SMS alerts My how-to

[Kyriacos Sakkas]

Thanks to all  for replies in how to make  my script better,  it now
incorporates  nearly all of the suggested improvments, plus some
others of my own.

I include the new current version below, together with an extra script
used, found in debians bash-doc package. If you wish to discuss it
further, please send To: me and cc to the list if you wish, otherwise
I might not spot your message.

Thanks to all,

Kyriacos Sakkas.

Scripts:
smsspool.sh==================================================
#!/bin/bash
#simple sms spooling system, implemented for nagios
#People who added code to this:
#sakkas at unimedcy.com  dennis at intouch.net  andreas.ericsson at op5.se
#
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/scripts

for i in `ls /var/spool/sms/sms*`
do
if [ "$i" != "" ]; then
                # fixed. Protects from symlink attacks.
                test -f "$i" || continue
                # get one line only
                num=`head -n 1 "$i" | cut -d @ -f 2`
                msg=`head -n 2 "$i" | cut -d @ -f 1`
                /usr/local/scripts/timeout.sh -15 40 :2 +2 --
/usr/bin/gsmsendsms -b 9600 -d /dev/mobilephone $nu
m "$msg" || exit 1
                logger "SMS Message Send to: -$num-"
                # don't remove anything but exactly this file
                # (double quotes is a meager safeguard, but better
than nothing).
                rm -f "$i"
        fi
done
exit 0
===========================================================
timeout.sh====================================================
#Newsgroups: comp.unix.admin,comp.unix.solaris,comp.unix.shell
#From: gwc at root.co.uk (Geoff Clare)
#Subject: Re: timeout -t <sec> <unix command> (Re: How to give rsh a
shorter timeout?)
#Message-ID: <EoBxrs.223 at root.co.uk>
#Date: Fri, 13 Feb 1998 18:23:52 GMT

#
# Conversion to bash v2 syntax done by Chet Ramey <chet at po.cwru.edu
# UNTESTED
#

prog=${0##*/}
usage="usage: $prog [-signal] [timeout] [:interval] [+delay] [--]
<command>"

SIG=-TERM       # default signal sent to the process when the timer
expires
timeout=60      # default timeout
interval=15     # default interval between checks if the process is
still alive
delay=2         # default delay between posting the given signal and
                # destroying the process (kill -KILL)

while :
do
        case $1 in
        --)     shift; break ;;
        -*)     SIG=$1 ;;
        [0-9]*) timeout=$1 ;;
        :*)     EXPR='..\(.*\)' ; interval=`expr x"$1" : "$EXPR"` ;;
        +*)     EXPR='..\(.*\)' ; delay=`expr x"$1" : "$EXPR"` ;;
        *)      break ;;
        esac
        shift
done

case $# in
0)      echo "$prog: $usage" >&2 ; exit 2 ;;
esac

(
        for t in $timeout $delay
        do
                while (( $t > $interval ))
                do
                        sleep $interval
                        kill -0 $$ || exit
                        t=$(( $t - $interval ))
                done
                sleep $t
                kill $SIG $$ && kill -0 $$ || exit
                SIG=-KILL
        done
) 2> /dev/null &

exec "$@"
======================================================




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