Re: Fdescfs updates--coming to a devfs near you!

[Bruce Evans]

On Sun, 17 Sep 2000, Adrian Filipi-Martin wrote:

>       I recently ran into revelant problem with /dev/stdout, while
> working on some software under linux that expected /dev/stdout as an
> argument instead of using stdout.
> 
>       Using the device file breaks, if the process is suid to a non-root
> user.  This is because it cannot open /dev/stdout, which is owned by your
> UID and not the EUID of the process to which the device was passed.  My
> solution was to add the "-" hack and use the existing open descriptor.

Um, open on fdesc devices doesn't check either uid.  It just checks
the access mode.

Perhaps the software expected /dev/stdout to for read-write like a
tty would be.  Then opening /dev/stdout would fail for normal shell
output redirection which only opens for writing.

Bruce



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