I was making a bash script, cron_its_servicenow.sh, that uses cURL and regex to grab 6 chart images (that are encoded in base64) from 6 ServiceNow published reports, and then writing them to a file, page_its.php. Here’s the code:
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#!/bin/bash file=/var/www/dashboard/it/page_its.php urls=( "https://*.service-now.com/sys_report_display.do?sysparm_report_id=*1*" "https://*.service-now.com/sys_report_display.do?sysparm_report_id=*2*" "https://*.service-now.com/sys_report_display.do?sysparm_report_id=*3*" "https://*.service-now.com/sys_report_display.do?sysparm_report_id=*4*" "https://*.service-now.com/sys_report_display.do?sysparm_report_id=*5*" "https://*.service-now.com/sys_report_display.do?sysparm_report_id=*6*" ) for (( i = 0 ; i < ${#urls[@]} ; i++ )) do result[$i]=`curl -s ${urls[$i]} | sed -rn 's/.*<img usemap="#" class="chart" src="(.+)"><\/img>.*/\1/p'` done echo '<div class="row shadow">' > $file echo '<h3>IT Services</h3>' >> $file echo '<div class="col-md-4"><img src="'${result[0]}'" class="img-responsive" /></div>' >> $file echo '<div class="col-md-4"><img src="'${result[1]}'" class="img-responsive" /></div>' >> $file echo '<div class="col-md-4"><img src="'${result[2]}'" class="img-responsive" /></div>' >> $file echo '</div>' >> $file echo '<div class="row shadow">' >> $file echo '<div class="col-md-4"><img src="'${result[3]}'" class="img-responsive" /></div>' >> $file echo '<div class="col-md-4"><img src="'${result[4]}'" class="img-responsive" /></div>' >> $file echo '<div class="col-md-4"><img src="'${result[5]}'" class="img-responsive" /></div>' >> $file echo '</div>' >> $file |
It was working fine when I was running it in SSH like this:
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root@server ~# /var/www/dashboard/it/cron_its_servicenow.sh |
No errors, and the page_its.php file was getting the data written to it.
But then I logged into the web control panel and set up the Scheduled Cron Job, all these errors popped up when I ran the cron job:
Execute Cron Job
Output from command /var/www/dashboard/it/cron_its_servicenow.sh ..
What??
I couldn’t find out what was wrong. I was trying things like changing echo to cat, adding tee, using sudo, etc. It turns out that it was such a simple mistake… I forgot to set the file permissions of page_its.php to be writable.
Solution: I did chmod 666 page_its.php, and all is working well now.
Execute Cron Job
Output from command /var/www/dashboard/it/cron_its_servicenow.sh ..
Excellent!