On Sun, Jul 25, 2010 at 09:48:23PM -0400, Kenneth R Westerback wrote: > If you wanted to mount according to the partition type number, DON'T > USE '-t <blah>'. We give you the option to OVERRIDE the partition > type number and you made use of that override. You have taken command
I believe that this thread is the result of documentation error on the mount(8) man page. A patch for the man page is at the end of this message. The problem is that the man page says: The argument following the -t is used to indicate the file system type. The type ffs is the default. This is incorrect. According to lines 248 through 251 of the source file at http://www.openbsd.org/cgi-bin/cvsweb/src/sbin/mount/mount.c?annotate=1.50 the actual default behavior is to check the disklabel's filesystem type: If -t flag has not been specified, and spec contains either a ':' or a '@' then assume that an NFS filesystem is being specified ala Sun. If not, check the disklabel for a known filesystem type. The original poster in this thread is wondering why mount(8) did not check the disklabel's filesystem type when he specified the -t option. The answer is that mount(8) checks the disklabel's filesystem type by default, but that -t overrides that default behavior. --- sbin/mount/mount.8.orig Mon Jul 26 11:59:30 2010 +++ sbin/mount/mount.8 Mon Jul 26 12:48:45 2010 @@ -269,12 +269,15 @@ The argument following the .Fl t is used to indicate the file system type. -The type -.Ar ffs -is the default. +If this option is omitted, then +.Nm +attempts to guess a file system type using the +.Xr disklabel 5 +and other information. The .Fl t option can be used +to override this behavior and to indicate that the actions should only be taken on file systems of the specified type. More than one type may be specified in a comma separated list.
