Date: 04 Dec 1999 23:12:54 -0500 From: Randell Jesup <rjesup@wgate.com> To: Assar Westerlund <assar@sics.se> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Portable way to compare struct stat's? Message-ID: <ybubt86gh4p.fsf@jesup.eng.tvol.net.jesup.eng.tvol.net> In-Reply-To: Assar Westerlund's message of "05 Dec 1999 00:40:14 %2B0100" References: <ybu4se3lomv.fsf@jesup.eng.tvol.net.jesup.eng.tvol.net> <3845712D.F4D51A70@softweyr.com> <v04210100b46cd2f23ff6@[128.113.24.47]> <5lwvqu7as2.fsf@foo.sics.se> <ybuk8muh1mw.fsf@jesup.eng.tvol.net.jesup.eng.tvol.net> <5laenqz34x.fsf@foo.sics.se>
next in thread | previous in thread | raw e-mail | index | archive | help
Assar Westerlund <assar@sics.se> writes:
>Randell Jesup <rjesup@wgate.com> writes:
>> Sounds like what we'd want to build it upon. If the FS doesn't
>> support it, use st_dev/st_ino.
>
>Actually, since it's in the kernel, the default implementation of the
>vnode operation might be:
>
>int
>vop_default_cmp (struct vnode *v1, struct vnode *v2)
>{
> return v1 == v2;
>}
Sure, depending on what's in a vnode (I haven't looked).
I was really thinking of the kernel; I don't know how much of the
interior filesystem structure is exposed to the kernel; I was assuming
that vnodes are something that's opaque (or mostly so) to the kernel,
and are interpreted by the filesystem that created them.
>Or did you mean a fallback in the library function for when the kernel
>doesn't provide the fdcmp (or whatever) system call? That could be
>something like:
That's what I was thinking of, partially. It makes binaries
more transportable, and source if we can get Linux/etc to add it to
their libraries.
>> The real problem is getting people to switch.
>
>You mean application programs? Sure, but the only thing we can do
>about that is implementing support for it, right?
Right; that's where to start.
--
Randell Jesup, Worldgate Communications, ex-Scala, ex-Amiga OS team ('88-94)
rjesup@wgate.com
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?ybubt86gh4p.fsf>