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: $0 <rcmd> [<rcmd> [...]]" >&2
  20         exit 2
  21 }
  22
  23 do_rcmd() {
  24         SYSTEM="localhost"
  25         IFACE="eth0"
  26         CMD="uptime"
  27         TIMEOUT="180"
  28
  29         . "$cnf"
  30
  31         if [ $? -ne 0 ]; then
  32                 echo "$NAME: failed to read \"$cnf\"!"
  33                 return 2
  34         fi
  35
  36         NAME="$NAME($1)"
  37
  38         echo "$NAME: checking system \"$SYSTEM\" ..."
  39         fping -c1 -q "$SYSTEM" 2>/dev/null
  40         if [ $? -ne 0 ]; then
  41                 echo "$NAME: \"$SYSTEM\" seems to be down, wake it up ..."
  42                 etherwake -b -i "$IFACE" `echo "$SYSTEM" | cut -d'.' -f1`
  43                 if [ $? -ne 0 ]; then
  44                         echo "$NAME: failed to wake \"$SYSTEM\"!" >&2
  45                         return 3
  46                 fi
  47                 echo "$NAME: waiting for \"$SYSTEM\" to respond ..."
  48                 for i in `seq 1 $TIMEOUT`; do
  49                         fping -c1 -q "$SYSTEM" 2>/dev/null
  50                         [ $? -ne 0 ] || break
  51                         sleep 1s
  52                 done
  53                 fping -c1 -q "$SYSTEM" 2>/dev/null
  54                 if [ $? -ne 0 ]; then
  55                         echo "$NAME: failed to wake \"$SYSTEM\"!" >&2
  56                         return 4
  57                 fi
  58                 sleep 3
  59                 rsys_was_running=0
  60         else
  61                 echo "$NAME: \"$SYSTEM\" is already alive, ok."
  62                 rsys_was_running=1
  63         fi
  64
  65         echo "$NAME: calling \"$CMD\" on \"$SYSTEM\" ..."
  66         echo
  67
  68         ssh -q "$SYSTEM" "$CMD" </dev/null ; r=$?
  69
  70         echo
  71         echo "$NAME: remote command ended with return code $r."
  72         sleep 2
  73
  74         if [ "$rsys_was_running" -eq 0 ]; then
  75                 rsys_users=`ssh -q "$SYSTEM" w | tail -n +3 | wc -l`
  76                 if [ "$rsys_users" = "0" ]; then
  77                         echo "$NAME: power off \"$SYSTEM\" again ..."
  78                         ssh -q "$SYSTEM" "sync; shutdown -hP +1"
  79                         if [ $? -ne 0 ]; then
  80                                 echo "$NAME: failed to power off \"$SYSTEM\"!" >&2
  81                                 return 5
  82                         fi
  83                 else
  84                         echo "$NAME: not shutting down \"$SYSTEM\", \c"
  85                         [ $rsys_users -eq 1 ] \
  86                                 && echo "there is 1 user logged in!" \
  87                                 || echo "there are $rsys_users users logged in!"
  88                 fi
  89         else
  90                 echo "$NAME: \"$SYSTEM\" was already alive, not shutting down."
  91         fi
  92         [ $r -eq 0 ] && return 0 || return 1
  93 }
  94
  95 while [ $# -gt 0 ]; do
  96         case "$1" in
  97           --help|-*)
  98                 do_help; ;;
  99           *)
 100                 break
 101         esac
 102         shift
 103 done
 104
 105 [ $# -gt 0 ] || do_help
 106
 107 result=0
 108 while [ $# -gt 0 ]; do
 109         cnf="$RCMD_D/$1"
 110         if [ ! -r "$cnf" ]; then
 111                 echo "$NAME: can't read \"$cnf\"!"
 112                 r=1
 113         else
 114                 echo "$NAME: working on \"$1\" - `date "+%Y-%m-%d %H:%M:%S"`"
 115                 do_rcmd "$1" ; r=$?
 116                 echo "$NAME: done ($r) - `date "+%Y-%m-%d %H:%M:%S"`"
 117         fi
 118         [ $r -ne 0 ] && result=1
 119         shift
 120         [ $# -gt 0 ] && echo
 121 done
 122 exit $result