--- embedtools/src/imgupd.c	2014/02/05 22:53:12	1.4
+++ embedtools/src/imgupd.c	2014/02/06 01:23:56	1.6.2.4
@@ -3,7 +3,7 @@
  *  by Michael Pounov <misho@aitbg.com>
  *
  * $Author: misho $
- * $Id: imgupd.c,v 1.4 2014/02/05 22:53:12 misho Exp $
+ * $Id: imgupd.c,v 1.6.2.4 2014/02/06 01:23:56 misho Exp $
  *
  *************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -47,7 +47,7 @@ SUCH DAMAGE.
 
 
 char imgName[PATH_MAX], imgFile[PATH_MAX];
-off_t imgSize, iSize;
+off_t imgSize, iSize, fromBegin;
 int Verbose, bufSize = IMGBUF_SIZE;
 extern char compiled[], compiledby[], compilehost[];
 
@@ -61,6 +61,7 @@ Usage()
 		"\t-v\t\tVerbose ...\n"
 		"\t-R\t\tReboot system after complete\n"
 		"\t-p\t\tPipe suitable transfer on little chunks\n"
+		"\t-i\t\tStart fill storage from begin\n"
 		"\t-g\t\tGet image from Storage\n"
 		"\t-t\t\tTruncate Storage file name\n"
 		"\t-s <size>\tStorage size (required for stdin)\n"
@@ -77,19 +78,25 @@ EmptyStore(int img)
 
 	VERB(1) printf("Erase store %s\n", imgName);
 
-	iSize = lseek(img, 0, SEEK_END);
-	if (iSize == -1) {
-		ESYSERR(0);
-		return -1;
+	if (!fromBegin) {
+		iSize = lseek(img, 0, SEEK_END);
+		if (iSize == -1) {
+			ESYSERR(0);
+			return -1;
+		} else
+			imgSize += E_ALIGN(iSize, bufSize);
 	} else
-		imgSize += E_ALIGN(iSize, bufSize);
+		iSize ^= iSize;
 
 	memset(buf, 0, sizeof buf);
 	for (i = howmany(iSize, bufSize); i < howmany(imgSize, bufSize); i++)
-		if ((wlen = write(img, buf, sizeof buf)) == -1 || 
-				wlen != sizeof buf) {
-			EERROR(EIO, "Error at chunk %d init %d bytes, should be %u\n", 
-					i, wlen, sizeof buf);
+		if ((wlen = write(img, buf, bufSize)) == -1 || 
+				(wlen && wlen != bufSize)) {
+			if (wlen == -1)
+				ESYSERR(0);
+			else
+				EERROR(EIO, "Error at chunk %d init %d bytes, "
+						"should be %u\n", i, wlen, bufSize);
 			return -1;
 		} else
 			VERB(1) printf("+Written chunk #%d\n", i);
@@ -110,7 +117,7 @@ FillStore(int img, int fd)
 	for (j = 0, i = howmany(iSize, bufSize); i < howmany(imgSize, bufSize); 
 			i++, j++) {
 		memset(buf, 0, sizeof buf);
-		rlen = read(fd, buf, sizeof buf);
+		rlen = read(fd, buf, bufSize);
 		if (rlen == -1) {
 			ESYSERR(0);
 			return -1;
@@ -119,13 +126,13 @@ FillStore(int img, int fd)
 		else
 			VERB(1) printf("+Readed %d bytes for chunk #%d\n", rlen, j);
 
-		wlen = write(img, buf, rlen);
+		wlen = write(img, buf, bufSize);
 		if (wlen == -1) {
 			ESYSERR(0);
 			return -1;
-		} else if (!wlen || wlen != rlen) {
-			EERROR(EIO, "Readed %d bytes are not equal to written %d bytes\n", 
-					rlen, wlen);
+		} else if (wlen && wlen != bufSize) {
+			EERROR(EIO, "Error at chunk %d written %d bytes, "
+					"should be %u\n", i, wlen, bufSize);
 		} else
 			VERB(1) printf("+Written %d bytes at chunk #%d\n", wlen, i);
 	}
@@ -139,7 +146,7 @@ main(int argc, char **argv)
 	char ch, m = 0, R = 0;
 	int fd, img, tr = 0;
 
-	while ((ch = getopt(argc, argv, "hvRpgts:f:")) != -1)
+	while ((ch = getopt(argc, argv, "hvRipgts:f:")) != -1)
 		switch (ch) {
 			case 'f':
 				strlcpy(imgName, optarg, sizeof imgName);
@@ -154,12 +161,14 @@ main(int argc, char **argv)
 			case 't':
 				tr = O_TRUNC;
 				break;
-			case 'g':
-				m = 1;
-				break;
 			case 'p':
 				bufSize = IMGBUF_SIZE2;
 				break;
+			case 'g':
+				m = 1;
+			case 'i':
+				fromBegin = 1;
+				break;
 			case 'R':
 				R = 1;
 				break;
@@ -265,6 +274,7 @@ main(int argc, char **argv)
 			return 4;
 		}
 	} else {	/* GET */
+		iSize ^= iSize;
 		if (EmptyStore(fd) == -1) {
 			if (fd > 2)
 				close(fd);