1 /* $NetBSD: t_linkat.c,v 1.2 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_linkat.c,v 1.2 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 #include <sys/stat.h>
44
45 #define ODIR "olddir"
46 #define NDIR "newdir"
47 #define FILE "olddir/old"
48 #define BASEFILE "old"
49 #define RELFILE "../olddir/old"
50 #define TARGET "newdir/new"
51 #define BASETARGET "new"
52 #define LINK "olddir/symlink"
53 #define BASELINK "symlink"
54 #define FILEERR "olddir/olderr"
55
56 ATF_TC(linkat_fd);
ATF_TC_HEAD(linkat_fd,tc)57 ATF_TC_HEAD(linkat_fd, tc)
58 {
59 atf_tc_set_md_var(tc, "descr", "See that linkat works with fd");
60 }
ATF_TC_BODY(linkat_fd,tc)61 ATF_TC_BODY(linkat_fd, tc)
62 {
63 int ofd, nfd, fd;
64 struct stat ost, nst;
65
66 ATF_REQUIRE(mkdir(ODIR, 0755) == 0);
67 ATF_REQUIRE(mkdir(NDIR, 0755) == 0);
68 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
69 ATF_REQUIRE(close(fd) != -1);
70
71 ATF_REQUIRE((ofd = open(ODIR, O_RDONLY, 0)) != -1);
72 ATF_REQUIRE((nfd = open(NDIR, O_RDONLY, 0)) != -1);
73 ATF_REQUIRE(linkat(ofd, BASEFILE, nfd, BASETARGET, 0) == 0);
74 ATF_REQUIRE(close(ofd) == 0);
75 ATF_REQUIRE(close(nfd) == 0);
76
77 ATF_REQUIRE(stat(FILE, &ost) == 0);
78 ATF_REQUIRE(stat(TARGET, &nst) == 0);
79 ATF_REQUIRE(ost.st_ino == nst.st_ino);
80 }
81
82 ATF_TC(linkat_fdcwd);
ATF_TC_HEAD(linkat_fdcwd,tc)83 ATF_TC_HEAD(linkat_fdcwd, tc)
84 {
85 atf_tc_set_md_var(tc, "descr",
86 "See that linkat works with fd as AT_FDCWD");
87 }
ATF_TC_BODY(linkat_fdcwd,tc)88 ATF_TC_BODY(linkat_fdcwd, tc)
89 {
90 int fd;
91 struct stat ost, nst;
92
93 ATF_REQUIRE(mkdir(ODIR, 0755) == 0);
94 ATF_REQUIRE(mkdir(NDIR, 0755) == 0);
95 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
96 ATF_REQUIRE(close(fd) != -1);
97
98 ATF_REQUIRE(linkat(AT_FDCWD, FILE, AT_FDCWD, TARGET, 0) == 0);
99
100 ATF_REQUIRE(stat(FILE, &ost) == 0);
101 ATF_REQUIRE(stat(TARGET, &nst) == 0);
102 ATF_REQUIRE(ost.st_ino == nst.st_ino);
103 }
104
105 ATF_TC(linkat_fdcwderr);
ATF_TC_HEAD(linkat_fdcwderr,tc)106 ATF_TC_HEAD(linkat_fdcwderr, tc)
107 {
108 atf_tc_set_md_var(tc, "descr",
109 "See that linkat fails with fd as AT_FDCWD and bad path");
110 }
ATF_TC_BODY(linkat_fdcwderr,tc)111 ATF_TC_BODY(linkat_fdcwderr, tc)
112 {
113 int fd;
114
115 ATF_REQUIRE(mkdir(ODIR, 0755) == 0);
116 ATF_REQUIRE(mkdir(NDIR, 0755) == 0);
117 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
118 ATF_REQUIRE(close(fd) != -1);
119
120 ATF_REQUIRE(linkat(AT_FDCWD, FILEERR, AT_FDCWD, TARGET, 0) == -1);
121 }
122
123 ATF_TC(linkat_fderr);
ATF_TC_HEAD(linkat_fderr,tc)124 ATF_TC_HEAD(linkat_fderr, tc)
125 {
126 atf_tc_set_md_var(tc, "descr", "See that linkat fails with fd as -1");
127 }
ATF_TC_BODY(linkat_fderr,tc)128 ATF_TC_BODY(linkat_fderr, tc)
129 {
130 int fd;
131
132 ATF_REQUIRE(mkdir(ODIR, 0755) == 0);
133 ATF_REQUIRE(mkdir(NDIR, 0755) == 0);
134 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
135 ATF_REQUIRE(close(fd) != -1);
136
137 ATF_REQUIRE(linkat(-1, FILE, AT_FDCWD, TARGET, 0) == -1);
138 ATF_REQUIRE(linkat(AT_FDCWD, FILE, -1, TARGET, 0) == -1);
139 ATF_REQUIRE(linkat(-1, FILE, -1, TARGET, 0) == -1);
140 }
141
142 ATF_TC(linkat_fdlink1);
ATF_TC_HEAD(linkat_fdlink1,tc)143 ATF_TC_HEAD(linkat_fdlink1, tc)
144 {
145 atf_tc_set_md_var(tc, "descr", "See that linkat works on symlink target");
146 }
ATF_TC_BODY(linkat_fdlink1,tc)147 ATF_TC_BODY(linkat_fdlink1, tc)
148 {
149 int ofd, nfd, fd;
150 struct stat ost, nst;
151
152 ATF_REQUIRE(mkdir(ODIR, 0755) == 0);
153 ATF_REQUIRE(mkdir(NDIR, 0755) == 0);
154 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
155 ATF_REQUIRE(close(fd) != -1);
156 ATF_REQUIRE(symlink(RELFILE, LINK) == 0);
157
158 ATF_REQUIRE((ofd = open(ODIR, O_RDONLY, 0)) != -1);
159 ATF_REQUIRE((nfd = open(NDIR, O_RDONLY, 0)) != -1);
160 ATF_REQUIRE(linkat(ofd, BASELINK, nfd, BASETARGET,
161 AT_SYMLINK_FOLLOW) == 0);
162 ATF_REQUIRE(close(ofd) == 0);
163 ATF_REQUIRE(close(nfd) == 0);
164
165 ATF_REQUIRE(lstat(LINK, &ost) == 0);
166 ATF_REQUIRE(lstat(TARGET, &nst) == 0);
167 ATF_REQUIRE(ost.st_ino != nst.st_ino);
168
169 ATF_REQUIRE(lstat(FILE, &ost) == 0);
170 ATF_REQUIRE(lstat(TARGET, &nst) == 0);
171 ATF_REQUIRE(ost.st_ino == nst.st_ino);
172 }
173
174
175 ATF_TC(linkat_fdlink2);
ATF_TC_HEAD(linkat_fdlink2,tc)176 ATF_TC_HEAD(linkat_fdlink2, tc)
177 {
178 atf_tc_set_md_var(tc, "descr", "See that linkat works on symlink source");
179 }
ATF_TC_BODY(linkat_fdlink2,tc)180 ATF_TC_BODY(linkat_fdlink2, tc)
181 {
182 int ofd, nfd, fd;
183 struct stat ost, nst;
184
185 ATF_REQUIRE(mkdir(ODIR, 0755) == 0);
186 ATF_REQUIRE(mkdir(NDIR, 0755) == 0);
187 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
188 ATF_REQUIRE(close(fd) != -1);
189 ATF_REQUIRE(symlink(RELFILE, LINK) == 0);
190
191 ATF_REQUIRE((ofd = open(ODIR, O_RDONLY, 0)) != -1);
192 ATF_REQUIRE((nfd = open(NDIR, O_RDONLY, 0)) != -1);
193 ATF_REQUIRE(linkat(ofd, BASELINK, nfd, BASETARGET, 0) == 0);
194 ATF_REQUIRE(close(ofd) == 0);
195 ATF_REQUIRE(close(nfd) == 0);
196
197 ATF_REQUIRE(lstat(LINK, &ost) == 0);
198 ATF_REQUIRE(lstat(TARGET, &nst) == 0);
199 ATF_REQUIRE(ost.st_ino == nst.st_ino);
200
201 ATF_REQUIRE(lstat(FILE, &ost) == 0);
202 ATF_REQUIRE(lstat(TARGET, &nst) == 0);
203 ATF_REQUIRE(ost.st_ino != nst.st_ino);
204 }
205
ATF_TP_ADD_TCS(tp)206 ATF_TP_ADD_TCS(tp)
207 {
208
209 ATF_TP_ADD_TC(tp, linkat_fd);
210 ATF_TP_ADD_TC(tp, linkat_fdcwd);
211 ATF_TP_ADD_TC(tp, linkat_fdcwderr);
212 ATF_TP_ADD_TC(tp, linkat_fderr);
213 ATF_TP_ADD_TC(tp, linkat_fdlink1);
214 ATF_TP_ADD_TC(tp, linkat_fdlink2);
215
216 return atf_no_error();
217 }
218