scripts/trigger-rcmd

   1 #!/bin/sh
   2 #
   3 # trigger-rcmp: Trigger remote commands
   4 # Copyright (c)2014 Alexander Barton (alex@barton.de)
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 # Please read the file COPYING, README and AUTHORS for more information.
  11 #
  12
  13 NAME="`basename "$0"`"
  14 RCMD_D="/usr/local/etc/rcmd.d"
  15
  16 PATH="$PATH:/usr/local/sbin:/usr/sbin"
  17
  18 do_help() {
  19         echo "Usage: $0 <rcmd> [<rcmd> [...]]" >&2
  20         exit 2
  21 }
  22
  23 do_rcmd() {
  24         SYSTEM="localhost"
  25         IFACE="eth0"
  26         CMD="uptime"
  27         TIMEOUT="180"
  28         SSH_CHECKS="6"
  29         WAKE_DELAY="10s"
  30
  31         . "$cnf"
  32
  33         if [ $? -ne 0 ]; then
  34                 echo "$NAME: failed to read \"$cnf\"!"
  35                 return 2
  36         fi
  37
  38         NAME="$NAME($1)"
  39
  40         echo "$NAME: checking system \"$SYSTEM\" ..."
  41         fping -c1 -q "$SYSTEM" 2>/dev/null
  42         if [ $? -ne 0 ]; then
  43                 if [ -n "$NO_WAKE" ]; then
  44                         echo "$NAME: \"$SYSTEM\" seems to be down, skipping job."
  45                         return 9
  46                 fi
  47
  48                 echo "$NAME: \"$SYSTEM\" seems to be down, wake it up ..."
  49                 etherwake -b -i "$IFACE" `echo "$SYSTEM" | cut -d'.' -f1`
  50                 if [ $? -ne 0 ]; then
  51                         echo "$NAME: failed to wake \"$SYSTEM\"!" >&2
  52                         return 3
  53                 fi
  54                 echo "$NAME: waiting for \"$SYSTEM\" to respond ..."
  55                 for i in `seq 1 $TIMEOUT`; do
  56                         fping -c1 -q "$SYSTEM" 2>/dev/null
  57                         [ $? -ne 0 ] || break
  58                         sleep 1s
  59                 done
  60                 fping -c1 -q "$SYSTEM" 2>/dev/null
  61                 if [ $? -ne 0 ]; then
  62                         echo "$NAME: failed to wake \"$SYSTEM\"!" >&2
  63                         return 4
  64                 fi
  65                 sleep "$WAKE_DELAY"
  66                 rsys_was_running=0
  67         else
  68                 echo "$NAME: \"$SYSTEM\" is already alive, ok."
  69                 rsys_was_running=1
  70         fi
  71
  72         for i in `seq 1 $SSH_CHECKS`; do
  73                 echo "$NAME: checking SSH connection ($i/$SSH_CHECKS) ..."
  74                 ssh -q "$SYSTEM" true >/dev/null 2>&1 && break
  75                 echo "$NAME: SSH on \"$SYSTEM\" not ready. Waiting ..."
  76                 sleep 10s
  77         done
  78
  79         echo "$NAME: calling \"$CMD\" on \"$SYSTEM\" ..."
  80         echo
  81
  82         ssh -q "$SYSTEM" "$CMD" </dev/null ; r=$?
  83
  84         echo
  85         echo "$NAME: remote command ended with return code $r."
  86         sleep 2
  87
  88         if [ "$rsys_was_running" -eq 0 ]; then
  89                 rsys_users=`ssh -q "$SYSTEM" w | tail -n +3 | wc -l`
  90                 if [ "$rsys_users" = "0" ]; then
  91                         echo "$NAME: power off \"$SYSTEM\" again ..."
  92                         ssh -q "$SYSTEM" "sync; shutdown -hP +1" >/dev/null
  93                         if [ $? -ne 0 ]; then
  94                                 echo "$NAME: failed to power off \"$SYSTEM\"!" >&2
  95                                 return 5
  96                         fi
  97                 else
  98                         echo "$NAME: not shutting down \"$SYSTEM\", \c"
  99                         [ $rsys_users -eq 1 ] \
 100                                 && echo "there is 1 user logged in!" \
 101                                 || echo "there are $rsys_users users logged in!"
 102                 fi
 103         else
 104                 echo "$NAME: \"$SYSTEM\" was already alive, not shutting down."
 105         fi
 106         [ $r -eq 0 ] && return 0 || return 1
 107 }
 108
 109 # Defaults
 110 NO_WAKE=
 111
 112 while [ $# -gt 0 ]; do
 113         case "$1" in
 114           --no-wake|-n)
 115                 NO_WAKE=1; ;;
 116           --help|-*)
 117                 do_help; ;;
 118           *)
 119                 break
 120         esac
 121         shift
 122 done
 123
 124 [ $# -gt 0 ] || do_help
 125
 126 result=0
 127 while [ $# -gt 0 ]; do
 128         cnf="$RCMD_D/$1"
 129         if [ ! -r "$cnf" ]; then
 130                 echo "$NAME: can't read \"$cnf\"!"
 131                 r=1
 132         else
 133                 echo "$NAME: working on \"$1\" - `date "+%Y-%m-%d %H:%M:%S"`"
 134                 do_rcmd "$1" ; r=$?
 135                 echo "$NAME: done ($r) - `date "+%Y-%m-%d %H:%M:%S"`"
 136         fi
 137         [ $r -ne 0 ] && result=1
 138         shift
 139         [ $# -gt 0 ] && echo
 140 done
 141 exit $result