[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Need some shell scripting help

On Sat, Dec 15, 2001 at 12:26:13AM +0000, Sean Neakums wrote:
> I usually do something like this:
>    ls -1 --color=none | while read i ; do
>            do-something-to "$i"
>    done
> which ensures that you don't get tripped up by spaces in filenames,
> although other metacharacters in filenames may cause hassle.

Why the --color=none?  You do know that ls(1) does not honor the UNIX
programming philosophy of presenting the same output regardless of the
classification of the target file descriptor, right?

What do I mean?  If the output of ls is targeted for stdout, it'll give
you all the colors you ask for.  When you pipe it, colors are stripped,
and it prints out as -1 by default.  Now, isn't that just convenient.
The programmer thought he was doing you a favor.  He just forgot to make
the assumption that you'd expect the output to be the same regardless of
its target file descriptor.

Anyway, that's just a small beef with ls I've had for years.

Chad Walstrom <chewie@wookimus.net>                 | a.k.a. ^chewie
http://www.wookimus.net/                            | s.k.a. gunnarr
Get my public key, ICQ#, etc. $(mailx -s 'get info' chewie@wookimus.net)

Attachment: pgpUfRCe4yvq2.pgp
Description: PGP signature

Reply to: