Date: Mon, 23 Jul 2001 02:42:20 +0200 From: Christoph Hellwig <hch@caldera.de> To: Bakul Shah <bakul@bitblocks.com> Cc: tlambert2@mindspring.com, Joshua Goodall <joshua@roughtrade.net>, Bruce Evans <bde@zeta.org.au>, freebsd-fs@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: flags on symlinks Message-ID: <20010723024220.A19865@caldera.de> In-Reply-To: <200107230016.UAA17001@renown.cnchost.com>; from bakul@bitblocks.com on Sun, Jul 22, 2001 at 05:16:11PM -0700 References: <3B5B4F7E.8C48801E@mindspring.com> <200107230016.UAA17001@renown.cnchost.com>
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On Sun, Jul 22, 2001 at 05:16:11PM -0700, Bakul Shah wrote:
> Well, I won't mind if {,l}ch{mod,own,flags} etc become library
> routines. Something like:
>
> int
> chown(const char* path, uid_t owner, gid_t group) {
> int fd, err;
>
> fd = open(path, O_EXCL);
> if (!fd)
> return errno;
> err = fchown(fd, owner, group);
> close(fd);
> return err;
> }
The problem is that it uses a file-descriptor, which means it will
fail if the maximum number of fds (process-wide or globally) is
execeeded.
Another problem is that open on devices may give all kinds of
side-effects (e.g. enabling interrups, awaking from suspend state,
not to mention clone devices) that it is generally considered
a bad idea to open for a metadata change.
And I think this was discusses as zillion times before :P
Christoph
--
Whip me. Beat me. Make me maintain AIX.
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