From 0a63c58f33dbbd93338263969434d1fbd03a3ede Mon Sep 17 00:00:00 2001
From: SchumBlubBlub <6bx0lm+7siazd414punk@sharklasers.com>
Date: Thu, 9 Feb 2017 13:28:43 +0000
Subject: [PATCH] Add detailed Cf?

---
 libr/core/cmd_meta.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/libr/core/cmd_meta.c b/libr/core/cmd_meta.c
index 1654fec691..622341fe1f 100644
--- a/libr/core/cmd_meta.c
+++ b/libr/core/cmd_meta.c
@@ -414,8 +414,21 @@ static int cmd_meta_hsdmf(RCore *core, const char *input) {
 
 	switch (input[1]) {
 	case '?':
-		eprintf ("See C?\n");
-		break;
+		switch (input[0]) {
+		case 'f':
+			r_cons_println(
+				"Usage: Cf[-] [sz] [fmt..] [@addr]\n\n"
+				"'sz' indicates the byte size taken up by struct.\n"
+				"'fmt' is a 'pf?' style format string. It controls only the display format.\n\n"
+				"You may wish to have 'sz' != sizeof(fmt) when you have a large struct\n"
+				"but have only identified specific fields in it. In that case, use 'fmt'\n"
+				"to show the fields you know about (perhaps using 'skip' fields), and 'sz'\n"
+				"to match the total struct size in mem.\n");
+			break;
+		default:
+			eprintf ("See C?\n");
+			break;
+		}
 	case '-':
 		switch (input[2]) {
 		case '*':
@@ -789,7 +802,7 @@ static int cmd_meta(void *data, const char *input) {
 				"Cz", "[@addr]", "add zero-terminated string",
 				"Ch", "[-] [size] [@addr]", "hide data",
 				"Cd", "[-] [size] [repeat] [@addr]", "hexdump data array (Cd 4 10 == dword [10])",
-				"Cf", "[-] [sz] [0|cnt][fmt..] [@addr]", "format memory (see pf?)",
+				"Cf", "[?][-] [sz] [0|cnt][fmt] [a0 a1...] [@addr]", "format memory (see pf?)",
 				"CF", "[sz] [fcn-sign..] [@addr]", "function signature",
 				"Cm", "[-] [sz] [fmt..] [@addr]", "magic parse (see pm?)",
 				NULL};