[RFC][PATCH] loginuid through procfs (+ a question)

[Steve Grubb]

On Friday 07 January 2005 16:58, Serge Hallyn wrote:
> Attached is a first stab at setting loginuid through /proc/$$/loginuid.
> Compiled and tested here.

OK, spent some time looking at the patch & have some comments:

line 66:
+       length = snprintf((char *)page, count, "%u",
+                               audit_loginuid(task->audit_context));

What if "audit_loginuid" returns a -1? How do we signify its not set. Besides, 
-1 & %u don't get along.

line 77:
+       return length; 

What if length is negative? Shouldn't this be an errno of some kind?

line 99:
+       length = -EFAULT; 

What updates this? We always return -EFAULT.

line 103:
loginuid = simple_strtoul(page, &tmp, 10);

What about errors? For example, if they send -a123 usually you will get a 0 
from stroul. Also, usually you want to convert the number back to a string 
and compare to make sure all characters sent are convertable.

That's all I see...

-Steve