diff script command to mail

Question

Is there a way to add a command to mail this if it finds any changes in the /newchanes.list. mail with an attachment(/changes) saying it found changes and if not then the subject line would say: no chanages has been made.

#!/bin/bash 

if [ ! -f "/suid.old" ]; then                          # note: ! 
   find / -perm -4000 -o -perm -2000 -ls > /suid.old   # note: dash before ls; slash before file 
else 
   find / -perm 4000 -o -perm -2000 -ls > /suid.new 
   diff /suid.old /suid.new > /newchanges.list 
   mv /suid.new /suid.old                              # could be handy 
fi

score 2 · Answer 1 · answered Feb 08 '10 at 19:41

2

You could do something like:

...
diff /suid.old /suid.new > /newchanges.list
if [ $? -eq 0 ]
then
    mail -s "No changed made" <email@domain.com>
else
    mail -s "Changes Found" <email@domain.com> < /newchanges.list
fi
...

diff exits with an exit code of 0 (at least on my ubuntu box, you should verify on your own system the exit codes) if no changes are found.

answered Feb 08 '10 at 19:41

Zypher

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+1 Ya, this makes more sense, going to leave mine in case the exit status of diff doesn't always work like this. – Kyle Brandt Feb 08 '10 at 19:42
You should just be able to `if ! diff /suid.old ...` – Kyle Brandt Feb 08 '10 at 19:43

score 0 · Answer 2 · answered Feb 08 '10 at 19:41

0

You can use the -s switch in a test to see if the resulting file is empty, if not than email. Might be a caveat to that method though...

   -s FILE
          FILE exists and has a size greater than zero

answered Feb 08 '10 at 19:41

Kyle Brandt

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diff script command to mail

2 Answers2