tar: listed-incremental behaviour between 1.12 & 1.13.19

[RDBrown]

Between 1.12 and 1.13.17 the listed-incremental file is not updated
while tar writes the archive. The effect is that for example, when a tape
hits end of tape, the listed-incremental file is empty (zero bytes). In
1.12 the listed-incremental file had data for what had been successfully
written and would continue on subsequent backups. 
This allowed unattended backup where multiple volumes would otherwise
be needed.
1.13.19 behaves the same as 1.13.17 .
Testing 1.13.19 again with -M added, the listed-incremental file is still
of zero length when the "Prepare volume #2 for `/dev/st0' and hit return:"
prompt is issued. It remained at zero length after the new tape was inserted.
The listed-incremental file is written if the tar completes, but doesn't
seem to checkpoint along the way any more.


Platform:
Linux (Debian) 2.2.17 #1 Sun Jun 25 09:24:41 EST 2000 i686 unknown

Package: tar
Essential: yes
Status: install ok installed
Priority: required
Section: base
Installed-Size: 988
Maintainer: Bdale Garbee <address@hidden>
Version: 1.13.17-2
Pre-Depends: libc6 (>= 2.1.2)

Prior version was tar 1.12 labeled 1.12-7 in the Debian distribution.

Script used for 1.13.19 test

D=`date +"%Y%m%d"`
BUDIR=/var/log/backup/lst
TGTDEV=/dev/st0
~rdb/src/tar-1.13.19/src/tar -cvf $TGTDEV -g$BUDIR/Full.lst.$D --label 
"full.$D" \
-l /devel /var/home/rdb /var/apps \
--exclude /devel/iso/iso_images/volume.iso \
--exclude devel/iso/iso_images/volume.iso \
> $BUDIR/full.lst.$D 2> $BUDIR/full.lst.$D.err
mt -f $TGTDEV offline


Attached devices: 
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM      Model: DGHS18U          Rev: 03E0
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 03 Lun: 00
  Vendor: DEC      Model: TLZ09     (C)DEC Rev: 0167
  Type:   Sequential-Access                ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 05 Lun: 00
  Vendor: IOMEGA   Model: ZIP 100          Rev: J.03
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 06 Lun: 00
  Vendor: YAMAHA   Model: CDR400t          Rev: 1.0c
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 08 Lun: 00
  Vendor: FUJITSU  Model: MAJ3364MC        Rev: 0114
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 01 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 02 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 03 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 04 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 05 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 06 Lun: 00
  Vendor: MATSHITA Model: CD-ROM CR-506    Rev: 8S07
  Type:   CD-ROM                           ANSI SCSI revision: 02