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"if" Loop not working when executing script using cron

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# 1  
Old 05-13-2014
"if" Loop not working when executing script using cron
I am facing this weird issue where the script is working fine from the command line but when I am executing it from cron though it is working fine but the "if" loop is processing else part though I know that the if part of the logic is true and ideally the loop should execute the if portion.

After executing the script though I am getting the value for the variable SZ=0 but for some reason the script is going to the else portion of the logic. This is only happening while running the script from cron.

Please help.

Code:
#!/bin/bash

for m in `cat /export/home/sk/sk.hosts.list`; do ping -a $m; done > /export/home/sk/sk.ping.host

awk '!/no/' /export/home/sk/sk.ping.host > /export/home/sk/sk.ping.alive

SZ=$(more /export/home/sk/sk.ping.alive | wc -c);

if [ $SZ == 0 ] ;

then mailx -s "All servers are getting backed up" sk@abc.com < /export/home/sk/sk.ping.alive

else

awk '{print $1}' /export/home/sk/sk.ping.alive > /export/home/sk/sk.ping.dead

mailx -s "Following servers are not getting backed up" sk@abc.com < /export/home/sk/sk.ping.dead

fi

Here is my crontab entry:

Code:
30 13 * * * /export/home/sk/bkup.chk.test.sk > /dev/null 2>&1

# 2  
Old 05-13-2014
Hi, have you checked this post from the FAQ section: cron and crontab ?
# 3  
Old 05-13-2014
Use absolute paths as cron jobs execute in a limited environment. more is not needed:
Code:
SZ=$(/usr/bin/wc -c </export/home/sk/sk.ping.alive);

or better (if available on your system)
Code:
SZ=$(/usr/bin/stat -c%s /export/home/sk/sk.ping.alive)

.
Use -eq instead of == as the latter is for string comparison.
This User Gave Thanks to RudiC For This Post:
sk2code
# 4  
Old 05-14-2014
Thanks RudiC I have made the changes as suggested by you and it works fine now.
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