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 #include <sys/types.h> 32 #include <sys/capsicum.h> 33 #include <sys/procdesc.h> 34 #include <sys/wait.h> 35 36 #include <err.h> 37 #include <errno.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <unistd.h> 41 42 #include "misc.h" 43 44 int 45 main(void) 46 { 47 unsigned int mode; 48 pid_t pid; 49 int pfd; 50 51 printf("1..27\n"); 52 53 mode = 666; 54 CHECK(cap_getmode(&mode) == 0); 55 /* If cap_getmode() succeeded mode should be modified. */ 56 CHECK(mode != 666); 57 /* We are not in capability mode. */ 58 CHECK(mode == 0); 59 60 /* Expect EFAULT. */ 61 errno = 0; 62 CHECK(cap_getmode(NULL) == -1); 63 CHECK(errno == EFAULT); 64 errno = 0; 65 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1); 66 CHECK(errno == EFAULT); 67 68 /* If parent is not in capability mode, child after fork() also won't be. */ 69 pid = fork(); 70 switch (pid) { 71 case -1: 72 err(1, "fork() failed"); 73 case 0: 74 mode = 666; 75 CHECK(cap_getmode(&mode) == 0); 76 /* If cap_getmode() succeeded mode should be modified. */ 77 CHECK(mode != 666); 78 /* We are not in capability mode. */ 79 CHECK(mode == 0); 80 exit(0); 81 default: 82 if (waitpid(pid, NULL, 0) == -1) 83 err(1, "waitpid() failed"); 84 } 85 86 /* If parent is not in capability mode, child after pdfork() also won't be. */ 87 pid = pdfork(&pfd, 0); 88 switch (pid) { 89 case -1: 90 err(1, "pdfork() failed"); 91 case 0: 92 mode = 666; 93 CHECK(cap_getmode(&mode) == 0); 94 /* If cap_getmode() succeeded mode should be modified. */ 95 CHECK(mode != 666); 96 /* We are not in capability mode. */ 97 CHECK(mode == 0); 98 exit(0); 99 default: 100 if (pdwait(pfd) == -1) 101 err(1, "pdwait() failed"); 102 close(pfd); 103 } 104 105 /* In capability mode... */ 106 107 CHECK(cap_enter() == 0); 108 109 mode = 666; 110 CHECK(cap_getmode(&mode) == 0); 111 /* If cap_getmode() succeeded mode should be modified. */ 112 CHECK(mode != 666); 113 /* We are in capability mode. */ 114 CHECK(mode == 1); 115 116 /* Expect EFAULT. */ 117 errno = 0; 118 CHECK(cap_getmode(NULL) == -1); 119 CHECK(errno == EFAULT); 120 errno = 0; 121 CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1); 122 CHECK(errno == EFAULT); 123 124 /* If parent is in capability mode, child after fork() also will be. */ 125 pid = fork(); 126 switch (pid) { 127 case -1: 128 err(1, "fork() failed"); 129 case 0: 130 mode = 666; 131 CHECK(cap_getmode(&mode) == 0); 132 /* If cap_getmode() succeeded mode should be modified. */ 133 CHECK(mode != 666); 134 /* We are in capability mode. */ 135 CHECK(mode == 1); 136 exit(0); 137 default: 138 /* 139 * wait(2) and friends are not permitted in the capability mode, 140 * so we can only just wait for a while. 141 */ 142 sleep(1); 143 } 144 145 /* If parent is in capability mode, child after pdfork() also will be. */ 146 pid = pdfork(&pfd, 0); 147 switch (pid) { 148 case -1: 149 err(1, "pdfork() failed"); 150 case 0: 151 mode = 666; 152 CHECK(cap_getmode(&mode) == 0); 153 /* If cap_getmode() succeeded mode should be modified. */ 154 CHECK(mode != 666); 155 /* We are in capability mode. */ 156 CHECK(mode == 1); 157 exit(0); 158 default: 159 if (pdwait(pfd) == -1) 160 err(1, "pdwait() failed"); 161 close(pfd); 162 } 163 164 exit(0); 165 } 166