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 1.2 2006/04/07 04:27:56 mlhuang Exp $
11 export PATH=/sbin:/bin:/usr/bin:/usr/sbin
13 # Source function library
14 . /etc/init.d/functions
16 # Source configuration if it exists
17 if [ -f /etc/planetlab/plc_config ] ; then
18 . /etc/planetlab/plc_config
21 # Total number of errors
24 # Count the exit status of the last command
27 ERRORS=$(($ERRORS+$?))
33 echo -n "PLC: $*: " >&3
39 if [ $ERRORS -eq 0 ] ; then
47 # Start up a program with a plc_ prefix
52 # See if it's already running. Look *only* at the pid file.
53 if [ -f /var/run/plc_${base}.pid ]; then
55 read line < /var/run/plc_${base}.pid
57 [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"
61 [ -n "${pid:-}" -a -z "${force:-}" ] && return
64 (exec -a plc_${base} $*)
67 if [ -f /var/run/${base}.pid ] ; then
68 mv /var/run/${base}.pid /var/run/plc_${base}.pid
74 # Print IP address of hostname if resolvable
77 perl -MSocket -e '($a,$b,$c,$d,@addrs) = gethostbyname($ARGV[0]); print inet_ntoa($addrs[0]) . "\n";' $1 2>/dev/null
80 # Print the CNAME of an SSL certificate
83 openssl x509 -noout -in $1 -subject | \
84 sed -n -e 's@.*/CN=\([^/]*\).*@\1@p'
87 # Forcefully make a symlink
90 mkdir -p $(dirname $2)
95 # Make copies of stdout and stderr. The plc initscript redirects
96 # stdout and stderr to a logfile if -v is not specified.
97 [ ! -e /dev/fd/3 ] && exec 3>&1
98 [ ! -e /dev/fd/4 ] && exec 4>&2