1 /* $NetBSD: t_revoke.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jukka Ruohonen. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_revoke.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $"); 33 34 #include <sys/resource.h> 35 #include <sys/wait.h> 36 37 #include <atf-c.h> 38 #include <fcntl.h> 39 #include <errno.h> 40 #include <pwd.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 static const char path[] = "revoke"; 47 48 ATF_TC_WITH_CLEANUP(revoke_basic); 49 ATF_TC_HEAD(revoke_basic, tc) 50 { 51 atf_tc_set_md_var(tc, "descr", "A basic test of revoke(2)"); 52 } 53 54 ATF_TC_BODY(revoke_basic, tc) 55 { 56 struct rlimit res; 57 char tmp[10]; 58 size_t i, n; 59 int *buf; 60 61 (void)memset(&res, 0, sizeof(struct rlimit)); 62 (void)getrlimit(RLIMIT_NOFILE, &res); 63 64 if ((n = res.rlim_cur / 10) == 0) 65 n = 10; 66 67 buf = calloc(n, sizeof(int)); 68 ATF_REQUIRE(buf != NULL); 69 70 buf[0] = open(path, O_RDWR | O_CREAT, 0600); 71 ATF_REQUIRE(buf[0] >= 0); 72 73 for (i = 1; i < n; i++) { 74 buf[i] = open(path, O_RDWR); 75 ATF_REQUIRE(buf[i] >= 0); 76 } 77 78 ATF_REQUIRE(revoke(path) == 0); 79 80 for (i = 0; i < n; i++) { 81 82 ATF_REQUIRE(read(buf[i], tmp, sizeof(tmp)) == -1); 83 84 (void)close(buf[i]); 85 } 86 87 free(buf); 88 89 (void)unlink(path); 90 } 91 92 ATF_TC_CLEANUP(revoke_basic, tc) 93 { 94 (void)unlink(path); 95 } 96 97 ATF_TC(revoke_err); 98 ATF_TC_HEAD(revoke_err, tc) 99 { 100 atf_tc_set_md_var(tc, "descr", "Test errors from revoke(2)"); 101 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 102 } 103 104 ATF_TC_BODY(revoke_err, tc) 105 { 106 char buf[1024 + 1]; /* XXX: From the manual page... */ 107 108 (void)memset(buf, 'x', sizeof(buf)); 109 110 errno = 0; 111 ATF_REQUIRE_ERRNO(EFAULT, revoke((char *)-1) == -1); 112 113 errno = 0; 114 ATF_REQUIRE_ERRNO(ENAMETOOLONG, revoke(buf) == -1); 115 116 errno = 0; 117 ATF_REQUIRE_ERRNO(EPERM, revoke("/etc/passwd") == -1); 118 119 errno = 0; 120 ATF_REQUIRE_ERRNO(ENOENT, revoke("/etc/xxx/yyy") == -1); 121 } 122 123 ATF_TC_WITH_CLEANUP(revoke_perm); 124 ATF_TC_HEAD(revoke_perm, tc) 125 { 126 atf_tc_set_md_var(tc, "descr", "Test permissions revoke(2)"); 127 atf_tc_set_md_var(tc, "require.user", "root"); 128 } 129 130 ATF_TC_BODY(revoke_perm, tc) 131 { 132 struct passwd *pw; 133 int fd, sta; 134 pid_t pid; 135 136 pw = getpwnam("nobody"); 137 fd = open(path, O_RDWR | O_CREAT, 0600); 138 139 ATF_REQUIRE(fd >= 0); 140 ATF_REQUIRE(pw != NULL); 141 ATF_REQUIRE(revoke(path) == 0); 142 143 pid = fork(); 144 ATF_REQUIRE(pid >= 0); 145 146 if (pid == 0) { 147 148 if (setuid(pw->pw_uid) != 0) 149 _exit(EXIT_FAILURE); 150 151 errno = 0; 152 153 if (revoke(path) == 0) 154 _exit(EXIT_FAILURE); 155 156 if (errno != EACCES) 157 _exit(EXIT_FAILURE); 158 159 if (close(fd) != 0) 160 _exit(EXIT_FAILURE); 161 162 _exit(EXIT_SUCCESS); 163 } 164 165 (void)wait(&sta); 166 167 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) 168 atf_tc_fail("revoke(2) did not obey permissions"); 169 170 ATF_REQUIRE(unlink(path) == 0); 171 } 172 173 ATF_TC_CLEANUP(revoke_perm, tc) 174 { 175 (void)unlink(path); 176 } 177 178 ATF_TP_ADD_TCS(tp) 179 { 180 181 ATF_TP_ADD_TC(tp, revoke_basic); 182 ATF_TP_ADD_TC(tp, revoke_err); 183 ATF_TP_ADD_TC(tp, revoke_perm); 184 185 return atf_no_error(); 186 } 187