From: drh <drh@noemail.net>
Date: Thu, 25 May 2006 11:52:37 +0000 (+0000)
Subject: Handle NULL database names in ATTACH and DETACH as if they were empty
X-Git-Tag: version-3.6.10~2976
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ea063f5bb1b0e66174967b13cdff6127ea6432ce;p=thirdparty%2Fsqlite.git

Handle NULL database names in ATTACH and DETACH as if they were empty
strings.  Ticket #1825. (CVS 3191)

FossilOrigin-Name: 79a818bb05bc95c4c83375a679955dd18659b2b8
---

diff --git a/manifest b/manifest
index 24b25ecb34..bbdb363a40 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C When\sopening\sa\snew\sconnection\son\sa\sshared\scache,\sbe\scareful\snot\sto\noverwrite\sthe\sencoding\sflag\son\sthe\sshared\scache.\s\sTicket\s#1824.\s(CVS\s3190)
-D 2006-05-24T12:43:27
+C Handle\sNULL\sdatabase\snames\sin\sATTACH\sand\sDETACH\sas\sif\sthey\swere\sempty\nstrings.\s\sTicket\s#1825.\s(CVS\s3191)
+D 2006-05-25T11:52:38
 F Makefile.in 5d8dff443383918b700e495de42ec65bc1c8865b
 F Makefile.linux-gcc 74ba0eadf88748a9ce3fd03d2a3ede2e6715baec
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -32,7 +32,7 @@ F sqlite3.def f756049b1bf3e8442baf6862db393ca423225262
 F sqlite3.pc.in 985b9bf34192a549d7d370e0f0b6b34a4f61369a
 F src/alter.c 451b34fc4eb2475ca76a2e86b21e1030a9428091
 F src/analyze.c 7d2b7ab9a9c2fd6e55700f69064dfdd3e36d7a8a
-F src/attach.c 765217a681eb0fb68f95f372604d4fa4594a503f
+F src/attach.c 27a31d3b89d7ebb5b358847607b1ec795384123c
 F src/auth.c 9ae84d2d94eb96195e04515715e08e85963e96c2
 F src/btree.c ed343b3dbcbc7da9ac481ef2b98c4239fe6d9629
 F src/btree.h 40055cfc09defd1146bc5b922399c035f969e56d
@@ -109,7 +109,7 @@ F test/async.test 464dc7c7ccb144e8c82ecca429e6d7cd1c96bd6e
 F test/async2.test 81e4a1fd010c903eb3b763fdb4c4cad7a99afb14
 F test/attach.test 036315207c477211470168bf121b1c493f781515
 F test/attach2.test 0e6a7c54343c85dd877a1e86073a05176043ed40
-F test/attach3.test 63013383adc4380af69779f34f4af19bd49f7cbe
+F test/attach3.test fc0302e8fe9c172fb49e000227c19b5c428a9429
 F test/attachmalloc.test cdb26c42850f04698377ccec05f5fa89d987837c
 F test/auth.test 9776ab43de94801f0fa6787b3f3e803686ffa0ff
 F test/autoinc.test 60005a676e3e4e17dfa9dbd08aa0b76587ff97e3
@@ -356,7 +356,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
 F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
-P b93e3fb02aeff7fe6cae56c3a45c43ffdb2f030b
-R 6f1ef5bdf0e46314fcf96d09a1927ff3
+P c8e5ceedee087098c04e3b6b8b82710de0563e77
+R 92b272fc10eef000585a2fbf978f3171
 U drh
-Z 3023c12e4514d7a00d29c00958bc4963
+Z a97a523d146f3a82e0903b8c989a26c5
diff --git a/manifest.uuid b/manifest.uuid
index 865caf739d..e1d9a0015d 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-c8e5ceedee087098c04e3b6b8b82710de0563e77
\ No newline at end of file
+79a818bb05bc95c4c83375a679955dd18659b2b8
\ No newline at end of file
diff --git a/src/attach.c b/src/attach.c
index 7e823930b0..a6a72a333c 100644
--- a/src/attach.c
+++ b/src/attach.c
@@ -11,7 +11,7 @@
 *************************************************************************
 ** This file contains code used to implement the ATTACH and DETACH commands.
 **
-** $Id: attach.c,v 1.51 2006/04/10 13:37:47 drh Exp $
+** $Id: attach.c,v 1.52 2006/05/25 11:52:38 drh Exp $
 */
 #include "sqliteInt.h"
 
@@ -73,6 +73,8 @@ static void attachFunc(
 
   zFile = (const char *)sqlite3_value_text(argv[0]);
   zName = (const char *)sqlite3_value_text(argv[1]);
+  if( zFile==0 ) zFile = "";
+  if( zName==0 ) zName = "";
 
   /* Check for the following errors:
   **
@@ -82,7 +84,7 @@ static void attachFunc(
   */
   if( db->nDb>=MAX_ATTACHED+2 ){
     sqlite3_snprintf(
-      127, zErr, "too many attached databases - max %d", MAX_ATTACHED
+      sizeof(zErr), zErr, "too many attached databases - max %d", MAX_ATTACHED
     );
     goto attach_error;
   }
@@ -92,8 +94,8 @@ static void attachFunc(
   }
   for(i=0; i<db->nDb; i++){
     char *z = db->aDb[i].zName;
-    if( z && sqlite3StrICmp(z, zName)==0 ){
-      sqlite3_snprintf(127, zErr, "database %s is already in use", zName);
+    if( z && zName && sqlite3StrICmp(z, zName)==0 ){
+      sqlite3_snprintf(sizeof(zErr), zErr, "database %s is already in use", zName);
       goto attach_error;
     }
   }
@@ -187,9 +189,9 @@ static void attachFunc(
     db->nDb = iDb;
     if( rc==SQLITE_NOMEM ){
       if( !sqlite3MallocFailed() ) sqlite3FailedMalloc();
-      sqlite3_snprintf(127, zErr, "out of memory");
+      sqlite3_snprintf(sizeof(zErr),zErr, "out of memory");
     }else{
-      sqlite3_snprintf(127, zErr, "unable to open database: %s", zFile);
+      sqlite3_snprintf(sizeof(zErr),zErr, "unable to open database: %s", zFile);
     }
     goto attach_error;
   }
@@ -226,7 +228,7 @@ static void detachFunc(
   Db *pDb = 0;
   char zErr[128];
 
-  assert(zName);
+  if( zName==0 ) zName = "";
   for(i=0; i<db->nDb; i++){
     pDb = &db->aDb[i];
     if( pDb->pBt==0 ) continue;
@@ -234,11 +236,11 @@ static void detachFunc(
   }
 
   if( i>=db->nDb ){
-    sqlite3_snprintf(sizeof(zErr), zErr, "no such database: %s", zName);
+    sqlite3_snprintf(sizeof(zErr),zErr, "no such database: %s", zName);
     goto detach_error;
   }
   if( i<2 ){
-    sqlite3_snprintf(sizeof(zErr), zErr, "cannot detach database %s", zName);
+    sqlite3_snprintf(sizeof(zErr),zErr, "cannot detach database %s", zName);
     goto detach_error;
   }
   if( !db->autoCommit ){
diff --git a/test/attach3.test b/test/attach3.test
index 6caf14e13f..141d52c2d7 100644
--- a/test/attach3.test
+++ b/test/attach3.test
@@ -12,7 +12,7 @@
 # focus of this script is testing the ATTACH and DETACH commands
 # and schema changes to attached databases.
 #
-# $Id: attach3.test,v 1.15 2005/03/29 03:11:00 danielk1977 Exp $
+# $Id: attach3.test,v 1.16 2006/05/25 11:52:38 drh Exp $
 #
 
 
@@ -242,4 +242,95 @@ do_test attach3-11.2 {
   }
 } {0 {}}
 
+# Return a list of attached databases
+#
+proc db_list {} {
+  set x [execsql {
+    PRAGMA database_list;
+  }]
+  set y {}
+  foreach {n id file} $x {lappend y $id}
+  return $y
+}
+
+# Ticket #1825
+#
+do_test attach3-12.1 {
+  db_list
+} {main temp aux}
+do_test attach3-12.2 {
+  execsql {
+    ATTACH DATABASE ? AS ?
+  }
+  db_list
+} {main temp aux {}}
+do_test attach3-12.3 {
+  execsql {
+    DETACH aux
+  }
+  db_list
+} {main temp {}}
+do_test attach3-12.4 {
+  execsql {
+    DETACH ?
+  }
+  db_list
+} {main temp}
+do_test attach3-12.5 {
+  execsql {
+    ATTACH DATABASE '' AS ''
+  }
+  db_list
+} {main temp {}}
+do_test attach3-12.6 {
+  execsql {
+    DETACH ''
+  }
+  db_list
+} {main temp}
+do_test attach3-12.7 {
+  execsql {
+    ATTACH DATABASE '' AS ?
+  }
+  db_list
+} {main temp {}}
+do_test attach3-12.8 {
+  execsql {
+    DETACH ''
+  }
+  db_list
+} {main temp}
+do_test attach3-12.9 {
+  execsql {
+    ATTACH DATABASE '' AS NULL
+  }
+  db_list
+} {main temp {}}
+do_test attach3-12.10 {
+  execsql {
+    DETACH ?
+  }
+  db_list
+} {main temp}
+do_test attach3-12.11 {
+  catchsql {
+    DETACH NULL
+  }
+} {1 {no such database: }}
+do_test attach3-12.12 {
+  catchsql {
+    ATTACH null AS null;
+    ATTACH '' AS '';
+  }
+} {1 {database  is already in use}}
+do_test attach3-12.13 {
+  db_list
+} {main temp {}}
+do_test attach3-12.14 {
+  execsql {
+    DETACH '';
+  }
+  db_list
+} {main temp}
+
 finish_test