[PATCH 3/9] intoduce dmesg to print the barebox output ring buffer

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 commands/Kconfig |    6 ++++++
 common/console.c |   20 ++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/commands/Kconfig b/commands/Kconfig
index ac9b797..55a9840 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -115,6 +115,12 @@ config CMD_TIME
 	  checking for ctrl-c, so the time command can be used with commands
 	  which are interruptible with ctrl-c.
 
+config CMD_DMESG
+	bool "dmesg"
+	depends on CONSOLE_FULL
+	  help
+	  print the barebox output ring buffer
+
 config CMD_LINUX_EXEC
 	bool "linux exec"
 	depends on LINUX
diff --git a/common/console.c b/common/console.c
index 96e1396..2d2d20a 100644
--- a/common/console.c
+++ b/common/console.c
@@ -434,3 +434,23 @@ int ctrlc (void)
 }
 EXPORT_SYMBOL(ctrlc);
 #endif /* ARCH_HAS_CTRC */
+
+#include <command.h>
+#include <complete.h>
+
+static int do_dmesg(int argc, char *argv[])
+{
+	kfifo_dump_str(console_output_fifo, console_output_dump);
+
+	return 0;
+}
+
+static const __maybe_unused char cmd_dmesg_help[] =
+"print the barebox output ring buffer\n";
+
+BAREBOX_CMD_START(dmesg)
+	.cmd		= do_dmesg,
+	.usage		= "dmesg",
+	BAREBOX_CMD_HELP(cmd_dmesg_help)
+	BAREBOX_CMD_COMPLETE(empty_complete)
+BAREBOX_CMD_END
-- 
1.7.10.4


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