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3eb62eed1a
As part of the config gui we want to be able to have the system define
new config options without them being lost if the user makes their own
changes in CBFS. To allow that this change creates a function initiated
in init that combines all /etc/config* files into /tmp/config. All
existing scripts have been changed to source /tmp/config instead of
/etc/config. The config-gui.sh script now uses /etc/config.user to hold
user configuration options but the combine_configs function will allow
that to expand as others want to split configuration out further.
As it stands here are the current config files:
/etc/config -- Compiled-in configuration options
/etc/config.user -- User preferences that override /etc/config
/tmp/config -- Running config referenced by the BIOS, combination
of existing configs
118 lines
3.1 KiB
Bash
Executable File
118 lines
3.1 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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mount /sys/firmware/efi/efivars
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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
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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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combine_configs
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. /tmp/config
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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 [ ! -z "$CONFIG_USB_BOOT_DEV" ]; then
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echo >> /etc/fstab "$CONFIG_USB_BOOT_DEV /media auto defaults,ro 0 0"
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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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/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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# 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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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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