From: Abramson, Stuart (SAbramson@Wabtec.com)
Date: Thu Oct 02 2003 - 14:11:37 EDT
Thanks to:
Allan Marillier
David Totsch
David's answer below.
Stuart
Stuart Abramson | Off: 412/825-1434 | Cell: 412/417-1567 | email:
sabramson@wabtec.com
-----Original Message-----
From: TOTSCH,DAVID (HP-USA,ex3) [mailto:david.totsch@hp.com]
Sent: Thursday, October 02, 2003 1:22 PM
To: Abramson, Stuart
Subject: RE: [HPADM] ksh test for pattern match ??
Stuart:
if you want the shell to make the decision (not all another program like
grep, awk, expr), you might resort to 'case'
MATCH=""
case $SID_DG in
bkx_al) MATCH=YES ;;
bkx_db) MATCH=YES ;;
bkx_tp) MATCH=YES ;;
rpx_al) MATCH=YES ;;
rpx_db) MATCH=YES ;;
rpx_tp) MATCH=YES ;;
esac
if [[ -n $MATCH ]]
then
# YOU HAVE A MATCH
fi
Knowing that 'case' matches against file name generation
MATCH=""
case $SID_DG in
bkx_[adt][lbp]) MATCH=YES ;;
rpx_[adt][lbp]) MATCH=YES ;;
esac
but that hard to read and allows bkx_ap, etc.
There is an alternation syntax for 'case':
MATCH=""
case $SID_DG in
bkx_al|bkx_db|bkx_tp|rpx_al|rpx_db|rpx_tp) MATCH=YES ;;
esac
But that on is difficult to modify (add/delete matches).
Korn and POSIX shells allow additional file name generation
syntax, making the following possible:
MATCH=""
case $SID_DG in
bkx_@(al|db|tp) MATCH=YES ;;
rpx_@(al|db|tp) MATCH=YES ;;
esac
or you could shorten to
MATCH=""
case $SID_DG in
@(bkx|rpx)_@(al|db|tp) MATCH=YES ;;
esac
However, for future modifiability, I like the ability
to create a file with the list of allowable matches
(lets say that file is pointed to by VALID_MATCHES):
if print $SID_DG | grep -f ${VALID_MATCHES} -q
then
#match found
fi
Be sure that your list in VALID_MATCHES uses regular expressions
to match exact entries (eg ^bkx_al$ ).
Or, if you want the list of valid matches to be in the script
if grep -q "^${SID_DG}$"
then
MATCH=YES
fi <<- End-of-List
bkx_al
bkx_db
bkx_tp
rpx_al
rpx_db
rpx_tp
End-of-List
In the above, "<<-" is special in that the dash tells the shell
to remove leading tabs.
Enjoy,
-dlt-
> -----Original Message-----
> From: Abramson, Stuart [mailto:SAbramson@Wabtec.com]
> Sent: Thursday, October 02, 2003 9:47 AM
> To: Hpux-Admin (E-mail)
> Subject: [HPADM] ksh test for pattern match ??
>
>
> hpux-admins:
>
> Is there a better way to do this?
>
> I don't want any partial matches. Only exact matches to one case.
>
> If there is a match, I process a bunch of stuff.
>
> If there is no match, I exit with message.
>
> Stuart
>
> =============================================
>
>
> SID_DG=$1
> VALID_CASES=" bkx_al bkx_db bkx_tp
> rpx_al rpx_db rpx_tp"
> MATCH="NO"
>
> # Check for input request case match
>
> for CASE in $( echo $VALID_CASES )
> do
> if [[ $SID_DG = $CASE ]]
> then
> # We have a valid establish request
> MATCH="YES"
> fi
> done
>
> Stuart Abramson | Off: 412/825-1434 | Cell: 412/417-1567 | email:
> sabramson@wabtec.com
>
>
>
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