1 /* $NetBSD: t_readlinkat.c,v 1.4 2017/01/10 15:13:56 christos 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 1.4 2017/01/10 15:13:56 christos Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/stat.h> 36 #include <atf-c.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <limits.h> 40 #include <paths.h> 41 #include <stdio.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #define DIR "dir" 46 #define FILE "dir/readlinkat" 47 #define BASEFILE "readlinkat" 48 #define LINK "dir/symlink" 49 #define BASELINK "symlink" 50 #define FILEERR "dir/readlinkaterr" 51 52 ATF_TC(readlinkat_fd); 53 ATF_TC_HEAD(readlinkat_fd, tc) 54 { 55 atf_tc_set_md_var(tc, "descr", "See that readlinkat works with fd"); 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(readlinkat_fdcwd); 79 ATF_TC_HEAD(readlinkat_fdcwd, tc) 80 { 81 atf_tc_set_md_var(tc, "descr", 82 "See that readlinkat works with fd as AT_FDCWD"); 83 } 84 ATF_TC_BODY(readlinkat_fdcwd, tc) 85 { 86 int fd; 87 ssize_t len; 88 char buf[MAXPATHLEN]; 89 90 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 91 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 92 ATF_REQUIRE(close(fd) == 0); 93 ATF_REQUIRE(symlink(FILE, LINK) == 0); 94 95 len = readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)-1); 96 ATF_REQUIRE(len != -1); 97 buf[len] = 0; 98 99 ATF_REQUIRE(strcmp(buf, FILE) == 0); 100 } 101 102 ATF_TC(readlinkat_fdcwderr); 103 ATF_TC_HEAD(readlinkat_fdcwderr, tc) 104 { 105 atf_tc_set_md_var(tc, "descr", 106 "See that readlinkat fails with fd as AT_FDCWD and bad path"); 107 } 108 ATF_TC_BODY(readlinkat_fdcwderr, tc) 109 { 110 char buf[MAXPATHLEN]; 111 112 ATF_REQUIRE(readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)) == -1); 113 } 114 115 ATF_TC(readlinkat_fderr1); 116 ATF_TC_HEAD(readlinkat_fderr1, tc) 117 { 118 atf_tc_set_md_var(tc, "descr", "See that readlinkat fail with bad path"); 119 } 120 ATF_TC_BODY(readlinkat_fderr1, tc) 121 { 122 int dfd; 123 124 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 125 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 126 ATF_REQUIRE(readlinkat(dfd, FILEERR, F_OK, 0) == -1); 127 ATF_REQUIRE(close(dfd) == 0); 128 } 129 130 ATF_TC(readlinkat_fderr2); 131 ATF_TC_HEAD(readlinkat_fderr2, tc) 132 { 133 atf_tc_set_md_var(tc, "descr", "See that readlinkat fails with fd as -1"); 134 } 135 ATF_TC_BODY(readlinkat_fderr2, tc) 136 { 137 int fd; 138 char buf[MAXPATHLEN]; 139 140 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 141 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 142 ATF_REQUIRE(close(fd) == 0); 143 ATF_REQUIRE(symlink(FILE, LINK) == 0); 144 145 ATF_REQUIRE(readlinkat(-1, LINK, buf, sizeof(buf)) == -1); 146 } 147 148 ATF_TP_ADD_TCS(tp) 149 { 150 151 ATF_TP_ADD_TC(tp, readlinkat_fd); 152 ATF_TP_ADD_TC(tp, readlinkat_fdcwd); 153 ATF_TP_ADD_TC(tp, readlinkat_fdcwderr); 154 ATF_TP_ADD_TC(tp, readlinkat_fderr1); 155 ATF_TP_ADD_TC(tp, readlinkat_fderr2); 156 157 return atf_no_error(); 158 } 159