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/*
* rocks/fork.c
*
* Fork handler
*
* Copyright (C) 2001 Victor Zandy
* See COPYING for distribution terms.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include "rs.h"
#include "log.h"
static int
post_fork_child()
{
rs_pid = getpid();
if (!rs_opt_hb)
return 0; /* nothing to do if there is no hb */
if (0 > rs_init_heartbeat()) {
rs_log("fork child cannot initialize heartbeat");
return -1;
}
return 0;
}
static int
post_fork_parent(pid_t child)
{
rs_log("fork -> [%d]", child);
return 0;
}
/* FIXME: What should happen to suspended rocks across fork? */
pid_t
rs_fork()
{
pid_t rv = -1;
sigset_t set;
int i;
/* avoid races with shm garbage collector in hb alarm handler */
rs_stop_heartbeat(&set);
for (i = 0; i < RS_MAXFD; i++) {
rs_t rs;
rs = rs_lookup(i);
if (!rs)
continue;
/* share shareworthy rocks that are not already shared */
if (rs->state != RS_NOTCONNECTED && rs->state != RS_EDP) {
if (!rs_rock_is_shared(rs)) {
if (0 > rs_shm_create(rs)) {
rs_log("fork cannot share rock");
goto out;
}
}
rs_shm_lock(rs->shm);
rs->shm->refcnt++;
rs_shm_unlock(rs->shm);
}
}
rv = fork();
if (!rv)
post_fork_child();
else
post_fork_parent(rv);
out:
rs_resume_heartbeat(&set);
return rv;
}
pid_t
rs_vfork()
{
return rs_fork();
}
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