When the write_version flag in the database header is larger than what

the library understands, make the database read-only.  The old behavior
was to make the database unreadable. (CVS 3866)

FossilOrigin-Name: 10648e99929b4f640855433b6e47702687039286
This commit is contained in:
drh 2007-04-24 17:27:51 +00:00
parent af30469d67
commit 309169a118
4 changed files with 86 additions and 13 deletions

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@ -1,5 +1,5 @@
C Get\sthe\sbuild\sworking\swith\s-DSQLITE_OMIT_UTF16=1.\s\sTicket\s#2314.\s(CVS\s3865)
D 2007-04-23T23:56:31
C When\sthe\swrite_version\sflag\sin\sthe\sdatabase\sheader\sis\slarger\sthan\swhat\nthe\slibrary\sunderstands,\smake\sthe\sdatabase\sread-only.\s\sThe\sold\sbehavior\nwas\sto\smake\sthe\sdatabase\sunreadable.\s(CVS\s3866)
D 2007-04-24T17:27:51
F Makefile.in 8cab54f7c9f5af8f22fd97ddf1ecfd1e1860de62
F Makefile.linux-gcc 2d8574d1ba75f129aba2019f0b959db380a90935
F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@ -59,7 +59,7 @@ F src/alter.c 2c79ec40f65e33deaf90ca493422c74586e481a3
F src/analyze.c 4bbf5ddf9680587c6d4917e02e378b6037be3651
F src/attach.c a16ada4a4654a0d126b8223ec9494ebb81bc5c3c
F src/auth.c 902f4722661c796b97f007d9606bd7529c02597f
F src/btree.c bed25c6af7eb2cc4bd8a1d11acb4682a7f0a81e3
F src/btree.c 16119ce57ff10217f15b0b4c86d176ee5335a94f
F src/btree.h 9b2cc0d113c0bc2d37d244b9a394d56948c9acbf
F src/build.c 1880da163d9aa404016242b8b76d69907f682cd8
F src/callback.c 6414ed32d55859d0f65067aa5b88d2da27b3af9e
@ -297,6 +297,7 @@ F test/printf.test 483b9fe75ffae1fb27328bdce5560b452ba83577
F test/progress.test 8b22b4974b0a95272566385f8cb8c341c7130df8 x
F test/quick.test 8e7ffe36a1c920cdcce5d641646abde2dafd764b
F test/quote.test 5891f2338980916cf7415484b4ce785294044adb
F test/rdonly.test b34db316525440d3b42c32e83942c02c37d28ef0
F test/reindex.test 38b138abe36bf9a08c791ed44d9f76cd6b97b78b
F test/rollback.test 673cd8c44c685ad54987fe7f0eeba84efa09685d
F test/rowid.test 040a3bef06f970c45f5fcd14b2355f7f4d62f0cf
@ -460,7 +461,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
F www/whentouse.tcl fc46eae081251c3c181bd79c5faef8195d7991a5
P 94374654ccabb391f5dcccfc88176ca677c5804e
R d7b272e26c6d36664b64086fdb9d371b
P 25c1c7aaa8ef203120c2c242cf72ce4750f78abd
R 3fc076971d716b426bc268b75c0ef34b
U drh
Z baebe6d339241fecad908b7b83716212
Z 82843ae5ccf4a2ae39514c6de28aac15

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@ -1 +1 @@
25c1c7aaa8ef203120c2c242cf72ce4750f78abd
10648e99929b4f640855433b6e47702687039286

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@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.356 2007/04/19 00:24:34 drh Exp $
** $Id: btree.c,v 1.357 2007/04/24 17:27:51 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
@ -1870,7 +1870,10 @@ static int lockBtree(BtShared *pBt){
if( memcmp(page1, zMagicHeader, 16)!=0 ){
goto page1_init_failed;
}
if( page1[18]>1 || page1[19]>1 ){
if( page1[18]>1 ){
pBt->readOnly = 1;
}
if( page1[19]>1 ){
goto page1_init_failed;
}
pageSize = get2byte(&page1[16]);
@ -2068,11 +2071,15 @@ int sqlite3BtreeBeginTrans(Btree *p, int wrflag){
if( pBt->pPage1==0 ){
rc = lockBtree(pBt);
}
if( rc==SQLITE_OK && wrflag ){
rc = sqlite3PagerBegin(pBt->pPage1->pDbPage, wrflag>1);
if( rc==SQLITE_OK ){
rc = newDatabase(pBt);
if( pBt->readOnly ){
rc = SQLITE_READONLY;
}else{
rc = sqlite3PagerBegin(pBt->pPage1->pDbPage, wrflag>1);
if( rc==SQLITE_OK ){
rc = newDatabase(pBt);
}
}
}

65
test/rdonly.test Normal file
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@ -0,0 +1,65 @@
# 2007 April 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests to make sure SQLite treats a database
# as readonly if its write version is set to high.
#
# $Id: rdonly.test,v 1.1 2007/04/24 17:27:52 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Create a database.
#
do_test rdonly-1.1 {
execsql {
CREATE TABLE t1(x);
INSERT INTO t1 VALUES(1);
SELECT * FROM t1;
}
} {1}
# Changes the write version from 1 to 2. Verify that the database
# can be read but not written.
#
do_test rdonly-1.2 {
db close
hexio_get_int [hexio_read test.db 18 1]
} 1
do_test rdonly-1.3 {
hexio_write test.db 18 02
sqlite3 db test.db
execsql {
SELECT * FROM t1;
}
} {1}
do_test rdonly-1.4 {
catchsql {
INSERT INTO t1 VALUES(2)
}
} {1 {attempt to write a readonly database}}
# Change the write version back to 1. Verify that the database
# is read-write again.
#
do_test rdonly-1.5 {
db close
hexio_write test.db 18 01
sqlite3 db test.db
catchsql {
INSERT INTO t1 VALUES(2);
SELECT * FROM t1;
}
} {0 {1 2}}
finish_test