On Mon, 2010-01-25 at 16:44 +0100, Andreas Schwab wrote: > Garrett Holmstrom <gholms@xxxxxxxxxxxxxxxxx> writes: > > > On Mon, Jan 25, 2010 at 6:09 AM, Bryn M. Reeves <bmr@xxxxxxxxxx> wrote: > >> It's cute isn't it? I had the biggest grin the day I realised that '[' > >> was just another command.. > > > > That's the reason [[ can use special characters like < and > without > > escaping, while [ can't: [[ is a builtin, but [ isn't. > > Well, [ is a builtin too, but [[ is a keyword recognised by the parser, > thus it can use special parsing rules. > <nitpick> [ may be a built in but then again (as its presence in /usr/bin implies) it may not be :). In traditional shells it was a proper command but is often a builtin these days. [[..]] are one of the syntactic elements the bash provides for building compound commands. Regards, Bryn. -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
