1 # 2009 August 20 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 # This file implements regression tests for SQLite library. 12 # 13 # This file implements tests to verify that ticket #4018 has been 14 # fixed. 15 # 16 17 set testdir [file dirname $argv0] 18 source $testdir/tester.tcl 19 20 proc testsql {sql} { 21 set fd [open tf_main.tcl w] 22 puts $fd [subst -nocommands { 23 sqlite3_test_control_pending_byte 0x0010000 24 sqlite3 db test.db 25 set rc [catch { db eval {$sql} } msg] 26 puts -nonewline "[set rc] {[set msg]}" 27 flush stdout 28 exit 29 }] 30 close $fd 31 set fd [open "| [info nameofexec] ./tf_main.tcl" r] 32 set res [read $fd] 33 close $fd 34 return $res 35 } 36 37 do_test tkt4018-1.1 { 38 execsql { 39 CREATE TABLE t1(a, b); 40 BEGIN; 41 SELECT * FROM t1; 42 } 43 } {} 44 45 # The database is locked by connection [db]. Open and close a second 46 # connection to test.db 10000 times. If file-descriptors are not being 47 # reused, then the process will quickly exceed its maximum number of 48 # file descriptors (1024 by default on linux). 49 do_test tkt4018-1.2 { 50 for {set i 0} {$i < 10000} {incr i} { 51 sqlite3 db2 test.db 52 db2 close 53 } 54 } {} 55 56 # Now check that connection [db] is still holding a SHARED lock by 57 # having a second process try to write the db. 58 do_test tkt4018-1.3 { 59 testsql {INSERT INTO t1 VALUES(3, 4)} 60 } {1 {database is locked}} 61 62 # Sanity checking. Have [db] release the lock and then retry the 63 # INSERT from the previous test case. 64 do_test tkt4018-1.4 { 65 db eval COMMIT 66 testsql {INSERT INTO t1 VALUES(3, 4)} 67 } {0 {}} 68 69 # Check that reusing a file descriptor cannot change a read-only 70 # connection into a read-write connection. 71 do_test tkt4018-2.1 { 72 sqlite3 db2 test.db 73 execsql {INSERT INTO t1 VALUES(1, 2)} db2 74 } {} 75 do_test tkt4018-2.2 { 76 execsql { 77 BEGIN; 78 SELECT * FROM t1 ORDER BY a; 79 } 80 } {1 2 3 4} 81 do_test tkt4018-2.3 { 82 db2 close 83 sqlite3 db2 test.db -readonly 1 84 execsql COMMIT 85 catchsql {INSERT INTO t1 VALUES(5, 6)} db2 86 } {1 {attempt to write a readonly database}} 87 db2 close 88 89 finish_test 90
