?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
          fork(2).

       o  <?><?><?><?><?> child <?><?><?><?><?><?><?><?>
          <?><?><?><?><?><?><?><?><?><?>, <?><?><?><?><?><?><?>
          <?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?><?><?>
          <?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
          fork(2).

       <?><?><?><?><?> <?><?> <?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?> <?><?><?><?> <?><?><?><?><?> NULL, <?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?>
       <?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?>
       <?><?><?><?><?><?> fork(2).

<?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       On success, pthread_atfork()  returns zero.  On error, it returns an
       error number.  pthread_atfork()  may be called multiple times by a
       process to register additional handlers.  The handlers for each phase
       are called in a specified order: the prepare handlers are called in
       reverse order of registration; the parent and child handlers are called
       in the order of registration.

<?><?><?><?><?><?>
       ENOMEM Could not allocate memory to record the fork handler list entry.

<?><?><?><?><?><?><?><?><?>
       POSIX.1-2008.

<?><?><?><?><?><?><?>
       POSIX.1-2001.

<?><?><?><?><?><?><?><?><?><?>
       When fork(2)  is called in a multithreaded process, only the calling
       thread is duplicated in the child process.  The original intention of
       pthread_atfork()  was to allow the child process to be returned to a
       consistent state.  For example, at the time of the call to fork(2),
       other threads may have locked mutexes that are visible in the
       user-space memory duplicated in the child.  Such mutexes would never be
       unlocked, since the threads that placed the locks are not duplicated in
       the child.  The intent of pthread_atfork()  was to provide a mechanism
       whereby the application (or a library)  could ensure that mutexes and
       other process and thread state would be restored to a consistent state.
       In practice, this task is generally too difficult to be practicable.

       <?> <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       fork(2) <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
       <?> <?><?><?><?><?><?><?>; <?><?><?><?><?><?><?> <?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?> <?><?><?><?><?><?><?>
       async-signal-safe (<?><?><?><?><?><?><?><?> signal-safety(7)) <?><?>
       <?><?><?><?><?><?><?>, <?><?><?><?> <?><?> <?><?><?><?><?><?><?>
       execve(2) <?><?><?> <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?>.

       <?> POSIX.1 <?><?><?><?><?><?><?>, <?><?><?> pthread_atfork() <?><?>
       <?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> EINTR.

<?><?><?><?><?><?><?><?> <?><?><?><?><?>
       fork(2), atexit(3), pthreads(7)

<?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?> <?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?>(<?>) Alexey, Azamat Hackimov
       <azamat.hackimov@gmail.com>, kogamatranslator49 <r.podarov@yandex.ru>,
       Darima Kogan <silverdk99@gmail.com>, Max Is <ismax799@gmail.com>, Yuri
       Kozlov <yuray@komyakino.ru> <?> <?><?><?><?> <?><?><?><?><?><?>
       <pavia00@gmail.com>

       <?><?><?><?> <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?>; <?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> GNU (GNU General Public License - GPL,
       <https://www.gnu.org/licenses/gpl-3.0.html> <?><?><?><?><?><?> 3
       <?><?><?> <?><?><?><?><?> <?><?><?><?><?><?><?>) <?>
       <?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?>, <?><?> <?><?><?> <?><?><?><?><?>-<?><?><?><?>
       <?><?><?><?><?><?><?><?>.

       <?><?><?><?> <?><?> <?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?>-<?><?><?><?> <?><?><?><?><?><?> <?>
       <?><?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?>, <?><?><?><?><?><?><?><?><?><?>,
       <?><?><?><?><?><?><?><?> <?><?> <?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?>(<?><?>) <?><?> <?><?><?>(<?><?>)
       <?><?><?><?><?><?>(<?><?>) <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?> <?><?><?> <?><?> <?><?><?><?><?><?> <?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?>
       <<debian-l10n-russian@lists.debian.org>>.

<?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> Linux 6.9.1
                             2 <?><?><?> 2024 <?>.           pthread_atfork(3)