1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Pawel Jakub Dawidek under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/types.h> 34 #include <sys/capsicum.h> 35 #include <sys/procdesc.h> 36 #include <sys/wait.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 44 #include "misc.h" 45 46 int 47 main(void) 48 { 49 unsigned int mode; 50 pid_t pid; 51 int pfd; 52 53 printf("1..27\n"); 54 55 mode = 666; 56 CHECK(cap_getmode(&mode) == 0); 57 /* If cap_getmode() succeeded mode should be modified. */ 58 CHECK(mode != 666); 59 /* We are not in capability mode. */ 60 CHECK(mode == 0); 61 62 /* Expect EFAULT. */ 63 errno = 0; 64 CHECK(cap_getmode(NULL) == -1); 65 CHECK(errno == EFAULT); 66 errno = 0; 67 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1); 68 CHECK(errno == EFAULT); 69 70 /* If parent is not in capability mode, child after fork() also won't be. */ 71 pid = fork(); 72 switch (pid) { 73 case -1: 74 err(1, "fork() failed"); 75 case 0: 76 mode = 666; 77 CHECK(cap_getmode(&mode) == 0); 78 /* If cap_getmode() succeeded mode should be modified. */ 79 CHECK(mode != 666); 80 /* We are not in capability mode. */ 81 CHECK(mode == 0); 82 exit(0); 83 default: 84 if (waitpid(pid, NULL, 0) == -1) 85 err(1, "waitpid() failed"); 86 } 87 88 /* If parent is not in capability mode, child after pdfork() also won't be. */ 89 pid = pdfork(&pfd, 0); 90 switch (pid) { 91 case -1: 92 err(1, "pdfork() failed"); 93 case 0: 94 mode = 666; 95 CHECK(cap_getmode(&mode) == 0); 96 /* If cap_getmode() succeeded mode should be modified. */ 97 CHECK(mode != 666); 98 /* We are not in capability mode. */ 99 CHECK(mode == 0); 100 exit(0); 101 default: 102 if (pdwait(pfd) == -1) 103 err(1, "pdwait() failed"); 104 close(pfd); 105 } 106 107 /* In capability mode... */ 108 109 CHECK(cap_enter() == 0); 110 111 mode = 666; 112 CHECK(cap_getmode(&mode) == 0); 113 /* If cap_getmode() succeeded mode should be modified. */ 114 CHECK(mode != 666); 115 /* We are in capability mode. */ 116 CHECK(mode == 1); 117 118 /* Expect EFAULT. */ 119 errno = 0; 120 CHECK(cap_getmode(NULL) == -1); 121 CHECK(errno == EFAULT); 122 errno = 0; 123 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1); 124 CHECK(errno == EFAULT); 125 126 /* If parent is in capability mode, child after fork() also will be. */ 127 pid = fork(); 128 switch (pid) { 129 case -1: 130 err(1, "fork() failed"); 131 case 0: 132 mode = 666; 133 CHECK(cap_getmode(&mode) == 0); 134 /* If cap_getmode() succeeded mode should be modified. */ 135 CHECK(mode != 666); 136 /* We are in capability mode. */ 137 CHECK(mode == 1); 138 exit(0); 139 default: 140 /* 141 * wait(2) and friends are not permitted in the capability mode, 142 * so we can only just wait for a while. 143 */ 144 sleep(1); 145 } 146 147 /* If parent is in capability mode, child after pdfork() also will be. */ 148 pid = pdfork(&pfd, 0); 149 switch (pid) { 150 case -1: 151 err(1, "pdfork() failed"); 152 case 0: 153 mode = 666; 154 CHECK(cap_getmode(&mode) == 0); 155 /* If cap_getmode() succeeded mode should be modified. */ 156 CHECK(mode != 666); 157 /* We are in capability mode. */ 158 CHECK(mode == 1); 159 exit(0); 160 default: 161 if (pdwait(pfd) == -1) 162 err(1, "pdwait() failed"); 163 close(pfd); 164 } 165 166 exit(0); 167 } 168