Re: Kannel quits without reporting fatal error

Hello,

run_kannel_box is a strange beast (at least to me). It's purpose seems
unclear (or more appropriately 'undocumented'). I understand it's part
of the utils directory (out of main source) but it is part of standard
build (eg: debian packages). 

Andres could you explain a bit about what it's function is .. the man
page is brief. I have yet to review source code in detail - but if it's
supposed to restarting failed services I would be interested in doing
some work/testing with it (potentially adding syslog support to begin
with).  

On brief code view I did notice from run_kannel_box source (before
for(;;) in main_loop)

        /* We can't report any errors here, because we are running
         * as a daemon and we have no logfile of our own.  So we
         * exit with errno as the exit code, to offer a minimal clue. */

        for (;;) {

                /* Make sure we don't fork in an endless loop if
something
                 * is drastically wrong.  This code limits it to one
                 * per minute (or whatever min_restart_delay is set to).
*/
                time_t this_time = time(NULL);
                if (this_time <= next_fork) {
                        sleep(next_fork - this_time);
                }
                next_fork = this_time + min_restart_delay;

                child_box = fork();
                if (child_box < 0) {
                        return errno;
                }
                if (child_box == 0) {
                        /* child.  exec the box */
                        execvp(boxfile, box_arglist);
                        exit(127);
                }

                while (waitpid(child_box, (int *)NULL, 0) != child_box)
{
                        if (errno == ECHILD) {
                                /* Something went wrong... we don't know
what,
                                 * but we do know that our child does
not
                                 * exist.  So restart it. */
                                break;
                        }
                        if (errno == EINTR) {
                                continue;
                        }
                        /* Something weird happened. */
                        return errno;
                }
        }

This seems to suggest potential for 'vanishing' boxes ('soemthing weird
happened' - Stipe does this tie in with your previous comments?). When I
did a process check - there was also no run_kannel_box running. 

Cheers,
Alan

On Wed, 2003-07-09 at 01:21, Andreas Fink wrote:

> ehmm.. why you use a bash script for that? Kannel has a nice built in
> feature called
> 
> 
> 	run_kannel_box
> 
> 
> which does exactly that.