package: genisoimage version: genisoimage 1.1.11 (Linux) severity: wishlist
ISO9660 has a time stamp granularity of 1/100 seconds and UDF even has microsecond time granularity. genisoimage only records the timestamp with an accuracy of 1 second. Please record the time stamp as exact as possible for each file system. How to reproduce: ~~~~ root@example:/# cd /tmp root@example:/tmp# touch example.txt root@example:/tmp# genisoimage -r -udf -o tmp.iso example.txt I: -input-charset not specified, using utf-8 (detected in locale settings) Total translation table size: 0 Total rockridge attributes bytes: 252 Total directory bytes: 0 Path table size(bytes): 10 Max brk space used 0 419 extents written (0 MB) root@example:/tmp# mkdir tmp root@example:/tmp# mount tmp.iso -t udf tmp mount: /tmp/tmp: WARNING: source write-protected, mounted read-only. root@example:/tmp# stat example.txt tmp/example.txt File: example.txt Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: 806h/2054d Inode: 3415720 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2025-08-09 12:31:25.690050887 +0200 Modify: 2025-08-09 12:31:25.690050887 +0200 Change: 2025-08-09 12:31:25.690050887 +0200 Birth: 2025-08-09 12:31:25.690050887 +0200 File: tmp/example.txt Size: 0 Blocks: 0 IO Block: 2048 regular empty file Device: 700h/1792d Inode: 261 Links: 1 Access: (0444/-r--r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2025-08-09 12:31:25.000000000 +0200 Modify: 2025-08-09 12:31:25.000000000 +0200 Change: 2025-08-09 12:31:25.000000000 +0200 Birth: - root@example:/tmp# umount tmp root@example:/tmp# mount -t iso9660 tmp.iso tmp mount: /tmp/tmp: WARNING: source write-protected, mounted read-only. root@example:/tmp# stat tmp/example.txt File: tmp/example.txt Size: 0 Blocks: 0 IO Block: 2048 regular empty file Device: 700h/1792d Inode: 17031 Links: 1 Access: (0444/-r--r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2025-08-09 12:31:25.000000000 +0200 Modify: 2025-08-09 12:31:25.000000000 +0200 Change: 2025-08-09 12:31:25.000000000 +0200 Birth: - root@example:/tmp# ~~~~
