Function TerminateModuleForkChild

src/module.cpp:8094–8111

Kill the active module forked child, if there is one active and the * pid matches, and returns C_OK. Otherwise if there is no active module * child or the pid does not match, return C_ERR without doing anything. */

 * pid matches, and returns C_OK. Otherwise if there is no active module
 * child or the pid does not match, return C_ERR without doing anything. */
int TerminateModuleForkChild(int child_pid, int wait) {
    /* Module child should be active and pid should match. */
    if (g_pserver->child_type != CHILD_TYPE_MODULE ||
        g_pserver->child_pid != child_pid) return C_ERR;

    int statloc;
    serverLog(LL_VERBOSE,"Killing running module fork child: %ld",
        (long) g_pserver->child_pid);
    if (kill(g_pserver->child_pid,SIGUSR1) != -1 && wait) {
        while(waitpid(g_pserver->child_pid,&statloc,0) !=
              g_pserver->child_pid);
    }
    /* Reset the buffer accumulating changes while the child saves. */
    resetChildState();
    moduleForkInfo.done_handler = NULL;
    moduleForkInfo.done_handler_user_data = NULL;
    return C_OK;
}

/* Can be used to kill the forked child process from the parent process.
 * child_pid would be the return value of RedisModule_Fork. */