From 347c65dd1aa7a173fc3ebe7b50abde19021229ee Mon Sep 17 00:00:00 2001 From: "Joshua M. Boniface" Date: Fri, 17 Mar 2017 11:20:21 -0400 Subject: [PATCH] Added bmc.sh shell This "shell" written in BASH provides the basic functionality of the Raspberry Pi BMC, making use of the WiringPi `gpio` command and `sudo` to allow privileged execution of certain functions by a non-root user. --- bmc.sh | 174 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+) create mode 100644 bmc.sh diff --git a/bmc.sh b/bmc.sh new file mode 100644 index 0000000..392e36e --- /dev/null +++ b/bmc.sh @@ -0,0 +1,174 @@ +#!/bin/bash + +stty eof undef +stty intr undef + +hostsystem="$( cat /etc/bmchost )" +packages=( screen wiringpi ) +pkgfail="" +for package in ${packages[@]}; do + dpkg -l | grep "^ii ${package}" &>/dev/null || pkgfail="true" +done +if test -n "$pkgfail"; then + echo -n "Installing required packages... " + sudo apt update &>/dev/null + sudo apt install -y ${packages[@]} &>/dev/null + echo "done." +fi + +help() { + 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[1mpowersw\e[0m - Press power switch on host" + echo -e " \e[1mresetsw\e[0m - Press reset switch on host" + echo -e " \e[1mkill\e[0m - Forcibly power off host" + 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[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() { + 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: $( /opt/vc/bin/vcgencmd measure_temp | awk -F'=' '{ print $2 }' )" +} +sethostname() { + echo -n "Enter new hostname: " + read newhostname + sudo sed -i '/^127.0.1.1/d' /etc/hosts &>/dev/null + sudo tee -a /etc/hosts <<<"127.0.1.1 $newhostname" &>/dev/null + sudo hostname $newhostname &>/dev/null + sudo tee /etc/hostname <<<"$newhostname" &>/dev/null + echo "Hostname set to $newhostname" +} +setpassword() { + echo -n "Enter new BMC password: " + read -s password_1 + echo + echo -n "Reenter new BMC password: " + read -s password_2 + echo + if [ "${password_1}" == "${password_2}" ]; then + echo -n "Setting BMC password... " + sudo chpasswd <<<"bmc:${password_1}" + echo "done." + else + echo "Passwords to not match!" + fi +} +resetsw() { + echo -n "Pressing reset switch... " + gpio mode 0 out + gpio write 0 1 + gpio write 0 0 + sleep 1 + echo "done." +} +powersw() { + if [ "$1" == "hard" ]; then + delay='sleep 10' + echo -n "Holding power switch... " + else + delay='sleep 1' + echo -n "Pressing power switch... " + fi + gpio mode 1 out + gpio write 1 1 + $delay + gpio write 1 0 + sleep 2 + echo "done." +} +readpower() { + gpio mode 2 in + powerstate_raw=$(gpio read 2) + if [ "${powerstate_raw}" -eq 1 ]; then + powerstate="\e[32mOn\e[0m" + else + powerstate="\e[31mOff\e[0m" + fi +} + +readpower +echo +echo -e "--------------------" +echo -e "| Raspberry Pi BMC |" +echo -e "--------------------" +echo +echo -e "Host system: \e[1m${hostsystem}\e[0m" +echo -e "Host state: $powerstate" +echo +help +echo +while true; do +stty eof undef +stty intr undef +echo -en "\e[1m\e[34m[$(hostname)]>\e[0m " +read input +case $input in + 'state') + readpower + echo -e "Host state: $powerstate" + echo + ;; + 'console') + echo "Starting console..." + sudo screen -r serialconsole &>/dev/null || sudo screen -S serialconsole /dev/ttyUSB0 115200 + echo + ;; + 'powersw') + powersw soft + readpower + echo -e "Host state: $powerstate" + echo + ;; + 'resetsw') + resetsw + readpower + echo -e "Host state: $powerstate" + echo + ;; + 'kill') + powersw hard + readpower + echo -e "Host state: $powerstate" + echo + ;; + 'help') + help + echo + ;; + 'bmc') + bmcinfo + echo + ;; + 'hostname') + sethostname + echo + ;; + 'password') + setpassword + echo + ;; + 'shell') + stty sane + /bin/bash + help + echo + ;; + 'exit'|'logout') + exit 0 + ;; + '') + continue + ;; + *) + echo "Invalid command." + echo + ;; +esac +done