Add '-C' "Canonical" format to hexdump:

$ hexdump -C /etc/resolv.conf
00000000 64 6f 6d 61 69 6e 20 64 6b 2e 74 66 73 2e 63 6f |domain dk.tfs.co|
00000010 6d 0a 6e 61 6d 65 73 65 72 76 65 72 20 31 34 30 |m.nameserver 140|
00000020 2e 31 34 35 2e 32 33 30 2e 31 30 0a             |.145.230.10.|

2 files changed, 12 insertions, 2 deletions

diff --git a/usr.bin/hexdump/hexdump.1 b/usr.bin/hexdump/hexdump.1
index 321151e..563edac 100644
--- a/usr.bin/hexdump/hexdump.1
+++ b/usr.bin/hexdump/hexdump.1
@@ -39,7 +39,7 @@
 .Nd ascii, decimal, hexadecimal, octal dump
 .Sh SYNOPSIS
 .Nm hexdump
-.Op Fl bcdovx
+.Op Fl bcCdovx
 .Op Fl e Ar format_string
 .Op Fl f Ar format_file
 .Op Fl n Ar length
@@ -64,6 +64,11 @@ in octal, per line.
 Display the input offset in hexadecimal, followed by sixteen
 space-separated, three column, space-filled, characters of input
 data per line.
+.It Fl C
+.Em Canonical hex+ASCII display.
+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.
 .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 68abbe6..829a6303f 100644
--- a/usr.bin/hexdump/hexsyntax.c
+++ b/usr.bin/hexdump/hexsyntax.c
@@ -56,7 +56,7 @@ newsyntax(argc, argvp)
 	char *p, **argv;
 
 	argv = *argvp;
-	while ((ch = getopt(argc, argv, "bcde:f:n:os:vx")) != EOF)
+	while ((ch = getopt(argc, argv, "bcCde:f:n:os:vx")) != EOF)
 		switch (ch) {
 		case 'b':
 			add("\"%07.7_Ax\n\"");
@@ -66,6 +66,11 @@ newsyntax(argc, argvp)
 			add("\"%07.7_Ax\n\"");
 			add("\"%07.7_ax \" 16/1 \"%3_c \" \"\\n\"");
 			break;
+		case 'C':
+			add("\"%08.8_Ax\n\"");
+			add("\"%08.8_ax \" 16/1 \"%02x \" ");
+			add("\" |\" 16/1 \"%_p\" \"|\\n\"");
+			break;
 		case 'd':
 			add("\"%07.7_Ax\n\"");
 			add("\"%07.7_ax \" 8/2 \"  %05u \" \"\\n\"");