3 # Common functions for PLC startup/shutdown scripts
5 # Mark Huang <mlhuang@cs.princeton.edu>
6 # Copyright (C) 2006 The Trustees of Princeton University
8 # $Id: functions,v 1.1 2006/04/06 21:51:59 mlhuang Exp $
11 export PATH=/sbin:/bin:/usr/bin:/usr/sbin
13 # Source function library
14 . /etc/init.d/functions
16 # Source configuration
17 . /etc/planetlab/plc_config
19 # Total number of errors
22 # Count the exit status of the last command
25 ERRORS=$(($ERRORS+$?))
31 echo -n "PLC: $*: " >&3
37 if [ $ERRORS -eq 0 ] ; then
45 # Start up a program with a plc_ prefix
50 # See if it's already running. Look *only* at the pid file.
51 if [ -f /var/run/plc_${base}.pid ]; then
53 read line < /var/run/plc_${base}.pid
55 [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"
59 [ -n "${pid:-}" -a -z "${force:-}" ] && return
62 (exec -a plc_${base} $*)
65 if [ -f /var/run/${base}.pid ] ; then
66 mv /var/run/${base}.pid /var/run/plc_${base}.pid
72 # Print IP address of hostname if resolvable
75 perl -MSocket -e '($a,$b,$c,$d,@addrs) = gethostbyname($ARGV[0]); print inet_ntoa($addrs[0]) . "\n";' $1 2>/dev/null
78 # Print the CNAME of an SSL certificate
81 openssl x509 -noout -in $1 -subject | \
82 sed -n -e 's@.*/CN=\([^/]*\).*@\1@p'
85 # Forcefully make a symlink
88 mkdir -p $(dirname $2)
93 # Make copies of stdout and stderr. The plc initscript redirects
94 # stdout and stderr to a logfile if -v is not specified.
95 [ ! -e /dev/fd/3 ] && exec 3>&1
96 [ ! -e /dev/fd/4 ] && exec 4>&2