Red Hat Bugzilla – Bug 229475
File::writable? gives incorrect result if process changes euid/egid
Last modified: 2007-11-30 17:11:57 EST
+++ This bug was initially created as a clone of Bug #222177 +++
When a ruby script running as root changes euid/egid, the results of
File::writable?(f) and File::stat(f).writable? will differ because one uses
glibc's eaccess while the other doesn't (and File::writable? is wrong). The
attached program demonstrates the problem.
This bug is ultimately caused by a bug in glibc's eaccess
(http://sourceware.org/bugzilla/show_bug.cgi?id=3846) but it's a separate
regression in ruby-1.8.5 (compared to earlier versions of the ruby RPM) since
the ruby-1.8.5 rpm's now use eaccess where older ones used ruby's own code to
A simple fix would be to build ruby w/o HAVE_EACCESS as it has been build in the
past until the glibc bug is fixed.
-- Additional comment from firstname.lastname@example.org on 2007-01-10 14:09 EST --
Created an attachment (id=145276)
Ruby script demonstrating the problem (run as root)
seems like got fixed in rawhide. it works fine now.