diff between variable

[hokky]

Hi guys,

Just wondering how to diff between two variable

example:

a=`ls dir1`
b=`ls dir2`

diff $a $b --> wont work

Do you know how to do that ? or diff only work for files only ?

 

[p5wizard]

Yes - only for files, so:

ls dir1 >/tmp/lsdir1$$
ls dir2 >/tmp/lsdir2$$

diff /tmp/lsdir1$$ /tmp/lsdir2$$

rm /tmp/lsdir1$$
rm /tmp/lsdir2$$

(the $$ adds the current process' PID to the filenames, so the files are unique enough)


HTH,

p5wizard

 

[columb]

On most versions of Unix you can simply do

diff dir1 dir2

Tested on RedHat Linux and AIX 4.3

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Columb Healy