| 1 | #!/bin/bash |
| 2 | |
| 3 | trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR |
| 4 | set -eE -o pipefail |
| 5 | |
| 6 | # verbose command |
| 7 | v() { |
| 8 | printf "$0 running: %s\n" "$*" |
| 9 | "$@" |
| 10 | } |
| 11 | |
| 12 | |
| 13 | usage() { |
| 14 | cat <<EOF |
| 15 | Basic Usage: libremanage poweroff|poweron|reboot HOSTNAME |
| 16 | |
| 17 | Available HOSTNAMEs defined in /etc/libremanage.conf on this machine: |
| 18 | |
| 19 | EOF |
| 20 | |
| 21 | if [[ -e /etc/libremanage.conf ]]; then |
| 22 | sed -r '/\s*#/d;/^\s*$/d;s/_.*//' /etc/libremanage.conf |
| 23 | else |
| 24 | echo "/etc/libremanage.conf does not exist." |
| 25 | fi |
| 26 | |
| 27 | cat <<EOF |
| 28 | |
| 29 | Thats all you need to know unless you are defining configuration or |
| 30 | setting up a new device. |
| 31 | |
| 32 | |
| 33 | |
| 34 | |
| 35 | |
| 36 | Advanced Usage: libremanage [--switch] poweroff|poweron|reboot HOSTNAME|CHANNEL [BOARD_ID] |
| 37 | |
| 38 | Note, the relay's channels default state when plugged in are off. |
| 39 | |
| 40 | Example /etc/libremanage.conf: |
| 41 | |
| 42 | # This config is sourced from bash, so make sure its valid bash. |
| 43 | cephserver3_channel=1 |
| 44 | cephserver3_board_id=HURTM |
| 45 | cephserver2_channel=2 |
| 46 | cephserver2_board_id=HURTM |
| 47 | |
| 48 | librecmc1_type=switch |
| 49 | cephserver2_type=button # default |
| 50 | |
| 51 | # end of config |
| 52 | |
| 53 | |
| 54 | Example use: |
| 55 | |
| 56 | $ libremanage reboot cephserver3 |
| 57 | |
| 58 | --switch means means that the relay controls on an on/off switch (with |
| 59 | default on), instead of a pc power button, which is the default. This |
| 60 | corresponds to the config option HOST_type=switch. |
| 61 | |
| 62 | BOARD_ID is not needed if only 1 relay device is connected, or if it is |
| 63 | defined in the config. To understand CHANNEL and BOARD_ID, run |
| 64 | hidusb-relay-cmd and hidusb-relay-cmd state. |
| 65 | |
| 66 | |
| 67 | WARNING: Avoid ever manually running "hidusb-relay-cmd on" in |
| 68 | production, because if you lose connectivity and can't turn it off, its |
| 69 | like the server's power button is stuck being pushed in and it won't |
| 70 | turn on in that state. You will need to physically replug usb power to |
| 71 | the relay so the channel goes back to its default off state. If this |
| 72 | script somehow dies after turning a relay on, running it again will turn |
| 73 | it off. That is why this script runs locally and ignores signals when |
| 74 | its running. If you run this script over ssh and lose connection as this |
| 75 | script is running, it will continue to run and complete. |
| 76 | |
| 77 | EOF |
| 78 | if [[ -e /etc/libremanage.conf ]]; then |
| 79 | echo "Current /etc/libremanage.conf:" |
| 80 | cat /etc/libremanage.conf |
| 81 | else |
| 82 | echo "Note: /etc/libremanage.conf does not exist on the current machine" |
| 83 | fi |
| 84 | exit 0 |
| 85 | } |
| 86 | |
| 87 | |
| 88 | |
| 89 | switch=false |
| 90 | if [[ $1 == --switch ]]; then |
| 91 | switch=true |
| 92 | shift |
| 93 | fi |
| 94 | |
| 95 | if (( $# < 2 )); then |
| 96 | usage |
| 97 | fi |
| 98 | |
| 99 | read action hostchan board_id <<<"$@" |
| 100 | |
| 101 | if [[ -e /etc/libremanage.conf ]]; then |
| 102 | source /etc/libremanage.conf |
| 103 | fi |
| 104 | |
| 105 | # Use config vars when appropriate. We know the arg is a HOSTNAME if it |
| 106 | # doesn't start with a number. |
| 107 | case $hostchan in |
| 108 | [0-9]*) |
| 109 | chan=$hostchan |
| 110 | ;; |
| 111 | *) |
| 112 | |
| 113 | # allow board_id to be empty if its unset |
| 114 | if [[ ! $board_id ]]; then |
| 115 | board_id_var=${hostchan}_board_id |
| 116 | board_id=${!board_id_var} |
| 117 | fi |
| 118 | |
| 119 | chan_var=${hostchan}_channel |
| 120 | chan=${!chan_var} |
| 121 | if [[ ! $chan ]]; then |
| 122 | echo "error: channel not set on cli and not found in /etc/libremanage.conf" >&2 |
| 123 | exit 1 |
| 124 | fi |
| 125 | |
| 126 | type_var=${hostchan}_type |
| 127 | type=${!type_var} |
| 128 | if [[ $type == switch ]]; then |
| 129 | switch=true |
| 130 | fi |
| 131 | ;; |
| 132 | esac |
| 133 | |
| 134 | |
| 135 | if ! $switch && hidusb-relay-cmd state | grep -F R$CHAN=ON; then |
| 136 | cat >&2 <<EOF |
| 137 | $0: ERROR: Output from hidusb-relay-cmd state shows an ON relay, as if |
| 138 | the power button is stuck in the pressed state. This could mean another |
| 139 | command instance is running, or it got stuck on due to an uncompleted |
| 140 | run. Exiting now so you can investigate. To manually switch it back to |
| 141 | OFF, run the following command, or unplug the relay from usb power. |
| 142 | |
| 143 | hidusb-relay-cmd $board_id_arg off $chan |
| 144 | |
| 145 | EOF |
| 146 | exit 1 |
| 147 | fi |
| 148 | |
| 149 | |
| 150 | case $(hidusb-relay-cmd state|wc -l) in |
| 151 | 0) |
| 152 | echo "error: got 0 lines from running hidusb-relay-cmd state" >&2 |
| 153 | exit 1 |
| 154 | ;; |
| 155 | 1) : ;; |
| 156 | *) |
| 157 | if [[ ! $board_id ]]; then |
| 158 | echo "error: more than 1 relay device, so passing its id is required" >&2 |
| 159 | exit 1 |
| 160 | fi |
| 161 | ;; |
| 162 | esac |
| 163 | |
| 164 | |
| 165 | if [[ $board_id ]]; then |
| 166 | # leave this as an empty var if its not passed |
| 167 | board_id_arg="id=$board_id" |
| 168 | fi |
| 169 | |
| 170 | # ignore errors and continue on if a command fails from here |
| 171 | set +eE +o pipefail |
| 172 | # ignore hup so we complete even if there is a connection problem, and |
| 173 | # force anyone to kill -9 so we might complete in more cases, for |
| 174 | # example if a reboot is happening |
| 175 | trap '' HUP INT QUIT TERM |
| 176 | echo "$0: doing $action. shell commands will be printed to the terminal." |
| 177 | case $action in |
| 178 | poweroff) |
| 179 | if $switch; then |
| 180 | v hidusb-relay-cmd $board_id_arg on $chan |
| 181 | else |
| 182 | v hidusb-relay-cmd $board_id_arg on $chan |
| 183 | v sleep 6 |
| 184 | v hidusb-relay-cmd $board_id_arg off $chan |
| 185 | fi |
| 186 | ;; |
| 187 | poweron) |
| 188 | if $switch; then |
| 189 | v hidusb-relay-cmd $board_id_arg off $chan |
| 190 | else |
| 191 | v hidusb-relay-cmd $board_id_arg on $chan |
| 192 | v sleep 1 |
| 193 | v hidusb-relay-cmd $board_id_arg off $chan |
| 194 | fi |
| 195 | ;; |
| 196 | reboot) |
| 197 | if $switch; then |
| 198 | v hidusb-relay-cmd $board_id_arg on $chan |
| 199 | v sleep 4 |
| 200 | v hidusb-relay-cmd $board_id_arg off $chan |
| 201 | else |
| 202 | v hidusb-relay-cmd $board_id_arg on $chan |
| 203 | v sleep 6 |
| 204 | v hidusb-relay-cmd $board_id_arg off $chan |
| 205 | v sleep 1 |
| 206 | v hidusb-relay-cmd $board_id_arg on $chan |
| 207 | v sleep 1 |
| 208 | v hidusb-relay-cmd $board_id_arg off $chan |
| 209 | fi |
| 210 | ;; |
| 211 | *) |
| 212 | echo "error: action arg not supported" >&2 |
| 213 | exit 1 |
| 214 | esac |
| 215 | echo "$0: script ended. exiting" |