Hi,
Warren Block wrote:
> sync will support hard links with -H
But how shall rsync know that the files in the ISO image stem from
hardlink siblings on the hard disk where the image was produced ?
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I succeeded with this post-processing on a Linux system with bash
after xorriso -for backup ... -extract / livefs :
Learn the block address of content of /rescue/cat in the ISO image:
lba=$(xorriso -indev ../FreeBSD-8.4-BETA1-amd64-livefs.iso \
-find /rescue/cat -exec report_lba -- 2>/dev/null | \
fgrep cat | \
awk '{print $6}')
(Should yield 35682 with that image)
Get a list of all files with that block address, except /rescue/cat :
siblings=$(xorriso -indev ../FreeBSD-8.4-BETA1-amd64-livefs.iso \
-find / -sort_lba -lba_range "$lba" 1 \
-exec report_lba -- \
2>/dev/null | \
grep '^File data lba' | awk '{print $12}' | \
sed -e "s/'//g" | grep -v '^/rescue/cat$' )
(This should yield 137 files:
/rescue/[ ... /rescue/zpool
)
Delete them in livefs/ and re-create them as links to livefs/rescue/cat:
for i in $siblings
do
rm livefs$i
ln livefs/rescue/cat livefs$i
done
This brings the size of livefs/rescue from 676772 KiB to 4924 KiB.
ls -l livefs/rescue reports:
total 676768
-r-xr-xr-x 138 thomas thomas 5007184 2013-03-20 04:14 [
-r-xr-xr-x 138 thomas thomas 5007184 2013-03-20 04:14 atacontrol
...
-r-xr-xr-x 138 thomas thomas 5007184 2013-03-20 04:14 zpool
--------------------------------------------------------------------
(Confessedly one could get the file list as well by ls -l and grepping
for the size of livefs/rescue/cat.)
--------------------------------------------------------------------
Have a nice day :)
Thomas
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