shell script does not run properly from cron daemon

Ujio · 07-11-2016, 06:16 AM

Hello

I have a small script like that

Quote:

#!/bin/bash

i=$(/bin/find <path> -name "*.csv" -mmin -15 | /usr/bin/wc -l)

if test $i -eq 0
then
#do something about file not found
else
#do something about file found
fi

The <path> directory has some csv files that modified in last 15 mins. When I run this script from command line there is no issue, it finds the files and do something about file found
But this script could not find anything if it initiated from cron daemon. I checked many times files are always exists in my trials

I tried to change directory to <path> before find command but nothing changed. It's really smalll script but could not find out my error. I need to run this script from cron daemon

Could you help me about it ?
Ujio

keefaz · 07-11-2016, 06:27 AM

You are sure code is not executed in else condition from cron?
I mean the issue could be in "do something about file found" block when executed with cron

Ujio · 07-11-2016, 06:34 AM

Quote:

Originally Posted by keefaz

You are sure code is not executed in else condition from cron?
I mean the issue could be in "do something about file found" block when executed with cron

Hello

I checked it many ways,
When the script initated from cron, $i was always 0 there is no problem with if-then-else block.
Therefore I addedd full path of the commands, tried to change directory into <path> and then run find command but no progress

So I am assuming my problem is in following line

Quote:

i=$(/bin/find <path> -name "*.csv" -mmin -15 | /usr/bin/wc -l)

But could not find what is my error

thanks for your reply
Ujio

keefaz · 07-11-2016, 06:37 AM

For testing, I would check output from find command in cron

Code:

#!/bin/bash
output=/tmp/find_cron.txt

/bin/find <path> -name "*.csv" -mmin -15 > $output

kilgoretrout · 07-11-2016, 07:01 AM

If it runs from the command line but not from cron, it's usually a problem with a path in the script. Cron scripts run in a different environment than your normal bash shell and and an abbreviated path that may be decipherable in your normal bash shell may not be in the cron environment. Try changing your "<path>" to a full path. Don't assume that your cron script is starting from the same place as your bash shell.

Ujio · 07-11-2016, 07:56 AM

I think it was garbage character problem.
I added your recommendations to top of the script, it has started to run correctly then I disabled your recommendations it is still running correctly now I removed your recommendations. It is still running correctly.

But I could not figured out why it was running properly from command line

Thanks for your answers
Ujio

chrism01 · 07-13-2016, 12:32 AM

For debugging in future, try

Code:

#!/bin/bash
set -xv

Shows exactly what the parser sees / is doing