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Re: Cygwin cygdrive prefix

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Tony Cook
December 6, 2015 22:25
Re: Cygwin cygdrive prefix
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On Fri, Dec 04, 2015 at 03:01:54PM -0500, bulk88 wrote:
> Achim Gratz wrote:
> >Tony Cook writes:
> >>   1.15          cygwin build issue, test failure
> >
> >Sorry to piggy-back on here, but I didn't find where this was discussed
> >on the list (if it was).
> >
> > From the date of the commit I assume that 636efde is (at least in part)
> >what's meant here.  I suggest that the fix should be cherry-picked to
> >the 5.22.1 branch.
> >
> >To the fix itself, using df will eventually fail on some systems even
> >with the "-a" switch since you can't assume that a C: drive exists.  A
> >more appropriate way to obtain the cygdrive prefix is to use
> >
> >readlink "/proc/cygdrive"
> >
> >or `readlink -f /proc/cygdrive` or maybe even `cygpath -u C:` (the
> >latter works even if the drive in question doesn't exist and presumably
> >does so even on older versions of Cygwin that didn't have the /proc
> >pseudo-fs).
> Shellling out is evil perf wise, cyg perl really needs to learn how to use
> cyg specific XS or C funcs.

This code is checking that the results of the cygwin specific XS
functions are sane.


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