[Buildroot] [PATCH 1/1] Customize device creation
Yegor Yefremov
yegor_sub1 at visionsystems.de
Tue Sep 14 10:07:19 UTC 2010
Create menu entry to select device creation method:
- static method uses device table as before
- devtmpfs method enables this feature in kernel
- mdev method adds mdev starting script to the file system
and selects mdev itself for installation
- udev method selects udev for installation
All dynamic methods are base on devtmpfs, so one doesn't
need to care about /dev folder.
Signed-off-by: Yegor Yefremov <yegorslists at googlemail.com>
Index: b/fs/Config.in
===================================================================
--- a/fs/Config.in 2010-09-14 11:32:40.000000000 +0200
+++ b/fs/Config.in 2010-09-14 11:32:58.000000000 +0200
@@ -15,13 +15,34 @@
only argument. Make sure the exit code of that script is 0,
otherwise make will stop after calling it.
+choice
+ prompt "Device Creation"
+ default BR2_ROOTFS_DEVICE_CREATION_STATIC
+
+config BR2_ROOTFS_DEVICE_CREATION_STATIC
+ bool "Static using device table"
+
+config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS
+ bool "Dynamic using devtmpfs only"
+
+config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV
+ bool "Dynamic using mdev"
+
+config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
+ bool "Dynamic using udev"
+ select BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
+ select BR2_PACKAGE_UDEV
+
+endchoice
+
config BR2_ROOTFS_DEVICE_TABLE
- string "Path to the device table"
- default "target/generic/device_table.txt"
- help
- Specify the location of a device table, that will be passed
- to the makedevs utility to create all the special device
- files in the target filesystem.
+ string "Path to the device table"
+ depends on BR2_ROOTFS_DEVICE_CREATION_STATIC
+ default "target/generic/device_table.txt"
+ help
+ Specify the location of a device table, that will be passed
+ to the makedevs utility to create all the special device
+ files in the target filesystem.
choice
prompt "Root FS skeleton"
Index: b/package/busybox/S10mdev
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ b/package/busybox/S10mdev 2010-09-14 11:32:58.000000000 +0200
@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# Start the mdev....
+#
+
+case "$1" in
+ start)
+ echo "Starting mdev..."
+ /sbin/mdev -s
+ ;;
+ stop)
+ echo -n "Stopping mdev..."
+ killall mdev
+ ;;
+ restart|reload)
+ "$0" stop
+ "$0" start
+ ;;
+ *)
+ echo $"Usage: $0 {start|stop|restart}"
+ exit 1
+esac
+
+exit $?
+
+
Index: b/package/busybox/busybox.mk
===================================================================
--- a/package/busybox/busybox.mk 2010-09-14 11:32:40.000000000 +0200
+++ b/package/busybox/busybox.mk 2010-09-14 11:33:57.000000000 +0200
@@ -20,6 +20,19 @@
BUSYBOX_CONFIG_FILE = $(call qstrip,$(BR2_PACKAGE_BUSYBOX_CONFIG))
endif
+# If mdev will be used for device creation enable it and copy S10mdev to /etc/init.d
+ifeq ($(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV),y)
+define BUSYBOX_INSTALL_MDEV_SCRIPT
+ install -m 0755 package/busybox/S10mdev $(TARGET_DIR)/etc/init.d
+endef
+define BUSYBOX_SET_MDEV
+ $(call KCONFIG_ENABLE_OPT,CONFIG_MDEV,$(BUSYBOX_BUILD_CONFIG))
+ $(call KCONFIG_ENABLE_OPT,CONFIG_FEATURE_MDEV_CONF,$(BUSYBOX_BUILD_CONFIG))
+ $(call KCONFIG_ENABLE_OPT,CONFIG_FEATURE_MDEV_EXEC,$(BUSYBOX_BUILD_CONFIG))
+ $(call KCONFIG_ENABLE_OPT,CONFIG_FEATURE_MDEV_LOAD_FIRMWARE,$(BUSYBOX_BUILD_CONFIG))
+endef
+endif
+
# If we have external syslogd, force busybox to use it
ifeq ($(BR2_PACKAGE_SYSKLOGD),y)
define BUSYBOX_SET_SYSKLOGD
@@ -114,6 +127,7 @@
$(BUSYBOX_SET_IPV6)
$(BUSYBOX_SET_RPC)
$(BUSYBOX_PREFER_STATIC)
+ $(BUSYBOX_SET_MDEV)
$(BUSYBOX_NETKITBASE)
$(BUSYBOX_NETKITTELNET)
@yes "" | $(MAKE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE="$(TARGET_CROSS)" \
@@ -142,6 +156,7 @@
define BUSYBOX_INSTALL_TARGET_CMDS
$(BUSYBOX_INSTALL_BINARY)
-chmod a+rx $(TARGET_DIR)/usr/share/udhcpc/default.script
+ $(BUSYBOX_INSTALL_MDEV_SCRIPT)
endef
define BUSYBOX_UNINSTALL_TARGET_CMDS
Index: b/linux/linux.mk
===================================================================
--- a/linux/linux.mk 2010-09-14 11:32:40.000000000 +0200
+++ b/linux/linux.mk 2010-09-14 11:32:58.000000000 +0200
@@ -108,6 +108,10 @@
$(call KCONFIG_DISABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,\"\",$(@D)/.config)
endif
+ifneq ($(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
+ $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
+ $(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config)
+endif
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) oldconfig
$(Q)touch $@
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