cd9660: Apply the file and directory mode masks bits to all 12 access bits

This permits the mask bits to control the upper 3 bits used for setuid,
setgid, and sticky permissions.  While here, clarify the manpage language
as non-Rockridge volumes with extended attributes can also supply users
and groups along with permissions.

Reviewed by:	olce
Fixes:		82f2275b73e5 cd9660: Add support for mask,dirmask,uid,gid options
Differential Revision:	https://reviews.freebsd.org/D47357

1 files changed, 12 insertions, 11 deletions

diff --git a/sbin/mount_cd9660/mount_cd9660.8 b/sbin/mount_cd9660/mount_cd9660.8
index 017ad7ee9a11..19c3ca5cf012 100644
--- a/sbin/mount_cd9660/mount_cd9660.8
+++ b/sbin/mount_cd9660/mount_cd9660.8
@@ -73,30 +73,31 @@ version number.
 .It Fl G Ar group
 Set the group of the files in the file system to
 .Ar group .
-The default gid on non-Rockridge volumes is zero.
+The default gid on volumes without extended attributes or Rockridge extensions
+is zero.
 .It Fl U Ar user
 Set the owner of the files in the file system to
 .Ar user .
-The default uid on non-Rockridge volumes is zero.
+The default uid on volumes without extended attributes or Rockridge extensions
+is zero.
 .It Fl m Ar mask
 Specify the maximum file permissions for files
 in the file system.
-(For example, a
+For example, a
 .Ar mask
 of
-.Li 755
-specifies that, by default, the owner should have
-read, write, and execute permissions for files, but
-others should only have read and execute permissions).
+.Li 544
+limits the owner to
+read and execute permissions for files and
+others to only read permission.
 See
 .Xr chmod 1
 for more information about octal file modes.
-Only the nine low-order bits of
-.Ar mask
-are used.
 The default
 .Ar mask
-on non-Rockridge volumes is 755.
+is 7777.
+The default permissions on volumes without extended attributes or Rockridge
+extensions is 555.
 .It Fl M Ar mask
 Specify the maximum file permissions for directories
 in the file system.