mirror of
https://github.com/linuxboot/heads.git
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67 lines
1.4 KiB
Bash
Executable File
67 lines
1.4 KiB
Bash
Executable File
#!/bin/ash
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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
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mount /proc
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mount /sys
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# Setup our path
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export PATH=/sbin:/bin
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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
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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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. /config
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if [ -z "$CONFIG_TIMEOUT" ]; then
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CONFIG_TIMEOUT=10
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fi
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while true; do
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boot_option=
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# Verify the user's TPM secret
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echo "TPM TOTP:"
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if ! unsealtotp.sh ; then
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echo '!!!!!'
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echo '!!!!! TPM TOTP secret not found.'
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echo '!!!!! This firmware can not be trusted.'
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echo '!!!!! Entering recovery shell'
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echo '!!!!!'
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tpm extend -ix 4 -ic "tpm-failure"
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exec /bin/ash
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fi
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# Secret decrypted ok, so prompt for a next step
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read \
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-t "$CONFIG_TIMEOUT" \
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-p "Enter for normal boot or 'r' for recovery shell: " \
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-n 1 \
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boot_option
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if [ "$boot_option" = "r" ]; then
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# Start an interactive shell
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echo '***** Starting recovery shell'
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tpm extend -ix 4 -ic "recovery"
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exec /bin/ash
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fi
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if [ "$boot_option" = "" ]; then
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if [ ! -x "$CONFIG_BOOTSCRIPT" ]; then
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echo '!!!!! Boot script missing? Entering recovery shell'
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tpm extend -ix 4 -ic "boot-failure"
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exec /bin/ash
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fi
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echo '***** Normal boot'
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tpm extend -ix 4 -ic "normal-boot"
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exec "$CONFIG_BOOTSCRIPT"
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fi
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done
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