--- embedtools/src/imgupd.c	2014/02/05 12:37:31	1.1
+++ embedtools/src/imgupd.c	2014/02/05 12:37:31	1.1.2.1
@@ -0,0 +1,114 @@
+#include "global.h"
+
+
+char imgName[PATH_MAX], imgFile[PATH_MAX];
+off_t imgSize, fSize, iSize;
+int Verbose;
+extern char compiled[], compiledby[], compilehost[];
+
+static void
+Usage()
+{
+
+	printf(	"IMGUPD is tool for management of images\n"
+		"=== %s === %s@%s ===\n\n"
+		"  Syntax: imgupd [options] <image_file>\n\n"
+		"\t-v\t\tVerbose ...\n"
+		"\t-s <size>\tStorage size\n"
+		"\t-f <devfile>\tStorage file name\n"
+		"\n", compiled, compiledby, compilehost);
+}
+
+static int
+EmptyStore(int img)
+{
+	register int i;
+	u_char buf[IMGBLOCK_SIZE];
+	ssize_t wlen;
+
+	memset(buf, 0, sizeof buf);
+	for (i = 0; i < howmany(imgSize, IMGBLOCK_SIZE); i++)
+		if ((wlen = write(img, buf, sizeof buf)) == -1 || 
+				wlen != sizeof buf) {
+			printf("Error:: at chunk %d init %d bytes, should be %u", 
+					i, wlen, sizeof buf);
+			return -1;
+		} else
+			VERB(1) printf("+Written chunk #%d\n", i);
+
+	iSize = lseek(img, 0, SEEK_END);
+	return iSize;
+}
+
+int
+main(int argc, char **argv)
+{
+	char ch;
+	int fd, img;
+
+	while ((ch = getopt(argc, argv, "hvs:f:")) != -1)
+		switch (ch) {
+			case 'f':
+				strlcpy(imgName, optarg, sizeof imgName);
+				break;
+			case 's':
+				imgSize = strtoll(optarg, NULL, 0);
+				if (!imgSize) {
+					Usage();
+					return 1;
+				}
+				break;
+			case 'v':
+				Verbose++;
+				break;
+			case 'h':
+			default:
+				Usage();
+				return 1;
+		}
+	argc -= optind;
+	argv += optind;
+	if (!argc || !*imgName || !imgSize) {
+		Usage();
+		return 1;
+	} else
+		strlcpy(imgFile, *argv, sizeof imgFile);
+
+	VERB(1) printf("imgSize=%llu imgName=%s imgFile=%s\n", imgSize, imgName, imgFile);
+
+	/* open image file */
+	fd = open(imgFile, O_RDONLY);
+	if (fd == -1) {
+		ESYSERR(0);
+		return 2;
+	} else
+		fSize = lseek(fd, 0, SEEK_END);
+	if (fSize == -1 || fSize > imgSize) {
+		close(fd);
+		printf("Error:: file size %llu is greater from storage size %llu\n", 
+				fSize, imgSize);
+		return 2;
+	} else
+		lseek(fd, 0, SEEK_SET);
+
+	/* open storage device */
+	img = open(imgName, O_RDWR | O_CREAT, 0644);
+	if (img == -1) {
+		ESYSERR(0);
+		close(fd);
+		return 3;
+	}
+	if (EmptyStore(img) == -1 || iSize < imgSize) {
+		close(fd);
+		close(img);
+		unlink(imgName);
+		printf("Error:: current storage size %llu is smaller from storage size %llu\n", 
+				iSize, imgSize);
+		return 3;
+	} else
+		lseek(img, 0, SEEK_SET);
+
+	close(img);
+	close(fd);
+	return 0;
+}