On Sat, 29 Dec 2001, Anthony E. Greene wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Fri, 28 Dec 2001, Patrick Nelson wrote: > >For some reason I just cant get this... > > > >me@mehost>setap -l | grep ESSID: # lists the following > >lo no wireless extensions. > > > >eth0 IEEE 802.11-DS ESSID:"MECOOLAP01" Nickname:"mehost" > >me@mehost> > > > >I'm trying to figure out how to pull the MECOOLAP01 from the line. Any > >suggestions? > > setap -l | grep ESSID: | cut -f 2 -d ':' | cut -f 1 -d ' ' | sed -e > "s/\"//g" > > > That is all one line.
$ line=$(setap -l | grep ESSID) $ essid=$(expr "$line" : ".*ESSID:\"\([^ ]*\)\"") $ echo $essid why this works is left as an exercise for the reader, but it demonstrates the pattern-matching and extraction power of the woefully-overlooked "expr" command. note the efficiency as well, and how, if you wanted, you could combine it all into one line. rday _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
