CODEWITHSUNDEEP
diff
kingkong
kingkong

Reputation: 263

how to get diff filenames with output

is there a way for diff to return the filenames of the files being compared aswell as the output, for example:

instead of :

17c17
<     free ((qu -> vals) - 1);
---
>     free (qu -> vals);

I am looking for:

17c17
file1.c
<     free ((qu -> vals) - 1);
---
file2.c
>     free (qu -> vals);

is it possible?

THanks

Upvotes: 3

Views: 1348

Answers (1)

Max Fichtelmann
Max Fichtelmann

Reputation: 3504

the -u switch does include the filenames:

#!/bin/bash

echo "    free ((qu -> vals) - 1);" > file1.c
echo "    free (qu -> vals);" > file2.c

diff -u file1.c file2.c

output:

--- file1.c 2014-03-13 17:46:43.000000000 -0500
+++ file2.c 2014-03-13 17:46:43.000000000 -0500
@@ -1 +1 @@
-    free ((qu -> vals) - 1);
+    free (qu -> vals);

Upvotes: 3

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