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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
13set testdir [file dirname $argv0]
14source $testdir/tester.tcl
15
16ifcapable {!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
51do_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
59do_test jrnlmode2-1.2 {
60  file exists test.db-journal
61} {1}
62
63do_test jrnlmode2-1.3 {
64  sqlite3 db2 test.db
65  execsql { SELECT * FROM t1 } db2
66} {1 2}
67
68do_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
79do_test jrnlmode2-1.5 {
80  file exists test.db-journal
81} {1}
82
83do_test jrnlmode2-1.6 {
84  catchsql { SELECT * FROM t1 } db2
85} {0 {1 2 3 4}}
86
87do_test jrnlmode2-1.7 {
88  execsql { COMMIT }
89  catchsql { SELECT * FROM t1 } db2
90} {0 {1 2 3 4}}
91
92
93
94do_test jrnlmode2-2.1 {
95  db2 close
96  execsql { PRAGMA journal_mode = truncate }
97  execsql { INSERT INTO t1 VALUES(5, 6) }
98} {}
99
100do_test jrnlmode2-2.2 {
101  file exists test.db-journal
102} {1}
103
104do_test jrnlmode2-2.3 {
105  file size test.db-journal
106} {0}
107
108do_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
113do_test jrnlmode2-2.5 {
114  db close
115  file delete test.db-journal
116} {}
117do_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
122catch { db2 close }
123finish_test
124