Index: src/bin/dd/args.c
===================================================================
RCS file: /home/ncvs/src/bin/dd/args.c,v
retrieving revision 1.27
diff -u -r1.27 args.c
--- src/bin/dd/args.c	2000/10/22 23:00:32	1.27
+++ src/bin/dd/args.c	2001/06/21 08:58:45
@@ -298,7 +298,9 @@
 	{ "ibm",	C_EBCDIC,	C_ASCII,	a2ibm_POSIX },
 	{ "lcase",	C_LCASE,	C_UCASE,	NULL },
 	{ "noerror",	C_NOERROR,	0,		NULL },
+	{ "noread",	C_NOREAD,	0,		NULL },
 	{ "notrunc",	C_NOTRUNC,	0,		NULL },
+	{ "nowrite",	C_NOWRITE,	0,		NULL },
 	{ "oldascii",	C_ASCII,	C_EBCDIC,	e2a_32V },
 	{ "oldebcdic",	C_EBCDIC,	C_ASCII,	a2e_32V },
 	{ "oldibm",	C_EBCDIC,	C_ASCII,	a2ibm_32V },
Index: src/bin/dd/dd.c
===================================================================
RCS file: /home/ncvs/src/bin/dd/dd.c,v
retrieving revision 1.31
diff -u -r1.31 dd.c
--- src/bin/dd/dd.c	2000/10/10 01:48:22	1.31
+++ src/bin/dd/dd.c	2001/06/21 08:58:45
@@ -273,10 +273,14 @@
 				memset(in.dbp, 0, in.dbsz);
 		}
 
-		n = read(in.fd, in.dbp, in.dbsz);
-		if (n == 0) {
-			in.dbrcnt = 0;
-			return;
+		if (!(ddflags & C_NOREAD)) {
+			n = read(in.fd, in.dbp, in.dbsz);
+			if (n == 0) {
+				in.dbrcnt = 0;
+				return;
+			}
+		} else {
+			n = in.dbsz;
 		}
 
 		/* Read error. */
@@ -422,13 +426,18 @@
 						err(2, "%s: seek error creating sparse file",
 						    out.name);
 					if (force)
-						write(out.fd, outp, 1);
+						if (!(ddflags & C_NOWRITE))
+							write(out.fd, outp, 1);
 					pending = 0;
 				}
-				if (cnt)
-					nw = write(out.fd, outp, cnt);
-				else
+				if (cnt) {
+					if (!(ddflags & C_NOWRITE))
+						nw = write(out.fd, outp, cnt);
+					else
+						nw = cnt;
+				} else {
 					return;
+				}
 			}
 
 			if (nw <= 0) {
Index: src/bin/dd/dd.h
===================================================================
RCS file: /home/ncvs/src/bin/dd/dd.h,v
retrieving revision 1.16
diff -u -r1.16 dd.h
--- src/bin/dd/dd.h	2000/07/01 05:36:25	1.16
+++ src/bin/dd/dd.h	2001/06/21 08:58:45
@@ -99,3 +99,5 @@
 #define	C_UNBLOCK	0x80000
 #define	C_OSYNC		0x100000
 #define	C_SPARSE	0x200000
+#define C_NOREAD	0x400000
+#define C_NOWRITE	0x800000