Update the [showdb] program so that the database file is read directly (bypassing the SQLite VFS) only if the --raw option is specified. Otherwise, it is read using the default VFS. An alternative VFS may be specified by specifying the database file to open using the URI syntax.

FossilOrigin-Name: 9699e9bd9a0e813d04c9d37422920670697c46ed

manifest

@@ -1,5 +1,5 @@
-C Add\sthe\s"--uri"\soption\sto\sutility\sprogram\s"showdb".\sThis\soption\scauses\sshowdb\sto\suse\ssqlite\swith\sthe\sSQLITE_OPEN_URI\soption\sto\sopen\sthe\sdatabase\sfile,\sinstead\sof\sopening\sit\sdirectly\susing\sthe\sOS\sopen()\sfunction.
+C Update\sthe\s[showdb]\sprogram\sso\sthat\sthe\sdatabase\sfile\sis\sread\sdirectly\s(bypassing\sthe\sSQLite\sVFS)\sonly\sif\sthe\s--raw\soption\sis\sspecified.\sOtherwise,\sit\sis\sread\susing\sthe\sdefault\sVFS.\sAn\salternative\sVFS\smay\sbe\sspecified\sby\sspecifying\sthe\sdatabase\sfile\sto\sopen\susing\sthe\sURI\ssyntax.
-D 2015-08-03T17:03:31.462
+D 2015-08-04T15:23:49.470
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 4de3ef40c8b3b75c0c55ff4242a43c8ce1ad90ee
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -1343,7 +1343,7 @@ F tool/opcodeDoc.awk b3a2a3d5d3075b8bd90b7afe24283efdd586659c
 F tool/pagesig.c ff0ca355fd3c2398e933da5e22439bbff89b803b
 F tool/restore_jrnl.tcl 6957a34f8f1f0f8285e07536225ec3b292a9024a
 F tool/rollback-test.c 9fc98427d1e23e84429d7e6d07d9094fbdec65a5
-F tool/showdb.c 8b65966a80f30b95d3dcd9d7c13caaeb4dc21473
+F tool/showdb.c 95ed172060f91dd881c65f3906cbb8a43861f3ac
 F tool/showjournal.c 053eb1cc774710c6890b7dd6293300cc297b16a5
 F tool/showlocks.c 9920bcc64f58378ff1118caead34147201f48c68
 F tool/showstat4.c 9515faa8ec176599d4a8288293ba8ec61f7b728a
@@ -1368,10 +1368,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 70b57dafb3216feb21091883196831fa1252e7bf
+P 90e34d5119f720496e86a3a6de7771ea87b7dcbb
-R 16122b1df3219db3f18abec519d4455c
+R 9d7c9f8de5d6d6fb5bb80e2cb324c919
-T *branch * showdb-uri-option
-T *sym-showdb-uri-option *
-T -sym-trunk *
 U dan
-Z 0bf8c605dcc175d4e077bbfb11ad015a
+Z dbdc532b6b382833636acb3f205bead9

manifest.uuid

@@ -1 +1 @@
-90e34d5119f720496e86a3a6de7771ea87b7dcbb
+9699e9bd9a0e813d04c9d37422920670697c46ed

tool/showdb.c

@@ -24,8 +24,7 @@ static struct GlobalData {
   int dbfd;                       /* File descriptor for reading the DB */
   int mxPage;                     /* Last page number */
   int perLine;                    /* HEX elements to print per line */
-
+  int bRaw;                       /* True to access db file via OS APIs */
-  int bUri;                       /* True for URI mode */
   sqlite3_file *pFd;              /* File descriptor for URI mode */
   sqlite3 *pDb;                   /* Database handle that owns pFd */
 } g = {1024, -1, 0, 16,   0, 0, 0};
@@ -97,7 +96,7 @@ static sqlite3 *openDatabase(const char *zPrg, const char *zName){
 */
 static void fileOpen(const char *zPrg, const char *zName){
   assert( g.dbfd<0 );
-  if( g.bUri ){
+  if( g.bRaw==0 ){
     int rc;
     void *pArg = (void *)(&g.pFd);
     g.pDb = openDatabase(zPrg, zName);
@@ -121,7 +120,7 @@ static void fileOpen(const char *zPrg, const char *zName){
 ** Close the database file opened by fileOpen()
 */
 static void fileClose(){
-  if( g.bUri ){
+  if( g.bRaw==0 ){
     sqlite3_close(g.pDb);
     g.pDb = 0;
     g.pFd = 0;
@@ -143,7 +142,7 @@ static unsigned char *fileRead(sqlite3_int64 ofst, int nByte){
   aData = sqlite3_malloc(nByte+32);
   if( aData==0 ) out_of_memory();
   memset(aData, 0, nByte+32);
-  if( g.bUri ){
+  if( g.bRaw==0 ){
     int rc = g.pFd->pMethods->xRead(g.pFd, (void*)aData, nByte, ofst);
     if( rc!=SQLITE_OK && rc!=SQLITE_IOERR_SHORT_READ ){
       fprintf(stderr, "error in xRead() - %d\n", rc);
@@ -162,7 +161,7 @@ static unsigned char *fileRead(sqlite3_int64 ofst, int nByte){
 */
 static sqlite3_int64 fileGetsize(void){
   sqlite3_int64 res = 0;
-  if( g.bUri ){
+  if( g.bRaw==0 ){
     int rc = g.pFd->pMethods->xFileSize(g.pFd, &res);
     if( rc!=SQLITE_OK ){
       fprintf(stderr, "error in xFileSize() - %d\n", rc);
@@ -1048,7 +1047,7 @@ static void usage(const char *argv0){
   fprintf(stderr, "Usage %s ?--uri? FILENAME ?args...?\n\n", argv0);
   fprintf(stderr,
     "switches:\n"
-    "    --uri           FILENAME is a URI\n"
+    "    --raw           Read db file directly, bypassing SQLite VFS\n"
     "args:\n"
     "    dbheader        Show database header\n"
     "    pgidx           Index of how each page is used\n"
@@ -1074,10 +1073,10 @@ int main(int argc, char **argv){
 
   /* Check for the "--uri" or "-uri" switch. */
   if( nArg>1 ){
-    if( sqlite3_stricmp("-uri", azArg[1])==0 
+    if( sqlite3_stricmp("-raw", azArg[1])==0 
-     || sqlite3_stricmp("--uri", azArg[1])==0
+     || sqlite3_stricmp("--raw", azArg[1])==0
     ){
-      g.bUri = 1;
+      g.bRaw = 1;
       azArg++;
       nArg--;
     }
@@ -1088,7 +1087,7 @@ int main(int argc, char **argv){
     exit(1);
   }
 
-  fileOpen(azArg[0], azArg[1]);
+  fileOpen(zPrg, azArg[1]);
   szFile = fileGetsize();
 
   zPgSz = fileRead(16, 2);
@@ -1121,11 +1120,11 @@ int main(int argc, char **argv){
         continue;
       }
       if( strcmp(azArg[i], "help")==0 ){
-        usage(azArg[0]);
+        usage(zPrg);
         continue;
       }
       if( !isdigit(azArg[i][0]) ){
-        fprintf(stderr, "%s: unknown option: [%s]\n", azArg[0], azArg[i]);
+        fprintf(stderr, "%s: unknown option: [%s]\n", zPrg, azArg[i]);
         continue;
       }
       iStart = strtol(azArg[i], &zLeft, 0);