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[BROKEN] Script for ChromeOS Flex to add cros_debug / dev mode option in grub.cfg
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| ########################################################################## | |
| ### THIS SCRIPT NO LONGER WORKS DUE TO RECENT CHANGES IN CHROMEOS Flex ### | |
| ########################################################################## | |
| ### Script to add cros_debug / dev mode option in grub.cfg | |
| ### ( Each Flex update removes cros_debug / dev mode option | |
| ### Be sure to run this script AFTER each update and BEFORE rebooting ) | |
| ANS= | |
| ROOTDEVICE= | |
| ROOTDEVICEPREFIX= | |
| P12MOUNTPOINT=/var/p12 | |
| GRUBCFGPATH=$P12MOUNTPOINT/efi/boot | |
| GRUBCFGFILE=grub.cfg | |
| # Exits the script with return code $1, spitting out message $@ to stderr | |
| error() { | |
| local ecode="$1" | |
| shift | |
| echo "$*" 1>&2 | |
| return "$ecode" | |
| } | |
| # Find the root device | |
| # Sets: | |
| # - $ROOTDEVICE as the root device (e.g. /dev/sda or /dev/mmcblk0) | |
| # - $ROOTDEVICEPREFIX as a prefix for partitions (/dev/sda, /dev/mmcblk0p) | |
| findrootdevice() { | |
| ROOTDEVICE="`rootdev -d -s`" | |
| if [ -z "$ROOTDEVICE" ]; then | |
| error 1 "Cannot find root device." | |
| fi | |
| if [ ! -b "$ROOTDEVICE" ]; then | |
| error 1 "$ROOTDEVICE is not a block device." | |
| fi | |
| # If $ROOTDEVICE ends with a number (e.g. mmcblk0), partitions are named | |
| # ${ROOTDEVICE}pX (e.g. mmcblk0p1). If not (e.g. sda), they are named | |
| # ${ROOTDEVICE}X (e.g. sda1). | |
| ROOTDEVICEPREFIX="$ROOTDEVICE" | |
| if [ "${ROOTDEVICE%[0-9]}" != "$ROOTDEVICE" ]; then | |
| ROOTDEVICEPREFIX="${ROOTDEVICE}p" | |
| fi | |
| } | |
| findrootdevice | |
| if [ ! -d $P12MOUNTPOINT ]; then | |
| # Make mountpoint | |
| echo "Making directory to mount partition 12" | |
| sudo mkdir -p $P12MOUNTPOINT | |
| elif [ ! -d $GRUBCFGPATH ]; then | |
| # Mount EFI partition | |
| echo "Mounting ${ROOTDEVICEPREFIX}12 on $P12MOUNTPOINT" | |
| sudo mount ${ROOTDEVICEPREFIX}12 $P12MOUNTPOINT | |
| fi | |
| # Check for cros_debug option, need 5 | |
| DEBUGCOUNT="$(grep 'cros_efi cros_debug' $GRUBCFGPATH/$GRUBCFGFILE | wc -l)" | |
| if [ "$DEBUGCOUNT" -eq 5 ]; then | |
| echo "cros_debug has been added to $GRUBCFGFILE, no changes needed." | |
| exit | |
| fi | |
| # grub.cfg needs editing | |
| echo "Editing $GRUBCFGFILE to add 'cros_debug' option." | |
| echo " | |
| PLEASE NOTE: | |
| I claim no responsibility for any damage or harm that may occur to your | |
| device as a result of running this script. PROCEED AT YOR OWN RISK. | |
| " | |
| echo -n "[ press ENTER to continue - Ctrl-C to abort ] "; read ANS | |
| cp $GRUBCFGPATH/$GRUBCFGFILE /tmp | |
| # vi /tmp/$GRUBCFGFILE | |
| sed -e 's/cros_efi /cros_efi cros_debug /' -e 's/cros_efi root/cros_efi cros_debug root/' /tmp/$GRUBCFGFILE | |
| sudo cp $GRUBCFGPATH/$GRUBCFGFILE $GRUBCFGPATH/${GRUBCFGFILE}.bak | |
| sudo cp /tmp/$GRUBCFGFILE $GRUBCFGPATH/ | |
| echo "Done, you can reboot now." | |
| exit |
@idarek
Sorry, I should take it down since it no longer works.
The devs have made changes to Flex with ownership and mount points that prevent this script from working correctly now.
Please leave it up as it is a top hit in google search, and if nothing else will help spread the word that cros_debug option no longer seems to boot dev mode. If and when we find how to turn on developer mode on newer flex versions we can link it here. No answers yet at:
https://support.google.com/chromeosflex/thread/285244470/unable-to-enter-developer-mode-on-chromeos-flex-version-126?hl=en#redirected=true
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Hi. A simple (may be silly question) but how to run this script in ChromeOS Flex environment?