Hi, Chris Adams wrote: > Although: now that I look at the ISO structure with isoinfo, it does > appear that the files are not actually duplicated
ECMA-119 (ISO 9660 for free) allows the equivalent to hardlinking by 6.5.1 Relation to File Sections ... A File Section may be part of more than one file and may occur more than once in the same file. A File Section may be identified by more than one record in the same or a different directory. As you found out, genisoimage makes use of this prescription by putting together hardlink siblings from the input filesystem. libisofs underneath xorriso does the same. ----------------------------------------------------------------------- Rock Ridge 1.12 as add-on to ISO9660 records the equivalent to inode numbers as "File Serial Number" in PX entries. But the Fedora ISOs i have (from genisoimage and xorriso) are equipped with PX entries of version 1.10 which do not bear this field. Whatever, the Linux kernel ignores the recorded numbers of version 1.12 and rather computes the inode numbers from the byte address of the directory record divided by 32. So two different file paths get two different artificial inode numbers. (See isofs_get_ino() in fs/isofs/isofs.h.) The consequence is that the hard-link-like relations do not show up in mounted ISOs and that ISOs made from mounted ISOs don't bear this relation either. Have a nice day :) Thomas _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
