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ea7163f4 IK |
1 | #!/bin/bash |
2 | ||
d2b5d6a9 IK |
3 | trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR |
4 | ||
5 | usage() { | |
6 | cat <<EOF | |
7 | Usage: relay-cmd poweroff|poweron|reboot HOSTNAME|CHANNEL [RELAY_ID] | |
8 | ||
9 | For CHANNEL and RELAY_ID, run hidusb-relay-cmd and hidusb-relay-cmd state. | |
10 | I recommend writing a config to use HOSTNAME instead. Config is /etc/relay-cmd.conf | |
11 | Example config: | |
12 | ||
13 | # This config is just bash that gets sourced. | |
14 | # relay_id is not needed if only 1 relay is connected. | |
15 | cephserver3_channel=1 | |
16 | cephserver3_relay_id=HURTM | |
17 | EOF | |
18 | exit $1 | |
19 | } | |
20 | ||
21 | ||
22 | if (( $# < 2 )); then | |
23 | usage | |
24 | fi | |
25 | ||
26 | read action chan relay_id <<<"$@" | |
27 | ||
28 | if [[ -e /etc/relay-cmd.conf ]]; then | |
29 | source /etc/relay-cmd.conf | |
30 | fi | |
31 | ||
32 | if [[ $chan != [0-9]* ]]; then | |
33 | chan_var=${chan}_channel | |
34 | chan=${!chan_var} | |
35 | if [[ ! $chan ]]; then | |
36 | echo "error: channel not found in /etc/relay-cmd.conf" >&2 | |
37 | exit 1 | |
38 | fi | |
39 | if [[ ! $relay_id ]]; then | |
40 | relay_id_var=${chan}_relay_id | |
41 | relay=${!relay_id_var} | |
42 | fi | |
43 | fi | |
44 | ||
ea7163f4 IK |
45 | |
46 | if hidusb-relay-cmd state | grep ON; then | |
47 | printf "%s\n" "WARNING: output from hidusb-relay-cmd state shows an ON relay. this could mean another command instance is running, or it got stuck on due to an uncompleted command." >&2 | |
48 | fi | |
49 | ||
ea7163f4 IK |
50 | |
51 | case $(hidusb-relay-cmd state|wc -l) in | |
52 | 0) | |
53 | echo "error: got 0 lines from running hidusb-relay-cmd state" >&2 | |
54 | exit 1 | |
55 | ;; | |
56 | 1) : ;; | |
d2b5d6a9 IK |
57 | *) |
58 | if [[ ! $relay_id ]]; then | |
59 | echo "error: more than 1 relay device, so passing its id is required" >&2 | |
60 | exit 1 | |
61 | fi | |
62 | ;; | |
ea7163f4 IK |
63 | esac |
64 | ||
d2b5d6a9 | 65 | |
ea7163f4 IK |
66 | if [[ $relay_id ]]; then |
67 | # leave this as an empty var if its not passed | |
68 | relay_id_arg="id=$relay_id" | |
69 | fi | |
70 | ||
d2b5d6a9 IK |
71 | # verbose command |
72 | v() { | |
73 | printf "+ %s\n" "$*" | |
74 | "$@" | |
75 | } | |
76 | ||
77 | ||
78 | # ignore hup so we complete even if there is a connection problem. | |
ea7163f4 | 79 | trap '' HUP |
d2b5d6a9 | 80 | echo "$0: doing $action. shell commands are printed to the terminal:" |
ea7163f4 IK |
81 | case $action in |
82 | poweroff) | |
d2b5d6a9 IK |
83 | v hidusb-relay-cmd $relay_id_arg on $chan |
84 | v sleep 6 | |
85 | v hidusb-relay-cmd $relay_id_arg off $chan | |
ea7163f4 IK |
86 | ;; |
87 | poweron) | |
d2b5d6a9 IK |
88 | v hidusb-relay-cmd $relay_id_arg on $chan |
89 | v sleep 1 | |
90 | v hidusb-relay-cmd $relay_id_arg off $chan | |
ea7163f4 IK |
91 | ;; |
92 | reboot) | |
d2b5d6a9 IK |
93 | v hidusb-relay-cmd $relay_id_arg on $chan |
94 | v sleep 6 | |
95 | v hidusb-relay-cmd $relay_id_arg off $chan | |
96 | v sleep 1 | |
97 | v hidusb-relay-cmd $relay_id_arg on $chan | |
98 | v sleep 1 | |
99 | v hidusb-relay-cmd $relay_id_arg off $chan | |
ea7163f4 IK |
100 | ;; |
101 | *) | |
102 | echo "error: action arg not supported" >&2 | |
103 | exit 1 | |
104 | esac | |
d2b5d6a9 | 105 | echo "$0: script ended. exiting" |