tests/lib/libc/sys/t_unlink.c

   1 /* $NetBSD: t_unlink.c,v 1.2 2014/04/21 18:05:17 martin 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 1.2 2014/04/21 18:05:17 martin 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         ATF_REQUIRE_ERRNO(EBUSY, unlink("/") == -1);
  89
  90         errno = 0;
  91         ATF_REQUIRE_ERRNO(ENAMETOOLONG, unlink(buf) == -1);
  92
  93         errno = 0;
  94         ATF_REQUIRE_ERRNO(ENOENT, unlink("/a/b/c/d/e/f/g/h/i/j/k/l/m") == -1);
  95 }
  96
  97 ATF_TC_CLEANUP(unlink_err, tc)
  98 {
  99         (void)unlink(path);
 100 }
 101
 102 ATF_TC_WITH_CLEANUP(unlink_fifo);
 103 ATF_TC_HEAD(unlink_fifo, tc)
 104 {
 105         atf_tc_set_md_var(tc, "descr", "Test unlink(2) for a FIFO");
 106 }
 107
 108 ATF_TC_BODY(unlink_fifo, tc)
 109 {
 110
 111         ATF_REQUIRE(mkfifo(path, 0666) == 0);
 112         ATF_REQUIRE(unlink(path) == 0);
 113
 114         errno = 0;
 115         ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
 116 }
 117
 118 ATF_TC_CLEANUP(unlink_fifo, tc)
 119 {
 120         (void)unlink(path);
 121 }
 122
 123 ATF_TC_WITH_CLEANUP(unlink_perm);
 124 ATF_TC_HEAD(unlink_perm, tc)
 125 {
 126         atf_tc_set_md_var(tc, "descr", "Test permissions with unlink(2)");
 127         atf_tc_set_md_var(tc, "require.user", "unprivileged");
 128 }
 129
 130 ATF_TC_BODY(unlink_perm, tc)
 131 {
 132         int rv;
 133
 134         errno = 0;
 135         rv = unlink("/etc");
 136         ATF_REQUIRE_MSG(rv == -1 && (errno == EACCES || errno == EPERM),
 137             "unlinking a directory did not fail with EPERM or EACCESS; "
 138             "unlink() returned %d, errno %d", rv, errno);
 139
 140         errno = 0;
 141         ATF_REQUIRE_ERRNO(EACCES, unlink("/root/.profile") == -1);
 142 }
 143
 144 ATF_TC_CLEANUP(unlink_perm, tc)
 145 {
 146         (void)unlink(path);
 147 }
 148
 149 ATF_TP_ADD_TCS(tp)
 150 {
 151
 152         ATF_TP_ADD_TC(tp, unlink_basic);
 153         ATF_TP_ADD_TC(tp, unlink_err);
 154         ATF_TP_ADD_TC(tp, unlink_fifo);
 155         ATF_TP_ADD_TC(tp, unlink_perm);
 156
 157         return atf_no_error();
 158 }