mirror of
https://github.com/linuxboot/heads.git
synced 2024-12-19 13:07:58 +00:00
141 lines
3.8 KiB
Bash
Executable File
141 lines
3.8 KiB
Bash
Executable File
#!/bin/ash
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mknod /dev/ttyprintk c 5 3
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echo "hello world" > /dev/ttyprintk
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# Setup our path
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export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin
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# This is the very first script invoked by the Linux kernel and is
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# running out of the ram disk. There are no fileysstems mounted.
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# It is important to have a way to invoke a recovery shell in case
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# the boot scripts are messed up, but also important to modify the
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# PCRs if this happens to prevent the TPM disk keys from being revealed.
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# First thing it is vital to mount the /dev and other system directories
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mkdir /proc /sys /dev /tmp /boot /media 2>&- 1>&-
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mount /dev 2>/dev/ttyprintk
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mount /proc 2>/dev/ttyprintk
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mount /sys 2>/dev/ttyprintk
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if [ "$CONFIG_LINUXBOOT" = "y" ]; then
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mount /sys/firmware/efi/efivars
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fi
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# Setup the pty psudeo filesystem
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mkdir /dev/pts
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mount /dev/pts 2>/dev/ttyprintk
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if [ ! -r /dev/ptmx ]; then
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ln -s /dev/pts/ptmx /dev/ptmx
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fi
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# Recovery shells will erase anything from here
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mkdir -p /tmp/secret
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# Now it is safe to print a banner
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if [ -r /etc/motd ]; then
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cat /etc/motd > /dev/tty0
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fi
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# Load the date from the hardware clock, setting it in local time
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hwclock -l -s
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# Read the system configuration parameters
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. /etc/functions
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. /etc/config
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#Specify whiptail background colors cues under FBWhiptail only
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if [ -x /bin/fbwhiptail ]; then
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export BG_COLOR_WARNING="${CONFIG_WARNING_BG_COLOR:-"--background-gradient 0 0 0 150 125 0"}"
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export BG_COLOR_ERROR="${CONFIG_ERROR_BG_COLOR:-"--background-gradient 0 0 0 150 0 0"}"
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else
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export BG_COLOR_WARNING="${CONFIG_WARNING_BG_COLOR:-""}"
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export BG_COLOR_ERROR="${CONFIG_ERROR_BG_COLOR:-""}"
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fi
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if [ "$CONFIG_COREBOOT" = "y" ]; then
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/bin/cbfs-init
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fi
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if [ "$CONFIG_LINUXBOOT" = "y" ]; then
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/bin/uefi-init
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fi
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# Set GPG_TTY before calling gpg in key-init
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export GPG_TTY=/dev/console
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/bin/key-init
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# Setup recovery serial shell
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if [ ! -z "$CONFIG_BOOT_RECOVERY_SERIAL" ]; then
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stty -F "$CONFIG_BOOT_RECOVERY_SERIAL" 115200
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pause_recovery 'Console recovery shell' \
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< "$CONFIG_BOOT_RECOVERY_SERIAL" \
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> "$CONFIG_BOOT_RECOVERY_SERIAL" 2>&1 &
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fi
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# load USB modules for boards using a USB keyboard
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if [ "$CONFIG_USB_KEYBOARD" = "y" ]; then
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enable_usb
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fi
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# If the user has been holding down r, enter a recovery shell
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# otherwise immediately start the configured boot script.
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# We don't print a prompt, since this is a near instant timeout.
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read \
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-t 0.1 \
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-n 1 \
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boot_option
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echo
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if [ "$boot_option" = "r" ]; then
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# Start an interactive shell
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recovery 'User requested recovery shell'
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# just in case...
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if [ "$CONFIG_TPM" = "y" ]; then
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tpm extend -ix 4 -ic recovery
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fi
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exec /bin/ash
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exit
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fi
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combine_configs
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. /tmp/config
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# export firmware version
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export FW_VER=$(dmesg | grep 'DMI' | grep -o 'BIOS.*' | cut -f2- -d ' ')
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# chop off date, since will always be epoch w/timeless builds
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FW_VER=${FW_VER::-10}
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# Add our boot devices into the /etc/fstab, if they are defined
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# in the configuration file.
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if [ ! -z "$CONFIG_BOOT_DEV" ]; then
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echo >> /etc/fstab "$CONFIG_BOOT_DEV /boot auto defaults,ro 0 0"
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fi
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if [ ! -x "$CONFIG_BOOTSCRIPT" -a ! -x "$CONFIG_BOOTSCRIPT_NETWORK" ]; then
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recovery 'Boot script missing? Entering recovery shell'
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else
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if [ -x "$CONFIG_BOOTSCRIPT_NETWORK" ]; then
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echo '***** Network Boot:' $CONFIG_BOOTSCRIPT_NETWORK
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$CONFIG_BOOTSCRIPT_NETWORK
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echo '***** Network Boot Completed:' $CONFIG_BOOTSCRIPT_NETWORK
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# not blocking
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fi
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if [ -x "$CONFIG_BOOTSCRIPT" ]; then
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echo '***** Normal boot:' $CONFIG_BOOTSCRIPT
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exec "$CONFIG_BOOTSCRIPT"
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# We should never reach here, but just in case...
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recovery 'Boot script failure? Entering recovery shell'
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else
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# wait for boot via network to occur
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pause_recovery 'Override network boot. Entering recovery shell'
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fi
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fi
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# belts and suspenders, just in case...
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if [ "$CONFIG_TPM" = "y" ]; then
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tpm extend -ix 4 -ic recovery
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fi
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exec /bin/ash
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