1 /* $NetBSD: t_readlinkat.c,v 1.2 2012/11/22 20:17:48 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Emmanuel Dreyfus. 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_readlinkat.c,v 1.2 2012/11/22 20:17:48 martin Exp $"); 33 34 #include <atf-c.h> 35 #include <errno.h> 36 #include <fcntl.h> 37 #include <limits.h> 38 #include <paths.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <sys/param.h> 43 44 #define DIR "dir" 45 #define FILE "dir/readlinkat" 46 #define BASEFILE "readlinkat" 47 #define LINK "dir/symlink" 48 #define BASELINK "symlink" 49 #define FILEERR "dir/readlinkaterr" 50 51 ATF_TC_WITH_CLEANUP(readlinkat_fd); 52 ATF_TC_HEAD(readlinkat_fd, tc) 53 { 54 atf_tc_set_md_var(tc, "descr", "See that readlinkat works with fd"); 55 } 56 57 ATF_TC_BODY(readlinkat_fd, tc) 58 { 59 int dfd; 60 int fd; 61 ssize_t len; 62 char buf[MAXPATHLEN]; 63 64 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 65 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 66 ATF_REQUIRE(close(fd) == 0); 67 ATF_REQUIRE(symlink(FILE, LINK) == 0); 68 69 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 70 len = readlinkat(dfd, BASELINK, buf, sizeof(buf)-1); 71 ATF_REQUIRE(len != -1); 72 buf[len] = 0; 73 ATF_REQUIRE(close(dfd) == 0); 74 75 ATF_REQUIRE(strcmp(buf, FILE) == 0); 76 } 77 78 ATF_TC_CLEANUP(readlinkat_fd, tc) 79 { 80 (void)unlink(FILE); 81 (void)unlink(LINK); 82 (void)unlink(FILEERR); 83 (void)rmdir(DIR); 84 } 85 86 ATF_TC_WITH_CLEANUP(readlinkat_fdcwd); 87 ATF_TC_HEAD(readlinkat_fdcwd, tc) 88 { 89 atf_tc_set_md_var(tc, "descr", 90 "See that readlinkat works with fd as AT_FDCWD"); 91 } 92 93 ATF_TC_BODY(readlinkat_fdcwd, tc) 94 { 95 int fd; 96 ssize_t len; 97 char buf[MAXPATHLEN]; 98 99 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 100 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 101 ATF_REQUIRE(close(fd) == 0); 102 ATF_REQUIRE(symlink(FILE, LINK) == 0); 103 104 len = readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)-1); 105 ATF_REQUIRE(len != -1); 106 buf[len] = 0; 107 108 ATF_REQUIRE(strcmp(buf, FILE) == 0); 109 } 110 111 ATF_TC_CLEANUP(readlinkat_fdcwd, tc) 112 { 113 (void)unlink(FILE); 114 (void)unlink(LINK); 115 (void)unlink(FILEERR); 116 (void)rmdir(DIR); 117 } 118 119 ATF_TC_WITH_CLEANUP(readlinkat_fdcwderr); 120 ATF_TC_HEAD(readlinkat_fdcwderr, tc) 121 { 122 atf_tc_set_md_var(tc, "descr", 123 "See that readlinkat fails with fd as AT_FDCWD and bad path"); 124 } 125 126 ATF_TC_BODY(readlinkat_fdcwderr, tc) 127 { 128 char buf[MAXPATHLEN]; 129 130 ATF_REQUIRE(readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)) == -1); 131 } 132 133 ATF_TC_CLEANUP(readlinkat_fdcwderr, tc) 134 { 135 (void)unlink(FILE); 136 (void)unlink(LINK); 137 (void)unlink(FILEERR); 138 (void)rmdir(DIR); 139 } 140 141 ATF_TC_WITH_CLEANUP(readlinkat_fderr1); 142 ATF_TC_HEAD(readlinkat_fderr1, tc) 143 { 144 atf_tc_set_md_var(tc, "descr", "See that readlinkat fail with bad path"); 145 } 146 147 ATF_TC_BODY(readlinkat_fderr1, tc) 148 { 149 int dfd; 150 151 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 152 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 153 ATF_REQUIRE(readlinkat(dfd, FILEERR, F_OK, 0) == -1); 154 ATF_REQUIRE(close(dfd) == 0); 155 156 } 157 158 ATF_TC_CLEANUP(readlinkat_fderr1, tc) 159 { 160 (void)unlink(FILE); 161 (void)unlink(FILEERR); 162 (void)rmdir(DIR); 163 } 164 165 ATF_TC_WITH_CLEANUP(readlinkat_fderr2); 166 ATF_TC_HEAD(readlinkat_fderr2, tc) 167 { 168 atf_tc_set_md_var(tc, "descr", "See that readlinkat fails with fd as -1"); 169 } 170 171 ATF_TC_BODY(readlinkat_fderr2, tc) 172 { 173 int fd; 174 char buf[MAXPATHLEN]; 175 176 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 177 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 178 ATF_REQUIRE(close(fd) == 0); 179 ATF_REQUIRE(symlink(FILE, LINK) == 0); 180 181 ATF_REQUIRE(readlinkat(-1, LINK, buf, sizeof(buf)) == -1); 182 } 183 184 ATF_TC_CLEANUP(readlinkat_fderr2, tc) 185 { 186 (void)unlink(FILE); 187 (void)unlink(LINK); 188 (void)unlink(FILEERR); 189 (void)rmdir(DIR); 190 } 191 192 193 ATF_TP_ADD_TCS(tp) 194 { 195 196 ATF_TP_ADD_TC(tp, readlinkat_fd); 197 ATF_TP_ADD_TC(tp, readlinkat_fdcwd); 198 ATF_TP_ADD_TC(tp, readlinkat_fdcwderr); 199 ATF_TP_ADD_TC(tp, readlinkat_fderr1); 200 ATF_TP_ADD_TC(tp, readlinkat_fderr2); 201 202 return atf_no_error(); 203 } 204