initramfs-live-boot: make it more generic and easy to use

The script was making some assumptions that enforced many requirement
in the machine kernel configuration and usage, besides it were too
while booting.

Changes included:

 * fix indentation;
 * rdepends on udev;
 * allow use of isofs as module;
 * remove rootdelay param parsing as it was unused;
 * don't verbosely kill udevd and mknod;
 * mount devtmpfs into rootfs, if available, before swithing root;

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh
index c054863a2aa77da21451c1b0ca269cd147eddd87..eb5ab5b7a52be87ddc1668ede51233a3b1f04dbc 100644 (file)
--- a/meta/recipes-core/initrdscripts/files/init-live.sh
+++ b/meta/recipes-core/initrdscripts/files/init-live.sh
@@ -13,6 +13,11 @@ early_setup() {
     mkdir /sys
     mount -t proc proc /proc
     mount -t sysfs sysfs /sys
+
+    # support modular kernel
+    modprobe isofs 2> /dev/null
+
+    mkdir /run
     udevd --daemon
     udevadm trigger --action=add
 }
@@ -25,21 +30,25 @@ read_args() {
             root=*)
                 ROOT_DEVICE=$optarg ;;
             rootfstype=*)
-                ROOT_FSTYPE=$optarg ;;
-            rootdelay=*)
-                rootdelay=$optarg ;;
-           LABEL=*)
-               label=$optarg ;;
-           video=*)
-               video_mode=$arg ;;
-           vga=*)
-               vga_mode=$arg ;;
+                modprobe $optarg 2> /dev/null ;;
+            LABEL=*)
+                label=$optarg ;;
+            video=*)
+                video_mode=$arg ;;
+            vga=*)
+                vga_mode=$arg ;;
         esac
     done
 }
 
 boot_live_root() {
-    killall udevd
+    killall udevd 2>/dev/null
+
+    # use devtmpfs if available
+    if grep -q devtmpfs /proc/filesystems; then
+        mount -t devtmpfs devtmpfs $ROOT_MOUNT/dev
+    fi
+
     cd $ROOT_MOUNT
     exec switch_root -c /dev/console $ROOT_MOUNT /sbin/init
 }
@@ -78,7 +87,7 @@ done
 case $label in
     boot)
        mkdir $ROOT_MOUNT
-       mknod /dev/loop0 b 7 0
+       mknod /dev/loop0 b 7 0 2>/dev/null
 
        if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
            fatal "Couldnt mount rootfs image"
@@ -97,4 +106,3 @@ case $label in
        fatal "Installation image failed"
        ;;
 esac
-

diff --git a/meta/recipes-core/initrdscripts/initramfs-live-boot_1.0.bb b/meta/recipes-core/initrdscripts/initramfs-live-boot_1.0.bb
index b404f8c600d0d18ca88b5365a0d1e21861ef0967..e85a0e11899ad6eca2c6d8ab036f67553aeaf75b 100644 (file)
--- a/meta/recipes-core/initrdscripts/initramfs-live-boot_1.0.bb
+++ b/meta/recipes-core/initrdscripts/initramfs-live-boot_1.0.bb
@@ -1,9 +1,10 @@
 DESCRIPTION = "A live image init script"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS = "udev"
 SRC_URI = "file://init-live.sh"
 
-PR = "r6"
+PR = "r7"
 
 do_install() {
         install -m 0755 ${WORKDIR}/init-live.sh ${D}/init