PTHREAD_ATFORK(3)

NAME
pthread_atfork - register handlers to be called before and after fork()

SYNOPSIS
#include <pthread.h>
int
pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void));

DESCRIPTION
The pthread_atfork() function is used to register functions to be called before and after fork() The prepare handler is called before fork() , while the parent and child handlers are called after fork() in the parent and child process, respectively. prepare handlers are called in reverse order of their registration, while parent and child handlers are called in the order in which they were registered. Any of the handlers may be NULL.

Remember: only async-cancel-safe functions are allowed on the child side of fork()

RETURN VALUES
If successful, the pthread_atfork() function will return zero; otherwise an error number will be returned to indicate the error.

ERRORS
pthread_atfork() will fail if:

[ENOMEM]
    The system lacked the necessary resources to add another handler to the list.

SEE ALSO
fork(2)

STANDARDS
pthread_atfork() conforms to p1003.1-96.