Hi, I'm trying to transcribe a make script into perl. The script is very simple...

1) run a job
2) if the job completes properly, it will do a "touch file.name"
3) if the "file.name" exists, execute the next job

I think NFS is killing me, though--the file may get created, but the perl program is executed so quickly that it doesn't see the "file.name" in time and exits.

Here is what's not working:-

for ($c = 1; $c < 17; $c++) {
        if (fork() == 0) {
                exec ("CAD program with $c options...details not impor
+tant");
                exit;
        }
        wait;
        system ("sleep 20");    #so NFS gets updated...?
        if (-e "cmdos/$n[$c].done") {
                $complete = 1;  #in other words: do nothing
        } else {
                die ("Dependency file $n[$c].done did not get created-
+-exiting!\n");
        }
}

[download]
The dependency file *did* get created, but it took a few miliseconds to show up. How can I prevent abnormal termination? I don't think "sleep" is working the way I expect.

Thank You,
-Fiddler42

In reply to Running multiple jobs with dependencies by Anonymous Monk

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