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t_readlinkat.c revision 1.2.2.3 
      1 /*	$NetBSD: t_readlinkat.c,v 1.2.2.3 2014/05/22 11:42:20 yamt 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 1.2.2.3 2014/05/22 11:42:20 yamt 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 }
    158