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