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Full Discussion: Crontab not processing parameters sent to script.
Top Forums UNIX for Dummies Questions & Answers Crontab not processing parameters sent to script. Post 302943476 by ASGR on Friday 8th of May 2015 08:37:19 PM
Old 05-08-2015
Crontab not processing parameters sent to script.
Hello All,

I'm running Debian on a ThinkPad X1/2G and all seems to be running well.

However, it's got a SSD that needs the trim command run at regular intervals.
I'm implementing this using cron and a shell script, as recommended.

The cron job entries are as follow:
Code:
0 * * * * /etc/cron.hourly/trim /
* 0 * * * /etc/cron.hourly/trim /home

And the script is:
Code:
LOG="/TRIM.LOG"
echo "$(date) Started... $1" >> $LOG

if [ -z "$1" ];
then echo "No parameters" >> $LOG
else echo "Trimming $(fstrim -v $1)" >> $LOG
    fi

I seem to be having a problem getting the parameters from cron
to be recognised by fstrim as parameters in the shell script even though bash
seems to recognise the parameters.

If I run the script './trim /' as root at the command line it works as expected with
bash and fstrim recognising the variables.

Other things tried...
Hard-coding the parameters seems to work.
Checked permissions on script 0755.

Any ideas?
 

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LEARN ABOUT OSF1

uudemon.cleanu

uudemon(4)						     Kernel Interfaces Manual							uudemon(4)

NAME

       uudemon.admin,  uudemon.cleanu,	uudemon.hour,  uudemon.poll  -	Administrative shell scripts for polling remote systems, cleaning up spool
       directories, reporting status to the system administrator, and routine invocations of the uuxqt and uusched daemons

SYNOPSIS

       These shell scripts reside in the following directory:
	  /usr/lib/uucp

DESCRIPTION

       All the scripts can be run from the command line or can be run automatically by the cron daemon. To automatically run the  scripts,  remove
       the comment character (#) from the beginning of the relevant line in the /var/spool/cron/crontabs/uucp file.

       This  script  reports  status  to  the system administrator. It issues the uustat command to find out the status of uucp jobs. It mails the
       results to the uucp login ID. The script may be modified to send mail to any login ID such as the uucp administrative login ID  (uucpa)	or
       root.  This script cleans up the /var/spool/uucp and /var/spool/uucppublic directories by running the uucleanup command. The uucleanup com-
       mand is run with the following parameters: -C7, -D7, X2, -o2, -W1.  This script runs the uusched and uuxqt daemons in the background.  This
       script  polls  the  systems  listed  in	the  /usr/lib/uucp/Poll file.  The uudemon.poll script should be scheduled before the uudemon.hour
       script. This allows uudemon.poll to create any command files before cron runs the uudemon.hour script.

FILES

       Contains the uudemon.admin, uudemon.cleanu, uudemon.hour and uudemon.poll files.  Contains the uucp file.

RELATED INFORMATION

       Commands: cron(8), uucleanup(8), uusched(8), uuxqt(1)

       Files: /usr/lib/uucp delim off

																	uudemon(4)
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