[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH 05/24] Introduce locking functions for block device setup on NetBSD
On Wed, Jan 20, 2021 at 04:12:29PM +0000, Ian Jackson wrote: > Manuel Bouyer writes ("Re: [PATCH 05/24] Introduce locking functions for > block device setup on NetBSD"): > > Yes, at last the stat call will need to be patched. > > But it seems to rely on a linux-specific behavoir, which is that > > /dev/stdin points to the real file on redirection: > > >ls -l /dev/stdin /proc/self/fd/0 < /etc/passwd > > lrwxrwxrwx 1 root root 15 Apr 30 2019 /dev/stdin -> /proc/self/fd/0 > > lr-x------ 1 bouyer ita-iatos 64 Jan 20 16:54 /proc/self/fd/0 -> /etc/passwd > > > > On NetBSD (and I guess other BSDs) this won't work, as /dev/stdin is a > > specific device: > > >ls -l /dev/stdin > > crw-rw-rw- 1 root wheel 22, 0 Nov 15 2007 /dev/stdin > > > > so stat -L will always return the same data. We can't use the same > > protocol. > > Ah. > > The manpage I am looking at says: > > If no argument is given, stat displays information about the > file descriptor for standard input. > > Here NetBSD has a better command line API than Linux - Linux requires > pratting about with /dev/stdin and NetBSD doesn't. So I think > where on Linux we have > stat .... /dev/stdin > on NetBsd we can simply have > stat .... > with no filename argument. Right, thanks. Then it would need to be done with 2 different calls but I don't think that's a problem (even with the linux version it would not be atomic anyway). > > I think NetBSD's stat(1) also takes different argumnts to specify the > format. NetBSD uses -f, whereas Linux uses -c. So the exact rune > will have to be different. Yes, and NetBSD doens't have %D (only %d) -- Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx> NetBSD: 26 ans d'experience feront toujours la difference --
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |