topic "diff" command with variables in Operating System - HP-UX

"diff" command with variables

dev44 — Thu, 22 Oct 2009 16:20:16 GMT

Is there a way to use the diff command with variables?

x=string 1 0
y=string 1 2
diff $x $y

the diff doesn't work.....
usage: diff [ -C n ] [ -S name ] [ -bcefhilnrstw ] dir1 dir2
diff [-C n ] [ -bcefhintw ] file1 file2
diff [ -D string ] [ -biw ] file1 file2

Re: "diff" command with variables

James R. Ferguson — Thu, 22 Oct 2009 16:34:48 GMT

Hi:

As the usage of 'diff' clearly shows, you need to specify two FILES. If you want to compare strings use the shell's 'test':

# X="string 1 0"
# Y="string 1 2"
# [ "${X}" = "${Y}" ] && echo "equal" || echo "not equal"
not equal

Regards!

...JRF...

Re: "diff" command with variables

Hein van den Heuvel — Thu, 22 Oct 2009 19:21:59 GMT

dev, (?)

What is the really problem you are trying to solve?
What are you looking to get out of the difference command that a simple SHELL string compare can not offer?
- Specific output format?
- Your example does not show any switched, but were there options you intended to activate?

fwiw,
Hein.