ADDED   ext/ota/ota.c
Index: ext/ota/ota.c
==================================================================
--- /dev/null
+++ ext/ota/ota.c
@@ -0,0 +1,92 @@
+/*
+** 2014 August 30
+**
+** 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 contains a command-line application that uses the OTA 
+** extension. See the usage() function below for an explanation.
+*/
+
+#include "sqlite3ota.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+** Print a usage message and exit.
+*/
+void usage(const char *zArgv0){
+  fprintf(stderr, 
+"Usage: %s [-step NSTEP] TARGET-DB OTA-DB\n"
+"\n"
+"  Argument OTA-DB must be an OTA database containing an update suitable for\n"
+"  target database TARGET-DB. If NSTEP is set to less than or equal to zero\n"
+"  (the default value), this program attempts to apply the entire update to\n"
+"  the target database.\n"
+"\n"
+"  If NSTEP is greater than zero, then a maximum of NSTEP calls are made\n"
+"  to sqlite3ota_step(). If the OTA update has not been completely applied\n"
+"  after the NSTEP'th call is made, the state is saved in the database OTA-DB\n"
+"  and the program exits. Subsequent invocations of this (or any other OTA)\n"
+"  application will use this state to resume applying the OTA update to the\n"
+"  target db.\n"
+"\n"
+, zArgv0);
+  exit(1);
+}
+
+int main(int argc, char **argv){
+  int i;
+  const char *zTarget;            /* Target database to apply OTA to */
+  const char *zOta;               /* Database containing OTA */
+  char *zErrmsg;                  /* Error message, if any */
+  sqlite3ota *pOta;               /* OTA handle */
+  int nStep = 0;                  /* Maximum number of step() calls */
+  int rc;
+
+  /* Process command line arguments. Following this block local variables 
+  ** zTarget, zOta and nStep are all set. */
+  if( argc==5 ){
+    int nArg1 = strlen(argv[1]);
+    if( nArg1>5 || nArg1<2 || memcmp("-step", argv[1], nArg1) ) usage(argv[0]);
+    nStep = atoi(argv[2]);
+  }else if( argc!=3 ){
+    usage(argv[0]);
+  }
+  zTarget = argv[argc-2];
+  zOta = argv[argc-1];
+
+  /* Open an OTA handle. If nStep is less than or equal to zero, call
+  ** sqlite3ota_step() until either the OTA has been completely applied
+  ** or an error occurs. Or, if nStep is greater than zero, call
+  ** sqlite3ota_step() a maximum of nStep times.  */
+  pOta = sqlite3ota_open(zTarget, zOta);
+  for(i=0; (nStep<=0 || i<nStep) && sqlite3ota_step(pOta)==SQLITE_OK; i++);
+  rc = sqlite3ota_close(pOta, &zErrmsg);
+
+  /* Let the user know what happened. */
+  switch( rc ){
+    case SQLITE_OK:
+      fprintf(stdout, "SQLITE_OK: ota update incomplete\n");
+      break;
+
+    case SQLITE_DONE:
+      fprintf(stdout, "SQLITE_DONE: ota update completed\n");
+      break;
+
+    default:
+      fprintf(stderr, "error=%d: %s\n", rc, zErrmsg);
+      break;
+  }
+
+  sqlite3_free(zErrmsg);
+  return (rc==SQLITE_OK || rc==SQLITE_DONE) ? 0 : 1;
+}
+

Index: ext/ota/sqlite3ota.h
==================================================================
--- ext/ota/sqlite3ota.h
+++ ext/ota/sqlite3ota.h
@@ -105,11 +105,11 @@
 ** with the "ota_control" column set to contain integer value 1. The
 ** real primary key values of the row to delete should be stored in the
 ** corresponding columns of the data_% table. The values stored in the
 ** other columns are not used.
 **
-** For each row to DELETE from the target database as part of the OTA 
+** For each row to UPDATE from the target database as part of the OTA 
 ** update, the corresponding data_% table should contain a single record
 ** with the "ota_control" column set to contain a value of type text.
 ** The real primary key values identifying the row to update should be 
 ** stored in the corresponding columns of the data_% table row, as should
 ** the new values of all columns being update. The text value in the 
@@ -160,10 +160,12 @@
 ** with the prefix "ota_"
 */
 
 #ifndef _SQLITE3OTA_H
 #define _SQLITE3OTA_H
+
+#include <sqlite3.h>              /* Required for error code definitions */
 
 typedef struct sqlite3ota sqlite3ota;
 
 /*
 ** Open an OTA handle.

Index: main.mk
==================================================================
--- main.mk
+++ main.mk
@@ -662,10 +662,15 @@
 	$(TCC) -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION -o wordcount$(EXE) \
 		$(TOP)/test/wordcount.c sqlite3.c
 
 speedtest1$(EXE):	$(TOP)/test/speedtest1.c sqlite3.o
 	$(TCC) -I. -o speedtest1$(EXE) $(TOP)/test/speedtest1.c sqlite3.o $(THREADLIB)
+
+ota$(EXE): $(TOP)/ext/ota/ota.c $(TOP)/ext/ota/sqlite3ota.c sqlite3.o 
+	$(TCC) -I. -o ota$(EXE) \
+	  $(TOP)/ext/ota/ota.c $(TOP)/ext/ota/sqlite3ota.c sqlite3.o \
+	  $(THREADLIB)
 
 # This target will fail if the SQLite amalgamation contains any exported
 # symbols that do not begin with "sqlite3_". It is run as part of the
 # releasetest.tcl script.
 #