1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 */
5
6 /*
7 * access(2) test for errno(s) EFAULT as root and nobody respectively.
8 */
9
10 #include <errno.h>
11 #include <unistd.h>
12 #include <sys/types.h>
13 #include <pwd.h>
14 #include "tst_test.h"
15
16 static uid_t uid;
17
18 static struct tcase {
19 void *addr;
20 int mode;
21 char *name;
22 } tcases[] = {
23 {(void *)-1, F_OK, "F_OK"},
24 {(void *)-1, R_OK, "R_OK"},
25 {(void *)-1, W_OK, "W_OK"},
26 {(void *)-1, X_OK, "X_OK"},
27 };
28
access_test(struct tcase * tc,const char * user)29 static void access_test(struct tcase *tc, const char *user)
30 {
31 TEST(access(tc->addr, tc->mode));
32
33 if (TST_RET != -1) {
34 tst_res(TFAIL, "access(%p, %s) as %s succeeded unexpectedly",
35 tc->addr, tc->name, user);
36 return;
37 }
38
39 if (TST_ERR != EFAULT) {
40 tst_res(TFAIL | TTERRNO,
41 "access(%p, %s) as %s should fail with EFAULT",
42 tc->addr, tc->name, user);
43 return;
44 }
45
46 tst_res(TPASS | TTERRNO, "access(%p, %s) as %s",
47 tc->addr, tc->name, user);
48 }
49
verify_access(unsigned int n)50 static void verify_access(unsigned int n)
51 {
52 struct tcase *tc = &tcases[n];
53 pid_t pid;
54
55 /* test as root */
56 access_test(tc, "root");
57
58 /* test as nobody */
59 pid = SAFE_FORK();
60 if (pid) {
61 SAFE_WAITPID(pid, NULL, 0);
62 } else {
63 SAFE_SETUID(uid);
64 access_test(tc, "nobody");
65 }
66 }
67
setup(void)68 static void setup(void)
69 {
70 struct passwd *pw;
71
72 pw = SAFE_GETPWNAM("nobody");
73
74 uid = pw->pw_uid;
75 }
76
77 static struct tst_test test = {
78 .tcnt = ARRAY_SIZE(tcases),
79 .needs_root = 1,
80 .forks_child = 1,
81 .setup = setup,
82 .test = verify_access,
83 };
84