topic Block or Network file? in Operating System - HP-UX

Block or Network file?

Robin Abecasis — Wed, 06 Jun 2001 15:28:15 GMT

Basically, why do :

[[ -b /dev/vg00/lvol1 ]] && echo yes || echo no

and

[[ -n /dev/vg00/lvol1 ]] && echo yes || echo no

both return yes?

Why is KSH treating the device file as both a Block file (expected) and a Network file (unexpected)? This happen under HPUX 10.20 and 11.

Cheers in advance,
Robin

Re: Block or Network file?

James R. Ferguson — Wed, 06 Jun 2001 15:36:54 GMT

Hi Robin:

The 'n' option of 'test' tests for a non-zero string length.

...JRF...

Re: Block or Network file?

Robin Abecasis — Wed, 06 Jun 2001 15:42:54 GMT

DOh! Sorry for such a silly question! I somehow got it into my head that the '-n' was for checking whether the file was a 'network special file' as described by ls. :-|

Robin