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// -*- mode: C; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-
// vim: set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:

/*************************************************************************
* Copyright 2009-2012 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software 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.
*
* 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. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/

//!
//! @file util/euca_rootwrap.c
//! Need to provide description
//!

/*----------------------------------------------------------------------------*\
| |
| INCLUDES |
| |
\*----------------------------------------------------------------------------*/

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include "eucalyptus.h"
#include "misc.h"
#include "euca_string.h"

/*----------------------------------------------------------------------------*\
| |
| DEFINES |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| TYPEDEFS |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| ENUMERATIONS |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| STRUCTURES |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| EXTERNAL VARIABLES |
| |
\*----------------------------------------------------------------------------*/

/* Should preferably be handled in header file */

/*----------------------------------------------------------------------------*\
| |
| GLOBAL VARIABLES |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| STATIC VARIABLES |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| STATIC PROTOTYPES |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| MACROS |
| |
\*----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------*\
| |
| IMPLEMENTATION |
| |
\*----------------------------------------------------------------------------*/

//!
//! Main entry point of the application
//!
//! @param[in] argc the number of parameter passed on the command line
//! @param[in] argv the list of arguments
//!
//! @return 1 on failure or the result of execvp() call.
//!
int main(int argc, char **argv)
{
    int rc = 0;
    char **newargv = NULL;
    register int i = 0;
    register int j = 0;

    if (argc <= 1) {
        exit(1);
    }
    // Allocate memory for our new argument list so we can sanitize every arguments...
    if ((newargv = calloc((argc - 1), sizeof(char *))) == NULL) {
        perror("alloc");
        exit(1);
    }
    // Copy an sanitize
    for (i = 0, j = 1; j < argc; i++, j++) {
        if ((newargv[i] = euca_strdup(argv[j])) == NULL) {
            while ((--i) >= 0) {
                free(newargv[i]);
            }
            free(newargv);
            perror("alloc");
            exit(1);
        }
    }

    newargv = argv + 1;

    if (setresuid(((uid_t) 0), ((uid_t) 0), ((uid_t) 0))) {
        perror("setresuid");
    }

    if (setresgid(((gid_t) 0), ((gid_t) 0), ((gid_t) 0))) {
        perror("setresgid");
    }

    rc = execvp(newargv[0], newargv);

    // cleanup
    for (i = 0; i < (argc - 1); i++)
        free(newargv[i]);
    free(newargv[i]);
    exit(rc);
}
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