Test program for reproducing vboxfs bug, see text for details

vboxbug.c

/*
Alleged vboxfs bug test program.

Copyright (c) 2013, Zygmunt Krynicki

All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of zyga nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

INSTRUCTIONS
============

This program can be used to reproduce an alleged buy in VirtualBox guest filesystem.
Tested on Ubuntu 13.04 daily with virtualbox 4.1.22_Ubuntur80657 on a Ubuntu 12.04 guest.

The guest had vboxguestfs mounted on /vagrant
The host exported a directory ~/.cache/tarmac/branches/checkbox/trunk to /vagrant
The guest was in /vagrant/plainbox (a sub-directory) - this failure is not
present in the root of the shared folder.
*/

#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

int main() {
    int errno_copy;
    struct stat stat_buf;
    const char *pathname = "plainbox.egg-info";
    if (mkdir(pathname, 0777) == -1) {
        errno_copy = errno;
        printf("mkdir(...) = -1: errno %d\n", errno_copy);
    } else {
        printf("mkdir(...) didn't fail, this system works ok\n");
        return 0;
    }
    if (stat(pathname, &stat_buf) == -1) {
        errno_copy = errno;
        printf("stat(...) = -1: errno %d\n", errno_copy);
        printf("This system is borked, thanks!\n");
        return 1;
    } else {
        printf("stat(...) didn't fail, this system works ok\n");
        return 0;
    }
}