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Shell Programming and Scripting

display warning messages on command line

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# 1  
Old 02-21-2009
display warning messages on command line
I have made a script to print size of a slice if it reaches more then 80% which is working fine no problem in it.

I want to add this script in crontab to print this message on command line every half hour if slice size reaches more then 80%.
here is the line below i added on crontab

30 * * * * /osp/local/home/linus/test.sh

The problem is crontab is running but not displaying any text on command line, i cheched it by redirecting test.sh

Code:
#cat test.sh
 
#/usr/sbin/ksh
#set -x
df -k | grep var |grep c1t0d0s3 > test.txt
cat test.txt | nawk -F " " '{printf "%s\n" , $5}' > test1.txt
#m=`cut -d " " -f 1 test1.txt`
sed 's/%//g' test1.txt > red3
m=`cut -d " " -f 1 red3`
if [ $m -gt 80 ];
then
echo your /var size is $m% kindly remove some space"
echo
fi
 
#
#

# 2  
Old 02-21-2009
Quote:
Originally Posted by Danish Shakil
crontab is running but not displaying any text on command line
If Syslog is configured to dump certain facility.priority level messages to the console you could check 'logger'. Or maybe else check 'write' or 'wall' but I don't know if crond process owner would be allowed that.
# 3  
Old 02-22-2009
Quote:
Originally Posted by Danish Shakil
The problem is crontab is running but not displaying any text on command line, i cheched it by redirecting test.sh

Which command line would you want cron to print to? How could it know?
Quote:

Code:
#cat test.sh
 
#/usr/sbin/ksh
#set -x
df -k | grep var |grep c1t0d0s3 > test.txt
cat test.txt | nawk -F " " '{printf "%s\n" , $5}' > test1.txt
#m=`cut -d " " -f 1 test1.txt`
sed 's/%//g' test1.txt > red3
m=`cut -d " " -f 1 red3`
if [ $m -gt 80 ];
then
echo your /var size is $m% kindly remove some space"
echo
fi
 
#
#

Code:
m=$( df -k | 
nawk -F " " '/var/ && /c1t0d0s3/ {
 sub( /%/, "", $5)
 printf "%s\n" , $5 }'
)

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