how to compare the output from a bash script with a file?

Question

there is a file, let's call it a reference file, you need to execute the script and compare the reference file with it, a file of 132 kb

result=$(./test.sh)| cmp -s $result test && echo 1||echo 0

I get the wrong output, the test file is identical to the script output, but I get 0

What's the point of the pipe (|) in your command? There is no command to the left of it, and cmp is ignoring stdin anyway, unless a sole - is passed on the commandline (see man cmp). — user1934428
– user1934428, Commented Nov 18, 2022 at 12:31

oguz ismail · Accepted Answer · 2022-11-18 12:38:55Z

3

Just pipe the script's output to cmp.

./script | cmp -s - file

answered Nov 18, 2022 at 12:26

oguz ismail

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