Hi, > Ordinary mounting sees the hard links counts, but 'ls -i' shows > different inodes, and thus they cannot be copied out.
This is an inconsistent behavior of the Linux kernel. For its own reasons it decides not to interpret the inode numbers stored in the ISO image - but it interprets the link counts. The inode numbers of mounted images get computed from the byte address of the files' directory entries. I am not sure whether it is possible for the kernel developers to believe xorriso's inode numbers. If not, then they should not believe in the link counts either. The recomputation in Linux risks false duplicates if the ISO image is larger than 128 GiB. > 'osirrox -lsl' does not even see the counts. A shortcomming, i have to confess. It is not easy to keep track of the link counts during image manipulation. The inode numbers get computed when the image is finally written. Those ISO files which stem from the same disk file form a family of hardlinks which share a single inode number. I have to sort the whole tree in order to count the family members. > -extract and -cpx cannot copy them out. If -hardlinks is set to "on" then the ISO-to-disk commands of a single program run should restore the further family members as hardlinks to the first family member that was copied to disk. The paths of hardlink candidates are cached until the program ends or a new image gets loaded. So restoring by a further program run will not know about previously restored hardlink siblings. If this does not work properly, then i'd need a prescription how to reproduce the problem. > btw, what is the difference, why two copy commands? -extract is the reverse of -map: Copy one file or tree to one target address. -cp*x provides the path semantics of shell command cp. This includes the odd rules for cp -r which depend on whether the target directory already exists. -extract_l provides similar possibilities as -cp_rax but with a less obscure mapping of source to target. > Have I misunderstood something? If you did not use -harlinks "on" before the restore commands: yes. Else: no, you found a bug. I'll have to do something about the displayed link count in xorriso. If it only was not so expensive to determine it. (For now you can take the Linux kernel's word on the link count. So your ISO image does contain recorded hardlink relations.) Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
