[Buildroot] [PATCH v6 2/2] add bootloader isolinux for iso9660 filesystem image

jean.sorgemoel at laposte.net jean.sorgemoel at laposte.net
Sun Mar 2 21:41:55 UTC 2014 

From: Jerome Sagnole <jean.sorgemoel at laposte.net>

	* Adding bootloader isolinux

	* Modify kernel filename (use variable LINUX_IMAGE_NAME)

	* Update grub/isolinux configuration
		replace __LINUX_IMAGE_NAME__ by value of LINUX_IMAGE_NAME

Signed-off-by: Jerome Sagnole <jean.sorgemoel at laposte.net>
---

changes v4 -> v5:
	* addon to include comment Arnout Vandecappelle & Martin Bark
	* modify option to include files and directories in iso image
	   - suppress option BR2_TARGET_ROOTFS_ISOLINUX_EXTRA_FILES
	   - add option BR2_TARGET_ROOTFS_ISO9660_OVERLAY
	   - modify code to include this new option
	* modify comment
	* modify signed-off-by (use real name)
	* keep default option for BR2_TARGET_ROOTFS_ISO9660_ROCK_RIDGE
	    in old code, it defined by default (keep for compatibility)
	* modify default option for BR2_TARGET_ROOTFS_ISO9660_NAME
	* modify default option for BR2_TARGET_ROOTFS_ISO9660_INPUT_CHARSET 
	* modify variable name to add prefix 'ISO9660_'
	* "qstrip" each variable
	    BR2_TARGET_ROOTFS_ISO9660_INPUT_CHARSET
	    BR2_TARGET_ROOTFS_ISO9660_NAME
	* modify command INITRD_SED_CMD
	* modify kernel launch for this iso 
	   - use LINUX_IMAGE_NAME 
	   - add command sed to replace __LINUX_IMAGE_NAME__ in configuration
	* suppress bootmsg.txt in isolinux.cfg is empty (bootloader isolinux)


changes v3 -> v4:
	* addon to include remark Arnout Vandecappelle & Thomas Petazzoni
	* add choise to select bootloader in iso9660 menu
	* modify comment
	* seperate code in two patch
	  1st patch : update iso9660 with grub
	  2nd patch : add new bootloader isolinux


changes v2 -> v3:
	* addon to include remark Thomas Petazzoni & Arnout Vandecappelle
	  - modify comment
	  - default generate iso with grub bootloader
	  - you can select isolinux bootloader
	    - detail : (module fs/iso9660)
	    - option to select bootloader (grub/isolinux)
	    - file(s) bootloader configuration
	    - option to copy file(s) on iso (only for isolinux)
	    - option to create iso with long filenames (Joliet format)
	    - option to create iso with POSIX file system (file mode, uid, gid, ...)
	    - define volume label
	    - define parameter input charset
	    - can use initramfs (if activate), also cpio (like initrd)

changes v1 -> v2:
	* simplify code (suggest by Arnout Vandecappelle)
	  - I suppress redundant comment
	  - Suppress menu and use conditional (replace 'depends on' by 'if/endif')
	  - Modify comment
	  - suppress option (keyboard, ...)
	  - replace 8 x space by tabulation
	  - suppress extension 'BR2_'
	  - use variable 'ISOLINUX_DIR'
	  - suppress keyboard option
	  - I can't use command '$(INSTALL) -D' beacause I don't define filenames (I keep old code)
	  - Hide command genisoimage (with option $@) 

Changes v0 -> v1:
	* new branch to generate iso with bootloader isolinux


 fs/iso9660/Config.in    |   40 ++++++++++++++++++++++++++++++++++++++--
 fs/iso9660/bootmsg.txt  |    4 ++++
 fs/iso9660/iso9660.mk   |   40 +++++++++++++++++++++++++++++++++++-----
 fs/iso9660/isolinux.cfg |   10 ++++++++++
 fs/iso9660/menu.lst     |    2 +-
 5 files changed, 88 insertions(+), 8 deletions(-)
 create mode 100644 fs/iso9660/bootmsg.txt
 create mode 100644 fs/iso9660/isolinux.cfg

diff --git a/fs/iso9660/Config.in b/fs/iso9660/Config.in
index e881ca6..eb45591 100644
--- a/fs/iso9660/Config.in
+++ b/fs/iso9660/Config.in
@@ -3,12 +3,30 @@ config BR2_TARGET_ROOTFS_ISO9660
 	depends on (BR2_i386 || BR2_x86_64)
 	depends on BR2_LINUX_KERNEL
 	select BR2_TARGET_ROOTFS_CPIO
-	select BR2_TARGET_GRUB
-	select BR2_TARGET_GRUB_FS_ISO9660
 	help
 	  Build a bootable iso9660 image
 
 if BR2_TARGET_ROOTFS_ISO9660
+choice
+	prompt "Bootloader"
+	default BR2_TARGET_ROOTFS_ISO9660_GRUB
+	help
+	  Select the bootloader that should be used for the bootable
+	  ISO9660 image.
+
+config BR2_TARGET_ROOTFS_ISO9660_GRUB
+	bool "grub"
+	select BR2_TARGET_GRUB
+	select BR2_TARGET_GRUB_FS_ISO9660
+
+config BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
+	bool "isolinux"
+	select BR2_TARGET_SYSLINUX
+	select BR2_TARGET_SYSLINUX_ISOLINUX
+
+endchoice
+
+if BR2_TARGET_ROOTFS_ISO9660_GRUB
 
 config BR2_TARGET_ROOTFS_ISO9660_BOOT_MENU
 	string "Boot menu.lst file"
@@ -17,6 +35,24 @@ config BR2_TARGET_ROOTFS_ISO9660_BOOT_MENU
 	  Grub configuration
 	  Define menu, commands and options for grub
 
+endif # BR2_TARGET_ROOTFS_ISO9660_GRUB
+
+if BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
+
+config BR2_TARGET_ROOTFS_ISO9660_ISOLINUX_BOOT_MESSAGE
+	string "Boot message"
+	default "fs/iso9660/bootmsg.txt"
+	help
+	  Displays the contents of this file on the screen at boot time
+
+config BR2_TARGET_ROOTFS_ISO9660_ISOLINUX_CONFIG_FILE
+	string "Configuration file"
+	default "fs/iso9660/isolinux.cfg"
+	help
+	  This file defines all options to start isolinux
+
+endif # BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
+
 config BR2_TARGET_ROOTFS_ISO9660_JOLIET
 	bool "Create iso with Joliet format (long filenames)"
 	default y
diff --git a/fs/iso9660/bootmsg.txt b/fs/iso9660/bootmsg.txt
new file mode 100644
index 0000000..efc9dfc
--- /dev/null
+++ b/fs/iso9660/bootmsg.txt
@@ -0,0 +1,4 @@
+Buildroot isolinux boot
+  buildroot) Launch linux from the CD-ROM
+  harddrive) Hard Drive (first partition)
+
diff --git a/fs/iso9660/iso9660.mk b/fs/iso9660/iso9660.mk
index 7ac84ca..d18538d 100644
--- a/fs/iso9660/iso9660.mk
+++ b/fs/iso9660/iso9660.mk
@@ -8,33 +8,63 @@
 ################################################################################
 
 ISO9660_TARGET_DIR = $(BUILD_DIR)/iso9660
-ISO9660_BOOT_MENU := $(call qstrip,$(BR2_TARGET_ROOTFS_ISO9660_BOOT_MENU))
+ISO9660_INITRD_SED_CMD = '/initrd/Id'
 ISO9660_CHARSET = $(call qstrip,$(BR2_TARGET_ROOTFS_ISO9660_INPUT_CHARSET))
 ISO9660_NAME = $(call qstrip,$(BR2_TARGET_ROOTFS_ISO9660_NAME))
-ISO9660_KERNEL_DST = $(ISO9660_TARGET_DIR)/kernel
+ISO9660_KERNEL_DST = $(ISO9660_TARGET_DIR)/$(LINUX_IMAGE_NAME)
 
+ifeq ($(BR2_TARGET_ROOTFS_ISO9660_GRUB),y)
+ISO9660_BOOTLOADER_PACKAGE = grub
 ISO9660_BOOTLOADER_BIN = $(GRUB_DIR)/stage2/stage2_eltorito
 ISO9660_BOOTLOADER_DIR = $(ISO9660_TARGET_DIR)/boot/grub/
+ISO9660_BOOTLOADER_SRC_CFG = $(call qstrip, \
+		$(BR2_TARGET_ROOTFS_ISO9660_BOOT_MENU))
 ISO9660_BOOTLOADER_DST_CFG = $(ISO9660_TARGET_DIR)/boot/grub/menu.lst
 ISO9660_ELTORITO_BOOT = boot/grub/stage2_eltorito
+endif
+
+ifeq ($(BR2_TARGET_ROOTFS_ISO9660_ISOLINUX),y)
+ISO9660_BOOTLOADER_PACKAGE = syslinux
+ISO9660_BOOTLOADER_BIN = $(BINARIES_DIR)/isolinux.bin
+ISO9660_BOOTLOADER_DIR = $(ISO9660_TARGET_DIR)
+ISO9660_BOOTLOADER_SRC_CFG = $(BR2_TARGET_ROOTFS_ISO9660_ISOLINUX_CONFIG_FILE)
+ISO9660_BOOTLOADER_DST_CFG = $(ISO9660_TARGET_DIR)/isolinux.cfg
+ISO9660_ELTORITO_BOOT = isolinux.bin
+ISO9660_BOOT_MESSAGE = $(call qstrip, \
+		$(BR2_TARGET_ROOTFS_ISO9660_ISOLINUX_BOOT_MESSAGE))
+endif
 
-$(BINARIES_DIR)/rootfs.iso9660: host-cdrkit host-fakeroot linux rootfs-cpio grub
+$(BINARIES_DIR)/rootfs.iso9660: host-cdrkit host-fakeroot linux rootfs-cpio $(ISO9660_BOOTLOADER_PACKAGE)
 	@$(call MESSAGE,"Generating root filesystem image rootfs.iso9660")
 	@mkdir -p $(ISO9660_TARGET_DIR)
 	@mkdir -p $(ISO9660_BOOTLOADER_DIR)
 
 	@cp $(ISO9660_BOOTLOADER_BIN) $(ISO9660_BOOTLOADER_DIR)
-	@cp $(ISO9660_BOOT_MENU) $(ISO9660_BOOTLOADER_DST_CFG)
+	@cp $(ISO9660_BOOTLOADER_SRC_CFG) $(ISO9660_BOOTLOADER_DST_CFG)
 	@cp $(LINUX_IMAGE_PATH) $(ISO9660_KERNEL_DST)
 
+ifeq ($(BR2_TARGET_ROOTFS_ISO9660_GRUB),y)
 ifeq ($(BR2_TARGET_GRUB_SPLASH),)
 	@$(SED) '/^splashimage/d' $(ISO9660_BOOTLOADER_DST_CFG)
 else
 	@cp boot/grub/splash.xpm.gz $(ISO9660_TARGET_DIR)/
 endif # BR2_TARGET_GRUB_SPLASH
+endif # BR2_TARGET_ROOTFS_ISO9660_GRUB
+
+ifeq ($(BR2_TARGET_ROOTFS_ISO9660_ISOLINUX),y)
+ifeq ($(ISO9660_BOOT_MESSAGE),)
+	@$(SED) '/display bootmsg.txt/d' $(ISO9660_BOOTLOADER_DST_CFG)
+else
+	@cp $(ISO9660_BOOT_MESSAGE) \
+		$(ISO9660_TARGET_DIR)
+endif  # ISO9660_BOOT_MESSAGE
+endif  # BR2_TARGET_ROOTFS_ISO9660_ISOLINUX
+
+	@$(SED) 's/__LINUX_IMAGE_NAME__/'$(LINUX_IMAGE_NAME)'/g' \
+		$(ISO9660_BOOTLOADER_DST_CFG)
 
 ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
-	@$(SED) '/initrd/d'  $(ISO9660_BOOTLOADER_DST_CFG)
+	@$(SED) $(ISO9660_INITRD_SED_CMD)  $(ISO9660_BOOTLOADER_DST_CFG)
 else
 	@cp $(BINARIES_DIR)/rootfs.cpio$(ROOTFS_CPIO_COMPRESS_EXT) \
 		$(ISO9660_TARGET_DIR)/initrd
diff --git a/fs/iso9660/isolinux.cfg b/fs/iso9660/isolinux.cfg
new file mode 100644
index 0000000..947d441
--- /dev/null
+++ b/fs/iso9660/isolinux.cfg
@@ -0,0 +1,10 @@
+display bootmsg.txt
+default buildroot
+timeout 10
+prompt 1
+LABEL buildroot
+  KERNEL __LINUX_IMAGE_NAME__
+  INITRD initrd
+
+LABEL harddrive
+  LOCALBOOT 0x80
diff --git a/fs/iso9660/menu.lst b/fs/iso9660/menu.lst
index c0bbff6..8cfb5e0 100644
--- a/fs/iso9660/menu.lst
+++ b/fs/iso9660/menu.lst
@@ -12,7 +12,7 @@ foreground 	000000
 background 	cccccc
 
 title		Buildroot ISO9660 image
-kernel		/kernel
+kernel		/__LINUX_IMAGE_NAME__
 initrd		/initrd
 
 title		Hard Drive (first partition)
-- 
1.7.10.4

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