Crontab help

[ScoobyDoo]

Ive got the following bash script that runs fine with ./run.sh

Code: Select all

!/bin/bash

#/**
# * @file run.sh
# */

# remove guide.xml
cd /home/pi/wg++
rm guide.xml

#backup the current working dir
WG_BCKP_DIR="$(pwd)"

function quit {
    #restore previous working dir
    cd "$WG_BCKP_DIR"
    exit $1;
}

# check if mono can be found
which mono >/dev/null 2>&1 || { echo >&2 "Mono required, but it's not installed."; quit 1; }

# get the absolute path of the link (or relative path)
if [ -L $0 ] ; then
    DIR=$(dirname $(readlink -f $0)) ;
else
    DUTDIR=$(dirname $0) ;
    if [ "${DUTDIR:0:1}" = "/" ]; then
        DIR="$DUTDIR";
    else
        DIR=$PWD/$(dirname $0) ;
    fi
fi ;


mono "$DIR/bin/WebGrab+Plus.exe" "$DIR"

Im trying to get this to run via a crontab on certain days.
My crontab ran under 'root' is
0 2 * * 1,3,5,7 /home/pi/wg++/run.sh > /home/pi/wg++/backup.log 2>&1

The crontab runs fine when it should at the correct time,day etc but the bash script doesnt execute correctly. I get an error saying 'Mono required, but it's not installed'. It seems like when its ran through crontab it doesnt think mono is installed on the pi.

Any ideas please?

[DougieLawson]

Does the PATH= variable in your cron environment include the directory where mono is installed? If not then change "mono" to be "/dir/subdir/subsubdir/mono" with the fully qualified name of your mono executable.

[davef]

Thought a bash script was suppose to start with a shebang.

[ScoobyDoo]

Thanks for your reply.

I'm still doing the basics at the moment, do you know how i can find out what the path is for the mono executable?

[davef]

Code: Select all

#!/bin/bash

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:

and add a path to your mono following this format

Also you can tweak your environment variables.
Do printenv on the command line. I forget how it is edited then do a saveenv

I recall the process is:
- stop the boot process
- printenv
- type in the new PATH line, try not to make any mistakes
- saveenv
- reboot

Placing the PATH line in your Bash Script will be easier.

[davef]

To answer your question:

Code: Select all

sudo find -name mono -print

[ScoobyDoo]

Excellent, thanks for your help. I'll look at sorting out the issue tomorrow.

[ScoobyDoo]

Just a thank you for helping sorting out the issue.

The crontab is working great now with the relative path to mono inserted into the bash script.