Now that we've already got "hexdump -C", make calling the command "hd"

having the same effect, and install a link for this.  There is
historic precedence for the command hd(1) (with roughly that output
format) in Xenix, SCO, and a few SysV's that tooks the idea.

Also, added a couple of spaces to the -C format to make the output
better readable.

Ok'ed by: phk

3 files changed, 28 insertions, 4 deletions

diff --git a/usr.bin/hexdump/Makefile b/usr.bin/hexdump/Makefile
index 1e0543b..24ad198 100644
--- a/usr.bin/hexdump/Makefile
+++ b/usr.bin/hexdump/Makefile
@@ -3,6 +3,8 @@
 PROG=	hexdump
 SRCS=	conv.c display.c hexdump.c hexsyntax.c odsyntax.c parse.c
 MAN1=	hexdump.1 od.1
+MLINKS=	hexdump.1 hd.1
 LINKS=	${BINDIR}/hexdump ${BINDIR}/od
+LINKS+=	${BINDIR}/hexdump ${BINDIR}/hd
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/hexdump/hexdump.1 b/usr.bin/hexdump/hexdump.1
index 563edac..a76d043 100644
--- a/usr.bin/hexdump/hexdump.1
+++ b/usr.bin/hexdump/hexdump.1
@@ -35,7 +35,7 @@
 .Dt HEXDUMP 1
 .Os
 .Sh NAME
-.Nm hexdump
+.Nm hexdump, hd
 .Nd ascii, decimal, hexadecimal, octal dump
 .Sh SYNOPSIS
 .Nm hexdump
@@ -47,6 +47,15 @@
 .Op Fl s Ar skip
 .Ek
 .Ar file  ...
+.Nm hd
+.Op Fl bcdovx
+.Op Fl e Ar format_string
+.Op Fl f Ar format_file
+.Op Fl n Ar length
+.Bk -words
+.Op Fl s Ar skip
+.Ek
+.Ar file  ...
 .Sh DESCRIPTION
 The hexdump utility is a filter which displays the specified files, or
 the standard input, if no files are specified, in a user specified
@@ -69,6 +78,10 @@ data per line.
 Display the input offset in hexadecimal, followed by sixteen
 space-separated, two column, hexadecimal bytes, followed by the
 same sixteen bytes in %_p format enclosed in ``|'' characters.
+.Pp
+Calling the command
+.Nm hd
+implies this option.
 .It Fl d
 .Em Two-byte decimal display.
 Display the input offset in hexadecimal, followed by eight
diff --git a/usr.bin/hexdump/hexsyntax.c b/usr.bin/hexdump/hexsyntax.c
index 829a6303f..e3bca0bc 100644
--- a/usr.bin/hexdump/hexsyntax.c
+++ b/usr.bin/hexdump/hexsyntax.c
@@ -56,6 +56,14 @@ newsyntax(argc, argvp)
 	char *p, **argv;
 
 	argv = *argvp;
+	if ((p = rindex(argv[0], 'h')) != NULL &&
+	    strcmp(p, "hd") == 0) {
+		/* "Canonical" format, implies -C. */
+		add("\"%08.8_Ax\n\"");
+		add("\"%08.8_ax  \" 8/1 \"%02x \" \"  \"");
+		add(" 8/1 \"%02x \" ");
+		add("\"  |\" 16/1 \"%_p\" \"|\\n\"");
+	}
 	while ((ch = getopt(argc, argv, "bcCde:f:n:os:vx")) != EOF)
 		switch (ch) {
 		case 'b':
@@ -68,8 +76,9 @@ newsyntax(argc, argvp)
 			break;
 		case 'C':
 			add("\"%08.8_Ax\n\"");
-			add("\"%08.8_ax \" 16/1 \"%02x \" ");
-			add("\" |\" 16/1 \"%_p\" \"|\\n\"");
+			add("\"%08.8_ax  \" 8/1 \"%02x \" \"  \"");
+			add(" 8/1 \"%02x \" ");
+			add("\"  |\" 16/1 \"%_p\" \"|\\n\"");
 			break;
 		case 'd':
 			add("\"%07.7_Ax\n\"");
@@ -127,6 +136,6 @@ void
 usage()
 {
 	(void)fprintf(stderr,
-"hexdump: [-bcdovx] [-e fmt] [-f fmt_file] [-n length] [-s skip] [file ...]\n");
+"hexdump: [-bcCdovx] [-e fmt] [-f fmt_file] [-n length] [-s skip] [file ...]\n");
 	exit(1);
 }