1 /* $NetBSD: t_dir.c,v 1.10 2017/01/11 18:15:02 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/stat.h> 30 #include <assert.h> 31 #include <atf-c.h> 32 #include <dirent.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 42 43 ATF_TC(seekdir_basic); 44 ATF_TC_HEAD(seekdir_basic, tc) 45 { 46 47 atf_tc_set_md_var(tc, "descr", "Check telldir(3) and seekdir(3) " 48 "for correct behavior (PR lib/24324)"); 49 } 50 51 ATF_TC_BODY(seekdir_basic, tc) 52 { 53 DIR *dp; 54 char *wasname; 55 struct dirent *entry; 56 long here; 57 58 #define CREAT(x, m) do { \ 59 int _creat_fd; \ 60 ATF_REQUIRE_MSG((_creat_fd = creat((x), (m))) != -1, \ 61 "creat(%s, %x) failed: %s", (x), (m), \ 62 strerror(errno)); \ 63 (void)close(_creat_fd); \ 64 } while(0); 65 66 ATF_REQUIRE_MSG(mkdir("t", 0755) == 0, 67 "mkdir failed: %s", strerror(errno)); 68 CREAT("t/a", 0600); 69 CREAT("t/b", 0600); 70 CREAT("t/c", 0600); 71 72 dp = opendir("t"); 73 if ( dp == NULL) 74 atf_tc_fail("Could not open temp directory."); 75 76 /* skip two for . and .. */ 77 entry = readdir(dp); 78 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 79 ".", strerror(errno)); 80 81 entry = readdir(dp); 82 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 83 "..", strerror(errno)); 84 85 /* get first entry */ 86 entry = readdir(dp); 87 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 88 "first", strerror(errno)); 89 90 here = telldir(dp); 91 ATF_REQUIRE_MSG(here != -1, "telldir failed: %s", strerror(errno)); 92 93 /* get second entry */ 94 entry = readdir(dp); 95 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 96 "second", strerror(errno)); 97 98 wasname = strdup(entry->d_name); 99 if (wasname == NULL) 100 atf_tc_fail("cannot allocate memory"); 101 102 /* get third entry */ 103 entry = readdir(dp); 104 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 105 "third", strerror(errno)); 106 107 /* try to return to the position after the first entry */ 108 seekdir(dp, here); 109 entry = readdir(dp); 110 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 111 "first[1]", strerror(errno)); 112 if (strcmp(entry->d_name, wasname) != 0) 113 atf_tc_fail("1st seekdir found wrong name"); 114 115 /* try again, and throw in a telldir() for good measure */ 116 seekdir(dp, here); 117 here = telldir(dp); 118 entry = readdir(dp); 119 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 120 "second[1]", strerror(errno)); 121 if (strcmp(entry->d_name, wasname) != 0) 122 atf_tc_fail("2nd seekdir found wrong name"); 123 124 /* One more time, to make sure that telldir() doesn't affect result */ 125 seekdir(dp, here); 126 entry = readdir(dp); 127 ATF_REQUIRE_MSG(entry != NULL, "readdir[%s] failed: %s", 128 "third[1]", strerror(errno)); 129 130 if (strcmp(entry->d_name, wasname) != 0) 131 atf_tc_fail("3rd seekdir found wrong name"); 132 133 closedir(dp); 134 free(wasname); 135 } 136 137 /* There is no sbrk on AArch64 and RISC-V */ 138 #if !defined(__aarch64__) && !defined(__riscv__) 139 ATF_TC(telldir_leak); 140 ATF_TC_HEAD(telldir_leak, tc) 141 { 142 143 atf_tc_set_md_var(tc, "descr", 144 "Check telldir(3) for memory leakage (PR lib/24324)"); 145 } 146 147 ATF_TC_BODY(telldir_leak, tc) 148 { 149 DIR *dp; 150 char *memused; 151 int i; 152 int oktouse = 4096; 153 154 dp = opendir("."); 155 if (dp == NULL) 156 atf_tc_fail("Could not open current directory"); 157 158 (void)telldir(dp); 159 memused = sbrk(0); 160 closedir(dp); 161 162 for (i = 0; i < 1000; i++) { 163 dp = opendir("."); 164 if (dp == NULL) 165 atf_tc_fail("Could not open current directory"); 166 167 (void)telldir(dp); 168 closedir(dp); 169 170 if ((char *)sbrk(0) - memused > oktouse) { 171 (void)printf("Used %td extra bytes for %d telldir " 172 "calls", ((char *)sbrk(0) - memused), i); 173 oktouse = (char *)sbrk(0) - memused; 174 } 175 } 176 if (oktouse > 4096) { 177 atf_tc_fail("Failure: leaked %d bytes", oktouse); 178 } else { 179 (void)printf("OK: used %td bytes\n", (char *)(sbrk(0))-memused); 180 } 181 } 182 #endif 183 184 ATF_TP_ADD_TCS(tp) 185 { 186 187 ATF_TP_ADD_TC(tp, seekdir_basic); 188 #if !defined(__aarch64__) && !defined(__riscv__) 189 ATF_TP_ADD_TC(tp, telldir_leak); 190 #endif 191 192 return atf_no_error(); 193 } 194