1 /* $OpenBSD: t_mkdir.c,v 1.2 2021/12/13 16:56:48 deraadt Exp $ */ 2 /* $NetBSD: t_mkdir.c,v 1.2 2011/10/15 07:38:31 jruoho Exp $ */ 3 4 /*- 5 * Copyright (c) 2008, 2011 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe and 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 #include <sys/wait.h> 37 38 #include "atf-c.h" 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <limits.h> 42 #include <pwd.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 ATF_TC(mkdir_err); 49 ATF_TC_HEAD(mkdir_err, tc) 50 { 51 atf_tc_set_md_var(tc, "descr", "Checks errors from mkdir(2)"); 52 } 53 54 ATF_TC_BODY(mkdir_err, tc) 55 { 56 char buf[PATH_MAX + 1]; 57 int fd; 58 59 (void)memset(buf, 'x', sizeof(buf)); 60 61 fd = open("/etc", O_RDONLY); 62 63 if (fd >= 0) { 64 65 (void)close(fd); 66 67 errno = 0; 68 ATF_REQUIRE_ERRNO(EEXIST, mkdir("/etc", 0500) == -1); 69 } 70 71 errno = 0; 72 ATF_REQUIRE_ERRNO(EFAULT, mkdir((void *)-1, 0500) == -1); 73 74 errno = 0; 75 ATF_REQUIRE_ERRNO(ENAMETOOLONG, mkdir(buf, 0500) == -1); 76 77 errno = 0; 78 ATF_REQUIRE_ERRNO(ENOENT, mkdir("/a/b/c/d/e/f/g/h/i/j/k", 0500) == -1); 79 } 80 81 ATF_TC_WITH_CLEANUP(mkdir_perm); 82 ATF_TC_HEAD(mkdir_perm, tc) 83 { 84 atf_tc_set_md_var(tc, "descr", "Checks permissions with mkdir(2)"); 85 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 86 } 87 88 ATF_TC_BODY(mkdir_perm, tc) 89 { 90 errno = 0; 91 ATF_REQUIRE_ERRNO(EACCES, mkdir("/usr/__nonexistent__", 0500) == -1); 92 } 93 94 ATF_TC_CLEANUP(mkdir_perm, tc) 95 { 96 (void)rmdir("/usr/__nonexistent__"); 97 } 98 99 ATF_TC_WITH_CLEANUP(mkdir_mode); 100 ATF_TC_HEAD(mkdir_mode, tc) 101 { 102 atf_tc_set_md_var(tc, "descr", "Test that UIDs and GIDs are right " 103 "for a directory created with mkdir(2)"); 104 atf_tc_set_md_var(tc, "require.user", "root"); 105 } 106 107 ATF_TC_BODY(mkdir_mode, tc) 108 { 109 static const char *path = "/tmp/mkdir"; 110 struct stat st_a, st_b; 111 struct passwd *pw; 112 pid_t pid; 113 int sta; 114 115 (void)memset(&st_a, 0, sizeof(struct stat)); 116 (void)memset(&st_b, 0, sizeof(struct stat)); 117 118 pw = getpwnam("nobody"); 119 120 ATF_REQUIRE(pw != NULL); 121 ATF_REQUIRE(stat("/tmp", &st_a) == 0); 122 123 pid = fork(); 124 ATF_REQUIRE(pid >= 0); 125 126 if (pid == 0) { 127 128 if (setuid(pw->pw_uid) != 0) 129 _exit(EXIT_FAILURE); 130 131 if (mkdir(path, 0500) != 0) 132 _exit(EXIT_FAILURE); 133 134 _exit(EXIT_SUCCESS); 135 } 136 137 (void)sleep(1); 138 (void)wait(&sta); 139 140 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) 141 atf_tc_fail("failed to create '%s'", path); 142 143 ATF_REQUIRE(stat(path, &st_b) == 0); 144 ATF_REQUIRE(rmdir(path) == 0); 145 146 /* 147 * The directory's owner ID should be set to the 148 * effective UID, whereas the group ID should be 149 * set to that of the parent directory. 150 */ 151 if (st_b.st_uid != pw->pw_uid) 152 atf_tc_fail("invalid UID for '%s'", path); 153 154 if (st_b.st_gid != st_a.st_gid) 155 atf_tc_fail("GID did not follow the parent directory"); 156 } 157 158 ATF_TC_CLEANUP(mkdir_mode, tc) 159 { 160 (void)rmdir("/tmp/mkdir"); 161 } 162 163 ATF_TC(mkdir_trail); 164 ATF_TC_HEAD(mkdir_trail, tc) 165 { 166 atf_tc_set_md_var(tc, "descr", "Checks mkdir(2) for trailing slashes"); 167 } 168 169 ATF_TC_BODY(mkdir_trail, tc) 170 { 171 const char *tests[] = { 172 /* 173 * IEEE 1003.1 second ed. 2.2.2.78: 174 * 175 * If the pathname refers to a directory, it may also have 176 * one or more trailing slashes. Multiple successive slashes 177 * are considered to be the same as one slash. 178 */ 179 "dir1/", 180 "dir2//", 181 182 NULL, 183 }; 184 185 const char **test; 186 187 for (test = &tests[0]; *test != NULL; ++test) { 188 189 (void)printf("Checking \"%s\"\n", *test); 190 (void)rmdir(*test); 191 192 ATF_REQUIRE(mkdir(*test, 0777) == 0); 193 ATF_REQUIRE(rename(*test, "foo") == 0); 194 ATF_REQUIRE(rename("foo/", *test) == 0); 195 ATF_REQUIRE(rmdir(*test) == 0); 196 } 197 } 198 199 ATF_TP_ADD_TCS(tp) 200 { 201 202 ATF_TP_ADD_TC(tp, mkdir_err); 203 ATF_TP_ADD_TC(tp, mkdir_perm); 204 ATF_TP_ADD_TC(tp, mkdir_mode); 205 ATF_TP_ADD_TC(tp, mkdir_trail); 206 207 return atf_no_error(); 208 } 209