Re: mention grep on directories will never find anything

[Thomas Schwinge]

Hello!

On Sat, Jun 09, 2007 at 07:13:26PM +0800, address@hidden wrote:
> At this point perhaps mention that
> $ grep . /
> $
> nothing will ever be found, pcregrep too.

#v+
$ grep . /
Binary file / matches
#v-

> And mention why you don't say like
> $ cat /
> cat: /: Is a directory
> (Probably POSIX or something.)
> grep (GNU grep) 2.5.1

#v+
$ cat / | od -t a | head -n 3
0000000 stx nul nul nul  ff nul soh nul   . nul nul nul stx nul nul nul
0000020  ff nul stx nul   .   . nul nul  vt nul nul nul dc4 nul  nl nul
0000040   l   o   s   t   +   f   o   u   n   d nul nul   O eot nul nul
#v-


#v+
$ uname -a
GNU flubber 0.3 GNU-Mach 1.3.99/Hurd-0.3 i686-AT386 GNU
#v-


Regards,
 Thomas

signature.asc
Description: Digital signature