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count in hex

Posted on 2009-05-19
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Last Modified: 2013-12-26
Hi folks,

I need a script to count in hex when passed from $1. I've managed to figure out so much, don't have time to carry on at the moment and could use come help.

If I try and pass a hex value in any format and try to set it from $1 I get:

root@host/export/home/user$ ./create-map.sh 0xC1
./create-map.sh[7]: 0xC1: bad number

If I leave LUNID as null, it will successfully count from 0. Help appreciated.
#!/usr/bin/ksh
# script to create EMC mappings
 
# set lun to hex
LUNID=$1
typeset -i16 LUNID
 
touch /var/tmp/host-lunmap
 
for dev in `cat /var/tmp/devs-host`; do
        echo "map dev $dev to dir 07C lun=$LUNID" >> /var/tmp/host-lunmap
        echo "map dev $dev to dir 10C lun=$LUNID" >> /var/tmp/host-lunmap
        ((LUNID=LUNID+1))
        echo "LUNID is: ${LUNID#16#}"
done

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Question by:Rowley
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6 Comments
 
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Expert Comment

by:woolmilkporc
ID: 24421931
How about 16#C1  ?
wmp
 
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Accepted Solution

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woolmilkporc earned 500 total points
ID: 24422024
... or use in your script
LUNID=16#$1
and give only C1 as the argument.
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Author Comment

by:Rowley
ID: 24422042
Cool, thanks. I ended up figuring it out anyway as I had some more time to dig. Ended up using:

let LUNID=LUNID+16#$INI

Which seemed to do the trick. I'll try the other suggestions later. Cheers!
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LVL 13

Author Comment

by:Rowley
ID: 24422664
OK...I saw somewhere how to remove the base value from the string, extra brownie points if you could help with that!
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Expert Comment

by:woolmilkporc
ID: 24422954
Well,
what do you mean with 'base value'?
If the goal was to remove the '16#' part, that's what you already did -
${LUNID#16#}
From ksh docs -
${variable#pattern}     If the pattern matches the beginning of the variable's value, delete the shortest part that matches and return the rest
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Author Comment

by:Rowley
ID: 24426848
Ahhh, so I did. Forgot to do the same to the lun=$LUNMAP bit.

heh...

thanks.
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