Very Computer

#!/bin/sh
DATE=`date '+%Y%m%d`
PN=00
VHOST=/www/vhosts/www.domain.tld
while [ -f $VHOST/backup/htdocs_${DATE}${SERIAL}.tgz ] ; do
         PN=`expr $PN + 01`
done
tar -zcf $VHOST/backup/htdocs_${DATE}${PN}.tgz -C $VHOST htdocs
#EOF

Then i try to some backup
$ ./backup.sh ; ./backup.sh ; ./backup.sh
$ ls -1 htdocs*
htdocs_2005021200.tgz
htdocs_200502121.tgz
htdocs_200502122.tgz

So, as you can see the PN is only one digit.
00
1
2
but must be
00
01
02

There is anyone that know how to do it?
Thanks in advance and sorry for my english,
Federico.

#!/bin/sh
DATE=`date '+%Y%m%d`
PN=00
VHOST=/www/vhosts/www.domain.tld
while [ -f $VHOST/backup/htdocs_${DATE}${PN}.tgz ] ; do
         PN=`expr $PN + 01`
done
tar -zcf $VHOST/backup/htdocs_${DATE}${PN}.tgz -C $VHOST htdocs
#EOF

PN=$(( $PN + 1 ))

   But if you are padding the variable, you should use:

PN=$(( ${PN#0} + 1 ))

Quote:> done
> tar -zcf $VHOST/backup/htdocs_${DATE}${PN}.tgz -C $VHOST htdocs
> #EOF

> Then i try to some backup
> $ ./backup.sh ; ./backup.sh ; ./backup.sh
> $ ls -1 htdocs*
> htdocs_2005021200.tgz
> htdocs_200502121.tgz
> htdocs_200502122.tgz

> So, as you can see the PN is only one digit.
> 00
> 1
> 2
> but must be
> 00
> 01
> 02

> There is anyone that know how to do it?

   Or:

[ $PN -lt 10 ] && PN=0$PN

--
    Chris F.A. Johnson                  http://cfaj.freeshell.org/shell
    ===================================================================
    My code (if any) in this post is copyright 2005, Chris F.A. Johnson
    and may be copied under the terms of the GNU General Public License

Quote:> done
> tar -zcf $VHOST/backup/htdocs_${DATE}${PN}.tgz -C $VHOST htdocs
> #EOF