Fix a case where an error code was being overwritten in multiplexDelete().

FossilOrigin-Name: c267893a0813beb1764071409025e178318e1ca3

manifest

@@ -1,5 +1,5 @@
-C Fix\sthe\sxDelete\simplementation\sof\sthe\smultiplexor\sVFS\sso\sthat\sit\scorrectly\ndeletes\soverflow\sWAL\sfiles.
-D 2012-02-27T14:28:50.338
+C Fix\sa\scase\swhere\san\serror\scode\swas\sbeing\soverwritten\sin\smultiplexDelete().
+D 2012-02-28T11:52:12.825
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 3f79a373e57c3b92dabf76f40b065e719d31ac34
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -214,7 +214,7 @@ F src/test_intarray.h 489edb9068bb926583445cb02589344961054207
 F src/test_journal.c a6a6baf343f79b942331f13378d045e7e270ae64
 F src/test_loadext.c df586c27176e3c2cb2e099c78da67bf14379a56e
 F src/test_malloc.c cfe25d74333892ababde61196821a889b4756dee
-F src/test_multiplex.c 0b3111a8c1b11963b2ca17a4b47219a5942bc9c0
+F src/test_multiplex.c 0404a61d7795438be5ee5fd3711eed80724df34d
 F src/test_multiplex.h e99c571bc4968b7a9363b661481f3934bfead61d
 F src/test_mutex.c a6bd7b9cf6e19d989e31392b06ac8d189f0d573e
 F src/test_onefile.c 40cf9e212a377a6511469384a64b01e6e34b2eec
@@ -613,7 +613,7 @@ F test/misc7.test 6743b810884ef64ae14c07ad1f9f858c40c06100
 F test/misuse.test ba4fb5d1a6101d1c171ea38b3c613d0661c83054
 F test/multiplex.test e08cc7177bd6d85990ee1d71100bb6c684c02256
 F test/multiplex2.test 580ca5817c7edbe4cc68fa150609c9473393003a
-F test/multiplex3.test 15903c343f1eaa4b00998b7ceacfc4987e4ccfe9
+F test/multiplex3.test d228f59eac91839a977eac19f21d053f03e4d101
 F test/mutex1.test 78b2b9bb320e51d156c4efdb71b99b051e7a4b41
 F test/mutex2.test bfeaeac2e73095b2ac32285d2756e3a65e681660
 F test/nan.test e9648b9d007c7045242af35e11a984d4b169443a
@@ -990,7 +990,7 @@ F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings-clang.sh 9f406d66e750e8ac031c63a9ef3248aaa347ef2a
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
-P d6850667ea61172ea0ebea4a22b6b306f74775fa
-R ea71d798aaf411fbd421b77e33a3053e
-U drh
-Z 3207ff66d565aff181a5c8c10cee009f
+P e44e26771e5aa48f3bfa14d6db3e669b5b2a1e73
+R a83bd20b956aa8e93cec00d5fc1e4306
+U dan
+Z a4ff6a0dae74370332c0513312e14191

manifest.uuid

@@ -1 +1 @@
-e44e26771e5aa48f3bfa14d6db3e669b5b2a1e73
+c267893a0813beb1764071409025e178318e1ca3

src/test_multiplex.c

@@ -657,14 +657,16 @@ static int multiplexDelete(
         multiplexFilename(zName, nName, SQLITE_OPEN_MAIN_JOURNAL, --iChunk, z);
         rc = pOrigVfs->xDelete(pOrigVfs, z, syncDir);
       }
-      iChunk = 0;
-      do{
-        multiplexFilename(zName, nName, SQLITE_OPEN_WAL, ++iChunk, z);
-        rc = pOrigVfs->xAccess(pOrigVfs, z, SQLITE_ACCESS_EXISTS, &bExists);
-      }while( rc==SQLITE_OK && bExists );
-      while( rc==SQLITE_OK && iChunk>1 ){
-        multiplexFilename(zName, nName, SQLITE_OPEN_WAL, --iChunk, z);
-        rc = pOrigVfs->xDelete(pOrigVfs, z, syncDir);
+      if( rc==SQLITE_OK ){
+        iChunk = 0;
+        do{
+          multiplexFilename(zName, nName, SQLITE_OPEN_WAL, ++iChunk, z);
+          rc = pOrigVfs->xAccess(pOrigVfs, z, SQLITE_ACCESS_EXISTS, &bExists);
+        }while( rc==SQLITE_OK && bExists );
+        while( rc==SQLITE_OK && iChunk>1 ){
+          multiplexFilename(zName, nName, SQLITE_OPEN_WAL, --iChunk, z);
+          rc = pOrigVfs->xDelete(pOrigVfs, z, syncDir);
+        }
       }
     }
     sqlite3_free(z);

test/multiplex3.test

@@ -127,6 +127,39 @@ for {set iTest 1} {$iTest<=100} {incr iTest} {
 
   db2 close
 }
+catch { db close }
+
+
+do_test 3.0 { setup_and_save_db } {}
+do_faultsim_test 3 -faults ioerr-trans* -prep {
+
+  forcedelete test2.db
+  set fd [open test2.wal w]
+  seek $fd 4095
+  puts -nonewline $fd x
+  close $fd
+
+  multiplex_restore_db
+  sqlite3 db file:test.db?8_3_names=1
+  sqlite3 db2 file:test2.db?8_3_names=1
+  sqlite3_multiplex_control db main chunk_size [expr 256*1024]
+  sqlite3_multiplex_control db2 main chunk_size [expr 256*1024]
+} -body {
+  sqlite3_backup B db2 main db main
+  B step 100000
+  set rc [B finish]
+  if { [string match SQLITE_IOERR_* $rc] } {error "disk I/O error"}
+  set rc
+} -test {
+  faultsim_test_result {0 SQLITE_OK}
+  if {$testrc==0} {
+    set cksum2 [execsql {SELECT md5sum(a, b) FROM t1 ORDER BY a} db2]
+    if {$cksum2 != $::cksum1} { error "data mismatch" }
+  }
+  catch { B finish }
+  catch { db close }
+  catch { db2 close }
+}
 
 catch { db close }
 sqlite3_multiplex_shutdown