CODEWITHSUNDEEP
cbashcommand-line-interfacemips
Hid
Hid

Reputation: 613

Using cmp with process substitution (stdout)? (Bash)

For our class, we had to make a C program that encodes MIPS instructions into instruction words and also decodes instruction words into MIPS instructions.

I wrote everything already and tested on some cases, but I wanted to test it on a bigger dataset.

We are given the test files: test.asm and test.bin. The .asm file has MIPS instructions and the .bin file has the equivalent instruction words for those MIPS instructions.

My decode function takes in the instruction words from test.bin, converts them to equivalent MIPS instructions and sends it to stdout.

I want to compare the output from my decode function with the MIPS instructions in the test.asm file to see that they are equivalent (that I decoded correctly).

I was told that I could use the cmp command with process substitution to compare the two but I don't know what I would put inside the <(...).

I run my program using: bin/mips -d < test.bin where the -d flag represents decoding.

I was thinking maybe it would be like this, but I'm not sure:

cmp <(cat test.asm) <(bin/mips -d < test.bin)

Upvotes: 0

Views: 1120

Answers (2)

Barmar
Barmar

Reputation: 782683

That command should work, but there's no need to use process substitution with cat, just put the filename there:

cmp test.asm <(bin/mips -d < test.bin)

Upvotes: 4

morgano
morgano

Reputation: 17422

I'm not sure about using the format cmp file1 file2, but you can do file1 | cmp file2 like this:

bin/mips -d test.bin | cmp test.asm

Upvotes: 2

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