rpibmc/bmc.sh

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#!/bin/bash
#
# bmc.sh - BMC command shell
#
# This program works as the main user shell for the RPi BMC. It provides a
# command-line interface for interfacing with the running bmcd daemon
# program as well as a few distinct functions such as a serial console, as
# well as managing the BMC itself (e.g. BMC hostname, IP address, or host
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# system name). It is designed to be started automatically on login to the
# BMC as the 'bmc' user, e.g. with the following passwd file entry:
# bmc:x:2000:2000:BMC:/home/dir:/path/to/bmc.sh
#
# Has dependencies on the 'bmcd' and 'screen' utilities.
#
# Part of the RPiBMC project - (c)2017 Joshua Boniface
# This software is licenced under the terms of the GNU GPL version 3. For
# details please see LICENSE
#
stty eof undef
stty intr undef
hostsystem="$( cat /etc/bmchost )"
bmcd_cmdpipe="/run/bmcd/bmcd.cmd"
bmcd_statepipe="/run/bmcd/bmcd.state"
help() {
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echo -e "Available commands:"
echo -e " \e[1mstate\e[0m - Show the system power state"
echo -e " \e[1mconsole\e[0m - Connect to host via serial console; ^A+D to disconnect"
echo -e " \e[1mpower\e[0m - Press power switch on host"
echo -e " \e[1mreset\e[0m - Press reset switch on host"
echo -e " \e[1mkill\e[0m - Forcibly power off host"
echo -e " \e[1mlocate\e[0m - Enable locator (flash power LED)"
echo -e " \e[1munlocate\e[0m - Disable locator"
echo -e " \e[1mhelp\e[0m - This help menu"
echo -e " \e[1mbmc\e[0m - Show BMC information"
echo -e " \e[1mhostname\e[0m - Set BMC hostname"
echo -e " \e[1mhost\e[0m - Set host system name"
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echo -e " \e[1mpassword\e[0m - Set BMC password"
echo -e " \e[1mshell\e[0m - Start a BMC bash shell"
echo -e " \e[1mexit/logout\e[0m - Disconnect from the BMC"
}
bmcinfo() {
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echo -e "BMC information:"
echo -e " IP address: $( ip -4 addr list eth0 | grep inet | awk '{ print $2 }' )"
echo -e " Hostname: $( hostname )"
echo -e " BMC temperature: $( sudo /opt/vc/bin/vcgencmd measure_temp | awk -F'=' '{ print $2 }' )"
}
sethostname() {
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newhostname="${1}"
echo "Setting hostname to '${newhostname}'."
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sudo sed -i '/^127.0.1.1/d' /etc/hosts &>/dev/null
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sudo tee -a /etc/hosts <<<"127.0.1.1 ${newhostname}" &>/dev/null
sudo hostname ${newhostname} &>/dev/null
sudo tee /etc/hostname <<<"${newhostname}" &>/dev/null
}
sethost() {
newbmcname="${1}"
echo "Setting host system name to '${newbmcname}'."
sudo tee /etc/bmcname <<<"${newbmcname}" &>/dev/null
}
setpassword() {
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password="${1}"
echo "Setting BMC password."
sudo chpasswd <<<"bmc:${password}"
}
resetsw_press() {
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echo "Pressing reset switch."
echo "resetsw_press" > ${bmcd_cmdpipe}
}
powersw_press() {
echo "Pressing power switch."
echo "powersw_press" > ${bmcd_cmdpipe}
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sleep 2 # Wait a bit to let it sink in
}
powersw_hold() {
echo "Holding power switch."
echo "powersw_hold" > ${bmcd_cmdpipe}
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sleep 2 # wait a bit to let it sink in
}
locate_on() {
echo "Enabling locator - host power LED will flash."
echo "locate_on" > ${bmcd_cmdpipe}
}
locate_off() {
echo "Disabling locator."
echo "locate_off" > ${bmcd_cmdpipe}
}
readpower() {
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powerstate_raw=$(cat ${bmcd_statepipe})
if [[ "${powerstate_raw}" -eq 1 ]]; then
powerstate="\e[32mOn\e[0m"
else
powerstate="\e[31mOff\e[0m"
fi
}
# Read the power state
readpower
# Print our login splash
echo
echo -e "--------------------"
echo -e "| Raspberry Pi BMC |"
echo -e "--------------------"
echo
echo -e "Host system: \e[1m${hostsystem}\e[0m"
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echo -e "Host state: ${powerstate}"
echo
help
echo
# Main loop
while true; do
stty eof undef
stty intr undef
# Prompt
echo -en "\e[1m\e[34m[$(hostname)]>\e[0m "
# Read input
read input
# Process input
case ${input} in
'state')
readpower
echo -e "Host state: ${powerstate}"
echo
;;
'console')
echo "Starting console..."
# Connect to screen, or start it
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sudo screen -r serialconsole &>/dev/null || sudo screen -S serialconsole /dev/ttyAMA0 115200
# If the user killed screen, restart it - just in case
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pgrep screen &>/dev/null || sudo screen -S serialconsole /dev/ttyAMA0 115200
echo
;;
'power')
powersw_press
readpower
echo -e "Host state: ${powerstate}"
echo
;;
'reset')
resetsw_press
echo
;;
'kill')
powersw_hold
readpower
echo -e "Host state: ${powerstate}"
echo
;;
'locate')
locate_on
echo
;;
'unlocate')
locate_off
echo
;;
'help')
help
echo
;;
'bmc')
bmcinfo
echo
;;
'hostname')
echo -n "Enter new hostname: "
read newhostname
sethostname ${newhostname}
echo
;;
'host')
echo -n "Enter new host system name: "
read newhost
sethost ${newhost}
echo -n "Update BMC hostname to '${newhost}-bmc'? (y/N) "
read updatehostnameyn
if [[ "${updatehostnameyn}" =~ "y" ]]; then
sethostname "${newhost}-bmc"
fi
;;
'password')
echo -n "Enter new BMC password: "
read -s password_1
echo
echo -n "Reenter new BMC password: "
read -s password_2
echo
if [ "${password_1}" == "${password_2}" ]; then
setpassword "${password_1}"
else
echo "Passwords to not match!"
fi
echo
;;
'shell')
stty sane
/bin/bash
help
echo
;;
'exit'|'logout')
exit 0
;;
'')
continue
;;
*)
echo "Invalid command."
echo
;;
esac
done