From 020a30be0d9a3b56a98c4e4094d13d3b4e3bd4eb Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Sat, 26 Nov 2011 21:33:59 +0100
Subject: add magicvar command

The magicvar command gives an overview about all environment variables
with a special meaning.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 commands/Kconfig    | 14 ++++++++++++++
 commands/Makefile   |  1 +
 commands/magicvar.c | 20 ++++++++++++++++++++
 3 files changed, 35 insertions(+)
 create mode 100644 commands/magicvar.c

(limited to 'commands')

diff --git a/commands/Kconfig b/commands/Kconfig
index 18ab840916..78b9d2a0e6 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -383,6 +383,20 @@ config CMD_HELP
 	default y
 	prompt "help"
 
+config CMD_MAGICVAR
+	tristate
+	prompt "magicvar"
+	help
+	  barebox has some shell variables with special meanings. This
+	  command shows the available magic variables.
+
+config CMD_MAGICVAR_HELP
+	bool
+	prompt "display description"
+	depends on CMD_MAGICVAR
+	help
+	  Also display a description to the magic variables
+
 config CMD_DEVINFO
 	tristate
 	default y
diff --git a/commands/Makefile b/commands/Makefile
index 5c519169c3..9b3a349bd2 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -58,3 +58,4 @@ obj-$(CONFIG_CMD_LED_TRIGGER)	+= trigger.o
 obj-$(CONFIG_CMD_USB)		+= usb.o
 obj-$(CONFIG_CMD_TIME)		+= time.o
 obj-$(CONFIG_CMD_OFTREE)	+= oftree.o
+obj-$(CONFIG_CMD_MAGICVAR)	+= magicvar.o
diff --git a/commands/magicvar.c b/commands/magicvar.c
new file mode 100644
index 0000000000..31606d2afa
--- /dev/null
+++ b/commands/magicvar.c
@@ -0,0 +1,20 @@
+#include <common.h>
+#include <command.h>
+#include <magicvar.h>
+
+static int do_magicvar(struct command *cmdtp, int argc, char *argv[])
+{
+	struct magicvar *m;
+
+	for (m = &__barebox_magicvar_start;
+			m != &__barebox_magicvar_end;
+			m++)
+		printf("%-32s %s\n", m->name, m->description);
+
+	return 0;
+}
+
+BAREBOX_CMD_START(magicvar)
+	.cmd		= do_magicvar,
+	.usage		= "List information about magic variables",
+BAREBOX_CMD_END
-- 
cgit v1.2.3


From f84fb129c703a682e37ba05f1ba2ea2b567a14d8 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Sun, 27 Nov 2011 13:02:48 +0100
Subject: bootm: Add bootargs magicvar

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 commands/bootm.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'commands')

diff --git a/commands/bootm.c b/commands/bootm.c
index f11138afba..ada790ee97 100644
--- a/commands/bootm.c
+++ b/commands/bootm.c
@@ -42,6 +42,7 @@
 #include <boot.h>
 #include <rtc.h>
 #include <init.h>
+#include <magicvar.h>
 #include <asm-generic/memory_layout.h>
 
 /*
@@ -367,6 +368,8 @@ BAREBOX_CMD_START(bootm)
 	BAREBOX_CMD_HELP(cmd_bootm_help)
 BAREBOX_CMD_END
 
+BAREBOX_MAGICVAR(bootargs, "Linux Kernel parameters");
+
 /**
  * @page bootm_command
 
-- 
cgit v1.2.3