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+# 2009 March 24
+#
+# 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.
+#
+#***********************************************************************
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable {!pager_pragmas} {
+ finish_test
+ return
+}
+
+if {[atomic_batch_write test.db]} {
+ finish_test
+ return
+}
+
+#-------------------------------------------------------------------------
+# The tests in this file check that the following two bugs (both now fixed)
+# do not reappear.
+#
+# jrnlmode2-1.*: Demonstrate bug #3745:
+#
+# In persistent journal mode, if:
+#
+# * There is a persistent journal in the file-system, AND
+# * there exists a connection with a shared lock on the db file,
+#
+# then a second connection cannot open a read-transaction on the database.
+# The reason is because while determining that the persistent-journal is
+# not a hot-journal, SQLite currently grabs an exclusive lock on the
+# database file. If this fails because another connection has a shared
+# lock, then SQLITE_BUSY is returned to the user.
+#
+# jrnlmode2-2.*: Demonstrate bug #3751:
+#
+# If a connection is opened in SQLITE_OPEN_READONLY mode, the underlying
+# unix file descriptor on the database file is opened in O_RDONLY mode.
+#
+# When SQLite queries the database file for the schema in order to compile
+# the SELECT statement, it sees the empty journal in the file system, it
+# attempts to obtain an exclusive lock on the database file (this is a
+# bug). The attempt to obtain an exclusive (write) lock on a read-only file
+# fails at the OS level. Under unix, fcntl() reports an EBADF - "Bad file
+# descriptor" - error.
+#
+
+do_test jrnlmode2-1.1 {
+ execsql {
+ PRAGMA journal_mode = persist;
+ CREATE TABLE t1(a, b);
+ INSERT INTO t1 VALUES(1, 2);
+ }
+} {persist}
+
+do_test jrnlmode2-1.2 {
+ file exists test.db-journal
+} {1}
+
+do_test jrnlmode2-1.3 {
+ sqlite3 db2 test.db
+ execsql { SELECT * FROM t1 } db2
+} {1 2}
+
+do_test jrnlmode2-1.4 {
+ execsql {
+ INSERT INTO t1 VALUES(3, 4);
+ }
+ execsql {
+ BEGIN;
+ SELECT * FROM t1;
+ }
+ execsql { PRAGMA lock_status }
+} {main shared temp closed}
+
+do_test jrnlmode2-1.5 {
+ file exists test.db-journal
+} {1}
+
+do_test jrnlmode2-1.6 {
+ catchsql { SELECT * FROM t1 } db2
+} {0 {1 2 3 4}}
+
+do_test jrnlmode2-1.7 {
+ execsql { COMMIT }
+ catchsql { SELECT * FROM t1 } db2
+} {0 {1 2 3 4}}
+
+
+
+do_test jrnlmode2-2.1 {
+ db2 close
+ execsql { PRAGMA journal_mode = truncate }
+ execsql { INSERT INTO t1 VALUES(5, 6) }
+} {}
+
+do_test jrnlmode2-2.2 {
+ file exists test.db-journal
+} {1}
+
+do_test jrnlmode2-2.3 {
+ file size test.db-journal
+} {0}
+
+do_test jrnlmode2-2.4 {
+ sqlite3 db2 test.db -readonly 1
+ catchsql { SELECT * FROM t1 } db2
+} {0 {1 2 3 4 5 6}}
+
+do_test jrnlmode2-2.5 {
+ db close
+ delete_file test.db-journal
+} {}
+do_test jrnlmode2-2.6 {
+ sqlite3 db2 test.db -readonly 1
+ catchsql { SELECT * FROM t1 } db2
+} {0 {1 2 3 4 5 6}}
+
+catch { db2 close }
+finish_test