Why this process is not running in background?

Question

So basically i want to run script that will make around 15k pdf files, and it needs to be done from shell because of php max_timeout...

Server: Ubuntu 10.04.1 PHP : 5.3.2-1ubuntu4.5

So what i currently tried:

function run_in_background($Command){
    $ps = shell_exec("nohup php5 $Command > /dev/null 2> /dev/null & echo $!");
    return $ps;
}

$ok = run_in_background('/var/www/custom/web/public/make_pdf.php');

if(!empty($ok))
    var_dump($ok);
else
    exit('Fail');

And after that i go to ssh console and do ps $ps and in response i get headers only with no info - witch means process is not running...

How can i do this so it works?

try without `echo $!` or ending with `&`. If you want to run 2 proccess 'inline', use `&&` instead of a simple `&`. example: `nohup php5 $Command > /dev/null 2> /dev/null && echo $! &` — jotapdiez, May 06 '11 at 13:22
@arma how did you know if the process ended with an error? try placing output in a file. — jotapdiez, May 06 '11 at 13:31
@jotapdiez i don't know that all i know it did't return PID of the process. Ok how you output everything in file? — arma, May 06 '11 at 13:34
@arma just do `nohup php5 $Command > command_stout.txt 2> command_stderr.txt && echo $! &` and check both files — jotapdiez, May 06 '11 at 13:36
Well it gives me fatal error on require_once, thats because my path is build using global `$_SERVER['DOCUMENT_ROOT']`. — arma, May 06 '11 at 13:45
@jotapdiez - Ok i made another init file using absalute paths without global variables. And now process is running and i can see it in my shh console. :D Thanks, for assistance. If you care to post it as answer i'll accept it. — arma, May 06 '11 at 13:50

score 1 · Answer 1 · answered May 06 '11 at 13:19

1

Try to put a & after Command :

$ps = shell_exec("nohup php5 $Command & > /dev/null 2> /dev/null & echo $!");

answered May 06 '11 at 13:19

Heisenbug

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still no dice, i get the pid okey but process is empty. – arma May 06 '11 at 13:24

score 1 · Accepted Answer · answered May 06 '11 at 13:54

Try without echo $! or ending with &. If you want to run 2 proccess 'inline', use && instead of a simple &.

Example: nohup php5 $Command > /dev/null 2> /dev/null && echo $! &

To check if the proccess end with error do this:

nohup php5 $Command > command_stout.txt 2> command_stderr.txt && echo $! &

Why this process is not running in background?

2 Answers2

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