mail diff, if no difference no mail

[MoreFeo]

Hi, we need a script that compares 2 files, and if there are any differences mail them.
Right now we make a diff redirected to a file, and we mail that file, but this always sends a mail, even when there are no differences.
I know I have seen in one of these forums the way to do this, but right now I'm not finding the post.
How can I prevent my script from sending a mail if there are no differences?

Thanks

 

[feherke]

Hi

[tt]man test[/tt]

diff /input/file1 /input/file2 > /output/file
test -s /output/file && mail "$mailaddress" < /output/file

Feherke.

http://rootshell.be/~feherke/

 

[MoreFeo]

Thanks

 

[columb]

You could shorten it further to

diff /input/file1 /input/file2 > /output/file || mail me@myserver < /output/file

Ceci n'est pas une signature
Columb Healy