dh-b...@online.de 写道: > hello > > i faced a very strange behaviour with the coreutils 8.4 chmod tool: > > i mounted a dvd-ram and didn't recognize that it was mounted read-only > (don't know why, actually). my first thought was that the access rights > to the files were set improper. because the disk stores only archival > stuff for everybody, and everybody means -I- on that system, i decided > to set universal access rights (a quick thought without much > investigation!) as root, i typed: > > chmod -R 777 /media/* > > interestingly, chmod didn't complain about the write-protection but, > instead, the root filesystem got accessed for several seconds. i did a > ctrl-c and found that chmod had actually done a: > > chmod -R 777 /* > > i can't explain this behaviour with common sense and consider it a bug. > I can not reproduce this problem against the upstream chmod,
the scenario you mentioned is simulated as following, j...@jeff-laptop:~$ mount ...... ... /dev/sda8 on /ocfs2 type ocfs2 (ro,heartbeat=none) /dev/scd0 on /media/cdrom0 type udf (ro,nosuid,nodev,utf8,user=jeff) j...@jeff-laptop:~$ sudo touch /ocfs2/b touch: cannot touch `/ocfs2/b': Read-only file system j...@jeff-laptop:~$ sudo chmod -R 777 /ocfs2 chmod: changing permissions of `/ocfs2': Read-only file system chmod: changing permissions of `/ocfs2/lost+found': Read-only file system chmod: changing permissions of `/ocfs2/a': Read-only file system j...@jeff-laptop:~$ sudo chmod -R 777 /media/ chmod: changing permissions of `/media/cdrom0': Read-only file system chmod: changing permissions of `/media/cdrom0/18.mov': Read-only file system chmod: changing permissions of `/media/cdrom0/Masseuse.mp4': Read-only file system chmod: changing permissions of `/media/cdrom0/Miindo2008.mkv': Read-only file system chmod: changing permissions of `/media/cdrom0/SetupX64.avi': Read-only file system chmod: changing permissions of `/media/cdrom0/WDK_6001_18001.iso': Read-only file system could you supply more info? > regards, > Dennis Heuer <dh-b...@online.de> > > Regards, -Jeff
