heads/initrd/etc/ash_functions

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#!/bin/sh
#
# Core shell functions that do not require bash. These functions are used with
# busybox ash on legacy-flash boards, and with bash on all other boards.
die() {
echo >&2 " !!! ERROR: $* !!!";
sleep 2;
exit 1;
}
warn() {
echo >&2 " *** WARNING: $* ***";
sleep 1;
}
DEBUG() {
if [ "$CONFIG_DEBUG_OUTPUT" = "y" ];then
echo "DEBUG: $*" | tee -a /tmp/debug.log >&2;
fi
}
TRACE() {
if [ "$CONFIG_ENABLE_FUNCTION_TRACING_OUTPUT" = "y" ];then
echo "TRACE: $*" | tee -a /tmp/debug.log >&2;
fi
}
preserve_rom() {
TRACE "Under /etc/ash_functions:preserve_rom"
new_rom="$1"
old_files=`cbfs -t 50 -l 2>/dev/null | grep "^heads/"`
for old_file in `echo $old_files`; do
new_file=`cbfs.sh -o $1 -l | grep -x $old_file`
if [ -z "$new_file" ]; then
echo "+++ Adding $old_file to $1"
cbfs -t 50 -r $old_file >/tmp/rom.$$ \
|| die "Failed to read cbfs file from ROM"
cbfs.sh -o $1 -a $old_file -f /tmp/rom.$$ \
|| die "Failed to write cbfs file to new ROM file"
fi
done
}
recovery() {
TRACE "Under /etc/ash_functions:recovery"
echo >&2 "!!!!! $*"
# Remove any temporary secret files that might be hanging around
# but recreate the directory so that new tools can use it.
#safe to always be true. Otherwise "set -e" would make it exit here
shred -n 10 -z -u /tmp/secret/* 2> /dev/null || true
rm -rf /tmp/secret
mkdir -p /tmp/secret
# ensure /tmp/config exists for recovery scripts that depend on it
touch /tmp/config
. /tmp/config
if [ "$CONFIG_TPM" = "y" ]; then
tpmr extend -ix 4 -ic recovery
fi
if [ "$CONFIG_RESTRICTED_BOOT" = y ]; then
echo >&2 "Restricted Boot enabled, recovery console disabled, rebooting in 5 seconds"
sleep 5
/bin/reboot
fi
while [ true ]
do
echo >&2 "!!!!! Starting recovery shell"
sleep 1
if [ -x /bin/setsid ]; then
/bin/setsid -c /bin/sh
else
/bin/sh
fi
done
}
pause_recovery() {
TRACE "Under /etc/ash_functions:pause_recovery"
read -p $'!!! Hit enter to proceed to recovery shell !!!\n'
recovery $*
}
combine_configs() {
TRACE "Under /etc/ash_functions:combine_configs"
cat /etc/config* > /tmp/config
}
enable_usb()
{
TRACE "Under /etc/ash_functions:enable_usb"
#insmod ehci_hcd prior of uhdc_hcd and ohci_hcd to suppress dmesg warning
if ! lsmod | grep -q ehci_hcd; then
insmod /lib/modules/ehci-hcd.ko \
|| die "ehci_hcd: module load failed"
fi
if [ "$CONFIG_LINUX_USB_COMPANION_CONTROLLER" = y ]; then
if ! lsmod | grep -q uhci_hcd; then
insmod /lib/modules/uhci-hcd.ko \
|| die "uhci_hcd: module load failed"
fi
if ! lsmod | grep -q ohci_hcd; then
insmod /lib/modules/ohci-hcd.ko \
|| die "ohci_hcd: module load failed"
fi
if ! lsmod | grep -q ohci_pci; then
insmod /lib/modules/ohci-pci.ko \
|| die "ohci_pci: module load failed"
fi
fi
if ! lsmod | grep -q ehci_pci; then
insmod /lib/modules/ehci-pci.ko \
|| die "ehci_pci: module load failed"
fi
if ! lsmod | grep -q xhci_hcd; then
insmod /lib/modules/xhci-hcd.ko \
|| die "xhci_hcd: module load failed"
fi
if ! lsmod | grep -q xhci_pci; then
insmod /lib/modules/xhci-pci.ko \
|| die "xhci_pci: module load failed"
sleep 2
fi
if [ "$CONFIG_USB_KEYBOARD" = y ]; then
if ! lsmod | grep -q usbhid; then
insmod /lib/modules/usbhid.ko \
|| die "usbhid: module load failed"
fi
fi
}