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Closes Debian Bug #68417:
* rr.c (rrip_work): In helper function add_comp set targused to
zero after malloc, and loop over realloc in case doubling is not
enough. After finalizing the link, set VALID_SL valid flag.
* inode.c (read_disknode): For links use rl->target instead
rl->name.
Closes Debian Bug #69281: Don't use file_start as inode numbers,
but the offset of the directory record in disk_image. This is what
Linux 2.4 does.
* isofs.h (struct disknode): New member struct dirrect *dr.
* inode.c: Fix comment about inode numbers.
(struct node_cache): Fix comment about file_start (it's not unique).
In fact, file_start is invalid for symlinks, and only stored here
for convenience. Maybe caching file_start can be avoided by
rearranging the code.
(inode_cache_find): Change first argument from off_t file_start
to struct dirrect *dr and fix the doc.
Compare cached value of DR with this argument, instead FILE_START.
(diskfs_cached_lookup): Set DR member of DN.
(load_inode): Call inode_cache_find with RECORD instead FILE_START.
Set DR member of DN.
(read_disknode): Set inode number to DR - DISK_IMAGE instead
FILE_START.
* lookup.c (diskfs_get_directs): Remove variable file_start.
Don't calculate file_start. Set D_FILENO to EP - DISK_IMAGE
instead FILE_START.
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* rr.c (gnuext_live): New variable.
(rrip_work): Comprehend AU, TR, MD, and FL, all as GNU
extensions. Recognize GNU extension id field when processing ER
fields.
(release_rrip): Free RR->trans if it's live.
* inode.c (read_disknode): Interpret and install the values set by
AU, TR, MD, and FL extensions.
(diskfs_node_norefs): Free NP->translator if it's set.
* isofs.h (struct disknode): New members `translen' and
`translator'.
* rr.h (struct gn_au, struct gn_tr, struct gn_md, struct gn_fl):
New strucures.
(GNUEXT_SRC, GNUEXT_DES, GNUEXT_ID, GNUEXT_VERS): New macros.
(struct rrip_lookup): New members author, translen, trans,
allmode, flags.
(VALID_AU, VALID_TR, VALID_MD, VALID_FL): New macros.
* Makefile (DIST_FILES): Add, referring to EXTENSIONS.
* EXTENSIONS: New file.
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