add unlzo support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 78 insertions, 0 deletions

diff --git a/commands/Kconfig b/commands/Kconfig
index bb264fc173..543ee71a20 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -300,4 +300,12 @@ config CMD_GPIO
 	  include gpio_set_value, gpio_get_value, gpio_direction_input and
 	  gpio_direction_output commands to control gpios.
 
+config CMD_UNLZO
+	bool
+	select LZO_DECOMPRESS
+	prompt "unlzo"
+	help
+	  Say yes here to get the unlzo command. lzo is a fast compression
+	  algorithm by Markus Franz Xaver Johannes Oberhumer.
+
 endmenu
diff --git a/commands/Makefile b/commands/Makefile
index b32fa05d30..74b099414f 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -47,3 +47,4 @@ obj-$(CONFIG_CMD_INSMOD)	+= insmod.o
 obj-$(CONFIG_CMD_BMP)		+= bmp.o
 obj-$(CONFIG_USB_GADGET_DFU)	+= dfu.o
 obj-$(CONFIG_CMD_GPIO)		+= gpio.o
+obj-$(CONFIG_CMD_UNLZO)		+= unlzo.o
diff --git a/commands/unlzo.c b/commands/unlzo.c
new file mode 100644
index 0000000000..0b6dd4b961
--- /dev/null
+++ b/commands/unlzo.c
@@ -0,0 +1,69 @@
+/*
+ * unlzo.c - uncompress a lzo compressed file
+ *
+ * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fs.h>
+#include <lzo.h>
+
+static int do_unlzo(struct command *cmdtp, int argc, char *argv[])
+{
+	int from, to, ret, retlen;
+
+	if (argc != 3)
+		return COMMAND_ERROR_USAGE;
+
+	from = open(argv[1], O_RDONLY);
+	if (from < 0) {
+		perror("open");
+		return 1;
+	}
+
+	to = open(argv[2], O_WRONLY | O_CREAT);
+	if (to < 0) {
+		perror("open");
+		ret = 1;
+		goto exit_close;
+	}
+
+	ret = unlzo(from, to, &retlen);
+	if (ret)
+		printf("failed to decompress\n");
+
+	close(to);
+exit_close:
+	close(from);
+	return ret;
+}
+
+static const __maybe_unused char cmd_unlzo_help[] =
+"Usage: unlzo <infile> <outfile>\n"
+"Uncompress a lzo compressed file\n";
+
+BAREBOX_CMD_START(unlzo)
+        .cmd            = do_unlzo,
+        .usage          = "lzop <infile> <outfile>",
+        BAREBOX_CMD_HELP(cmd_unlzo_help)
+BAREBOX_CMD_END
+