Hi, If you run diff against two directories where you have file(s) and the only difference is that you have file(s) that only exists in one of the directories, diff will exit with 0. If you use -N och -P it will however exit with 1.
Reading through the man-page, I can’t find any reference that this would be intentionally. Rather I expected it to exit with 1, since there is a difference found. The only other diff I have access to is GNU diff, which seems to exit with 1 in the same scenario. If the behavior is intentionally, I think the man-page should also reflect this. Otherwise diff should be changed to exit with 1 even if -N or -P isn’t used. Both changes are trivial and I can provide a patch if there is some consensus on which behavior is the best. //Ibo
