1 /* $NetBSD: t_unlink.c,v 1.3 2017/01/13 19:33:03 christos 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_unlink.c,v 1.3 2017/01/13 19:33:03 christos Exp $"); 33 34 #include <sys/stat.h> 35 36 #include <atf-c.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <limits.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 static char path[] = "unlink"; 44 45 ATF_TC_WITH_CLEANUP(unlink_basic); 46 ATF_TC_HEAD(unlink_basic, tc) 47 { 48 atf_tc_set_md_var(tc, "descr", "A basic test of unlink(2)"); 49 } 50 51 ATF_TC_BODY(unlink_basic, tc) 52 { 53 const size_t n = 512; 54 size_t i; 55 int fd; 56 57 for (i = 0; i < n; i++) { 58 59 fd = open(path, O_RDWR | O_CREAT, 0666); 60 61 ATF_REQUIRE(fd != -1); 62 ATF_REQUIRE(close(fd) == 0); 63 ATF_REQUIRE(unlink(path) == 0); 64 65 errno = 0; 66 ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1); 67 } 68 } 69 70 ATF_TC_CLEANUP(unlink_basic, tc) 71 { 72 (void)unlink(path); 73 } 74 75 ATF_TC_WITH_CLEANUP(unlink_err); 76 ATF_TC_HEAD(unlink_err, tc) 77 { 78 atf_tc_set_md_var(tc, "descr", "Test error conditions of unlink(2)"); 79 } 80 81 ATF_TC_BODY(unlink_err, tc) 82 { 83 char buf[PATH_MAX + 1]; 84 85 (void)memset(buf, 'x', sizeof(buf)); 86 87 errno = 0; 88 #ifdef __FreeBSD__ 89 ATF_REQUIRE_ERRNO(EISDIR, unlink("/") == -1); 90 #else 91 ATF_REQUIRE_ERRNO(EBUSY, unlink("/") == -1); 92 #endif 93 94 errno = 0; 95 ATF_REQUIRE_ERRNO(ENAMETOOLONG, unlink(buf) == -1); 96 97 errno = 0; 98 ATF_REQUIRE_ERRNO(ENOENT, unlink("/a/b/c/d/e/f/g/h/i/j/k/l/m") == -1); 99 } 100 101 ATF_TC_CLEANUP(unlink_err, tc) 102 { 103 (void)unlink(path); 104 } 105 106 ATF_TC_WITH_CLEANUP(unlink_fifo); 107 ATF_TC_HEAD(unlink_fifo, tc) 108 { 109 atf_tc_set_md_var(tc, "descr", "Test unlink(2) for a FIFO"); 110 } 111 112 ATF_TC_BODY(unlink_fifo, tc) 113 { 114 int fd; 115 116 ATF_REQUIRE_MSG((fd = mkfifo(path, 0666)) == 0, 117 "mkfifo failed: %s", strerror(errno)); 118 (void)close(fd); 119 ATF_REQUIRE(unlink(path) == 0); 120 121 errno = 0; 122 ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1); 123 } 124 125 ATF_TC_CLEANUP(unlink_fifo, tc) 126 { 127 (void)unlink(path); 128 } 129 130 ATF_TC_WITH_CLEANUP(unlink_perm); 131 ATF_TC_HEAD(unlink_perm, tc) 132 { 133 atf_tc_set_md_var(tc, "descr", "Test permissions with unlink(2)"); 134 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 135 } 136 137 ATF_TC_BODY(unlink_perm, tc) 138 { 139 int rv; 140 141 errno = 0; 142 rv = unlink("/etc"); 143 ATF_REQUIRE_MSG(rv == -1 && (errno == EACCES || errno == EPERM), 144 "unlinking a directory did not fail with EPERM or EACCESS; " 145 "unlink() returned %d, errno %d", rv, errno); 146 147 errno = 0; 148 ATF_REQUIRE_ERRNO(EACCES, unlink("/root/.profile") == -1); 149 } 150 151 ATF_TC_CLEANUP(unlink_perm, tc) 152 { 153 (void)unlink(path); 154 } 155 156 ATF_TP_ADD_TCS(tp) 157 { 158 159 ATF_TP_ADD_TC(tp, unlink_basic); 160 ATF_TP_ADD_TC(tp, unlink_err); 161 ATF_TP_ADD_TC(tp, unlink_fifo); 162 ATF_TP_ADD_TC(tp, unlink_perm); 163 164 return atf_no_error(); 165 } 166