tests/lib/libc/sys/t_mkdir.c

   1 /* $NetBSD: t_mkdir.c,v 1.2 2011/10/15 07:38:31 jruoho Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2008, 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe and 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
  32 #include <sys/cdefs.h>
  33 __COPYRIGHT("@(#) Copyright (c) 2008\
  34  The NetBSD Foundation, inc. All rights reserved.");
  35 __RCSID("$NetBSD: t_mkdir.c,v 1.2 2011/10/15 07:38:31 jruoho Exp $");
  36
  37 #include <sys/stat.h>
  38 #include <sys/wait.h>
  39
  40 #include <atf-c.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <limits.h>
  44 #include <pwd.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <unistd.h>
  49
  50 ATF_TC(mkdir_err);
  51 ATF_TC_HEAD(mkdir_err, tc)
  52 {
  53         atf_tc_set_md_var(tc, "descr", "Checks errors from mkdir(2)");
  54 }
  55
  56 ATF_TC_BODY(mkdir_err, tc)
  57 {
  58         char buf[PATH_MAX + 1];
  59         int fd;
  60
  61         (void)memset(buf, 'x', sizeof(buf));
  62
  63         fd = open("/etc", O_RDONLY);
  64
  65         if (fd >= 0) {
  66
  67                 (void)close(fd);
  68
  69                 errno = 0;
  70                 ATF_REQUIRE_ERRNO(EEXIST, mkdir("/etc", 0500) == -1);
  71         }
  72
  73         errno = 0;
  74         ATF_REQUIRE_ERRNO(EFAULT, mkdir((void *)-1, 0500) == -1);
  75
  76         errno = 0;
  77         ATF_REQUIRE_ERRNO(ENAMETOOLONG, mkdir(buf, 0500) == -1);
  78
  79         errno = 0;
  80         ATF_REQUIRE_ERRNO(ENOENT, mkdir("/a/b/c/d/e/f/g/h/i/j/k", 0500) == -1);
  81 }
  82
  83 ATF_TC_WITH_CLEANUP(mkdir_perm);
  84 ATF_TC_HEAD(mkdir_perm, tc)
  85 {
  86         atf_tc_set_md_var(tc, "descr", "Checks permissions with mkdir(2)");
  87         atf_tc_set_md_var(tc, "require.user", "unprivileged");
  88 }
  89
  90 ATF_TC_BODY(mkdir_perm, tc)
  91 {
  92         errno = 0;
  93         ATF_REQUIRE_ERRNO(EACCES, mkdir("/usr/__nonexistent__", 0500) == -1);
  94 }
  95
  96 ATF_TC_CLEANUP(mkdir_perm, tc)
  97 {
  98         (void)rmdir("/usr/__nonexistent__");
  99 }
 100
 101 ATF_TC_WITH_CLEANUP(mkdir_mode);
 102 ATF_TC_HEAD(mkdir_mode, tc)
 103 {
 104         atf_tc_set_md_var(tc, "descr", "Test that UIDs and GIDs are right "
 105             "for a directory created with mkdir(2)");
 106         atf_tc_set_md_var(tc, "require.user", "root");
 107 }
 108
 109 ATF_TC_BODY(mkdir_mode, tc)
 110 {
 111         static const char *path = "/tmp/mkdir";
 112         struct stat st_a, st_b;
 113         struct passwd *pw;
 114         pid_t pid;
 115         int sta;
 116
 117         (void)memset(&st_a, 0, sizeof(struct stat));
 118         (void)memset(&st_b, 0, sizeof(struct stat));
 119
 120         pw = getpwnam("nobody");
 121
 122         ATF_REQUIRE(pw != NULL);
 123         ATF_REQUIRE(stat("/tmp", &st_a) == 0);
 124
 125         pid = fork();
 126         ATF_REQUIRE(pid >= 0);
 127
 128         if (pid == 0) {
 129
 130                 if (setuid(pw->pw_uid) != 0)
 131                         _exit(EXIT_FAILURE);
 132
 133                 if (mkdir(path, 0500) != 0)
 134                         _exit(EXIT_FAILURE);
 135
 136                 _exit(EXIT_SUCCESS);
 137         }
 138
 139         (void)sleep(1);
 140         (void)wait(&sta);
 141
 142         if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
 143                 atf_tc_fail("failed to create '%s'", path);
 144
 145         ATF_REQUIRE(stat(path, &st_b) == 0);
 146         ATF_REQUIRE(rmdir(path) == 0);
 147
 148         /*
 149          * The directory's owner ID should be set to the
 150          * effective UID, whereas the group ID should be
 151          * set to that of the parent directory.
 152          */
 153         if (st_b.st_uid != pw->pw_uid)
 154                 atf_tc_fail("invalid UID for '%s'", path);
 155
 156         if (st_b.st_gid != st_a.st_gid)
 157                 atf_tc_fail("GID did not follow the parent directory");
 158 }
 159
 160 ATF_TC_CLEANUP(mkdir_mode, tc)
 161 {
 162         (void)rmdir("/tmp/mkdir");
 163 }
 164
 165 ATF_TC(mkdir_trail);
 166 ATF_TC_HEAD(mkdir_trail, tc)
 167 {
 168         atf_tc_set_md_var(tc, "descr", "Checks mkdir(2) for trailing slashes");
 169 }
 170
 171 ATF_TC_BODY(mkdir_trail, tc)
 172 {
 173         const char *tests[] = {
 174                 /*
 175                  * IEEE 1003.1 second ed. 2.2.2.78:
 176                  *
 177                  * If the pathname refers to a directory, it may also have
 178                  * one or more trailing slashes.  Multiple successive slashes
 179                  * are considered to be the same as one slash.
 180                  */
 181                 "dir1/",
 182                 "dir2//",
 183
 184                 NULL,
 185         };
 186
 187         const char **test;
 188
 189         for (test = &tests[0]; *test != NULL; ++test) {
 190
 191                 (void)printf("Checking \"%s\"\n", *test);
 192                 (void)rmdir(*test);
 193
 194                 ATF_REQUIRE(mkdir(*test, 0777) == 0);
 195                 ATF_REQUIRE(rename(*test, "foo") == 0);
 196                 ATF_REQUIRE(rename("foo/", *test) == 0);
 197                 ATF_REQUIRE(rmdir(*test) == 0);
 198         }
 199 }
 200
 201 ATF_TP_ADD_TCS(tp)
 202 {
 203
 204         ATF_TP_ADD_TC(tp, mkdir_err);
 205         ATF_TP_ADD_TC(tp, mkdir_perm);
 206         ATF_TP_ADD_TC(tp, mkdir_mode);
 207         ATF_TP_ADD_TC(tp, mkdir_trail);
 208
 209         return atf_no_error();
 210 }