Re: Can I open a special file with major/minor instead of name?

Clifford Wolf (linker@nightshade.ml.org)
Sun, 14 Jun 1998 07:17:07 -0400 (EDT)

Unfortuanatly, being able to do this would be a security problem.. Since
as a Unix clone, we store device permissions as permisions to a device
file.

On Sun, 14 Jun 1998, Dave Cinege wrote:

> This is the code in do_linuxrc():
>
> (void) open("/dev/tty1",O_RDWR,0);
>
> This is what I want to do:
>
> (void) open( MKDEV(TTY_MAJOR,1) ,O_RDWR,0);
>
> This is why:
> I build all of /dev from /linuxrc, thus /dev/tty1 does not yet exist.
> Right now I have a work around but this way would be cleaner.
>
>
> static int do_linuxrc(void * shell)
> {
> static char *argv[] = { "linuxrc", NULL, };
>
> close(0);close(1);close(2);
> setsid();
> (void) open("/dev/tty1",O_RDWR,0);
> (void) dup(0);
> (void) dup(0);
> return execve(shell, argv, envp_init);
> }
>
>
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>
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>
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