tree a01682acfab764f81abdc08c60ac33320e8fc93a
parent 051175d4fe2bdc7b09da9b303e88881ad4f936ff
author Rich Felker <dalias@aerifal.cx> 1330657685 -0500
committer Rich Felker <dalias@aerifal.cx> 1330657685 -0500

support null buffer argument to getcwd, auto-allocating behavior

this is a popular extension some programs depend on, and by using a
temporary buffer and strdup rather than malloc prior to the syscall,
i've avoided the dependency on free and thus minimized the bloat cost
of supporting this feature.