>From f246d20074c84166d1064be4428c638ae54bceae Mon Sep 17 00:00:00 2001
From: magnum <john.magnum@hushmail.com>
Date: Thu, 10 May 2012 21:37:27 +0200
Subject: [PATCH] New (hidden) options: --list=[inc-modes|rules|externals]

---
 src/config.c  |   17 +++++++++++++++++
 src/config.h  |    6 ++++++
 src/john.c    |   16 ++++++++++++++++
 src/options.c |    5 ++++-
 src/options.h |    2 ++
 5 files changed, 45 insertions(+), 1 deletions(-)

diff --git a/src/config.c b/src/config.c
index c95ef46..e38066c 100644
--- a/src/config.c
+++ b/src/config.c
@@ -195,6 +195,23 @@ struct cfg_list *cfg_get_list(char *section, char *subsection)
 	return NULL;
 }
 
+void cfg_print_subsections(char *section)
+{
+	struct cfg_section *current;
+	char *p1, *p2;
+
+	if ((current = cfg_database))
+	do {
+		p1 = current->name; p2 = section;
+		while (*p1 && *p1 == tolower((int)(unsigned char)*p2)) {
+			p1++; p2++;
+		}
+		if (*p1++ != ':') continue;
+		if (!*p1 || *p2) continue;
+		printf("%s\n", p1);
+	} while ((current = current->next));
+}
+
 char *cfg_get_param(char *section, char *subsection, char *param)
 {
 	struct cfg_section *current_section;
diff --git a/src/config.h b/src/config.h
index e0e30e5..de6fcf8 100644
--- a/src/config.h
+++ b/src/config.h
@@ -64,6 +64,12 @@ extern void cfg_init(char *name, int allow_missing);
 extern struct cfg_list *cfg_get_list(char *section, char *subsection);
 
 /*
+ * Searches for sections with the supplied name, and prints a list of
+ * valid subsections.
+ */
+void cfg_print_subsections(char *section);
+
+/*
  * Searches for a section with the supplied name and a parameter within the
  * section, and returns the parameter's value, or NULL if not found.
  */
diff --git a/src/john.c b/src/john.c
index fe98bb2..291a109 100644
--- a/src/john.c
+++ b/src/john.c
@@ -556,6 +556,22 @@ static void john_init(char *name, int argc, char **argv)
 		exit(0);
 	}
 
+	if (options.listconf && !strcasecmp(options.listconf, "inc-modes"))
+	{
+		cfg_print_subsections("Incremental");
+		exit(0);
+	}
+	if (options.listconf && !strcasecmp(options.listconf, "rules"))
+	{
+		cfg_print_subsections("List.Rules");
+		exit(0);
+	}
+	if (options.listconf && !strcasecmp(options.listconf, "externals"))
+	{
+		cfg_print_subsections("List.External");
+		exit(0);
+	}
+
 	initUnicode(UNICODE_UNICODE); /* Init the unicode system */
 
 	john_register_all(); /* maybe restricted to one format by options */
diff --git a/src/options.c b/src/options.c
index e1261a1..fc52df8 100644
--- a/src/options.c
+++ b/src/options.c
@@ -114,6 +114,8 @@ static struct opt_entry opt_list[] = {
 	{"subformat", FLG_NONE, FLG_NONE,
 		0, FLG_STDOUT | OPT_REQ_PARAM,
 		OPT_FMT_STR_ALLOC, &options.subformat},
+	{"list", FLG_NONE, FLG_NONE, 0, FLG_STDOUT | OPT_REQ_PARAM,
+		OPT_FMT_STR_ALLOC, &options.listconf},
 #ifdef HAVE_DL
 	{"plugin", FLG_DYNFMT, 0, 0, OPT_REQ_PARAM,
 		OPT_FMT_ADD_LIST_MULTI,	&options.fmt_dlls},
@@ -403,7 +405,8 @@ void opt_init(char *name, int argc, char **argv)
 		exit(0);
 	}
 
-	if (!(options.subformat && !strcasecmp(options.subformat, "list")))
+	if (!(options.subformat && !strcasecmp(options.subformat, "list")) &&
+	    (!options.listconf))
 	if ((options.flags & (FLG_PASSWD | FLG_PWD_REQ)) == FLG_PWD_REQ) {
 #ifdef HAVE_MPI
 		if (mpi_id == 0)
diff --git a/src/options.h b/src/options.h
index c3c7dcf..26b944d 100644
--- a/src/options.h
+++ b/src/options.h
@@ -204,6 +204,8 @@ struct options_main {
 #elif defined(HAVE_CUDA)
 	char *ocl_device;
 #endif
+/* -list=WHAT Get a config list (eg. a list of incremental modes available) */
+	char *listconf;
 };
 
 extern struct options_main options;
-- 
1.7.5.4