[bug-diffutils] bug#20062: bug#20062: [PATCH] diff: add support for --color

[Paul Eggert]

Giuseppe Scrivano wrote:
> unfortunately there is not a standard way to deal with it.  Last
> time I looked at it, grep was suffering from this issue (Ctrl-C in the
> middle of a color sequence) would leave the terminal in a funny state.

That's a bug in grep, and I just now filed a bug report for it here:

http://bugs.gnu.org/21461

Admittedly it is a pain to handle signals correctly, but as long as we're adding 
the feature to diff we should do it right.  I suggest looking at how GNU 'ls' 
does it; 'ls' is reasonably bullet-proof against the problem.