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