bin/98414: fts_read disregards permissions of mounted volume

[A. Skrobov]

>Number:         98414
>Category:       bin
>Synopsis:       fts_read disregards permissions of mounted volume
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jun 03 04:20:28 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     A. Skrobov
>Release:        5.4-RELEASE
>Organization:
>Environment:
FreeBSD tyomitch.isnet.ru 5.4-RELEASE FreeBSD 5.4-RELEASE #4: Mon Apr 10 11:28:57 YEKST 2006     tyomitch at tyomitch.isnet.ru:/usr/src/sys/i386/compile/NAT  i386
>Description:
fts_read seems to use the permissions of the mount-point dir, where all other functions use the permissions of the mounted volume itself.

AFAICT, the permissions used by fts_read can't be displayed in any documented way, which increases the confusion.

This issue is likely the cause of Problem Report "bin/33235" as well.
>How-To-Repeat:
-bash-2.05b$ sudo mkdir /mnt/TestPoint
-bash-2.05b$ sudo chmod 000 /mnt/TestPoint
-bash-2.05b$ ls -l /mnt
total 2
d---------  2 root  wheel  512 Jun  3 10:01 TestPoint
-bash-2.05b$ sudo mount /dev/ad2s2d /mnt/TestPoint
-bash-2.05b$ ls -l /mnt
total 2
drwxr-xr-x  3 root  wheel  512 Jun  1 19:29 TestPoint
-bash-2.05b$ ls -lR /mnt
total 2
drwxr-xr-x  3 root  wheel  512 Jun  1 19:29 TestPoint

/mnt/TestPoint:
total 0
ls: fts_read: Permission denied
-bash-2.05b$ ls -lR /mnt/TestPoint
total 12324160
-rw-r--r--  1 root  wheel  4418652160 May 31 17:54 <file names omitted>
-rw-r--r--  1 root  wheel  4439671513 Mar 18 01:52 <file names omitted>
-rw-r--r--  1 root  wheel  3755358680 May 31 19:57 <file names omitted>
-bash-2.05b$ sudo umount /dev/ad2s2d
-bash-2.05b$ sudo chmod 777 /mnt/TestPoint
-bash-2.05b$ ls -l /mnt
total 2
drwxrwxrwx  2 root  wheel  512 Jun  3 10:01 TestPoint
-bash-2.05b$ sudo mount /dev/ad2s2d /mnt/TestPoint
-bash-2.05b$ ls -l /mnt
total 2
drwxr-xr-x  3 root  wheel  512 Jun  1 19:29 TestPoint
-bash-2.05b$ ls -lR /mnt
total 2
drwxr-xr-x  3 root  wheel  512 Jun  1 19:29 TestPoint

/mnt/TestPoint:
total 12324160
-rw-r--r--  1 root  wheel  4418652160 May 31 17:54 <file names omitted>
-rw-r--r--  1 root  wheel  4439671513 Mar 18 01:52 <file names omitted>
-rw-r--r--  1 root  wheel  3755358680 May 31 19:57 <file names omitted>

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: