Mail Archives: cygwin/2005/08/10/15:40:42
On Wed, Aug 10, 2005 at 02:00:18PM -0500, Ken Dibble wrote:
>Christopher Faylor wrote:
>
>>On Wed, Aug 10, 2005 at 02:36:16PM -0400, Christopher Faylor wrote:
>>
>>
>>>On Wed, Aug 10, 2005 at 11:23:00AM -0700, Linda W wrote:
>>>
>>>
>>>>Is there a way to find out in a bash script the cygdrive prefix?
>>>>I thought something simple like
>>>> mount -p|tail -1|cut -f1
>>>>but that incorrectly assumed the fields were tab delimited.
>>>>Since there can be spaces in the cygdrive prefix, I can't
>>>>use space a delimiter, example:
>>>># mount -p
>>>>Prefix Type Flags
>>>>/cyg drive posix path system binmode
>>>>----
>>>>
>>>>
>>>There may be a simpler way to do it, but this seems to work:
>>>
>>>mount -p | sed -n '2s/\([^ ]\) *[^ ][^ ]* *[^ ][^ ]*$/\1/p'
>>>
>>>
>>
>>This is shorter:
>>
>>mount -p | sed -nr '2s/([^ ]) +\S+ +\S+$/\1/p'
>>
>Or you can do it the long, slow wasteful way, which us dullards are required
>to use, so we can figure out why it broke yet again.
>
>#!/bin/bash
>let c=0;
># get the number of fields
>for i in `mount -p | tail -1`; do let c=$c+1; done
>
># if number of fields is greater than 3 because mount point has a space,
>add them
>CUT_FIELDS="--fields=1"
>let i=3;
>while [ $i -lt $c ]
>do
>CUT_FIELDS=$CUT_FIELDS,$i
>let i=$i+1
>done
>
># get the fields
>mount -p | tail -1 | /usr/bin/cut --delimiter=" " $CUT_FIELDS
Personally, if something breaks, I'd rather look at one line than
eighteen. I can't imagine why anyone would find the above an acceptable
solution when it's possible to do it all with one line. And, the above
doesn't handle imbedded spaces.
Btw, a further simplification:
mount -p | sed -nr '2s/(\S) +\S+ +\S+$/\1/p'
cgf
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