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Re: bug#6331: [sshfs] df reports wrong disk space usage on solaris

From: Jim Meyering
Subject: Re: bug#6331: [sshfs] df reports wrong disk space usage on solaris
Date: Wed, 16 Jun 2010 13:20:08 +0200

Bruno Haible wrote:
> Hi Jim,
>> However, I'm not sure it's portable enough.
>> Do you know when the f_frsize member began to be useful?
>> Without knowing that, I cannot judge whether this introduces
>> a portability problem on older glibc, kernels or file systems.
> There are also other platforms than glibc/Linux.
> Upon inspection, it appears that the fu_cv_sys_stat_statfs2_bsize
> test in m4/fsusage.m4 (labelled "AIX") would succeed on
>   glibc, MacOS X, FreeBSD, NetBSD, OpenBSD, AIX, HP-UX, Solaris, Cygwin
> and out of these, only
>   glibc/Linux, glibc/Hurd, Solaris
> do have an f_frsize member in 'struct statfs'.
> But that test is preceded by the test for fu_cv_sys_stat_statvfs (labelled
> "SVR4", which I would expect to succeed on
>   glibc/Hurd, FreeBSD, NetBSD, AIX, HP-UX, IRIX, Solaris, Cygwin, Interix, 
> BeOS
> So it may be that actually only glibc/Linux platforms are affected by Miklos'
> patch, but without a clear overview of which platform ends up using which 
> code,
> I can't assert this.

Hi Bruno,

I realize that there is some small risk for other platforms,
but am willing to discover that if/when people actually
test the new code on those systems.

If necessary, we add additional guards later.

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