Improved the user interface:

1) Added file list capability via '?'.
2) Arranged usage info to be more unix-like.
3) Fixed backspace over prompt annoyance.

sys/i386/boot/biosboot/boot.c

@@ -24,7 +24,7 @@
  * the rights to redistribute these changes.
  *
  *	from: Mach, [92/04/03  16:51:14  rvb]
- *	$Id: boot.c,v 1.20 1994/10/26 20:46:05 jkh Exp $
+ *	$Id: boot.c,v 1.21 1994/10/31 18:00:06 jkh Exp $
  */
 
 
@@ -69,14 +69,17 @@ extern int end;
 boot(drive)
 int drive;
 {
-	int loadflags, currname = 0;
+	int loadflags, currname = 0, ret;
 	char *t;
 		
 	printf("\n>> FreeBSD BOOT @ 0x%x: %d/%d k of memory\n",
 		ouraddr,
 		memsize(0),
 		memsize(1));
-	printf("use hd(1,a)/kernel to boot sd0 when wd0 is also installed\n");
+	printf("Use hd(1,a)/kernel to boot sd0 when wd0 is also installed.\n");
+	printf("Usage: [[[%s(0,a)]%s][-s][-r][-a][-c][-d][-b]]\nUse ? for file list.\n\n"
+			, devs[(drive & 0x80) ? 0 : 2]
+			, names[0]);
 	gateA20();
 loadstart:
 	/***************************************************************\
@@ -90,9 +93,12 @@ int drive;
 	loadflags = 0;
 	if (currname == NUMNAMES)
 		currname = 0;
+	printf("Boot: ");
 	getbootdev(&loadflags);
-	if (openrd()) {
+	ret = openrd();
-		printf("Can't find %s\n", name);
+	if (ret != 0) {
+		if (ret > 0)
+			printf("Can't find %s\n", name);
 		goto loadstart;
 	}
 /*	if (inode.i_mode&IEXEC)
@@ -240,11 +246,6 @@ getbootdev(howto)
      int *howto;
 {
 	char c, *ptr = namebuf;
-	printf("Boot: [[[%s(%d,%c)]%s][-s][-r][-a][-c][-d][-b]] :- "
-			, devs[maj]
-			, unit
-			, 'a'+part
-			, name);
 	if (gets(namebuf)) {
 		while (c=*ptr) {
 			while (c==' ')

sys/i386/boot/biosboot/io.c

@@ -25,7 +25,7 @@
  * the rights to redistribute these changes.
  *
  *	from: Mach, Revision 2.2  92/04/04  11:35:57  rpd
- *	$Id: io.c,v 1.8 1994/09/18 07:39:55 swallace Exp $
+ *	$Id: io.c,v 1.9 1994/09/20 22:24:59 adam Exp $
  */
 
 #include <machine/cpufunc.h>
@@ -124,15 +124,21 @@ putchar(c)
 	putc(c);
 }
 
-getchar()
+getchar(in_buf)
+	int in_buf;
 {
 	int c;
 
+loop:
 	if ((c=getc()) == '\r')
 		c = '\n';
 	if (c == '\b') {
-		putchar('\b');
+		if (in_buf != 0) {
-		putchar(' ');
+			putchar('\b');
+			putchar(' ');
+		} else {
+			goto loop;
+		}
 	}
 	putchar(c);
 	return(c);
@@ -169,7 +175,7 @@ char *buf;
 #endif
 		if (ischar())
 			for (;;)
-				switch(*ptr = getchar() & 0xff) {
+				switch(*ptr = getchar(ptr - buf) & 0xff) {
 				      case '\n':
 				      case '\r':
 					*ptr = '\0';

sys/i386/boot/biosboot/sys.c

@@ -24,7 +24,7 @@
  * the rights to redistribute these changes.
  *
  *	from: Mach, Revision 2.2  92/04/04  11:36:34  rpd
- *	$Id: sys.c,v 1.4 1994/08/21 17:47:26 paul Exp $
+ *	$Id: sys.c,v 1.5 1994/09/20 22:25:00 adam Exp $
  */
 
 #include "boot.h"
@@ -97,6 +97,10 @@ find(path)
 	char *rest, ch;
 	int block, off, loc, ino = ROOTINO;
 	struct direct *dp;
+	int list_only = 0;
+
+	if (strcmp("?", path) == 0)
+		list_only = 1;
 loop:	iodest = iobuf;
 	cnt = fs->fs_bsize;
 	bnum = fsbtodb(fs,ino_to_fsba(fs,ino)) + boff;
@@ -114,8 +118,14 @@ loop:	iodest = iobuf;
 	*rest = 0;
 	loc = 0;
 	do {
-		if (loc >= inode.i_size)
+		if (loc >= inode.i_size) {
-			return 0;
+			if (list_only) {
+				printf("\n");
+				return -1;
+			} else {
+				return 0;
+			}
+		}
 		if (!(off = blkoff(fs, loc))) {
 			block = lblkno(fs, loc);
 			cnt = blksize(fs, &inode, block);
@@ -125,6 +135,8 @@ loop:	iodest = iobuf;
 		}
 		dp = (struct direct *)(iodest + off);
 		loc += dp->d_reclen;
+		if (dp->d_ino && list_only)
+			printf("%s ", dp->d_name);
 	} while (!dp->d_ino || strcmp(path, dp->d_name));
 	ino = dp->d_ino;
 	*(path = rest) = ch;
@@ -151,6 +163,7 @@ block_map(file_block)
 openrd()
 {
 	char **devp, *cp = name;
+	int ret;
 	/*******************************************************\
 	* If bracket given look for preceding device name	*
 	\*******************************************************/
@@ -232,10 +245,9 @@ openrd()
 	/***********************************************\
 	* Find the actual FILE on the mounted device	*
 	\***********************************************/
-	if (!find(cp))
+	ret = find(cp);
-	{
+	if (ret <= 0)
-		return 1;
+		return (ret == 0) ? 1 : -1;
-	}
 	poff = 0;
 	name = cp;
 	return 0;