stat-prefetch: fix dirname(3) usage

glibc dirname() modify the string it is given and returns it.
glusterfs takes this behavior for granted, and assume that if it
gives a malloc'ed string to dirname(), then it can free()) the
return value.

Here is what SUSv2 says:
http://opengroup.org/onlinepubs/007908799/xsh/dirname.html
"The dirname() function may modify the string pointed to by path,
and may return a pointer to static storage"

At least NetBSD returns a static storage. glusterfs will return it to
a calling function that has the responsability to free it, causing
a SIGSEGV.

Thanks to: Emmanuel Dreyfus <manu@netbsd.org>

Signed-off-by: Anand Avati <avati@gluster.com>

BUG: 2923 (NetBSD port)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2923

0 files changed, 0 insertions, 0 deletions