tests/lib/libc/c063/t_readlinkat.c

   1 /*      $NetBSD: t_readlinkat.c,v 1.3 2013/03/17 04:46:06 jmmv Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Emmanuel Dreyfus.
   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_readlinkat.c,v 1.3 2013/03/17 04:46:06 jmmv Exp $");
  33
  34 #include <atf-c.h>
  35 #include <errno.h>
  36 #include <fcntl.h>
  37 #include <limits.h>
  38 #include <paths.h>
  39 #include <stdio.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include <sys/param.h>
  43
  44 #define DIR "dir"
  45 #define FILE "dir/readlinkat"
  46 #define BASEFILE "readlinkat"
  47 #define LINK "dir/symlink"
  48 #define BASELINK "symlink"
  49 #define FILEERR "dir/readlinkaterr"
  50
  51 ATF_TC(readlinkat_fd);
  52 ATF_TC_HEAD(readlinkat_fd, tc)
  53 {
  54         atf_tc_set_md_var(tc, "descr", "See that readlinkat works with fd");
  55 }
  56 ATF_TC_BODY(readlinkat_fd, tc)
  57 {
  58         int dfd;
  59         int fd;
  60         ssize_t len;
  61         char buf[MAXPATHLEN];
  62
  63         ATF_REQUIRE(mkdir(DIR, 0755) == 0);
  64         ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
  65         ATF_REQUIRE(close(fd) == 0);
  66         ATF_REQUIRE(symlink(FILE, LINK) == 0);
  67
  68         ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
  69         len = readlinkat(dfd, BASELINK, buf, sizeof(buf)-1);
  70         ATF_REQUIRE(len != -1);
  71         buf[len] = 0;
  72         ATF_REQUIRE(close(dfd) == 0);
  73
  74         ATF_REQUIRE(strcmp(buf, FILE) == 0);
  75 }
  76
  77 ATF_TC(readlinkat_fdcwd);
  78 ATF_TC_HEAD(readlinkat_fdcwd, tc)
  79 {
  80         atf_tc_set_md_var(tc, "descr",
  81                           "See that readlinkat works with fd as AT_FDCWD");
  82 }
  83 ATF_TC_BODY(readlinkat_fdcwd, tc)
  84 {
  85         int fd;
  86         ssize_t len;
  87         char buf[MAXPATHLEN];
  88
  89         ATF_REQUIRE(mkdir(DIR, 0755) == 0);
  90         ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
  91         ATF_REQUIRE(close(fd) == 0);
  92         ATF_REQUIRE(symlink(FILE, LINK) == 0);
  93
  94         len = readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)-1);
  95         ATF_REQUIRE(len != -1);
  96         buf[len] = 0;
  97
  98         ATF_REQUIRE(strcmp(buf, FILE) == 0);
  99 }
 100
 101 ATF_TC(readlinkat_fdcwderr);
 102 ATF_TC_HEAD(readlinkat_fdcwderr, tc)
 103 {
 104         atf_tc_set_md_var(tc, "descr",
 105                   "See that readlinkat fails with fd as AT_FDCWD and bad path");
 106 }
 107 ATF_TC_BODY(readlinkat_fdcwderr, tc)
 108 {
 109         char buf[MAXPATHLEN];
 110
 111         ATF_REQUIRE(readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)) == -1);
 112 }
 113
 114 ATF_TC(readlinkat_fderr1);
 115 ATF_TC_HEAD(readlinkat_fderr1, tc)
 116 {
 117         atf_tc_set_md_var(tc, "descr", "See that readlinkat fail with bad path");
 118 }
 119 ATF_TC_BODY(readlinkat_fderr1, tc)
 120 {
 121         int dfd;
 122
 123         ATF_REQUIRE(mkdir(DIR, 0755) == 0);
 124         ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
 125         ATF_REQUIRE(readlinkat(dfd, FILEERR, F_OK, 0) == -1);
 126         ATF_REQUIRE(close(dfd) == 0);
 127 }
 128
 129 ATF_TC(readlinkat_fderr2);
 130 ATF_TC_HEAD(readlinkat_fderr2, tc)
 131 {
 132         atf_tc_set_md_var(tc, "descr", "See that readlinkat fails with fd as -1");
 133 }
 134 ATF_TC_BODY(readlinkat_fderr2, tc)
 135 {
 136         int fd;
 137         char buf[MAXPATHLEN];
 138
 139         ATF_REQUIRE(mkdir(DIR, 0755) == 0);
 140         ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
 141         ATF_REQUIRE(close(fd) == 0);
 142         ATF_REQUIRE(symlink(FILE, LINK) == 0);
 143
 144         ATF_REQUIRE(readlinkat(-1, LINK, buf, sizeof(buf)) == -1);
 145 }
 146
 147 ATF_TP_ADD_TCS(tp)
 148 {
 149
 150         ATF_TP_ADD_TC(tp, readlinkat_fd);
 151         ATF_TP_ADD_TC(tp, readlinkat_fdcwd);
 152         ATF_TP_ADD_TC(tp, readlinkat_fdcwderr);
 153         ATF_TP_ADD_TC(tp, readlinkat_fderr1);
 154         ATF_TP_ADD_TC(tp, readlinkat_fderr2);
 155
 156         return atf_no_error();
 157 }