[PATCH v2 04/13] commands: add mknod command

[Sascha Hauer <s.hauer@pengutronix.de>]

Add a mknod command. This is intended for testing/debugging purposes as
normally device special nodes are created automatically in devfs.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 commands/Kconfig  |  4 ++++
 commands/Makefile |  1 +
 commands/mknod.c  | 43 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 48 insertions(+)

diff --git a/commands/Kconfig b/commands/Kconfig
index c7c03a65477b4f083c256dc55053aab8c8ad2741..6b8e19533dc07b54c41326b84adabb1553bc415d 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -1144,6 +1144,10 @@ config CMD_MKDIR
 	  Options:
 		  -p	make parent directories as needed
 
+config CMD_MKNOD
+	tristate
+	prompt "mknod"
+
 config CMD_PWD
 	tristate
 	default y
diff --git a/commands/Makefile b/commands/Makefile
index 8fffac8fd4428d275f86c5ad9898fed96c5b18ac..356957cab56bd97f80dbac67a3e17c333d4be45c 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_CMD_CD)		+= cd.o
 obj-$(CONFIG_CMD_PWD)		+= pwd.o
 obj-$(CONFIG_CMD_MKDIR)		+= mkdir.o
 obj-$(CONFIG_CMD_RMDIR)		+= rmdir.o
+obj-$(CONFIG_CMD_MKNOD)		+= mknod.o
 obj-$(CONFIG_CMD_CP)		+= cp.o
 obj-$(CONFIG_CMD_RM)		+= rm.o
 obj-$(CONFIG_CMD_CAT)		+= cat.o
diff --git a/commands/mknod.c b/commands/mknod.c
new file mode 100644
index 0000000000000000000000000000000000000000..e99078995f995f54ba1d06587fc3d27e09f79e3b
--- /dev/null
+++ b/commands/mknod.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <command.h>
+#include <fs.h>
+
+static int do_mknod(int argc, char *argv[])
+{
+	const char *filename, *cdevname;
+	umode_t mode;
+
+	if (argc < 4)
+		return COMMAND_ERROR_USAGE;
+
+	filename = argv[1];
+	if (!strcmp(argv[2], "b"))
+		mode = S_IFBLK;
+	else if (!strcmp(argv[2], "c"))
+		mode = S_IFCHR;
+	else
+		return COMMAND_ERROR_USAGE;
+
+	cdevname = argv[3];
+
+	return mknod(filename, mode, cdevname);
+}
+
+BAREBOX_CMD_HELP_START(mknod)
+BAREBOX_CMD_HELP_TEXT("make a device special node.")
+BAREBOX_CMD_HELP_TEXT("")
+BAREBOX_CMD_HELP_TEXT("usage: mknod <name> c|b <cdevname>")
+BAREBOX_CMD_HELP_TEXT("")
+BAREBOX_CMD_HELP_TEXT("Create a device special node named <name> directing")
+BAREBOX_CMD_HELP_TEXT("to cdev <cdevname>. This can either be a block (b) or")
+BAREBOX_CMD_HELP_TEXT("character (c) device.")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(mknod)
+        .cmd            = do_mknod,
+        BAREBOX_CMD_DESC("make device nodes")
+        BAREBOX_CMD_OPTS("NAME TYPE CDEVNAME")
+        BAREBOX_CMD_GROUP(CMD_GRP_FILE)
+        BAREBOX_CMD_HELP(cmd_mknod_help)
+BAREBOX_CMD_END

-- 
2.47.3