From 0e6b3e5e97e2e8a25bcfc528dad94edf5220dfeb Mon Sep 17 00:00:00 2001 From: Phillip Susi Date: Sat, 25 Mar 2006 03:08:14 -0800 Subject: [PATCH] udf: fix uid/gid options and add uid/gid=ignore and forget options As Pekka Enberg pointed out, with the if still following the else, you can still get a null uid written to the disk if you specify a default uid= without uid=forget. In other words, if the desktop user is uid=1000 and the mount option uid=1000 is given ( which is done on ubuntu automatically and probably other distributions that use hal ), then if any other user besides uid 1000 owns a file then a 0 will be written to the media as the owning uid instead. Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/filesystems/udf.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'Documentation/filesystems/udf.txt') diff --git a/Documentation/filesystems/udf.txt b/Documentation/filesystems/udf.txt index e5213bc301f..511b4230c05 100644 --- a/Documentation/filesystems/udf.txt +++ b/Documentation/filesystems/udf.txt @@ -26,6 +26,20 @@ The following mount options are supported: nostrict Unset strict conformance iocharset= Set the NLS character set +The uid= and gid= options need a bit more explaining. They will accept a +decimal numeric value which will be used as the default ID for that mount. +They will also accept the string "ignore" and "forget". For files on the disk +that are owned by nobody ( -1 ), they will instead look as if they are owned +by the default ID. The ignore option causes the default ID to override all +IDs on the disk, not just -1. The forget option causes all IDs to be written +to disk as -1, so when the media is later remounted, they will appear to be +owned by whatever default ID it is mounted with at that time. + +For typical desktop use of removable media, you should set the ID to that +of the interactively logged on user, and also specify both the forget and +ignore options. This way the interactive user will always see the files +on the disk as belonging to him. + The remaining are for debugging and disaster recovery: novrs Skip volume sequence recognition -- cgit