xref: /PHP-7.3/ext/mysqli/tests/mysqli_fork.phpt (revision 37d27e66)
1--TEST--
2Forking a child and using the same connection.
3--SKIPIF--
4<?php
5require_once('skipif.inc');
6require_once('skipifemb.inc');
7require_once('skipifconnectfailure.inc');
8
9if (!function_exists('pcntl_fork'))
10	die("skip Process Control Functions not available");
11
12if (!function_exists('posix_getpid'))
13	die("skip POSIX functions not available");
14
15require_once('connect.inc');
16if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
17	die(sprintf("skip Cannot connect, [%d] %s", mysqli_connect_errno(), mysqli_connect_error()));
18
19if (!have_innodb($link))
20	die(sprintf("skip Needs InnoDB support, [%d] %s", $link->errno, $link->error));
21?>
22--FILE--
23<?php
24	require_once("table.inc");
25
26	$res = mysqli_query($link, "SELECT 'dumped by the parent' AS message");
27	$pid = pcntl_fork();
28	switch ($pid) {
29		case -1:
30			printf("[001] Cannot fork child");
31			break;
32
33		case 0:
34			/* child */
35			exit(0);
36			break;
37
38		default:
39			/* parent */
40			$status = null;
41			$wait_id = pcntl_waitpid($pid, $status);
42			if (pcntl_wifexited($status) && (0 != ($tmp = pcntl_wexitstatus($status)))) {
43				printf("Exit code: %s\n", (pcntl_wifexited($status)) ? pcntl_wexitstatus($status) : 'n/a');
44				printf("Signal: %s\n", (pcntl_wifsignaled($status)) ? pcntl_wtermsig($status) : 'n/a');
45				printf("Stopped: %d\n", (pcntl_wifstopped($status)) ? pcntl_wstopsig($status) : 'n/a');
46			}
47			var_dump(mysqli_fetch_assoc($res));
48			mysqli_free_result($res);
49			break;
50	}
51
52	if (@mysqli_query($link, "SELECT id FROM test WHERE id = 1"))
53		printf("[003] Expecting error and closed connection, child exit should have closed connection\n");
54	else if ((($errno = mysqli_errno($link)) == 0) || ('' == ($error = mysqli_error($link))))
55		printf("[004] Expecting error string and error code from MySQL, got errno = %s/%s, error = %s/%s\n",
56			gettype($errno), $errno, gettype($error), $error);
57
58	mysqli_close($link);
59	if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
60		printf("[005] Cannot connect to the server using host=%s, user=%s, passwd=***, dbname=%s, port=%s, socket=%s\n",
61			$host, $user, $db, $port, $socket);
62
63	/* non trivial tests require a message list for parent-child communication */
64	if (!mysqli_query($link, "DROP TABLE IF EXISTS messages"))
65		printf("[006] [%d] %s\n", mysqli_error($link), mysqli_errno($link));
66
67	if (!mysqli_query($link, "CREATE TABLE messages(
68		msg_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
69		msg_time TIMESTAMP,
70		pid INT NOT NULL,
71		sender ENUM('child', 'parent') NOT NULL,
72		msg TEXT) ENGINE = InnoDB"))
73		printf("[007] [%d] %s\n", mysqli_error($link), mysqli_errno($link));
74
75	mysqli_autocommit($link, false);
76	if (!$res = mysqli_query($link, "SELECT id, label FROM test ORDER BY id ASC LIMIT 3", MYSQLI_USE_RESULT))
77		printf("[008] [%d] %s\n", mysqli_error($link), mysqli_errno($link));
78
79	$pid = pcntl_fork();
80
81	switch ($pid) {
82		case -1:
83			printf("[009] Cannot fork child");
84			break;
85
86		case 0:
87			/* child */
88			if (!($plink = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket)) || !mysqli_autocommit($plink, true))
89				exit(mysqli_errno($plink));
90
91			$sql = sprintf("INSERT INTO messages(pid, sender, msg) VALUES (%d, 'child', '%%s')", posix_getpid());
92			if (!mysqli_query($plink, sprintf($sql, 'start')))
93				exit(mysqli_errno($plink));
94
95			$parent_sql = sprintf("SELECT msg_id, msg_time, msg FROM messages WHERE pid = %d  AND sender = 'parent' ORDER BY msg_id DESC LIMIT 1", posix_getppid());
96			$msg_id = 0;
97			while ($row = mysqli_fetch_assoc($res)) {
98				/* send row to parent */
99				ob_start();
100				var_dump($row);
101				$tmp = ob_get_contents();
102				ob_end_clean();
103				if (!mysqli_query($plink, sprintf($sql, $tmp)))
104					exit(mysqli_errno($plink));
105
106				/* let the parent reply... */
107				$start = time();
108				do {
109					usleep(100);
110					if (!$pres = mysqli_query($plink, $parent_sql))
111						continue;
112					$tmp = mysqli_fetch_assoc($pres);
113					mysqli_free_result($pres);
114					if ($tmp['msg_id'] == $msg_id)
115						/* no new message */
116						continue;
117					if ($tmp['msg'] == 'stop')
118						break 2;
119					$msg_id = $tmp['msg_id'];
120					break;
121				} while ((time() - $start) < 5);
122
123			}
124
125			if (!mysqli_query($plink, sprintf($sql, 'stop')) || !mysqli_commit($link))
126				exit(mysqli_errno($plink));
127			exit(0);
128			break;
129
130		default:
131			/* parent */
132			if (!$plink = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
133					printf("[010] Cannot connect to the server using host=%s, user=%s, passwd=***, dbname=%s, port=%s, socket=%s\n",
134					$host, $user, $db, $port, $socket);
135
136			$status = null;
137			$start = time();
138			$sql = sprintf("SELECT msg_id, msg_time, msg FROM messages WHERE pid = %d AND sender = 'child' ORDER BY msg_id DESC LIMIT 1", $pid);
139			$parent_sql = sprintf("INSERT INTO messages (pid, sender, msg) VALUES (%d, 'parent', '%%s')", posix_getpid());
140			$last_msg_id = 0;
141			$num_rows = 0;
142			do {
143				$wait_id = pcntl_waitpid($pid, $status, WNOHANG);
144				if ($pres = mysqli_query($plink, $sql)) {
145					$row = mysqli_fetch_assoc($pres);
146					if ($row['msg_id'] != $last_msg_id) {
147						$last_msg_id = $row['msg_id'];
148						switch ($row['msg']) {
149							case 'start':
150								break;
151							case 'stop':
152								break 2;
153							default:
154								/* client has started fetching rows */
155								$client_row = $row['msg'];
156
157								$num_rows++;
158								if ($num_rows > 3) {
159									printf("[011] Child has fetched more than three rows!\n");
160									var_dump($client_row);
161									if (!mysqli_query($plink, sprintf($parent_sql, 'stop'))) {
162										printf("[012] Parent cannot inform child\n", mysqli_errno($plink), mysqli_error($plink));
163									}
164									break 2;
165								}
166
167								if (!$parent_row = mysqli_fetch_assoc($res)) {
168									printf("[013] Parent cannot fetch row %d\n", $num_rows, mysqli_errno($link), mysqli_error($link));
169									if (!mysqli_query($plink, sprintf($parent_sql, 'stop'))) {
170										printf("[014] Parent cannot inform child\n", mysqli_errno($plink), mysqli_error($plink));
171									}
172									break 2;
173								}
174
175								ob_start();
176								var_dump($parent_row);
177								$parent_row = ob_get_contents();
178								ob_end_clean();
179
180								if ($parent_row != $client_row) {
181									printf("[015] Child indicates different results than parent.\n");
182									var_dump($child_row);
183									var_dump($parent_row);
184									if (!mysqli_query($plink, sprintf($parent_sql, 'stop'))) {
185										printf("[016] Parent cannot inform child\n", mysqli_errno($plink), mysqli_error($plink));
186									}
187									break 2;
188								}
189
190								if (!mysqli_query($plink, sprintf($parent_sql, 'continue'))) {
191									printf("[017] Parent cannot inform child to continue.\n", mysqli_errno($plink), mysqli_error($plink));
192								}
193								break;
194						}
195					}
196					mysqli_free_result($pres);
197				}
198				usleep(100);
199			} while (((time() - $start) < 5) && ($num_rows < 3));
200			mysqli_close($plink);
201			$wait_id = pcntl_waitpid($pid, $status);
202			if (pcntl_wifexited($status) && (0 != ($tmp = pcntl_wexitstatus($status)))) {
203				printf("Exit code: %s\n", (pcntl_wifexited($status)) ? pcntl_wexitstatus($status) : 'n/a');
204				printf("Signal: %s\n", (pcntl_wifsignaled($status)) ? pcntl_wtermsig($status) : 'n/a');
205				printf("Stopped: %d\n", (pcntl_wifstopped($status)) ? pcntl_wstopsig($status) : 'n/a');
206			}
207			break;
208	}
209	mysqli_free_result($res);
210	mysqli_close($link);
211
212	if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
213		printf("[018] Cannot connect to the server using host=%s, user=%s, passwd=***, dbname=%s, port=%s, socket=%s\n",
214			$host, $user, $db, $port, $socket);
215
216	if (!$res = mysqli_query($link, "SELECT sender, msg FROM messages ORDER BY msg_id ASC"))
217		printf("[019] [%d] %s\n", mysqli_errno($link), mysqli_error($link));
218
219	while ($row = mysqli_fetch_assoc($res))
220		printf("%10s %s\n", $row['sender'], substr($row['msg'], 0, 5));
221	mysqli_free_result($res);
222
223	print "done!";
224?>
225--CLEAN--
226<?php
227require_once("connect.inc");
228if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
229   printf("[c001] [%d] %s\n", mysqli_connect_errno(), mysqli_connect_error());
230
231if (!mysqli_query($link, "DROP TABLE IF EXISTS test"))
232	printf("[c002] Cannot drop table, [%d] %s\n", mysqli_errno($link), mysqli_error($link));
233
234if (!mysqli_query($link, "DROP TABLE IF EXISTS messages"))
235	printf("[c003] Cannot drop table, [%d] %s\n", mysqli_errno($link), mysqli_error($link));
236
237mysqli_close($link);
238?>
239--EXPECT--
240array(1) {
241  ["message"]=>
242  string(20) "dumped by the parent"
243}
244     child start
245     child array
246    parent conti
247     child array
248    parent conti
249     child array
250    parent conti
251     child stop
252done!
253