atfork(3C)

NAME
     atfork_child, atfork_child_prepend, atfork_parent, atfork_pre - add fork
     pre and post interception routines

SYNOPSIS
     #include <unistd.h>

     int atfork_child (void (*func)(void));

     int atfork_child_prepend (void (*func)(void));

     int atfork_parent (void (*func)(int errno,int pid));

     int atfork_pre (void (*func)(void));

DESCRIPTION
     atfork_child adds the function func to the end of a list of functions to
     be called without arguments on entry of a child process created by
     fork(2).  atfork_child_prepend performs the same task, but it adds the
     function at the beginning of the list.  At most 32 functions may be
     registered by atfork_child or atfork_child_prepend.  The functions will
     be called in list order.

     atfork_parent adds the function func to a list of functions to be called
     with two integer arguments after calling fork(2).  At most 32 functions
     may be registered by atfork_parent; the functions will be called in the
     same order as their registration.

     atfork_pre adds the function func to a list of functions to be called
     without arguments just preceeding a call to fork(2).  At most 32
     functions may be registered by atfork_pre; the functions will be called
     in the reverse order as their registration.

     atfork_child, atfork_child_prepend, atfork_parent, and atfork_pre all
     return 0 if the registration succeeds. Otherwise, a value of -1 is
     returned and errno is set to indicate the error.


SEE ALSO
     fork(2).