php-src/ext/sysvmsg/sysvmsg.c at PHP-4.4 · EndlessCoding/php-src · GitHub

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+----------------------------------------------------------------------+

| PHP version 4.0 |

+----------------------------------------------------------------------+

| This source file is subject to version 3.01 of the PHP license, |

| that is bundled with this package in the file LICENSE, and is |

| available through the world-wide-web at the following url: |

| http://www.php.net/license/3_01.txt |

| If you did not receive a copy of the PHP license and are unable to |

| obtain it through the world-wide-web, please send a note to |

| license@php.net so we can mail you a copy immediately. |

+----------------------------------------------------------------------+

| Authors: Wez Furlong <wez@thebrainroom.com |

+----------------------------------------------------------------------+

/* $Id$ */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "php.h"

#include "php_globals.h"

#include "php_ini.h"

#include "ext/standard/info.h"

#include "php_sysvmsg.h"

#include "ext/standard/php_var.h"

#include "ext/standard/php_smart_str.h"

/* In order to detect MSG_EXCEPT use at run time; we have no way

* of knowing what the bit definitions are, so we can't just define

* out own MSG_EXCEPT value. */

#define PHP_MSG_IPC_NOWAIT 1

#define PHP_MSG_NOERROR 2

#define PHP_MSG_EXCEPT 4

/* True global resources - no need for thread safety here */

static int le_sysvmsg;

static unsigned char sixth_arg_force_ref[] = { 6, BYREF_NONE, BYREF_NONE, BYREF_NONE, BYREF_NONE, BYREF_NONE, BYREF_FORCE };

static unsigned char msg_receive_args_force_ref[] = { 8, BYREF_NONE, BYREF_NONE, BYREF_FORCE,

BYREF_NONE, BYREF_FORCE, BYREF_NONE, BYREF_NONE, BYREF_FORCE };

/* {{{ sysvmsg_functions[]

* Every user visible function must have an entry in sysvmsg_functions[].

function_entry sysvmsg_functions[] = {

PHP_FE(msg_get_queue, NULL)

PHP_FE(msg_send, sixth_arg_force_ref)

PHP_FE(msg_receive, msg_receive_args_force_ref)

PHP_FE(msg_remove_queue, NULL)

PHP_FE(msg_stat_queue, NULL)

PHP_FE(msg_set_queue, NULL)

{NULL, NULL, NULL} /* Must be the last line in sysvmsg_functions[] */

};

/* }}} */

/* {{{ sysvmsg_module_entry

zend_module_entry sysvmsg_module_entry = {

STANDARD_MODULE_HEADER,

"sysvmsg",

sysvmsg_functions,

PHP_MINIT(sysvmsg),

PHP_MSHUTDOWN(sysvmsg),

NULL,

PHP_MINFO(sysvmsg),

NO_VERSION_YET,

STANDARD_MODULE_PROPERTIES

};

/* }}} */

#ifdef COMPILE_DL_SYSVMSG

ZEND_GET_MODULE(sysvmsg)

#endif

/* {{{ PHP_INI

/* Remove comments and fill if you need to have entries in php.ini

PHP_INI_BEGIN()

STD_PHP_INI_ENTRY("sysvmsg.value", "42", PHP_INI_ALL, OnUpdateInt, global_value, zend_sysvmsg_globals, sysvmsg_globals)

STD_PHP_INI_ENTRY("sysvmsg.string", "foobar", PHP_INI_ALL, OnUpdateString, global_string, zend_sysvmsg_globals, sysvmsg_globals)

PHP_INI_END()

/* }}} */

static void sysvmsg_release(zend_rsrc_list_entry *rsrc TSRMLS_DC)

{

sysvmsg_queue_t * mq = (sysvmsg_queue_t*)rsrc->ptr;

efree(mq);

}

/* {{{ PHP_MINIT_FUNCTION

PHP_MINIT_FUNCTION(sysvmsg)

{

le_sysvmsg = zend_register_list_destructors_ex(sysvmsg_release, NULL, "sysvmsg queue", module_number);

REGISTER_LONG_CONSTANT("MSG_IPC_NOWAIT", PHP_MSG_IPC_NOWAIT, CONST_PERSISTENT|CONST_CS);

REGISTER_LONG_CONSTANT("MSG_NOERROR", PHP_MSG_NOERROR, CONST_PERSISTENT|CONST_CS);

REGISTER_LONG_CONSTANT("MSG_EXCEPT", PHP_MSG_EXCEPT, CONST_PERSISTENT|CONST_CS);

return SUCCESS;

}

/* }}} */

/* {{{ PHP_MSHUTDOWN_FUNCTION

PHP_MSHUTDOWN_FUNCTION(sysvmsg)

{

return SUCCESS;

}

/* }}} */

/* {{{ PHP_MINFO_FUNCTION

PHP_MINFO_FUNCTION(sysvmsg)

{

php_info_print_table_start();

php_info_print_table_header(2, "sysvmsg support", "enabled");

php_info_print_table_row(2, "Revision", "$Revision$");

php_info_print_table_end();

}

/* }}} */

/* {{{ proto array msg_set_queue(resource queue, array data)

Set information for a message queue */

PHP_FUNCTION(msg_set_queue)

{

zval *queue, *data;

sysvmsg_queue_t *mq = NULL;

struct msqid_ds stat;

RETVAL_FALSE;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ra", &queue, &data) == FAILURE)

return;

ZEND_FETCH_RESOURCE(mq, sysvmsg_queue_t *, &queue, -1, "sysvmsg queue", le_sysvmsg);

if (msgctl(mq->id, IPC_STAT, &stat) == 0) {

zval **item;

/* now pull out members of data and set them in the stat buffer */

if (zend_hash_find(Z_ARRVAL_P(data), "msg_perm.uid",

sizeof("msg_perm.uid"), (void**)&item) == SUCCESS) {

convert_to_long_ex(item);

stat.msg_perm.uid = Z_LVAL_PP(item);

}

if (zend_hash_find(Z_ARRVAL_P(data), "msg_perm.gid",

sizeof("msg_perm.gid"), (void**)&item) == SUCCESS) {

convert_to_long_ex(item);

stat.msg_perm.gid = Z_LVAL_PP(item);

}

if (zend_hash_find(Z_ARRVAL_P(data), "msg_perm.mode",

sizeof("msg_perm.mode"), (void**)&item) == SUCCESS) {

convert_to_long_ex(item);

stat.msg_perm.mode = Z_LVAL_PP(item);

}

if (zend_hash_find(Z_ARRVAL_P(data), "msg_qbytes",

sizeof("msg_qbytes"), (void**)&item) == SUCCESS) {

convert_to_long_ex(item);

stat.msg_qbytes = Z_LVAL_PP(item);

}

if (msgctl(mq->id, IPC_SET, &stat) == 0) {

RETVAL_TRUE;

}

/* }}} */

/* {{{ proto array msg_stat_queue(resource queue)

Returns information about a message queue */

PHP_FUNCTION(msg_stat_queue)

{

zval *queue;

sysvmsg_queue_t *mq = NULL;

struct msqid_ds stat;

RETVAL_FALSE;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &queue) == FAILURE)

return;

ZEND_FETCH_RESOURCE(mq, sysvmsg_queue_t *, &queue, -1, "sysvmsg queue", le_sysvmsg);

if (msgctl(mq->id, IPC_STAT, &stat) == 0) {

array_init(return_value);

add_assoc_long(return_value, "msg_perm.uid", stat.msg_perm.uid);

add_assoc_long(return_value, "msg_perm.gid", stat.msg_perm.gid);

add_assoc_long(return_value, "msg_perm.mode", stat.msg_perm.mode);

add_assoc_long(return_value, "msg_stime", stat.msg_stime);

add_assoc_long(return_value, "msg_rtime", stat.msg_rtime);

add_assoc_long(return_value, "msg_ctime", stat.msg_ctime);

add_assoc_long(return_value, "msg_qnum", stat.msg_qnum);

add_assoc_long(return_value, "msg_qbytes", stat.msg_qbytes);

add_assoc_long(return_value, "msg_lspid", stat.msg_lspid);

add_assoc_long(return_value, "msg_lrpid", stat.msg_lrpid);

}

/* }}} */

/* {{{ proto resource msg_get_queue(long key [, long perms])

Attach to a message queue */

PHP_FUNCTION(msg_get_queue)

{

long key;

long perms = 0666;

sysvmsg_queue_t *mq;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|l", &key, &perms) == FAILURE) {

return;

}

mq = (sysvmsg_queue_t *)emalloc(sizeof(sysvmsg_queue_t));

mq->key = key;

mq->id = msgget(key, 0);

if (mq->id < 0) {

/* doesn't already exist; create it */

mq->id = msgget(key, IPC_CREAT|IPC_EXCL|perms);

if (mq->id < 0) {

zend_error(E_WARNING, "%s: msgget() failed for key 0x%lx: %s",

get_active_function_name(TSRMLS_C), key, strerror(errno));

efree(mq);

RETURN_FALSE;

}

RETVAL_RESOURCE(zend_list_insert(mq, le_sysvmsg));

}

/* }}} */

/* {{{ proto bool msg_remove_queue(resource queue)

Destroy the queue */

PHP_FUNCTION(msg_remove_queue)

{

zval *queue;

sysvmsg_queue_t *mq = NULL;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "r", &queue) == FAILURE)

return;

ZEND_FETCH_RESOURCE(mq, sysvmsg_queue_t *, &queue, -1, "sysvmsg queue", le_sysvmsg);

if (msgctl(mq->id, IPC_RMID, NULL) == 0) {

RETVAL_TRUE;

} else {

RETVAL_FALSE;

}

/* }}} */

/* {{{ proto mixed msg_receive(resource queue, long desiredmsgtype, long &msgtype, long maxsize, mixed message [[, bool unserialize=true][, long flags=0[, long errorcode]]])

Send a message of type msgtype (must be > 0) to a message queue */

PHP_FUNCTION(msg_receive)

{

zval *out_message, *queue, *out_msgtype, *zerrcode = NULL;

long desiredmsgtype, maxsize, flags = 0;

long realflags = 0;

zend_bool do_unserialize = 1;

sysvmsg_queue_t *mq = NULL;

struct php_msgbuf *messagebuffer = NULL; /* buffer to transmit */

int result;

RETVAL_FALSE;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rlzlz|blz",

&queue, &desiredmsgtype, &out_msgtype, &maxsize,

&out_message, &do_unserialize, &flags, &zerrcode) == FAILURE)

return;

if (maxsize <= 0) {

php_error_docref(NULL TSRMLS_CC, E_WARNING, "maximum size of the message has to be greater then zero");

return;

}

if (flags != 0) {

if (flags & PHP_MSG_EXCEPT) {

#ifndef MSG_EXCEPT

php_error_docref(NULL TSRMLS_CC, E_WARNING, "MSG_EXCEPT is not supported on your system");

RETURN_FALSE;

#else

realflags |= MSG_EXCEPT;

#endif

}

if (flags & PHP_MSG_NOERROR)

realflags |= MSG_NOERROR;

if (flags & PHP_MSG_IPC_NOWAIT)

realflags |= IPC_NOWAIT;

}

ZEND_FETCH_RESOURCE(mq, sysvmsg_queue_t *, &queue, -1, "sysvmsg queue", le_sysvmsg);

messagebuffer = (struct php_msgbuf*)safe_emalloc(maxsize, 1, sizeof(struct php_msgbuf));

result = msgrcv(mq->id, messagebuffer, maxsize, desiredmsgtype, realflags);

zval_dtor(out_msgtype);

zval_dtor(out_message);

ZVAL_LONG(out_msgtype, 0);

ZVAL_FALSE(out_message);

if (zerrcode) {

zval_dtor(zerrcode);

ZVAL_LONG(zerrcode, 0);

}

if (result >= 0) {

/* got it! */

ZVAL_LONG(out_msgtype, messagebuffer->mtype);

RETVAL_TRUE;

if (do_unserialize) {

php_unserialize_data_t var_hash;

zval *tmp = NULL;

const char *p = (const char*)messagebuffer->mtext;

MAKE_STD_ZVAL(tmp);

PHP_VAR_UNSERIALIZE_INIT(var_hash);

if (!php_var_unserialize(&tmp, &p, p + result, &var_hash TSRMLS_CC)) {

zend_error(E_WARNING, "%s(): message corrupted", get_active_function_name(TSRMLS_C));

RETVAL_FALSE;

} else {

REPLACE_ZVAL_VALUE(&out_message, tmp, 0);

}

FREE_ZVAL(tmp);

PHP_VAR_UNSERIALIZE_DESTROY(var_hash);

} else {

ZVAL_STRINGL(out_message, messagebuffer->mtext, result, 1);

}

} else if (zerrcode) {

ZVAL_LONG(zerrcode, errno);

}

efree(messagebuffer);

}

/* }}} */

/* {{{ proto bool msg_send(resource queue, long msgtype, mixed message [[, bool serialize=true][, bool blocking=true][, long errorcode]])

Send a message of type msgtype (must be > 0) to a message queue */

PHP_FUNCTION(msg_send)

{

zval *message, *queue, *zerror=NULL;

long msgtype;

zend_bool do_serialize = 1, blocking = 1;

sysvmsg_queue_t * mq = NULL;

struct php_msgbuf * messagebuffer = NULL; /* buffer to transmit */

int result;

int message_len = 0;

RETVAL_FALSE;

if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rlz|bbz",

&queue, &msgtype, &message, &do_serialize, &blocking, &zerror) == FAILURE)

return;

ZEND_FETCH_RESOURCE(mq, sysvmsg_queue_t*, &queue, -1, "sysvmsg queue", le_sysvmsg);

if (do_serialize) {

smart_str msg_var = {0};

php_serialize_data_t var_hash;

PHP_VAR_SERIALIZE_INIT(var_hash);

php_var_serialize(&msg_var, &message, &var_hash TSRMLS_CC);

PHP_VAR_SERIALIZE_DESTROY(var_hash);

/* NB: php_msgbuf is 1 char bigger than a long, so there is no need to

* allocate the extra byte. */

messagebuffer = safe_emalloc(msg_var.len, 1, sizeof(struct php_msgbuf));

memcpy(messagebuffer->mtext, msg_var.c, msg_var.len + 1);

message_len = msg_var.len;

smart_str_free(&msg_var);

} else {

char *p;

switch (Z_TYPE_P(message)) {

case IS_STRING:

p = Z_STRVAL_P(message);

message_len = Z_STRLEN_P(message);

break;

case IS_LONG:

case IS_BOOL:

message_len = spprintf(&p, 0, "%ld", Z_LVAL_P(message));

break;

case IS_DOUBLE:

message_len = spprintf(&p, 0, "%f", Z_DVAL_P(message));

break;

default:

php_error_docref(NULL TSRMLS_CC, E_WARNING, "Message parameter must be either a string or a number.");

RETURN_FALSE;

}

messagebuffer = safe_emalloc(message_len, 1, sizeof(struct php_msgbuf));

memcpy(messagebuffer->mtext, p, message_len + 1);

if (Z_TYPE_P(message) != IS_STRING) {

efree(p);

}

/* set the message type */

messagebuffer->mtype = msgtype;

result = msgsnd(mq->id, messagebuffer, message_len, blocking ? 0 : IPC_NOWAIT);

efree(messagebuffer);

if (result == -1) {

zend_error(E_WARNING, "%s(): msgsnd failed: %s",

get_active_function_name(TSRMLS_C), strerror(errno));

if (zerror) {

ZVAL_LONG(zerror, errno);

}

} else {

RETVAL_TRUE;

}

/* }}} */

* Local variables:

* tab-width: 4

* c-basic-offset: 4

* End:

* vim600: noet sw=4 ts=4 tw=78 fdm=marker

* vim<600: noet sw=4 ts=4 tw=78

php-src/ext/sysvmsg/sysvmsg.c at PHP-4.4 · EndlessCoding/php-src · GitHub

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