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      1 # 2009 March 24
      2 #
      3 # The author disclaims copyright to this source code.  In place of
      4 # a legal notice, here is a blessing:
      5 #
      6 #    May you do good and not evil.
      7 #    May you find forgiveness for yourself and forgive others.
      8 #    May you share freely, never taking more than you give.
      9 #
     10 #***********************************************************************
     11 #
     12 
     13 set testdir [file dirname $argv0]
     14 source $testdir/tester.tcl
     15 
     16 ifcapable {!pager_pragmas} {
     17   finish_test
     18   return
     19 }
     20 
     21 #-------------------------------------------------------------------------
     22 # The tests in this file check that the following two bugs (both now fixed)
     23 # do not reappear.
     24 #
     25 # jrnlmode2-1.*: Demonstrate bug #3745:
     26 #
     27 #     In persistent journal mode, if:
     28 #
     29 #       * There is a persistent journal in the file-system, AND
     30 #       * there exists a connection with a shared lock on the db file, 
     31 #
     32 #     then a second connection cannot open a read-transaction on the database.
     33 #     The reason is because while determining that the persistent-journal is
     34 #     not a hot-journal, SQLite currently grabs an exclusive lock on the
     35 #     database file. If this fails because another connection has a shared
     36 #     lock, then SQLITE_BUSY is returned to the user.  
     37 #
     38 # jrnlmode2-2.*: Demonstrate bug #3751:
     39 #
     40 #     If a connection is opened in SQLITE_OPEN_READONLY mode, the underlying
     41 #     unix file descriptor on the database file is opened in O_RDONLY mode.
     42 #
     43 #     When SQLite queries the database file for the schema in order to compile
     44 #     the SELECT statement, it sees the empty journal in the file system, it
     45 #     attempts to obtain an exclusive lock on the database file (this is a
     46 #     bug). The attempt to obtain an exclusive (write) lock on a read-only file
     47 #     fails at the OS level. Under unix, fcntl() reports an EBADF - "Bad file
     48 #     descriptor" - error. 
     49 #
     50 
     51 do_test jrnlmode2-1.1 {
     52   execsql {
     53     PRAGMA journal_mode = persist;
     54     CREATE TABLE t1(a, b);
     55     INSERT INTO t1 VALUES(1, 2);
     56   }
     57 } {persist}
     58 
     59 do_test jrnlmode2-1.2 {
     60   file exists test.db-journal
     61 } {1}
     62 
     63 do_test jrnlmode2-1.3 {
     64   sqlite3 db2 test.db
     65   execsql { SELECT * FROM t1 } db2
     66 } {1 2}
     67 
     68 do_test jrnlmode2-1.4 {
     69   execsql {
     70     INSERT INTO t1 VALUES(3, 4);
     71   }
     72   execsql {
     73     BEGIN;
     74     SELECT * FROM t1;
     75   }
     76   execsql { PRAGMA lock_status }
     77 } {main shared temp closed}
     78 
     79 do_test jrnlmode2-1.5 {
     80   file exists test.db-journal
     81 } {1}
     82 
     83 do_test jrnlmode2-1.6 {
     84   catchsql { SELECT * FROM t1 } db2
     85 } {0 {1 2 3 4}}
     86 
     87 do_test jrnlmode2-1.7 {
     88   execsql { COMMIT }
     89   catchsql { SELECT * FROM t1 } db2
     90 } {0 {1 2 3 4}}
     91 
     92 
     93 
     94 do_test jrnlmode2-2.1 {
     95   db2 close
     96   execsql { PRAGMA journal_mode = truncate }
     97   execsql { INSERT INTO t1 VALUES(5, 6) }
     98 } {}
     99 
    100 do_test jrnlmode2-2.2 {
    101   file exists test.db-journal
    102 } {1}
    103 
    104 do_test jrnlmode2-2.3 {
    105   file size test.db-journal
    106 } {0}
    107 
    108 do_test jrnlmode2-2.4 {
    109   sqlite3 db2 test.db -readonly 1
    110   catchsql { SELECT * FROM t1 } db2
    111 } {0 {1 2 3 4 5 6}}
    112 
    113 do_test jrnlmode2-2.5 {
    114   db close
    115   file delete test.db-journal
    116 } {}
    117 do_test jrnlmode2-2.6 {
    118   sqlite3 db2 test.db -readonly 1
    119   catchsql { SELECT * FROM t1 } db2
    120 } {0 {1 2 3 4 5 6}}
    121 
    122 catch { db2 close }
    123 finish_test
    124