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Home > Archive > Unix Shell > January 2006 > directory test
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| Rob Bradford 2006-01-20, 6:03 pm |
| I'm trying to test the existance of a directory using -f option of the test
command (bourne shell). No matter how I phrase it $? always returns false
even if the directory exists. (HP-UX 11i)
Any help would be appreciated.
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| Ed Morton 2006-01-20, 6:03 pm |
| Rob Bradford wrote:
> I'm trying to test the existance of a directory using -f option of the test
> command (bourne shell). No matter how I phrase it $? always returns false
> even if the directory exists. (HP-UX 11i)
>
> Any help would be appreciated.
>
>
use -d (for directory), not -f (for file).
Ed.
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| Rodrick Brown 2006-01-21, 2:49 am |
|
"Rob Bradford" <rob.bradford@lineone.net> wrote in message
news:dqrfvc$5ab$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com...
> I'm trying to test the existance of a directory using -f option of the
> test command (bourne shell). No matter how I phrase it $? always returns
> false even if the directory exists. (HP-UX 11i)
>
> Any help would be appreciated.
>
$ [[ -d / ]] && echo $?
0
$
| |
| jhding@tom.com 2006-01-23, 2:55 am |
| Rodrick Brown wrote:
> "Rob Bradford" <rob.bradford@lineone.net> wrote in message
> news:dqrfvc$5ab$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com...
>
> $ [[ -d / ]] && echo $?
> 0
> $
I perfer the following command:
<cmd>for f in `find . -name "*.c"`; do basename $f; done</cmd>
In fact, you can do even more processing with $f if you like, such as:
<cmd>for f in `find . -name "*.c"`; do basename $f; dirname $f;
done</cmd>
Good luck!
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| jhding@tom.com 2006-01-23, 2:55 am |
| <cmd> if [[ -d / ]]; then echo $? hello; fi</cmd>
will return <stdout>0 hello</stdout>.
Funny? 0 means true, 1 means false.  )
Try the following commands if you were not able to believe it:
<cmd> true && echo $?</cmd>
<cmd>false || echo $?</cmd>
Caution: Csh is different. Csh is more like C, but sh and bash are not.
| |
| Stephane CHAZELAS 2006-01-23, 2:55 am |
| 2006-01-22, 20:31(-08), jhding@tom.com:
> <cmd> if [[ -d / ]]; then echo $? hello; fi</cmd>
> will return <stdout>0 hello</stdout>.
> Funny? 0 means true, 1 means false. )
No, 0 means OK, anything else means an error, the value of $?
may give an indication of the value of the error.
> Try the following commands if you were not able to believe it:
> <cmd> true && echo $?</cmd>
> <cmd>false || echo $?</cmd>
>
> Caution: Csh is different. Csh is more like C, but sh and bash are not.
No, it's all the commands that have that logic, if csh behaved
otherwise, it would be definitely broken an unusable.
$ csh -c 'true && echo $status'
0
$ csh -c 'false || echo $status'
1
--
Stéphane
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