[Bug-tar] --listed-incremental issue and --list failure.

[Andrew Henry]

Hi!

I'm running tar 1.18 on kernel 2.6.22-14 and trying to perform
incremental backups with script below, levels 0, 1 & 2.  Every time I
create a level 2 after creating a level 0 it just does a full level 0
again but the file size is slightly larger than the original level 0.
It's acting really weird.  If I perform backup of /home which is 14GB
then it performs full backups even when doing level 2.  If I change
*only* the directory in the script to tar /home/andrew/test, and perform
backup level 0 then add files/change files etc, then level 2 works
perfectly.  Why is it failing on larger inputs?

Second issue is that tar --list archive.tar is not working for me at
all.  It just hangs until ctrl-c is pressed.  Is it supposed to output
to stdout?

I run script as follows:

sudo ./backup 0
sudo ./backup 1
or
sudo ./backup 2

my script:

#!/bin/bash
case $1 in
0)
  echo "Executing a level 0 backup request"
  LVL=lvl0
  rm -f /var/log/backups/snar*
  SNARFILE=/var/log/backups/snar
  ;;
1)
  echo "Executing a level 1 backup request"
  LVL=lvl1
  cp -p /var/log/backups/snar /var/log/backups/snar-1
  SNARFILE=/var/log/backups/snar-1
  ;;
2)
  echo "Executing a level 2 backup request"
  LVL=lvl2
  cp -pu /var/log/backups/snar /var/log/backups/snar-1
  cp -p /var/log/backups/snar-1 /var/log/backups/snar-2
  SNARFILE=/var/log/backups/snar-2
  ;;
esac

STAMP=$(date +%Y-week%V-%a)
TARGET_DIR=/home
LOGDIR=/var/log/backups
HOST=`hostname`

tar -cvPf \
    ${TARGET_DIR}/${LVL}-${STAMP}.tar \
    --listed-incremental ${SNARFILE} \
        /home \
            >> ${LOGDIR}/${LVL}-${STAMP}.log


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