On Wed, Aug 10, 2005 at 02:47:52PM -0700, L Anderson 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' >> > >Neither of which work if there is a space in the cygdrive prefix; viz a viz: > > Prefix Type Flags >/cyg drive posix path system binmode
Actually yes they will. Did you actually try the above? I did. >However, > >mount -p | sed -nr '2s/([^ ].*) +\S+ +\S+/\1/p' > >does the trick. Here's a little exercise for you. Test your version like this: bash$ echo "/cygdrive a b c system binmode" | sed -nr '1s/([^ ].*) +\S+ +\S+/\1 <<<HERE/p' /cygdrive a b c <<<HERE i.e., trailing spaces, which is what you'd expect from your use of '.*'. Now try testing my last version: bash$ echo "/cygdrive a b c system binmode" | sed -nr '1s/(\S) +\S+ +\S+$/\1<<<HERE/p' /cygdrive a b c<<<HERE So, the only difference between my version and your version is that yours includes trailing spaces. I wouldn't call that a benefit. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
