1e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project/* 2e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 3e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * All rights reserved. 4e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * 5e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * Redistribution and use in source and binary forms, with or without 6e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * modification, are permitted provided that the following conditions 7e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * are met: 8e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * * Redistributions of source code must retain the above copyright 9e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * notice, this list of conditions and the following disclaimer. 10e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * * Redistributions in binary form must reproduce the above copyright 11e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * notice, this list of conditions and the following disclaimer in 12e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * the documentation and/or other materials provided with the 13e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * distribution. 14e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * 15e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project * SUCH DAMAGE. 27e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project */ 28e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <unistd.h> 29e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <stdio.h> 30e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project#include <sys/types.h> 31e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 32e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Projectint main( void ) 33e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project{ 34e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project uid_t ruid, euid; 35e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 36e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf( "sizeof(uid_t) = %d sizeof(gid_t) = %d\n", sizeof(uid_t), sizeof(gid_t) ); 37e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 38e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project ruid = getuid(); 39e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project euid = geteuid(); 40e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("Start: ruid=%d euid=%d\n", ruid, euid); 41e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 42e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project if (seteuid(9999) != 0) 43e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project perror("seteuid(9999)"); 44e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 45e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project ruid = getuid(); 46e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project euid = geteuid(); 47e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("After set: ruid=%d euid=%d\n", ruid, euid); 48e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 49e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project if (seteuid(0) != 0) 50e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project perror("seteuid(0)"); 51e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 52e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project ruid = getuid(); 53e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project euid = geteuid(); 54e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project printf("After restore: ruid=%d euid=%d\n", ruid, euid); 55e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project 56e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project return 0; 57e16cb84e2324f05334d18dcf5956f20f44262b62The Android Open Source Project} 58