tests/lib/libc/sys/t_revoke.c

   1 /* $NetBSD: t_revoke.c,v 1.1 2011/07/07 06:57:54 jruoho 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_revoke.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $");
  33
  34 #include <sys/resource.h>
  35 #include <sys/wait.h>
  36
  37 #include <atf-c.h>
  38 #include <fcntl.h>
  39 #include <errno.h>
  40 #include <pwd.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45
  46 static const char path[] = "revoke";
  47
  48 ATF_TC_WITH_CLEANUP(revoke_basic);
  49 ATF_TC_HEAD(revoke_basic, tc)
  50 {
  51         atf_tc_set_md_var(tc, "descr", "A basic test of revoke(2)");
  52 }
  53
  54 ATF_TC_BODY(revoke_basic, tc)
  55 {
  56         struct rlimit res;
  57         char tmp[10];
  58         size_t i, n;
  59         int *buf;
  60
  61         (void)memset(&res, 0, sizeof(struct rlimit));
  62         (void)getrlimit(RLIMIT_NOFILE, &res);
  63
  64         if ((n = res.rlim_cur / 10) == 0)
  65                 n = 10;
  66
  67         buf = calloc(n, sizeof(int));
  68         ATF_REQUIRE(buf != NULL);
  69
  70         buf[0] = open(path, O_RDWR | O_CREAT, 0600);
  71         ATF_REQUIRE(buf[0] >= 0);
  72
  73         for (i = 1; i < n; i++) {
  74                 buf[i] = open(path, O_RDWR);
  75                 ATF_REQUIRE(buf[i] >= 0);
  76         }
  77
  78         ATF_REQUIRE(revoke(path) == 0);
  79
  80         for (i = 0; i < n; i++) {
  81
  82                 ATF_REQUIRE(read(buf[i], tmp, sizeof(tmp)) == -1);
  83
  84                 (void)close(buf[i]);
  85         }
  86
  87         free(buf);
  88
  89         (void)unlink(path);
  90 }
  91
  92 ATF_TC_CLEANUP(revoke_basic, tc)
  93 {
  94         (void)unlink(path);
  95 }
  96
  97 ATF_TC(revoke_err);
  98 ATF_TC_HEAD(revoke_err, tc)
  99 {
 100         atf_tc_set_md_var(tc, "descr", "Test errors from revoke(2)");
 101         atf_tc_set_md_var(tc, "require.user", "unprivileged");
 102 }
 103
 104 ATF_TC_BODY(revoke_err, tc)
 105 {
 106         char buf[1024 + 1];     /* XXX: From the manual page... */
 107
 108         (void)memset(buf, 'x', sizeof(buf));
 109
 110         errno = 0;
 111         ATF_REQUIRE_ERRNO(EFAULT, revoke((char *)-1) == -1);
 112
 113         errno = 0;
 114         ATF_REQUIRE_ERRNO(ENAMETOOLONG, revoke(buf) == -1);
 115
 116         errno = 0;
 117         ATF_REQUIRE_ERRNO(EPERM, revoke("/etc/passwd") == -1);
 118
 119         errno = 0;
 120         ATF_REQUIRE_ERRNO(ENOENT, revoke("/etc/xxx/yyy") == -1);
 121 }
 122
 123 ATF_TC_WITH_CLEANUP(revoke_perm);
 124 ATF_TC_HEAD(revoke_perm, tc)
 125 {
 126         atf_tc_set_md_var(tc, "descr", "Test permissions revoke(2)");
 127         atf_tc_set_md_var(tc, "require.user", "root");
 128 }
 129
 130 ATF_TC_BODY(revoke_perm, tc)
 131 {
 132         struct passwd *pw;
 133         int fd, sta;
 134         pid_t pid;
 135
 136         pw = getpwnam("nobody");
 137         fd = open(path, O_RDWR | O_CREAT, 0600);
 138
 139         ATF_REQUIRE(fd >= 0);
 140         ATF_REQUIRE(pw != NULL);
 141         ATF_REQUIRE(revoke(path) == 0);
 142
 143         pid = fork();
 144         ATF_REQUIRE(pid >= 0);
 145
 146         if (pid == 0) {
 147
 148                 if (setuid(pw->pw_uid) != 0)
 149                         _exit(EXIT_FAILURE);
 150
 151                 errno = 0;
 152
 153                 if (revoke(path) == 0)
 154                         _exit(EXIT_FAILURE);
 155
 156                 if (errno != EACCES)
 157                         _exit(EXIT_FAILURE);
 158
 159                 if (close(fd) != 0)
 160                         _exit(EXIT_FAILURE);
 161
 162                 _exit(EXIT_SUCCESS);
 163         }
 164
 165         (void)wait(&sta);
 166
 167         if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
 168                 atf_tc_fail("revoke(2) did not obey permissions");
 169
 170         ATF_REQUIRE(unlink(path) == 0);
 171 }
 172
 173 ATF_TC_CLEANUP(revoke_perm, tc)
 174 {
 175         (void)unlink(path);
 176 }
 177
 178 ATF_TP_ADD_TCS(tp)
 179 {
 180
 181         ATF_TP_ADD_TC(tp, revoke_basic);
 182         ATF_TP_ADD_TC(tp, revoke_err);
 183         ATF_TP_ADD_TC(tp, revoke_perm);
 184
 185         return atf_no_error();
 186 }