1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * DESCRIPTION
22 * Testcase to check open(2) sets errno to EACCES correctly.
23 *
24 * ALGORITHM
25 * Create a file owned by root with no read permission for other users.
26 * Attempt to open it as ltpuser(1). The attempt should fail with EACCES.
27 * RESTRICTION
28 * Must run test as root.
29 */
30 #include <errno.h>
31 #include <pwd.h>
32 #include <fcntl.h>
33 #include <sys/stat.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36
37 #include "test.h"
38 #include "safe_macros.h"
39
40 char *TCID = "open05";
41 int TST_TOTAL = 1;
42
43 static char fname[20];
44 static int fd;
45
46 static uid_t nobody_uid;
47
48 static void cleanup(void);
49 static void setup(void);
50
main(int ac,char ** av)51 int main(int ac, char **av)
52 {
53 int lc;
54 int e_code, status, retval = 0;
55 pid_t pid;
56
57 tst_parse_opts(ac, av, NULL, NULL);
58
59 setup();
60
61 for (lc = 0; TEST_LOOPING(lc); lc++) {
62 /* reset tst_count in case we are looping */
63 tst_count = 0;
64
65 pid = FORK_OR_VFORK();
66 if (pid == -1)
67 tst_brkm(TBROK, cleanup, "fork() failed");
68
69 if (pid == 0) {
70 if (seteuid(nobody_uid) == -1) {
71 tst_resm(TWARN, "seteuid() failed, errno: %d",
72 errno);
73 }
74
75 TEST(open(fname, O_RDWR));
76
77 if (TEST_RETURN != -1) {
78 tst_resm(TFAIL, "open succeeded unexpectedly");
79 continue;
80 }
81
82 if (TEST_ERRNO != EACCES) {
83 retval = 1;
84 tst_resm(TFAIL, "Expected EACCES got %d",
85 TEST_ERRNO);
86 } else {
87 tst_resm(TPASS, "open returned expected "
88 "EACCES error");
89 }
90
91 /* set the id back to root */
92 if (seteuid(0) == -1)
93 tst_resm(TWARN, "seteuid(0) failed");
94
95 exit(retval);
96
97 } else {
98 /* wait for the child to finish */
99 wait(&status);
100 /* make sure the child returned a good exit status */
101 e_code = status >> 8;
102 if ((e_code != 0) || (retval != 0))
103 tst_resm(TFAIL, "Failures reported above");
104
105 close(fd);
106 cleanup();
107
108 }
109 }
110
111 tst_exit();
112 }
113
setup(void)114 static void setup(void)
115 {
116 struct passwd *pw;
117
118 tst_require_root();
119
120 pw = SAFE_GETPWNAM(NULL, "nobody");
121 nobody_uid = pw->pw_uid;
122
123 tst_sig(FORK, DEF_HANDLER, cleanup);
124
125 TEST_PAUSE;
126
127 /* make a temporary directory and cd to it */
128 tst_tmpdir();
129
130 sprintf(fname, "file.%d", getpid());
131
132 fd = SAFE_OPEN(cleanup, fname, O_RDWR | O_CREAT, 0700);
133 }
134
cleanup(void)135 static void cleanup(void)
136 {
137 unlink(fname);
138
139 /* delete the test directory created in setup() */
140 tst_rmdir();
141 }
142