1 /* $NetBSD: t_fchownat.c,v 1.4 2017/01/10 15:13:56 christos 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_fchownat.c,v 1.4 2017/01/10 15:13:56 christos Exp $");
33
34 #include <sys/param.h>
35 #include <sys/stat.h>
36 #include <atf-c.h>
37 #include <errno.h>
38 #include <fcntl.h>
39 #include <limits.h>
40 #include <paths.h>
41 #include <stdio.h>
42 #include <string.h>
43 #include <unistd.h>
44 #include <pwd.h>
45
46 #define DIR "dir"
47 #define FILE "dir/fchownat"
48 #define BASEFILE "fchownat"
49 #define LINK "dir/symlink"
50 #define BASELINK "symlink"
51 #define FILEERR "dir/fchownaterr"
52 #define USER "nobody"
53
54 static int getuser(uid_t *, gid_t *);
55
getuser(uid_t * uid,gid_t * gid)56 static int getuser(uid_t *uid, gid_t *gid)
57 {
58 struct passwd *pw;
59
60 if ((pw = getpwnam(USER)) == NULL)
61 return -1;
62
63 *uid = pw->pw_uid;
64 *gid = pw->pw_gid;
65
66 return 0;
67 }
68
69 ATF_TC(fchownat_fd);
ATF_TC_HEAD(fchownat_fd,tc)70 ATF_TC_HEAD(fchownat_fd, tc)
71 {
72 atf_tc_set_md_var(tc, "descr", "See that fchownat works with fd");
73 atf_tc_set_md_var(tc, "require.user", "root");
74 }
ATF_TC_BODY(fchownat_fd,tc)75 ATF_TC_BODY(fchownat_fd, tc)
76 {
77 int dfd;
78 int fd;
79 uid_t uid;
80 gid_t gid;
81 struct stat st;
82
83 ATF_REQUIRE(getuser(&uid, &gid) == 0);
84 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
85 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
86 ATF_REQUIRE(close(fd) == 0);
87
88 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
89 ATF_REQUIRE(fchownat(dfd, BASEFILE, uid, gid, 0) == 0);
90 ATF_REQUIRE(close(dfd) == 0);
91
92 ATF_REQUIRE(stat(FILE, &st) == 0);
93 ATF_REQUIRE(st.st_uid == uid);
94 ATF_REQUIRE(st.st_gid == gid);
95 }
96
97 ATF_TC(fchownat_fdcwd);
ATF_TC_HEAD(fchownat_fdcwd,tc)98 ATF_TC_HEAD(fchownat_fdcwd, tc)
99 {
100 atf_tc_set_md_var(tc, "descr",
101 "See that fchownat works with fd as AT_FDCWD");
102 atf_tc_set_md_var(tc, "require.user", "root");
103 }
ATF_TC_BODY(fchownat_fdcwd,tc)104 ATF_TC_BODY(fchownat_fdcwd, tc)
105 {
106 int fd;
107 uid_t uid;
108 gid_t gid;
109 struct stat st;
110
111 ATF_REQUIRE(getuser(&uid, &gid) == 0);
112 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
113 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
114 ATF_REQUIRE(close(fd) == 0);
115
116 ATF_REQUIRE(chdir(DIR) == 0);
117 ATF_REQUIRE(fchownat(AT_FDCWD, BASEFILE, uid, gid, 0) == 0);
118
119 ATF_REQUIRE(stat(BASEFILE, &st) == 0);
120 ATF_REQUIRE(st.st_uid == uid);
121 ATF_REQUIRE(st.st_gid == gid);
122 }
123
124 ATF_TC(fchownat_fdcwderr);
ATF_TC_HEAD(fchownat_fdcwderr,tc)125 ATF_TC_HEAD(fchownat_fdcwderr, tc)
126 {
127 atf_tc_set_md_var(tc, "descr",
128 "See that fchownat fails with fd as AT_FDCWD and bad path");
129 atf_tc_set_md_var(tc, "require.user", "root");
130 }
ATF_TC_BODY(fchownat_fdcwderr,tc)131 ATF_TC_BODY(fchownat_fdcwderr, tc)
132 {
133 uid_t uid;
134 gid_t gid;
135
136 ATF_REQUIRE(getuser(&uid, &gid) == 0);
137 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
138 ATF_REQUIRE(fchownat(AT_FDCWD, FILEERR, uid, gid, 0) == -1);
139 }
140
141 ATF_TC(fchownat_fderr1);
ATF_TC_HEAD(fchownat_fderr1,tc)142 ATF_TC_HEAD(fchownat_fderr1, tc)
143 {
144 atf_tc_set_md_var(tc, "descr", "See that fchownat fail with bad path");
145 atf_tc_set_md_var(tc, "require.user", "root");
146 }
ATF_TC_BODY(fchownat_fderr1,tc)147 ATF_TC_BODY(fchownat_fderr1, tc)
148 {
149 int dfd;
150 uid_t uid;
151 gid_t gid;
152
153 ATF_REQUIRE(getuser(&uid, &gid) == 0);
154 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
155 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
156 ATF_REQUIRE(fchownat(dfd, FILEERR, uid, gid, 0) == -1);
157 ATF_REQUIRE(close(dfd) == 0);
158 }
159
160 ATF_TC(fchownat_fderr2);
ATF_TC_HEAD(fchownat_fderr2,tc)161 ATF_TC_HEAD(fchownat_fderr2, tc)
162 {
163 atf_tc_set_md_var(tc, "descr", "See that fchownat fails with bad fdat");
164 atf_tc_set_md_var(tc, "require.user", "root");
165 }
ATF_TC_BODY(fchownat_fderr2,tc)166 ATF_TC_BODY(fchownat_fderr2, tc)
167 {
168 int dfd;
169 int fd;
170 char cwd[MAXPATHLEN];
171 uid_t uid;
172 gid_t gid;
173
174 ATF_REQUIRE(getuser(&uid, &gid) == 0);
175 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
176 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
177 ATF_REQUIRE(close(fd) == 0);
178
179 ATF_REQUIRE((dfd = open(getcwd(cwd, MAXPATHLEN), O_RDONLY, 0)) != -1);
180 ATF_REQUIRE(fchownat(dfd, BASEFILE, uid, gid, 0) == -1);
181 ATF_REQUIRE(close(dfd) == 0);
182 }
183
184 ATF_TC(fchownat_fderr3);
ATF_TC_HEAD(fchownat_fderr3,tc)185 ATF_TC_HEAD(fchownat_fderr3, tc)
186 {
187 atf_tc_set_md_var(tc, "descr", "See that fchownat fails with fd as -1");
188 atf_tc_set_md_var(tc, "require.user", "root");
189 }
ATF_TC_BODY(fchownat_fderr3,tc)190 ATF_TC_BODY(fchownat_fderr3, tc)
191 {
192 int fd;
193 uid_t uid;
194 gid_t gid;
195
196 ATF_REQUIRE(getuser(&uid, &gid) == 0);
197 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
198 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
199 ATF_REQUIRE(close(fd) == 0);
200
201 ATF_REQUIRE(fchownat(-1, FILE, uid, gid, 0) == -1);
202 }
203
204 ATF_TC(fchownat_fdlink);
ATF_TC_HEAD(fchownat_fdlink,tc)205 ATF_TC_HEAD(fchownat_fdlink, tc)
206 {
207 atf_tc_set_md_var(tc, "descr", "See that fchownat works on symlink");
208 atf_tc_set_md_var(tc, "require.user", "root");
209 }
ATF_TC_BODY(fchownat_fdlink,tc)210 ATF_TC_BODY(fchownat_fdlink, tc)
211 {
212 int dfd;
213 uid_t uid;
214 gid_t gid;
215 struct stat st;
216
217 ATF_REQUIRE(getuser(&uid, &gid) == 0);
218 ATF_REQUIRE(mkdir(DIR, 0755) == 0);
219 ATF_REQUIRE(symlink(FILE, LINK) == 0); /* Target does not exists */
220
221 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
222
223 ATF_REQUIRE(fchownat(dfd, BASELINK, uid, gid, 0) == -1);
224 ATF_REQUIRE(errno == ENOENT);
225
226 ATF_REQUIRE(fchownat(dfd, BASELINK, uid, gid,
227 AT_SYMLINK_NOFOLLOW) == 0);
228
229 ATF_REQUIRE(close(dfd) == 0);
230
231 ATF_REQUIRE(lstat(LINK, &st) == 0);
232 ATF_REQUIRE(st.st_uid == uid);
233 ATF_REQUIRE(st.st_gid == gid);
234 }
235
ATF_TP_ADD_TCS(tp)236 ATF_TP_ADD_TCS(tp)
237 {
238
239 ATF_TP_ADD_TC(tp, fchownat_fd);
240 ATF_TP_ADD_TC(tp, fchownat_fdcwd);
241 ATF_TP_ADD_TC(tp, fchownat_fdcwderr);
242 ATF_TP_ADD_TC(tp, fchownat_fderr1);
243 ATF_TP_ADD_TC(tp, fchownat_fderr2);
244 ATF_TP_ADD_TC(tp, fchownat_fderr3);
245 ATF_TP_ADD_TC(tp, fchownat_fdlink);
246
247 return atf_no_error();
248 }
249