[Bug 1739] getcwd does not support size zero argument on Solaris

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1739

--- Comment #1 from Yann Rouillard <yann at pleiades.fr.eu.org> 2010-03-26 04:54:57 EST ---
Created an attachment (id=1821)
 --> (https://bugzilla.mindrot.org/attachment.cgi?id=1821)
A little patch to fix the getcwd function usage

Here is a little patch to solve this bug.

It just passes PATH_MAX as the size argument instead of 0.

The allocated space will be often a lot bigger than needed but:

  - the cwd string variable is very short-lived so that is not so
important,

  - when passed a 0 size argument, getcwd under linux seems to allocate
PATH_MAX bytes and realloc to exact string size once it has retrieved
the current directory. So it seems we just avoid a realloc call by
using PATH_MAX instead of 0.

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