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1#include <stdlib.h>
2#include <stdio.h>
3#include <string.h>
4#include <errno.h>
5#include <linux/msg.h>
6#include <fcntl.h>
7
8#define MAX_MSG_SIZE 32
9
10struct msg1 {
11 int msize;
12 long mtype;
13 char mtext[MAX_MSG_SIZE];
14};
15
16#define TEST_STRING "Test sysv5 msg"
17#define MSG_TYPE 1
18
19#define ANOTHER_TEST_STRING "Yet another test sysv5 msg"
20#define ANOTHER_MSG_TYPE 26538
21
22struct msgque_data {
23 key_t key;
24 int msq_id;
25 int qbytes;
26 int qnum;
27 int mode;
28 struct msg1 *messages;
29};
30
31int restore_queue(struct msgque_data *msgque)
32{
33 int fd, ret, id, i;
34 char buf[32];
35
36 fd = open("/proc/sys/kernel/msg_next_id", O_WRONLY);
37 if (fd == -1) {
38 printf("Failed to open /proc/sys/kernel/msg_next_id\n");
39 return -errno;
40 }
41 sprintf(buf, "%d", msgque->msq_id);
42
43 ret = write(fd, buf, strlen(buf));
44 if (ret != strlen(buf)) {
45 printf("Failed to write to /proc/sys/kernel/msg_next_id\n");
46 return -errno;
47 }
48
49 id = msgget(msgque->key, msgque->mode | IPC_CREAT | IPC_EXCL);
50 if (id == -1) {
51 printf("Failed to create queue\n");
52 return -errno;
53 }
54
55 if (id != msgque->msq_id) {
56 printf("Restored queue has wrong id (%d instead of %d)\n",
57 id, msgque->msq_id);
58 ret = -EFAULT;
59 goto destroy;
60 }
61
62 for (i = 0; i < msgque->qnum; i++) {
63 if (msgsnd(msgque->msq_id, &msgque->messages[i].mtype,
64 msgque->messages[i].msize, IPC_NOWAIT) != 0) {
65 printf("msgsnd failed (%m)\n");
66 ret = -errno;
67 goto destroy;
68 };
69 }
70 return 0;
71
72destroy:
73 if (msgctl(id, IPC_RMID, 0))
74 printf("Failed to destroy queue: %d\n", -errno);
75 return ret;
76}
77
78int check_and_destroy_queue(struct msgque_data *msgque)
79{
80 struct msg1 message;
81 int cnt = 0, ret;
82
83 while (1) {
84 ret = msgrcv(msgque->msq_id, &message.mtype, MAX_MSG_SIZE,
85 0, IPC_NOWAIT);
86 if (ret < 0) {
87 if (errno == ENOMSG)
88 break;
89 printf("Failed to read IPC message: %m\n");
90 ret = -errno;
91 goto err;
92 }
93 if (ret != msgque->messages[cnt].msize) {
94 printf("Wrong message size: %d (expected %d)\n", ret,
95 msgque->messages[cnt].msize);
96 ret = -EINVAL;
97 goto err;
98 }
99 if (message.mtype != msgque->messages[cnt].mtype) {
100 printf("Wrong message type\n");
101 ret = -EINVAL;
102 goto err;
103 }
104 if (memcmp(message.mtext, msgque->messages[cnt].mtext, ret)) {
105 printf("Wrong message content\n");
106 ret = -EINVAL;
107 goto err;
108 }
109 cnt++;
110 }
111
112 if (cnt != msgque->qnum) {
113 printf("Wrong message number\n");
114 ret = -EINVAL;
115 goto err;
116 }
117
118 ret = 0;
119err:
120 if (msgctl(msgque->msq_id, IPC_RMID, 0)) {
121 printf("Failed to destroy queue: %d\n", -errno);
122 return -errno;
123 }
124 return ret;
125}
126
127int dump_queue(struct msgque_data *msgque)
128{
129 struct msqid64_ds ds;
130 int kern_id;
131 int i, ret;
132
133 for (kern_id = 0; kern_id < 256; kern_id++) {
134 ret = msgctl(kern_id, MSG_STAT, &ds);
135 if (ret < 0) {
136 if (errno == -EINVAL)
137 continue;
138 printf("Failed to get stats for IPC queue with id %d\n",
139 kern_id);
140 return -errno;
141 }
142
143 if (ret == msgque->msq_id)
144 break;
145 }
146
147 msgque->messages = malloc(sizeof(struct msg1) * ds.msg_qnum);
148 if (msgque->messages == NULL) {
149 printf("Failed to get stats for IPC queue\n");
150 return -ENOMEM;
151 }
152
153 msgque->qnum = ds.msg_qnum;
154 msgque->mode = ds.msg_perm.mode;
155 msgque->qbytes = ds.msg_qbytes;
156
157 for (i = 0; i < msgque->qnum; i++) {
158 ret = msgrcv(msgque->msq_id, &msgque->messages[i].mtype,
159 MAX_MSG_SIZE, i, IPC_NOWAIT | MSG_COPY);
160 if (ret < 0) {
161 printf("Failed to copy IPC message: %m (%d)\n", errno);
162 return -errno;
163 }
164 msgque->messages[i].msize = ret;
165 }
166 return 0;
167}
168
169int fill_msgque(struct msgque_data *msgque)
170{
171 struct msg1 msgbuf;
172
173 msgbuf.mtype = MSG_TYPE;
174 memcpy(msgbuf.mtext, TEST_STRING, sizeof(TEST_STRING));
175 if (msgsnd(msgque->msq_id, &msgbuf.mtype, sizeof(TEST_STRING),
176 IPC_NOWAIT) != 0) {
177 printf("First message send failed (%m)\n");
178 return -errno;
179 };
180
181 msgbuf.mtype = ANOTHER_MSG_TYPE;
182 memcpy(msgbuf.mtext, ANOTHER_TEST_STRING, sizeof(ANOTHER_TEST_STRING));
183 if (msgsnd(msgque->msq_id, &msgbuf.mtype, sizeof(ANOTHER_TEST_STRING),
184 IPC_NOWAIT) != 0) {
185 printf("Second message send failed (%m)\n");
186 return -errno;
187 };
188 return 0;
189}
190
191int main(int argc, char **argv)
192{
193 int msg, pid, err;
194 struct msgque_data msgque;
195
196 msgque.key = ftok(argv[0], 822155650);
197 if (msgque.key == -1) {
198 printf("Can't make key\n");
199 return -errno;
200 }
201
202 msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
203 if (msgque.msq_id == -1) {
204 err = -errno;
205 printf("Can't create queue\n");
206 goto err_out;
207 }
208
209 err = fill_msgque(&msgque);
210 if (err) {
211 printf("Failed to fill queue\n");
212 goto err_destroy;
213 }
214
215 err = dump_queue(&msgque);
216 if (err) {
217 printf("Failed to dump queue\n");
218 goto err_destroy;
219 }
220
221 err = check_and_destroy_queue(&msgque);
222 if (err) {
223 printf("Failed to check and destroy queue\n");
224 goto err_out;
225 }
226
227 err = restore_queue(&msgque);
228 if (err) {
229 printf("Failed to restore queue\n");
230 goto err_destroy;
231 }
232
233 err = check_and_destroy_queue(&msgque);
234 if (err) {
235 printf("Failed to test queue\n");
236 goto err_out;
237 }
238 return 0;
239
240err_destroy:
241 if (msgctl(msgque.msq_id, IPC_RMID, 0)) {
242 printf("Failed to destroy queue: %d\n", -errno);
243 return -errno;
244 }
245err_out:
246 return err;
247}
1#include <stdlib.h>
2#include <stdio.h>
3#include <string.h>
4#include <errno.h>
5#include <linux/msg.h>
6#include <fcntl.h>
7
8#include "../kselftest.h"
9
10#define MAX_MSG_SIZE 32
11
12struct msg1 {
13 int msize;
14 long mtype;
15 char mtext[MAX_MSG_SIZE];
16};
17
18#define TEST_STRING "Test sysv5 msg"
19#define MSG_TYPE 1
20
21#define ANOTHER_TEST_STRING "Yet another test sysv5 msg"
22#define ANOTHER_MSG_TYPE 26538
23
24struct msgque_data {
25 key_t key;
26 int msq_id;
27 int qbytes;
28 int qnum;
29 int mode;
30 struct msg1 *messages;
31};
32
33int restore_queue(struct msgque_data *msgque)
34{
35 int fd, ret, id, i;
36 char buf[32];
37
38 fd = open("/proc/sys/kernel/msg_next_id", O_WRONLY);
39 if (fd == -1) {
40 printf("Failed to open /proc/sys/kernel/msg_next_id\n");
41 return -errno;
42 }
43 sprintf(buf, "%d", msgque->msq_id);
44
45 ret = write(fd, buf, strlen(buf));
46 if (ret != strlen(buf)) {
47 printf("Failed to write to /proc/sys/kernel/msg_next_id\n");
48 return -errno;
49 }
50
51 id = msgget(msgque->key, msgque->mode | IPC_CREAT | IPC_EXCL);
52 if (id == -1) {
53 printf("Failed to create queue\n");
54 return -errno;
55 }
56
57 if (id != msgque->msq_id) {
58 printf("Restored queue has wrong id (%d instead of %d)\n",
59 id, msgque->msq_id);
60 ret = -EFAULT;
61 goto destroy;
62 }
63
64 for (i = 0; i < msgque->qnum; i++) {
65 if (msgsnd(msgque->msq_id, &msgque->messages[i].mtype,
66 msgque->messages[i].msize, IPC_NOWAIT) != 0) {
67 printf("msgsnd failed (%m)\n");
68 ret = -errno;
69 goto destroy;
70 };
71 }
72 return 0;
73
74destroy:
75 if (msgctl(id, IPC_RMID, 0))
76 printf("Failed to destroy queue: %d\n", -errno);
77 return ret;
78}
79
80int check_and_destroy_queue(struct msgque_data *msgque)
81{
82 struct msg1 message;
83 int cnt = 0, ret;
84
85 while (1) {
86 ret = msgrcv(msgque->msq_id, &message.mtype, MAX_MSG_SIZE,
87 0, IPC_NOWAIT);
88 if (ret < 0) {
89 if (errno == ENOMSG)
90 break;
91 printf("Failed to read IPC message: %m\n");
92 ret = -errno;
93 goto err;
94 }
95 if (ret != msgque->messages[cnt].msize) {
96 printf("Wrong message size: %d (expected %d)\n", ret,
97 msgque->messages[cnt].msize);
98 ret = -EINVAL;
99 goto err;
100 }
101 if (message.mtype != msgque->messages[cnt].mtype) {
102 printf("Wrong message type\n");
103 ret = -EINVAL;
104 goto err;
105 }
106 if (memcmp(message.mtext, msgque->messages[cnt].mtext, ret)) {
107 printf("Wrong message content\n");
108 ret = -EINVAL;
109 goto err;
110 }
111 cnt++;
112 }
113
114 if (cnt != msgque->qnum) {
115 printf("Wrong message number\n");
116 ret = -EINVAL;
117 goto err;
118 }
119
120 ret = 0;
121err:
122 if (msgctl(msgque->msq_id, IPC_RMID, 0)) {
123 printf("Failed to destroy queue: %d\n", -errno);
124 return -errno;
125 }
126 return ret;
127}
128
129int dump_queue(struct msgque_data *msgque)
130{
131 struct msqid64_ds ds;
132 int kern_id;
133 int i, ret;
134
135 for (kern_id = 0; kern_id < 256; kern_id++) {
136 ret = msgctl(kern_id, MSG_STAT, &ds);
137 if (ret < 0) {
138 if (errno == -EINVAL)
139 continue;
140 printf("Failed to get stats for IPC queue with id %d\n",
141 kern_id);
142 return -errno;
143 }
144
145 if (ret == msgque->msq_id)
146 break;
147 }
148
149 msgque->messages = malloc(sizeof(struct msg1) * ds.msg_qnum);
150 if (msgque->messages == NULL) {
151 printf("Failed to get stats for IPC queue\n");
152 return -ENOMEM;
153 }
154
155 msgque->qnum = ds.msg_qnum;
156 msgque->mode = ds.msg_perm.mode;
157 msgque->qbytes = ds.msg_qbytes;
158
159 for (i = 0; i < msgque->qnum; i++) {
160 ret = msgrcv(msgque->msq_id, &msgque->messages[i].mtype,
161 MAX_MSG_SIZE, i, IPC_NOWAIT | MSG_COPY);
162 if (ret < 0) {
163 printf("Failed to copy IPC message: %m (%d)\n", errno);
164 return -errno;
165 }
166 msgque->messages[i].msize = ret;
167 }
168 return 0;
169}
170
171int fill_msgque(struct msgque_data *msgque)
172{
173 struct msg1 msgbuf;
174
175 msgbuf.mtype = MSG_TYPE;
176 memcpy(msgbuf.mtext, TEST_STRING, sizeof(TEST_STRING));
177 if (msgsnd(msgque->msq_id, &msgbuf.mtype, sizeof(TEST_STRING),
178 IPC_NOWAIT) != 0) {
179 printf("First message send failed (%m)\n");
180 return -errno;
181 };
182
183 msgbuf.mtype = ANOTHER_MSG_TYPE;
184 memcpy(msgbuf.mtext, ANOTHER_TEST_STRING, sizeof(ANOTHER_TEST_STRING));
185 if (msgsnd(msgque->msq_id, &msgbuf.mtype, sizeof(ANOTHER_TEST_STRING),
186 IPC_NOWAIT) != 0) {
187 printf("Second message send failed (%m)\n");
188 return -errno;
189 };
190 return 0;
191}
192
193int main(int argc, char **argv)
194{
195 int msg, pid, err;
196 struct msgque_data msgque;
197
198 if (getuid() != 0) {
199 printf("Please run the test as root - Exiting.\n");
200 return ksft_exit_fail();
201 }
202
203 msgque.key = ftok(argv[0], 822155650);
204 if (msgque.key == -1) {
205 printf("Can't make key: %d\n", -errno);
206 return ksft_exit_fail();
207 }
208
209 msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
210 if (msgque.msq_id == -1) {
211 err = -errno;
212 printf("Can't create queue: %d\n", err);
213 goto err_out;
214 }
215
216 err = fill_msgque(&msgque);
217 if (err) {
218 printf("Failed to fill queue: %d\n", err);
219 goto err_destroy;
220 }
221
222 err = dump_queue(&msgque);
223 if (err) {
224 printf("Failed to dump queue: %d\n", err);
225 goto err_destroy;
226 }
227
228 err = check_and_destroy_queue(&msgque);
229 if (err) {
230 printf("Failed to check and destroy queue: %d\n", err);
231 goto err_out;
232 }
233
234 err = restore_queue(&msgque);
235 if (err) {
236 printf("Failed to restore queue: %d\n", err);
237 goto err_destroy;
238 }
239
240 err = check_and_destroy_queue(&msgque);
241 if (err) {
242 printf("Failed to test queue: %d\n", err);
243 goto err_out;
244 }
245 return ksft_exit_pass();
246
247err_destroy:
248 if (msgctl(msgque.msq_id, IPC_RMID, 0)) {
249 printf("Failed to destroy queue: %d\n", -errno);
250 return ksft_exit_fail();
251 }
252err_out:
253 return ksft_exit_fail();
254}