Bug in diff ?

[Markus Blau]

Hello,

my name is Markus and I'm a student in computer science. I am using "diff" to 
compare our backup.
The source is a mounted novell directory ( /MB1/progdisk/ ) and the destination 
is a local drive where the files 
are stored (e.g. /backup/Friday/ ).

The backup-server makes an exact copy from the source (no tar, gz...).For this 
I'm using "cp".

But when I want to compare these two directorys binary, diff exits when one 
"source file" is "permission denied".

Here is the syntax I'm using:

diff -r --briefly /MB1/progdisk/ /backup/Friday/

The last line diff ouputs is :
diff: /MB1/progdisk/software/test2.rsw: Permission denied

After this line, diff exits. I will take a look in the source, but perhaps you 
have the answer already.

Thanx for help,

Markus Blau