From: lehmann@ans-netz.de (Oliver Lehmann)
Subject: [TUHS] link() syscall implementation
Date: Sun, 15 Nov 2015 15:43:49 +0100 [thread overview]
Message-ID: <20151115154349.Horde.6dHXDRnHFazVunVIgPsob3u@avocado.salatschuessel.net> (raw)
In-Reply-To: <m2y4e0p4d7.fsf@fastmail.com>
Random832 <random832 at fastmail.com> wrote:
> Oliver Lehmann <lehmann at ans-netz.de> writes:
>> OK - it is not temporarily copied to rr4, but directly modfied in
>> rr2 and then assigned to u.u_dirp. It should be "the same" - But
>> - ln(1) does not work with this code. Instead of creating a
>> hardlink, it creates a new empty file (different inode).
>
> Are you sure this is where the problem is?
Not any longer - I tried it again with
u.u_dirp.l = (caddr_t)(((long)uap->linkname) & 0x7F00FFFF);
and it seems to work now - no idea what went wrong the last time
I tried it.
#1 rm /z/tmp/*
#2 echo "test" > /z/tmp/hugo
#3 ln /z/tmp/hugo /z/tmp/walter
ls#4 -li /z/tmp
total 2
2452 -rw-rw-rw- 2 wega system 5 Nov 15 02:44 hugo
2452 -rw-rw-rw- 2 wega system 5 Nov 15 02:44 walter
#5
I still have direct modification of rr2 and not the copy to rr4,
so if I would aim for binary equalness it is still not the same,
but it seems that it can't be done another way.
next prev parent reply other threads:[~2015-11-15 14:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-14 12:34 Oliver Lehmann
2015-11-14 12:56 ` Oliver Lehmann
2015-11-14 15:17 ` Oliver Lehmann
2015-11-14 21:18 ` Random832
2015-11-14 21:42 ` Oliver Lehmann
2015-11-14 23:07 ` Random832
2015-11-15 14:43 ` Oliver Lehmann [this message]
2015-11-14 13:33 ` Random832
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