* question on /dev/tap0
@ 2001-03-25 22:58 James Stevenson
2001-03-26 0:27 ` Lennert Buytenhek
0 siblings, 1 reply; 3+ messages in thread
From: James Stevenson @ 2001-03-25 22:58 UTC (permalink / raw)
To: Linux Kernel
Hi
would somebody be able to explain to me
when you try to open /dev/tap0 which is a
character device file which has the permissions
File: "tap0"
Size: 0 Filetype: Character Device
Mode: (0666/crw-rw-rw-)
when tried to open
[mistral@linux /dev]$ cat tap0
cat: tap0: Operation not permitted
and strace shows that it gets a permission error
open("tap0", O_RDONLY|0x8000) = -1 EPERM
is it just me or is this either
a) a bug
b) very misleading
thanks
James
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: question on /dev/tap0
2001-03-25 22:58 question on /dev/tap0 James Stevenson
@ 2001-03-26 0:27 ` Lennert Buytenhek
2001-03-26 9:52 ` David Woodhouse
0 siblings, 1 reply; 3+ messages in thread
From: Lennert Buytenhek @ 2001-03-26 0:27 UTC (permalink / raw)
To: James Stevenson; +Cc: Linux Kernel
Intended behaviour. This is because of the access checks done in the
netlink code. Misleading, yes.
On Sun, 25 Mar 2001, James Stevenson wrote:
>
> Hi
>
> would somebody be able to explain to me
> when you try to open /dev/tap0 which is a
> character device file which has the permissions
>
> File: "tap0"
> Size: 0 Filetype: Character Device
> Mode: (0666/crw-rw-rw-)
>
> when tried to open
>
> [mistral@linux /dev]$ cat tap0
> cat: tap0: Operation not permitted
>
> and strace shows that it gets a permission error
> open("tap0", O_RDONLY|0x8000) = -1 EPERM
>
> is it just me or is this either
> a) a bug
> b) very misleading
>
> thanks
> James
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2001-03-25 22:58 question on /dev/tap0 James Stevenson
2001-03-26 0:27 ` Lennert Buytenhek
2001-03-26 9:52 ` David Woodhouse
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