Re: dirname() trailing slash Segfault bug

["Carlos O'Donell" <carlos@systemhalted.org>]

On Fri, Aug 15, 2008 at 9:03 AM, Mirsad Todorovac <mtodorov@grf.hr> wrote:
> I have came across a bug in dirname() function of GNU libc.
>
> It is triggered by the following minimal source:
>
> #include <stdio.h>
> #include <string.h>
>
> int main (int argc, char *argv[]) {
>        char  *buf = "usr/";
>
>        char *word = strdup (buf);
>        printf ("dirname ('%s')='%s'\n", buf, dirname (word));
>        free (word);
> }
>
> The trick is to use trailing slash ('/') on path that doesn't start with
> one.

Please file a bug against glibc if you think this is a bug present in
the debian libc6 package.

On libc6 2.7-10 for x86, your testcase works just fine:

carlos@systemhalted:~$ ./test3
dirname ('usr/')='.'

Cheers,
Carlos.