helly Thu Nov 14 09:40:43 2002 EDT
Modified files: (Branch: PHP_4_3)
/php4/ext/dba dba.c php_dba.h
/php4/ext/dba/tests dba_cdb.phpt dba_db2.phpt dba_db3.phpt
dba_dbm.phpt dba_flatfile.phpt dba_gdbm.phpt
dba_handler.inc dba_ndbm.phpt
Log:
MFH:
Fix locking behaviour: On some systems read during write is permitted but
most libraries are not capable of that. GDBM is system dependant so there
we only test that we do not deadlock.
Index: php4/ext/dba/dba.c
diff -u php4/ext/dba/dba.c:1.61 php4/ext/dba/dba.c:1.61.2.1
--- php4/ext/dba/dba.c:1.61 Mon Nov 11 15:53:41 2002
+++ php4/ext/dba/dba.c Thu Nov 14 09:40:42 2002
@@ -17,7 +17,7 @@
+----------------------------------------------------------------------+
*/
-/* $Id: dba.c,v 1.61 2002/11/11 20:53:41 helly Exp $ */
+/* $Id: dba.c,v 1.61.2.1 2002/11/14 14:40:42 helly Exp $ */
#ifdef HAVE_CONFIG_H
#include "config.h"
@@ -302,6 +302,31 @@
#define FREENOW if(args) efree(args); if(key) efree(key)
+/* {{{ php_find_dbm
+ */
+dba_info *php_dba_find(const char* path TSRMLS_DC)
+{
+ list_entry *le;
+ dba_info *info;
+ int numitems, i;
+
+ numitems = zend_hash_next_free_element(&EG(regular_list));
+ for (i=1; i<numitems; i++) {
+ if (zend_hash_index_find(&EG(regular_list), i, (void **)
+&le)==FAILURE) {
+ continue;
+ }
+ if (Z_TYPE_P(le) == le_db || Z_TYPE_P(le) == le_pdb) {
+ info = (dba_info *)(le->ptr);
+ if (!strcmp(info->path, path)) {
+ return (dba_info *)(le->ptr);
+ }
+ }
+ }
+
+ return NULL;
+}
+/* }}} */
+
/* {{{ php_dba_open
*/
static void php_dba_open(INTERNAL_FUNCTION_PARAMETERS, int persistent)
@@ -309,7 +334,7 @@
zval ***args = (zval ***) NULL;
int ac = ZEND_NUM_ARGS();
dba_mode_t modenr;
- dba_info *info;
+ dba_info *info, *other;
dba_handler *hptr;
char *key = NULL, *error = NULL;
int keylen = 0;
@@ -451,8 +476,24 @@
info->mode = modenr;
info->argc = ac - 3;
info->argv = args + 3;
+ info->flags = (hptr->flags & ~DBA_LOCK_ALL) | (lock_flag & DBA_LOCK_ALL);
+ info->lock.mode = lock_mode;
+
+ /* if any open call is a locking call:
+ * check if we already habe a locking call open that should block this call
+ * the problem is some systems would allow read during write
+ */
+ if (hptr->flags & DBA_LOCK_ALL) {
+ if ((other = php_dba_find(info->path TSRMLS_CC)) != NULL) {
+ if ( ( (lock_mode&LOCK_EX) &&
+(other->lock.mode&(LOCK_EX|LOCK_SH)) )
+ || ( (other->lock.mode&LOCK_EX) &&
+(lock_mode&(LOCK_EX|LOCK_SH)) )
+ ) {
+ error = "Unable to establish lock (database file
+already open)"; /* force failure exit */
+ }
+ }
+ }
- if (lock_mode) {
+ if (!error && lock_mode) {
if (lock_dbf) {
info->lock.name = estrdup(info->path);
lock_file_mode = file_mode;
Index: php4/ext/dba/php_dba.h
diff -u php4/ext/dba/php_dba.h:1.19 php4/ext/dba/php_dba.h:1.19.2.1
--- php4/ext/dba/php_dba.h:1.19 Sun Nov 10 12:58:46 2002
+++ php4/ext/dba/php_dba.h Thu Nov 14 09:40:42 2002
@@ -16,7 +16,7 @@
+----------------------------------------------------------------------+
*/
-/* $Id: php_dba.h,v 1.19 2002/11/10 17:58:46 helly Exp $ */
+/* $Id: php_dba.h,v 1.19.2.1 2002/11/14 14:40:42 helly Exp $ */
#ifndef PHP_DBA_H
#define PHP_DBA_H
@@ -35,6 +35,7 @@
php_stream *fp;
int fd;
char *name;
+ int mode; /* LOCK_EX,LOCK_SH */
} dba_lock;
typedef struct dba_info {
@@ -47,6 +48,7 @@
int argc;
zval ***argv;
/* private */
+ int flags; /* whether and how dba did locking and other flags*/
struct dba_handler *hnd;
dba_lock lock;
} dba_info;
Index: php4/ext/dba/tests/dba_cdb.phpt
diff -u php4/ext/dba/tests/dba_cdb.phpt:1.4 php4/ext/dba/tests/dba_cdb.phpt:1.4.2.1
--- php4/ext/dba/tests/dba_cdb.phpt:1.4 Wed Nov 6 06:18:00 2002
+++ php4/ext/dba/tests/dba_cdb.phpt Thu Nov 14 09:40:43 2002
@@ -17,7 +17,7 @@
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write: not allowed
Content 2 replaced 2nd time
The 6th value
array(3) {
Index: php4/ext/dba/tests/dba_db2.phpt
diff -u php4/ext/dba/tests/dba_db2.phpt:1.2 php4/ext/dba/tests/dba_db2.phpt:1.2.2.1
--- php4/ext/dba/tests/dba_db2.phpt:1.2 Wed Nov 6 06:18:00 2002
+++ php4/ext/dba/tests/dba_db2.phpt Thu Nov 14 09:40:43 2002
@@ -16,7 +16,7 @@
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write: not allowed
Content 2 replaced 2nd time
The 6th value
array(3) {
Index: php4/ext/dba/tests/dba_db3.phpt
diff -u php4/ext/dba/tests/dba_db3.phpt:1.2 php4/ext/dba/tests/dba_db3.phpt:1.2.2.1
--- php4/ext/dba/tests/dba_db3.phpt:1.2 Wed Nov 6 06:18:00 2002
+++ php4/ext/dba/tests/dba_db3.phpt Thu Nov 14 09:40:43 2002
@@ -16,7 +16,7 @@
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write: not allowed
Content 2 replaced 2nd time
The 6th value
array(3) {
Index: php4/ext/dba/tests/dba_dbm.phpt
diff -u php4/ext/dba/tests/dba_dbm.phpt:1.2 php4/ext/dba/tests/dba_dbm.phpt:1.2.2.1
--- php4/ext/dba/tests/dba_dbm.phpt:1.2 Wed Nov 6 06:18:00 2002
+++ php4/ext/dba/tests/dba_dbm.phpt Thu Nov 14 09:40:43 2002
@@ -16,7 +16,7 @@
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write: not allowed
Content 2 replaced 2nd time
The 6th value
array(3) {
Index: php4/ext/dba/tests/dba_flatfile.phpt
diff -u php4/ext/dba/tests/dba_flatfile.phpt:1.2
php4/ext/dba/tests/dba_flatfile.phpt:1.2.2.1
--- php4/ext/dba/tests/dba_flatfile.phpt:1.2 Wed Nov 6 06:18:00 2002
+++ php4/ext/dba/tests/dba_flatfile.phpt Thu Nov 14 09:40:43 2002
@@ -16,7 +16,7 @@
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write: not allowed
Content 2 replaced 2nd time
The 6th value
array(3) {
Index: php4/ext/dba/tests/dba_gdbm.phpt
diff -u php4/ext/dba/tests/dba_gdbm.phpt:1.3 php4/ext/dba/tests/dba_gdbm.phpt:1.3.2.1
--- php4/ext/dba/tests/dba_gdbm.phpt:1.3 Sun Nov 10 17:56:29 2002
+++ php4/ext/dba/tests/dba_gdbm.phpt Thu Nov 14 09:40:43 2002
@@ -11,13 +11,15 @@
$handler = 'gdbm';
$lock_flag = ''; // lock in library
require_once('dba_handler.inc');
+
+ // Read during write is system dependant. Important is that there is no
+deadlock
?>
---EXPECT--
+--EXPECTF--
database handler: gdbm
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write:%sallowed
Content 2 replaced 2nd time
The 6th value
array(3) {
Index: php4/ext/dba/tests/dba_handler.inc
diff -u php4/ext/dba/tests/dba_handler.inc:1.7
php4/ext/dba/tests/dba_handler.inc:1.7.2.1
--- php4/ext/dba/tests/dba_handler.inc:1.7 Mon Nov 11 07:00:58 2002
+++ php4/ext/dba/tests/dba_handler.inc Thu Nov 14 09:40:43 2002
@@ -28,9 +28,9 @@
}
$db_writer = dba_open($db_filename, 'w'.$lock_flag, $handler);
if (($dba_reader = @dba_open($db_filename, 'r'.$lock_flag.($lock_flag ? 't' :
''), $handler))===false) {
- echo "Cannot read during write operation\n";
+ echo "Read during write: not allowed\n";
} else {
- echo "Read during write permitted\n";
+ echo "Read during write: allowed\n";
}
if ($db_writer!==FALSE) {
dba_insert("key number 6", "The 6th value", $db_writer);
Index: php4/ext/dba/tests/dba_ndbm.phpt
diff -u php4/ext/dba/tests/dba_ndbm.phpt:1.2 php4/ext/dba/tests/dba_ndbm.phpt:1.2.2.1
--- php4/ext/dba/tests/dba_ndbm.phpt:1.2 Wed Nov 6 06:18:00 2002
+++ php4/ext/dba/tests/dba_ndbm.phpt Thu Nov 14 09:40:43 2002
@@ -16,7 +16,7 @@
3NYNYY
Content String 2
Content 2 replaced
-Read during write permitted
+Read during write: not allowed
Content 2 replaced 2nd time
The 6th value
array(3) {
--
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