1#ifndef _XOPEN_SOURCE
2#define _XOPEN_SOURCE 700
3#endif
4#include <errno.h>
5#include <stdlib.h>
6#include <string.h>
7#include <time.h>
8#include <sys/types.h>
9#include <sys/msg.h>
10#include <sys/wait.h>
11#include <unistd.h>
12#include "test.h"
13
14static const char path[] = ".";
15static const int id = 'm';
16
17#define T(f) do{ \
18	if ((f)+1 == 0) \
19		t_error("%s failed: %s\n", #f, strerror(errno)); \
20}while(0)
21
22#define EQ(a,b,fmt) do{ \
23	if ((a) != (b)) \
24		t_error("%s == %s failed: " fmt "\n", #a, #b, a, b); \
25}while(0)
26
27static void snd()
28{
29	time_t t;
30	key_t k;
31	int qid;
32	struct msqid_ds qid_ds;
33	struct {
34		long type;
35		char data[20];
36	} msg = {1, "test message"};
37
38	T(t = time(0));
39	T(k = ftok(path, id));
40
41	/* make sure we get a clean message queue id */
42	T(qid = msgget(k, IPC_CREAT|0666));
43	T(msgctl(qid, IPC_RMID, 0));
44	T(qid = msgget(k, IPC_CREAT|IPC_EXCL|0666));
45
46	if (t_status)
47		exit(t_status);
48
49	/* check IPC_EXCL */
50	errno = 0;
51	if (msgget(k, IPC_CREAT|IPC_EXCL|0666) != -1 || errno != EEXIST)
52		t_error("msgget(IPC_CREAT|IPC_EXCL) should have failed with EEXIST, got %s\n", strerror(errno));
53
54	/* check if msgget initilaized the msqid_ds structure correctly */
55	T(msgctl(qid, IPC_STAT, &qid_ds));
56	EQ(qid_ds.msg_perm.cuid, geteuid(), "got %d, want %d");
57	EQ(qid_ds.msg_perm.uid, geteuid(), "got %d, want %d");
58	EQ(qid_ds.msg_perm.cgid, getegid(), "got %d, want %d");
59	EQ(qid_ds.msg_perm.gid, getegid(), "got %d, want %d");
60	EQ(qid_ds.msg_perm.mode & 0x1ff, 0666, "got %o, want %o");
61	EQ(qid_ds.msg_qnum, 0, "got %d, want %d");
62	EQ(qid_ds.msg_lspid, 0, "got %d, want %d");
63	EQ(qid_ds.msg_lrpid, 0, "got %d, want %d");
64	EQ((long long)qid_ds.msg_stime, 0, "got %lld, want %d");
65	EQ((long long)qid_ds.msg_rtime, 0, "got %lld, want %d");
66	if (qid_ds.msg_ctime < t)
67		t_error("qid_ds.msg_ctime >= t failed: got %lld, want >= %lld\n", (long long)qid_ds.msg_ctime, (long long)t);
68	if (qid_ds.msg_ctime > t+5)
69		t_error("qid_ds.msg_ctime <= t+5 failed: got %lld, want <= %lld\n", (long long)qid_ds.msg_ctime, (long long)t+5);
70	if (qid_ds.msg_qbytes <= 0)
71		t_error("qid_ds.msg_qbytes > 0 failed: got %d, want > 0\n", qid_ds.msg_qbytes, t);
72
73	/* test send */
74	T(msgsnd(qid, &msg, sizeof msg.data, IPC_NOWAIT));
75	T(msgctl(qid, IPC_STAT, &qid_ds));
76	EQ(qid_ds.msg_qnum, 1, "got %d, want %d");
77	EQ(qid_ds.msg_lspid, getpid(), "got %d, want %d");
78	if (qid_ds.msg_stime < t)
79		t_error("msg_stime is %lld want >= %lld\n", (long long)qid_ds.msg_stime, (long long)t);
80	if (qid_ds.msg_stime > t+5)
81		t_error("msg_stime is %lld want <= %lld\n", (long long)qid_ds.msg_stime, (long long)t+5);
82}
83
84static void rcv()
85{
86	key_t k;
87	int qid;
88	struct {
89		long type;
90		char data[20];
91	} msg;
92	long msgtyp = 0;
93
94	T(k = ftok(path, id));
95	T(qid = msgget(k, 0));
96
97	errno = 0;
98	if (msgrcv(qid, &msg, 0, msgtyp, 0) != -1 || errno != E2BIG)
99		t_error("msgrcv should have failed when msgsize==0 with E2BIG, got %s\n", strerror(errno));
100
101	/* test receive */
102	T(msgrcv(qid, &msg, sizeof msg.data, msgtyp, IPC_NOWAIT));
103	if (strcmp(msg.data,"test message") != 0)
104		t_error("received \"%s\" instead of \"%s\"\n", msg.data, "test message");
105
106	errno = 0;
107	if (msgrcv(qid, &msg, sizeof msg.data, msgtyp, MSG_NOERROR|IPC_NOWAIT) != -1 || errno != ENOMSG)
108		t_error("msgrcv should have failed when ther is no msg with ENOMSG, got %s\n", strerror(errno));
109
110	/* cleanup */
111	T(msgctl(qid, IPC_RMID, 0));
112}
113
114int main(void)
115{
116	int p;
117	int status;
118
119	snd();
120	p = fork();
121	if (p == -1)
122		t_error("fork failed: %s\n", strerror(errno));
123	else if (p == 0)
124		rcv();
125	else {
126		T(waitpid(p, &status, 0));
127		if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
128			t_error("child exit status: %d\n", status);
129	}
130	return t_status;
131}
132