1 /* $OpenBSD: t_mknod.c,v 1.3 2021/12/13 16:56:48 deraadt Exp $ */ 2 /* $NetBSD: t_mknod.c,v 1.2 2012/03/18 07:00:52 jruoho Exp $ */ 3 4 /*- 5 * Copyright (c) 2011 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jukka Ruohonen. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include "macros.h" 34 35 #include <sys/stat.h> 36 37 #include "atf-c.h" 38 #include <errno.h> 39 #include <fcntl.h> 40 #include <limits.h> 41 #include <paths.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 static char path[] = "node"; 47 48 ATF_TC_WITH_CLEANUP(mknod_err); 49 ATF_TC_HEAD(mknod_err, tc) 50 { 51 atf_tc_set_md_var(tc, "descr", 52 "Test error conditions of mknod(2) (PR kern/45111)"); 53 atf_tc_set_md_var(tc, "require.user", "root"); 54 } 55 56 ATF_TC_BODY(mknod_err, tc) 57 { 58 char buf[PATH_MAX + 1]; 59 60 (void)memset(buf, 'x', sizeof(buf)); 61 62 errno = 0; 63 ATF_REQUIRE_ERRNO(EINVAL, mknod(path, S_IFCHR, -1) == -1); 64 65 errno = 0; 66 ATF_REQUIRE_ERRNO(ENAMETOOLONG, mknod(buf, S_IFCHR, 0) == -1); 67 68 errno = 0; 69 ATF_REQUIRE_ERRNO(EFAULT, mknod((char *)-1, S_IFCHR, 0) == -1); 70 71 errno = 0; 72 ATF_REQUIRE_ERRNO(ENOENT, mknod("/a/b/c/d/e/f/g", S_IFCHR, 0) == -1); 73 } 74 75 ATF_TC_CLEANUP(mknod_err, tc) 76 { 77 (void)unlink(path); 78 } 79 80 ATF_TC_WITH_CLEANUP(mknod_exist); 81 ATF_TC_HEAD(mknod_exist, tc) 82 { 83 atf_tc_set_md_var(tc, "descr", "Test EEXIST from mknod(2)"); 84 atf_tc_set_md_var(tc, "require.user", "root"); 85 } 86 87 ATF_TC_BODY(mknod_exist, tc) 88 { 89 int fd; 90 91 fd = open("/etc/passwd", O_RDONLY); 92 93 if (fd >= 0) { 94 95 (void)close(fd); 96 97 errno = 0; 98 ATF_REQUIRE_ERRNO(EEXIST, 99 mknod("/etc/passwd", S_IFCHR, 0) == -1); 100 } 101 102 ATF_REQUIRE(mknod(path, S_IFCHR, 0) == 0); 103 104 errno = 0; 105 ATF_REQUIRE_ERRNO(EEXIST, mknod(path, S_IFCHR, 0) == -1); 106 107 ATF_REQUIRE(unlink(path) == 0); 108 } 109 110 ATF_TC_CLEANUP(mknod_exist, tc) 111 { 112 (void)unlink(path); 113 } 114 115 ATF_TC_WITH_CLEANUP(mknod_perm); 116 ATF_TC_HEAD(mknod_perm, tc) 117 { 118 atf_tc_set_md_var(tc, "descr", "Test permissions of mknod(2)"); 119 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 120 } 121 122 ATF_TC_BODY(mknod_perm, tc) 123 { 124 125 errno = 0; 126 ATF_REQUIRE_ERRNO(EPERM, mknod(path, S_IFCHR, 0) == -1); 127 128 errno = 0; 129 ATF_REQUIRE_ERRNO(EPERM, mknod(path, S_IFBLK, 0) == -1); 130 } 131 132 ATF_TC_CLEANUP(mknod_perm, tc) 133 { 134 (void)unlink(path); 135 } 136 137 ATF_TC_WITH_CLEANUP(mknod_stat); 138 ATF_TC_HEAD(mknod_stat, tc) 139 { 140 atf_tc_set_md_var(tc, "descr", "A basic test of mknod(2)"); 141 atf_tc_set_md_var(tc, "require.user", "root"); 142 } 143 144 ATF_TC_BODY(mknod_stat, tc) 145 { 146 struct stat st; 147 148 (void)memset(&st, 0, sizeof(struct stat)); 149 150 ATF_REQUIRE(mknod(path, S_IFCHR, 0) == 0); 151 ATF_REQUIRE(stat(path, &st) == 0); 152 153 if (S_ISCHR(st.st_mode) == 0) 154 atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFCHR)"); 155 156 ATF_REQUIRE(unlink(path) == 0); 157 158 (void)memset(&st, 0, sizeof(struct stat)); 159 160 ATF_REQUIRE(mknod(path, S_IFBLK, 0) == 0); 161 ATF_REQUIRE(stat(path, &st) == 0); 162 163 if (S_ISBLK(st.st_mode) == 0) 164 atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFBLK)"); 165 166 ATF_REQUIRE(unlink(path) == 0); 167 168 (void)memset(&st, 0, sizeof(struct stat)); 169 170 #ifndef __OpenBSD__ 171 /* OpenBSD only supports FIFO and device special files */ 172 ATF_REQUIRE(mknod(path, S_IFREG, 0) == 0); 173 ATF_REQUIRE(stat(path, &st) == 0); 174 175 if (S_ISREG(st.st_mode) == 0) 176 atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFREG)"); 177 178 ATF_REQUIRE(unlink(path) == 0); 179 #endif 180 } 181 182 ATF_TC_CLEANUP(mknod_stat, tc) 183 { 184 (void)unlink(path); 185 } 186 187 ATF_TP_ADD_TCS(tp) 188 { 189 190 ATF_TP_ADD_TC(tp, mknod_err); 191 ATF_TP_ADD_TC(tp, mknod_exist); 192 ATF_TP_ADD_TC(tp, mknod_perm); 193 ATF_TP_ADD_TC(tp, mknod_stat); 194 195 return atf_no_error(); 196 } 197