[oe] [PATCH 09/17] initramfs-uniboot: be quiet and avoid code duplication

[Otavio Salvador]

 * add getarg method to parse /proc/cmdline and return the option
   value;
 * refactor readargs to use getarg API;
 * avoid printing when 'quiet' boot param is used;

Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---
 recipes/initrdscripts/files/init.sh            |   60 ++++++++++++++---------
 recipes/initrdscripts/initramfs-uniboot_1.0.bb |    2 +-
 2 files changed, 37 insertions(+), 25 deletions(-)

diff --git a/recipes/initrdscripts/files/init.sh b/recipes/initrdscripts/files/init.sh
index 26fd57f..00fec0d 100644
--- a/recipes/initrdscripts/files/init.sh
+++ b/recipes/initrdscripts/files/init.sh
@@ -3,6 +3,7 @@
 MODULE_DIR=/initrd.d
 BOOT_ROOT=
 ROOT_DEVICE=
+VERBOSE=
 
 early_setup() {
     mkdir -p /proc /sys /mnt /tmp
@@ -13,34 +14,45 @@ early_setup() {
     modprobe -q mtdblock
 }
 
+info() {
+	[ -n "$VERBOSE" ] && echo $*
+}
+
 dev_setup()
 {
-    echo -n "initramfs: Creating device nodes: "
+    info -n "initramfs: Creating device nodes: "
     grep '^ *[0-9]' /proc/partitions | while read major minor blocks dev
     do
         if [ ! -e /dev/$dev ]; then
-            echo -n "$dev "
+            info -n "$dev "
             [ -e /dev/$dev ] || mknod /dev/$dev b $major $minor
         fi
     done
-    echo
+    info
 }
 
-read_args() {
-    [ -z "$CMDLINE" ] && CMDLINE=`cat /proc/cmdline`
-    for arg in $CMDLINE; do
-        optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'`
-        case $arg in
-            root=*)
-                ROOT_DEVICE=$optarg ;;
-            rootfstype=*)
-                ROOT_FSTYPE=$optarg ;;
-            rootdelay=*)
-                rootdelay=$optarg ;;
-            debug) set -x ;;
-            shell) sh ;;
-        esac
+getarg() {
+    local o
+
+    [ -z "$cmdline" ] && cmdline=`cat /proc/cmdline`
+    for o in $cmdline; do
+        test "$o" = "$1" && return 0
+        if test "${o%%=*}" = "${1%=}"; then
+            echo ${o#*=}
+            return 0
+        fi
     done
+    return 1
+}
+
+read_args() {
+	ROOT_DEVICE=$(getarg root=)
+	ROOTFS_TYPE=$(getarg rootfstype=)
+	rootdelay=$(getarg rootdelay=)
+
+	getarg debug && set -x
+	getarg quiet || VERBOSE=1
+	getarg shell && sh
 }
 
 do_depmod() {
@@ -49,7 +61,7 @@ do_depmod() {
 
 load_module() {
     # Cannot redir to $CONSOLE here easily - may not be set yet
-    echo "initramfs: Loading $module module"
+    info "initramfs: Loading $module module"
     source $1
 }
 
@@ -71,22 +83,22 @@ fatal() {
 }
 
 
-echo "Starting initramfs boot..."
 early_setup
+read_args
+
+info "Starting initramfs boot..."
 load_modules '0*'
 do_depmod
 
 [ -z "$CONSOLE" ] && CONSOLE="/dev/console"
 
-read_args
-
 if [ -z "$rootdelay" ]; then
-    echo "rootdelay parameter was not passed on kernel command line - assuming 2s delay"
-    echo "If you would like to avoid this delay, pass explicit rootdelay=0"
+    info "rootdelay parameter was not passed on kernel command line - assuming 2s delay"
+    info "If you would like to avoid this delay, pass explicit rootdelay=0"
     rootdelay="2"
 fi
 if [ -n "$rootdelay" ]; then
-    echo "Waiting $rootdelay seconds for devices to settle..." >$CONSOLE
+    info "Waiting $rootdelay seconds for devices to settle..." >$CONSOLE
     sleep $rootdelay
 fi
 
diff --git a/recipes/initrdscripts/initramfs-uniboot_1.0.bb b/recipes/initrdscripts/initramfs-uniboot_1.0.bb
index 79650aa..e90d268 100644
--- a/recipes/initrdscripts/initramfs-uniboot_1.0.bb
+++ b/recipes/initrdscripts/initramfs-uniboot_1.0.bb
@@ -1,5 +1,5 @@
 SRC_URI = "file://init.sh"
-PR = "r12"
+PR = "r13"
 DESCRIPTION = "A modular initramfs init script system."
 RRECOMMENDS_${PN} = "kernel-module-mtdblock"
 
-- 
1.7.1