1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program.
16 */
17
18 /*
19 * DESCRIPTION
20 * 1) The calling process does not have write permission on the message
21 * queue, so msgsnd(2) fails and sets errno to EACCES.
22 * 2) msgsnd(2) fails and sets errno to EFAULT if the message buffer address
23 * is invalid.
24 * 3) msgsnd(2) fails and sets errno to EINVAL if the queue ID is invalid.
25 * 4) msgsnd(2) fails and sets errno to EINVAL if the message type is not
26 * positive (0).
27 * 5) msgsnd(2) fails and sets errno to EINVAL if the message type is not
28 * positive (>0).
29 * 6) msgsnd(2) fails and sets errno to EINVAL if the message size is less
30 * than zero.
31 */
32
33 #include <errno.h>
34 #include <string.h>
35 #include <stdlib.h>
36 #include <sys/types.h>
37 #include <sys/ipc.h>
38 #include <sys/msg.h>
39 #include <pwd.h>
40
41 #include "tst_test.h"
42 #include "tst_safe_sysv_ipc.h"
43 #include "libnewipc.h"
44
45 static key_t msgkey;
46 static int queue_id = -1;
47 static int bad_id = -1;
48 static struct passwd *pw;
49 static struct buf {
50 long type;
51 char text[MSGSIZE];
52 } snd_buf[] = {
53 {1, "hello"},
54 {0, "hello"},
55 {-1, "hello"}
56 };
57
58 static struct tcase {
59 int *id;
60 struct buf *buffer;
61 int msgsz;
62 int exp_err;
63 /*1: nobody expected 0: root expected */
64 int exp_user;
65 } tcases[] = {
66 {&queue_id, &snd_buf[0], MSGSIZE, EACCES, 1},
67 {&queue_id, NULL, MSGSIZE, EFAULT, 0},
68 {&bad_id, &snd_buf[0], MSGSIZE, EINVAL, 0},
69 {&queue_id, &snd_buf[1], MSGSIZE, EINVAL, 0},
70 {&queue_id, &snd_buf[2], MSGSIZE, EINVAL, 0},
71 {&queue_id, &snd_buf[0], -1, EINVAL, 0}
72 };
73
verify_msgsnd(struct tcase * tc)74 static void verify_msgsnd(struct tcase *tc)
75 {
76 TEST(msgsnd(*tc->id, tc->buffer, tc->msgsz, 0));
77 if (TEST_RETURN != -1) {
78 tst_res(TFAIL, "smgsnd() succeeded unexpectedly");
79 return;
80 }
81
82 if (TEST_ERRNO == tc->exp_err) {
83 tst_res(TPASS | TTERRNO, "msgsnd() failed as expected");
84 } else {
85 tst_res(TFAIL | TTERRNO, "msgsnd() failed unexpectedly,"
86 " expected %s", tst_strerrno(tc->exp_err));
87 }
88 }
89
do_test(unsigned int n)90 static void do_test(unsigned int n)
91 {
92 pid_t pid;
93 struct tcase *tc = &tcases[n];
94
95 if (tc->exp_user == 0) {
96 verify_msgsnd(tc);
97 return;
98 }
99
100 pid = SAFE_FORK();
101 if (pid) {
102 tst_reap_children();
103 } else {
104 SAFE_SETUID(pw->pw_uid);
105 verify_msgsnd(tc);
106 }
107 }
108
setup(void)109 static void setup(void)
110 {
111 msgkey = GETIPCKEY();
112
113 queue_id = SAFE_MSGGET(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW);
114
115 pw = SAFE_GETPWNAM("nobody");
116 }
117
cleanup(void)118 static void cleanup(void)
119 {
120 if (queue_id != -1)
121 SAFE_MSGCTL(queue_id, IPC_RMID, NULL);
122 }
123
124 static struct tst_test test = {
125 .tid = "msgsnd02",
126 .needs_tmpdir = 1,
127 .needs_root = 1,
128 .forks_child = 1,
129 .tcnt = ARRAY_SIZE(tcases),
130 .setup = setup,
131 .cleanup = cleanup,
132 .test = do_test
133 };
134