topic Re: word splitting in shell in Operating System - HP-UX

word splitting in shell

Kourla — Tue, 25 Mar 2003 16:46:23 GMT

Hi, can u please somebody tell how to split the word.

I wrote a shell script like this
#!/bin/sh
lv=`bdf |grep /var/opt/nokia |awk '{print $1}'`

In the lv variable I will get some string like "/dev/vg01/lvol2", from this string i have get "vg01" to some other variable.

If is is silly, please don't laugh on me because i am new to shell programming (:

Re: word splitting in shell

Sridhar Bhaskarla — Tue, 25 Mar 2003 16:53:09 GMT

Hi,

Use the seperator "FS" to achieve what you want. For ex., if you want to get only the Logical volume, you would do

bdf |grep /var/opt/nokia |awk '{print $1}'|awk '{FS="/";print $4}'

Use 'df' instead of 'bdf'. If your lvol name is too long, then you may not get what you want.

If you df, you should grep for the second column and then filerout what you want using the above logic.

-Sri

Re: word splitting in shell

Sridhar Bhaskarla — Tue, 25 Mar 2003 16:54:17 GMT

Hi (Again),

BTW, if you want to get 'vg01' out of it, you will use '{FS="/";print $3}'

-Sri

Re: word splitting in shell

Jeff Schussele — Tue, 25 Mar 2003 16:54:33 GMT

Hi Kourla,

Try this

bdf |grep /var/opt/nokia | cut -f 3 -d "/"

This should yield the VG name w/o having to awk. Of course, you could assign the output to a var.

HTH,
Jeff

Re: word splitting in shell

James R. Ferguson — Tue, 25 Mar 2003 16:55:17 GMT

Hi:

'cut' will do here:

# VAR=`echo ${lv}}cut -f3 -d/`

Regards!

...JRF...

Re: word splitting in shell

Robert-Jan Goossens — Tue, 25 Mar 2003 16:59:59 GMT

Hi,

bdf |grep /var/opt/nokia |awk '{FS="/";print $3}'

Robert-Jan.

Re: word splitting in shell

Dietmar Konermann — Tue, 25 Mar 2003 17:11:58 GMT

I like using shell built-ins, especially for scripts that run frequently. fork/exec is expensive... and things sum up.

vg=${lv#/dev/}&& vg=${vg%/*}

Best regards...
Dietmar.

Re: word splitting in shell

Al Langen_1 — Fri, 04 Apr 2003 15:26:41 GMT

Nobody suggested split:

Instead of print $1, use split($1, arg, "/"]);print arg[3]

Re: word splitting in shell

Donny Jekels — Wed, 16 Apr 2003 00:43:35 GMT

Al,

split works well, another way would be

lv=$(bdf | grep /var/opt/nokia | awk -F/ '{print $1}')

6 ways to skin a cat :o)