On Friday 04 March 2011 03:41:56 Rob Landley wrote:
> Don't #ifdef ANDROID and hardwire in various random strings. Make the
> string a config symbol with a sane default, and let people set it in
> their config. (If you'd like to suggest a few in the help text, fine.
> But I don't find the fact that Busybox is getting more brittle with time
> to be a comforting trend.)
>
> Rob
Hi,
this could be easily fixed without code changes:
1) substitute /system/bin/sh with a busybox build with only ash enabled
2) or mount bind it at boot time
if [ -e /system/xbin/busybox ] ; then
mount --bind /system/xbin/sh /system/bin/sh;
fi;
More in general to add a compatibility layer for real linux, scripts can be
used,
but this is stuff for android forums ;-).
Ciao,
Tito
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#!/system/bin/sh
#
# (C) 2009 - 2010 [email protected]
#
SYSTEM_BUILD_PROP="/system/build.prop"
SD_PATH="/sd-ext";
# Modify the system - set rw
mount -o remount,rw /dev/mtdblock3 /system;
mount -o remount,rw /dev/rootfs /;
if [ `grep -c "^/dev/block/mmcblk0p2 $SD_PATH " /proc/mounts` -eq 1 ] ; then
# Prepare dir and link for overriding system binaries
mkdir /usr;
chown root.root /usr;
chmod 755 /usr;
if [ ! -e $SD_PATH/bin ] ; then
mkdir $SD_PATH/bin;
fi;
chown root.shell $SD_PATH/bin;
chmod 755 $SD_PATH/bin;
busybox ln -s $SD_PATH/bin /usr/bin;
# Prepare dir for additional libs
if [ ! -e $SD_PATH/lib ] ; then
mkdir $SD_PATH/lib;
fi;
chown root.shell $SD_PATH/lib;
chmod 755 $SD_PATH/lib;
busybox ln -s $SD_PATH/lib /usr/lib;
find $SD_PATH/lib/ -name *.so | while read line ; do
name=`basename $line`;
busybox ln -s $line /system/lib/$name;
done;
# Prepare fake home dir
if [ ! -e $SD_PATH/home ] ; then
mkdir $SD_PATH/home;
chown root.root $SD_PATH/home;
chmod 755 $SD_PATH/home;
fi;
busybox ln -s $SD_PATH/home /home;
busybox ln -s /system/lib /lib
# Use ash as default shell
if [ -e /usr/bin/busybox ] ; then
mount --bind /usr/bin/sh /system/bin/sh;
fi;
# Setup fstab, mtab, passwd and group files
if [ ! -e $SD_PATH/etc ] ; then
mkdir $SD_PATH/etc;
fi;
chmod 644 $SD_PATH/etc;
chown root.root $SD_PATH/etc;
chown root.root $SD_PATH/etc/passwd;
chown root.root $SD_PATH/etc/group;
chown root.root $SD_PATH/etc/shadow;
chown root.root $SD_PATH/etc/gshadow;
chown root.root $SD_PATH/etc/fstab;
chown root.root $SD_PATH/etc/shells;
chown root.root $SD_PATH/etc/profile;
chmod 644 $SD_PATH/etc/passwd;
chmod 644 $SD_PATH/etc/group;
chmod 600 $SD_PATH/etc/shadow;
chmod 600 $SD_PATH/etc/gshadow;
chmod 644 $SD_PATH/etc/shells;
chmod 644 $SD_PATH/etc/profile;
if [ ! -e /etc/fstab ] ; then
busybox ln -s $SD_PATH/etc/fstab /etc/fstab;
fi;
chmod 644 $SD_PATH/etc/fstab;
busybox ln -s $SD_PATH/etc/passwd /etc/passwd;
busybox ln -s $SD_PATH/etc/shadow /etc/shadow;
busybox ln -s $SD_PATH/etc/group /etc/group;
busybox ln -s $SD_PATH/etc/gshadow /etc/gshadow;
busybox ln -s $SD_PATH/etc/shells /etc/shells;
busybox ln -s $SD_PATH/etc/profile /etc/profile;
if [ ! -e /etc/mtab ] ; then
busybox ln -s /proc/mounts /etc/mtab;
fi;
fi;
# Fix scripts in /system/bin needed by busybox ash
for i in am ime input monkey pm svc;
do
if [ `grep -c "#!/system/bin/sh" /system/bin/$i` -eq 0 ] ; then
echo "#!/system/bin/sh" > /system/bin/$i.tmp;
cat /system/bin/$i >> /system/bin/$i.tmp;
mv /system/bin/$i.tmp /system/bin/$i;
chown root.shell /system/bin/$i;
chmod 755 /system/bin/$i;
fi;
done;
# Setup resolv.conf, needed by ping
if [ `grep -c "208.67.222.222" /etc/resolv.conf` -eq 0 ] ; then
echo "nameserver 208.67.222.222" > /etc/resolv.conf;
echo "nameserver 208.67.220.220" >> /etc/resolv.conf;
setprop net.dns1 208.67.222.222;
setprop net.dns2 208.67.220.220;
fi;
# Device compatibility
for i in 0 1 2 3 4 5 6 7;
do
busybox ln -s /dev/block/loop$i /dev/loop$i;
done;
# Clean up /system/etc/hosts file - paranoia
echo "127.0.0.1 localhost" > /system/etc/hosts
# Use our own host file as default
if [ -e /sd-ext/etc/hosts ] ; then
mount --bind /sd-ext/etc/hosts /system/etc/hosts;
fi;
# Remount all ro
mount -o remount,ro /dev/rootfs /;
mount -o remount,ro /dev/mtdblock3 /system;
exit 0;
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