On Wed, Jan 18, 2006 at 11:27:24PM +0000, Robert Millan wrote:
> Author: rmh
> Date: 2006-01-18 23:27:24 +0000 (Wed, 18 Jan 2006)
> New Revision: 1073
>
> Modified:
> trunk/glibc-2.3-head/sysdeps/kfreebsd/uname.c
> Log:
> Rewrite uname.c to use SYS_uname. Runs 1.54 faster.
>
This is the comment in the FreeBSD kernel, file sys/kern/kern_xxx.c
/*
* This is the FreeBSD-1.1 compatable uname(2) interface. These
* days it is done in libc as a wrapper around a bunch of sysctl's.
* This must maintain the old 1.1 binary ABI.
*/
Then if you look at the code corresponding to the syscall, you will see
that the syscall correspond to a call to the corresponding sysctl, but
truncated:
...
name[0] = CTL_KERN;
name[1] = KERN_OSTYPE;
len = sizeof (uap->name->sysname);
mtx_lock(&Giant);
error = userland_sysctl(td, name, 2, uap->name->sysname, &len,
1, 0, 0, 0);
if (error)
goto done2;
subyte( uap->name->sysname + sizeof(uap->name->sysname) - 1, 0);
...
So, in short the current implementation in our glibc is the correct one.
Bye,
Aurelien
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' [EMAIL PROTECTED] | [EMAIL PROTECTED]
`- people.debian.org/~aurel32 | www.aurel32.net
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