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+# 2011 March 30
+#
+# The author disclaims copyright to this source code. In place of
+# a legal notice, here is a blessing:
+#
+# May you do good and not evil.
+# May you find forgiveness for yourself and forgive others.
+# May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# This file contains tests for the "unix-excl" VFS module (part of
+# os_unix.c).
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+source $testdir/lock_common.tcl
+source $testdir/malloc_common.tcl
+
+if {$::tcl_platform(platform)!="unix" || [info commands test_syscall]==""} {
+ finish_test
+ return
+}
+set testprefix unixexcl
+
+
+
+# Test that when using VFS "unix-excl", the first time the database is read
+# a process-wide exclusive lock is taken on it. This means other connections
+# within the process may still access the db normally, but connections from
+# outside the process cannot.
+#
+do_multiclient_test tn {
+ do_test unixexcl-1.$tn.1 {
+ sql1 {
+ CREATE TABLE t1(a, b);
+ INSERT INTO t1 VALUES('hello', 'world');
+ }
+ } {}
+ do_test unixexcl-1.$tn.2 { sql2 { SELECT * FROM t1 } } {hello world}
+ do_test unixexcl-1.$tn.3 {
+ code1 {
+ db close
+ sqlite3 db test.db -vfs unix-excl
+ db eval { SELECT * FROM t1 }
+ }
+ } {hello world}
+ if {$tn==1} {
+ do_test unixexcl-1.$tn.4.multiproc {
+ csql2 { SELECT * FROM t1 }
+ } {1 {database is locked}}
+ } else {
+ do_test unixexcl-1.$tn.4.singleproc {
+ csql2 { SELECT * FROM t1 }
+ } {0 {hello world}}
+ }
+}
+
+# Test that when using VFS "unix-excl", if a file is opened in read-only mode
+# the behaviour is the same as if VFS "unix" were used.
+#
+do_multiclient_test tn {
+ do_test unixexcl-2.$tn.1 {
+ sql1 {
+ CREATE TABLE t1(a, b);
+ INSERT INTO t1 VALUES('hello', 'world');
+ }
+ } {}
+ do_test unixexcl-2.$tn.2 { sql2 { SELECT * FROM t1 } } {hello world}
+ do_test unixexcl-2.$tn.3 {
+ code1 {
+ db close
+ sqlite3 db test.db -readonly yes -vfs unix-excl
+ db eval { SELECT * FROM t1 }
+ }
+ } {hello world}
+ do_test unixexcl-2.$tn.4 {
+ csql2 { SELECT * FROM t1 }
+ } {0 {hello world}}
+}
+
+do_multiclient_test tn {
+ do_test unixexcl-3.$tn.1 {
+ code1 { db close; sqlite3 db file:test.db?psow=0 -vfs unix-excl -uri 1 }
+ code2 { db2 close; sqlite3 db2 file:test.db?psow=0 -vfs unix-excl -uri 1 }
+ sql1 {
+ PRAGMA auto_vacuum = 0;
+ PRAGMA journal_mode = WAL;
+ PRAGMA synchronous = FULL;
+ CREATE TABLE t1(a, b);
+ INSERT INTO t1 VALUES(1, 2);
+ }
+ } {wal}
+
+ if {$tn==1} {
+ do_test unixexcl-3.$tn.1.multiproc {
+ csql2 { SELECT * FROM t1; }
+ } {1 {database is locked}}
+ } else {
+ do_test unixexcl-3.$tn.1.singleproc {
+ sql2 { SELECT * FROM t1; }
+ } {1 2}
+
+ do_test unixexcl-3.$tn.2 {
+ sql2 {
+ BEGIN;
+ SELECT * FROM t1;
+ }
+ } {1 2}
+ do_test unixexcl-3.$tn.3 {
+ sql1 { PRAGMA wal_checkpoint; INSERT INTO t1 VALUES(3, 4); }
+ } {0 5 5}
+ do_test unixexcl-3.$tn.4 {
+ sql2 { SELECT * FROM t1; }
+ } {1 2}
+ do_test unixexcl-3.$tn.5 {
+ sql1 { SELECT * FROM t1; }
+ } {1 2 3 4}
+ do_test unixexcl-3.$tn.6 {
+ sql2 { COMMIT; SELECT * FROM t1; }
+ } {1 2 3 4}
+ do_test unixexcl-3.$tn.7 {
+ sql1 { PRAGMA wal_checkpoint; }
+ } {0 7 7}
+ }
+}
+
+finish_test