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With -update_r : detecting hardlink splits and fusions on disk

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Thomas Schmitt
2009-06-15 12:15:12 +00:00
parent b7bb047464
commit bf702dc38e
6 changed files with 634 additions and 52 deletions
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25
libisoburn/trunk/xorriso/xorriso.1
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@ -668,30 +668,37 @@ terminal where xorriso runs. Before attributing this local character set
to the produced ISO image, check whether the terminal properly displays
all intended filenames, especially exotic national characters.
.TP
\fB\-hardlinks\fR "on"|"off"
\fB\-hardlinks\fR "on"|"off"|"without_update"|"start_update"|"end_update"
Enable or disable loading and recording of hardlink relations.
.br
In default mode "off", iso_rr files lose their inode numbers at image load
time. Each iso_rr file object which has no inode number at image generation
time will get a new unique inode number if -compliance is set to -new_rr.
time will get a new unique inode number if -compliance is set to new_rr.
.br
Mode "on" preserves eventual inode numbers from the loaded image.
When committing a session it searches for families of iso_rr files
which stem from the same disk file, have identical content and have
which stem from the same disk file, have identical content filtering and have
identical properties. The family members all get the same inode number.
Whether these numbers are respected at mount time depends on the operating
system.
.br
xorriso commands which extract files from an ISO image try to restore files
with the same inode number as hard links. This applies only to files which
Commands -update and -update_r detect splits and fusions of hard links in
filesystems which have stable device and inode numbers.
Multiple -update_r commands should be surrounded by -hardlinks "start_update"
and -hardlinks "end_update". This avoids multiple sorting of ISO image nodes.
"start_update" implies "on".
Mode "without_update" avoids hardlink processing during update commands.
.br
xorriso commands which extract files from an ISO image try to hardlink files
with identical inode number. This applies only to files which
get extracted during execution of that same command. A large number of
hardlink families may exhaust -temp_mem_limit if not -osirrox option
"sort_lba_on" is in effect.
.br
Mode "on" automatically enables \fB\-compliance new_rr\fR. This may be
overridden by a following -compliance old_rr . In this case the resulting
image will violate the RRIP-1.10 specs for entry PX in the same way as
mkisofs does.
Hardlink processing automatically enables \fB\-compliance new_rr\fR.
This may be overridden by a following -compliance old_rr . In this case
the resulting image will violate the RRIP-1.10 specs for entry PX in
the same way as mkisofs does.
.TP
\fB\-acl\fR "on"|"off"
Enable or disable processing of ACLs.