#!/bin/sh
# -*- sh -*-
# vim:ft=sh:ts=8:sw=4:noet
#
# Hibernate Script
# Copyright (C) 2004-2005 Bernard Blackham <bernard@blackham.com.au>
#
# The hibernate-script package is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, write to the Free Software Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
umask 077
USING_ZSH=
USING_BASH=
NEED_POSIX=
# For zsh sanity...
# allows splitting strings on whitespace in zsh.
setopt SH_WORD_SPLIT 2>/dev/null && USING_ZSH=1 || true
# allows sourced files to know they're sourced in zsh.
unsetopt FUNCTION_ARGZERO 2>/dev/null || true
# Detect bash and tell it not to be POSIX, because we like it better that way.
shopt > /dev/null 2>&1 && USING_BASH=1
[ -n "$USING_BASH" ] && set +o posix 2>/dev/null
[ -z "$USING_BASH$USING_ZSH" ] && NEED_POSIX=1
# We prefer to use dash if we've got it.
if [ -z "$NEED_POSIX" ] && [ -z "$TRIED_DASH" ] &&
command -v dash > /dev/null 2>&1 ; then
if [ "`basename $0`" = "$0" ] ; then
myself=`command -v $0` || myself=
elif [ -x "$0" ] ; then
myself=$0
fi
TRIED_DASH=1
export TRIED_DASH
[ -n "$myself" ] && exec dash $myself $*
fi
unset TRIED_DASH
SWSUSP_D="/etc/hibernate"
SCRIPTLET_PATH="$SWSUSP_D/scriptlets.d /usr/local/share/hibernate/scriptlets.d /usr/share/hibernate/scriptlets.d"
CONFIG_FILE="$SWSUSP_D/hibernate.conf"
EXE=`basename $0`
VERSION="1.10"
# Add these to the $PATH just in case.
PATH="$PATH:/sbin:/usr/sbin"
export PATH
# vecho N <echo params>: acts like echo but with verbosity control - If it's
# high enough to go to stdout, then it'll get logged as well. Else write it to
# the log file if it needs to. Otherwise, ignore it.
vecho() {
local v
v="$1"
shift
if [ "$v" -le $VERBOSITY ] ; then
echo $@
else
if [ "$v" -le $LOG_VERBOSITY -a "$LOGPIPE" != "cat" ] ; then
echo "$@" | $LOGPIPE > /dev/null
fi
fi
}
# vcat N <cat params>: acts like cat but with verbosity control - If it's
# high enough to go to stdout, then it'll get logged as well. Else write it to
# the log file if it needs to. Otherwise, ignore it.
vcat() {
local v
v="$1"
shift
if [ "$v" -le $VERBOSITY ] ; then
cat $@
else
if [ "$v" -le $LOG_VERBOSITY -a "$LOGPIPE" != "cat" ] ; then
cat $@ | $LOGPIPE > /dev/null
fi
fi
}
##############################################################################
### The following functions can be called safely from within scriptlets ######
##############################################################################
# AddSuspendHook NN name: Adds a function to the suspend chain. NN must be a
# number between 00 and 99, inclusive. Smaller numbers get called earlier on
# suspend.
AddSuspendHook() {
SUSPEND_BITS="$1$2\\n$SUSPEND_BITS"
}
SUSPEND_BITS=""
# AddResumeHook NN name: Adds a function to the resume chain. NN must be a number
# between 00 and 99, inclusive. Smaller numbers get called later on resume.
AddResumeHook() {
RESUME_BITS="$1$2\\n$RESUME_BITS"
}
RESUME_BITS=""
# AddConfigHandler <function name>: adds the given function to the chain of
# functions to handle extra configuration options.
AddConfigHandler() {
CONFIG_OPTION_HANDLERS="$CONFIG_OPTION_HANDLERS $1"
}
CONFIG_OPTION_HANDLERS=""
# AddOptionHandler <function name>: adds the given function to the chain of
# functions to handle extra command line options. The scriptlet must also
# register the options with AddShortOption or AddLongOption
AddOptionHandler() {
CMDLINE_OPTION_HANDLERS="$CMDLINE_OPTION_HANDLERS $1"
}
CMDLINE_OPTION_HANDLERS=""
# AddShortOption <option char>: adds the given option character to the
# list of possible short options. The option may be followed by : or ::
# (: for a mandatory parameter, :: for an optional parameter)
AddShortOption() {
EXTRA_SHORT_OPTS="$EXTRA_SHORT_OPTS$1"
}
EXTRA_SHORT_OPTS=""
# AddLongOption <option char>: adds the given option character to the
# list of possible long options. The option may be followed by : or ::
# (: for a mandatory parameter, :: for an optional parameter)
AddLongOption() {
EXTRA_LONG_OPTS="$EXTRA_LONG_OPTS,$1"
}
EXTRA_LONG_OPTS=""
# AddOptionHelp <option name> <option help>: Adds the given option name and
# help text to the help screen.
AddOptionHelp() {
[ -n "$DISABLE_HELP" ] && return
local ATEXT
local BIT
local WRAPPED_HELP
ATEXT=" $1"
[ -n "$CURRENT_SOURCED_SCRIPTLET" ] && ATEXT=`LeftRightPadText "$ATEXT" "[$CURRENT_SOURCED_SCRIPTLET]"`
WRAPPED_HELP="`echo \"$2\" | WrapHelpText`"
ATEXT="$ATEXT
$WRAPPED_HELP
"
CMDLINE_OPTIONS_HELP="$CMDLINE_OPTIONS_HELP$ATEXT"
}
CMDLINE_OPTIONS_HELP=""
# AddConfigHelp <item name> <item help>: Adds an option to the option help
# text. <item help> must only contain line breaks if a new paragraph really
# does want to be started. Text wrapping is taken care of.
AddConfigHelp() {
[ -n "$DISABLE_HELP" ] && return
local ATEXT
local WRAPPED_HELP
ATEXT=" $1"
[ -n "$CURRENT_SOURCED_SCRIPTLET" ] && ATEXT=`LeftRightPadText "$ATEXT" "[$CURRENT_SOURCED_SCRIPTLET]"`
WRAPPED_HELP="`echo \"$2\" | WrapHelpText`"
ATEXT="$ATEXT
$WRAPPED_HELP
"
CONFIGURATION_OPTIONS_HELP="$CONFIGURATION_OPTIONS_HELP$ATEXT"
}
CONFIGURATION_OPTIONS_HELP=""
# FindXServer: Tries to find a running X server on the system. If one is found,
# will set DISPLAY, XAUTHORITY and the XUSER variable, and return 0.
# Otherwise, returns 1.
FindXServer() {
[ -n "$FIND_X_SERVER_RESULT" ] && return $FIND_X_SERVER_RESULT
[ -z "$DISPLAY" ] && DISPLAY=:0
export DISPLAY
# See if we need to authenticate to this X server.
PATH=$PATH:/usr/bin/X11:/usr/X11R6/bin
export PATH
xhost=`command -v xhost 2>/dev/null`
if [ $? -ne 0 ] ; then
vecho 0 "$EXE: Could not find xhost program. Disabling X scriptlets."
FIND_X_SERVER_RESULT=1
return 1
fi
# Find a useful XAUTHORITY and ideally a username too if we can!
local xuser xauth xpid
for xpid in `pidof kwrapper ksmserver kdeinit gnome-session X XFree86 Xorg` ; do
# Ensure the process still exists, and we aren't hallucinating.
[ -d "/proc/$xpid/" ] || continue
xauth=`awk 'BEGIN{RS="\\000";FS="="}($1 == "XAUTHORITY"){print $2}' < /proc/$xpid/environ`
xhome=`awk 'BEGIN{RS="\\000";FS="="}($1 == "HOME"){print $2}' < /proc/$xpid/environ`
xuser=`/bin/ls -ld /proc/$xpid/ | awk '{print $3}'`
[ -z $xauth ] && [ -n $xhome ] && [ -f $xhome/.Xauthority ] && xauth=$xhome/.Xauthority
XAUTHORITY=$xauth su $xuser -c "$xhost" > /dev/null 2>&1 && break
xauth=
xuser=
done
if [ -n $xuser ] ; then
XUSER=$xuser
if [ -n "$xauth" ] ; then
XAUTHORITY=$xauth
export XAUTHORITY
fi
else
FIND_X_SERVER_RESULT=1
vecho 0 "$EXE: Could not attach to X server on $DISPLAY. Disabling X scriptlets."
return 1
fi
FIND_X_SERVER_RESULT=0
return 0
}
# UsingSuspendMethod <method name>: is called when a suspend method is chosen.
# If a suspend method has already been chosen, the hibernate script will be
# terminated with an error.
UsingSuspendMethod() {
if [ -n "$HIBERNATE_SUSPEND_METHOD" ] ; then
vecho 0 "$EXE: More than one suspend method has been chosen."
vecho 0 "Please edit your config file so only one method is used."
exit 1
fi
HIBERNATE_SUSPEND_METHOD=$1
return 0
}
##############################################################################
### Helper functions ###
##############################################################################
# SortSuspendBits: Returns a list of functions registered in the correct order
# to call for suspending, prefixed by their position number in the suspend
# chain.
SortSuspendBits() {
# explicit path required to be ash compatible.
/bin/echo -ne "$SUSPEND_BITS" | sort -n
}
# SortResumeBits: Returns a list of functions registered in the correct order
# to call for resuming, prefixed by their position number.
SortResumeBits() {
# explicit path required to be ash compatible.
/bin/echo -ne "$RESUME_BITS" | sort -rn
}
# WrapHelpText: takes text from stdin, wraps it with an indent of 5 and width
# of 70, and writes to stdout.
WrapHelpText() {
awk '
BEGIN {
indent=5
width=70
ORS=""
}
{
if (substr($0, 1, 1) == " ")
for(a=1;a<length($0);a++) {
if (substr($0,a,1) != " ") break
print " "
}
curpos=0
for (i=1; i <= NF; i++) {
if ($i != "" && i == 1) {
for (j=0; j < indent; j++) { print " " }
}
if (curpos + length($i) > width) {
curpos=0
print "\n"
for (j=0; j < indent; j++) { print " " }
}
print $i " "
curpos = curpos + length($i) + 1
}
print "\n"
}
END {
print "\n"
}
'
}
# LeftRightPadText <left> <right>": returns a string comprised of the two
# arguments with padding in between to make the string 78 characters long.
LeftRightPadText() {
(echo "$1" ; echo "$2") | awk '
BEGIN {
OFS=""; ORS="";
getline
print
a=78-length()
getline
for(a-=length(); a>=0; a--) {print " "}
print
}'
}
# PluginConfigOption <params>: queries all loaded scriptlets if they want to
# handle the given option. Returns 0 if the option was handled, 1 otherwise.
PluginConfigOption() {
local i
for i in $CONFIG_OPTION_HANDLERS ; do
$i $@ && return 0
done
return 1
}
# EnsureHavePrerequisites: makes sure we have all the required utilities to run
# the script. It exits the script if we don't.
EnsureHavePrerequisites() {
local i
for i in awk grep sort getopt basename ; do
if ! command -v $i > /dev/null; then
vecho 0 "Could not find required program \"$i\". Aborting."
exit 1
fi
done
# Improvise printf using awk if need be.
if ! command -v printf > /dev/null 2>&1 ; then
# This implementation fails on strings that contain double quotes.
# It does the job for the help screen at least.
printf() {
local AWK_FMT
local AWK_PARAMS
AWK_FMT="$1"
shift
AWK_PARAMS=""
for i in "$@" ; do
AWK_PARAMS="$AWK_PARAMS, \"$i\""
done
awk "BEGIN { printf ( \"$AWK_FMT\" $AWK_PARAMS ) }"
}
fi
# Improvise mktemp in case we need it too!
if ! command -v mktemp > /dev/null 2>&1 ; then
# Use a relatively safe equivalent of mktemp. Still suspectible to race
# conditions, but highly unlikely.
mktemp() {
local CNT
local D
local FN
CNT=1
while true ; do
D=`date +%s`
FN=/tmp/tmp.hibernate.$$$D$RANDOM$RANDOM$CNT
[ -f $FN ] && continue
touch $FN && break
CNT=$(($CNT+1))
done
echo $FN
}
fi
return 0
}
# Usage: dump the abridged usage options to stdout.
Usage() {
cat <<EOT
Usage: $EXE [options]
Activates software suspend and control its parameters.
$CMDLINE_OPTIONS_HELP
The following config file options are available (module name in brackets):
$CONFIGURATION_OPTIONS_HELP
Hibernate Script $VERSION (C) 2004 Bernard Blackham
EOT
return
}
# PluginGetOpt <params>: pass the given params to each scriplet in turn that
# requested parameters until one accepts them. Return 0 if a scriplet did
# accept them, and 1 otherwise.
PluginGetOpt() {
local opthandler
for opthandler in $CMDLINE_OPTION_HANDLERS ; do
$opthandler $* && return 0
done
return 1
}
# DoGetOpt <getopt output>: consume getopt output and set options accordingly.
DoGetOpt() {
local opt
local optdata
while [ -n "$*" ] ; do
opt="$1"
shift
case $opt in
-F|--config-file)
# Dealt with previously
shift
;;
-f|--force)
FORCE_ALL=1
;;
-k|--kill)
KILL_PROGRAMS=1
;;
--dry-run)
OPT_DRY_RUN=1
;;
-v|--verbosity)
OPT_VERBOSITY="${1#\'}"
OPT_VERBOSITY="${OPT_VERBOSITY%\'}"
EnsureNumeric "verbosity" $OPT_VERBOSITY && VERBOSITY="$OPT_VERBOSITY"
shift
;;
-q)
;;
--)
;;
*)
# Pass off to scriptlets See if there's a parameter given.
case $1 in
-*)
optdata=""
;;
*)
optdata=${1#\'}
optdata=${optdata%\'}
shift
esac
if ! PluginGetOpt $opt $optdata ; then
echo "Unknown option $opt on command line!"
exit 1
fi
;;
esac
done
}
# ParseOptions <options>: process all the command-line options given
ParseOptions() {
local opts
opts="`getopt -n \"$EXE\" -o \"Vhfksv:nqF:$EXTRA_SHORT_OPTS\" -l \"help,force,kill,verbosity:,dry-run,config-file:$EXTRA_LONG_OPTS\" -- \"$@\"`" || exit 1
DoGetOpt $opts
}
# CheckImplicitAlternateConfig <$0> : checks $0 to see if we should be
# implicitly using a different configuration file.
CheckImplicitAlternateConfig() {
local self
self=`basename $0`
case $self in
hibernate-*)
CONFIG_FILE="$SWSUSP_D/${self#hibernate-}.conf"
vecho 1 "Using implicit configuration file $CONFIG_FILE"
;;
*)
;;
esac
return 0
}
# PreliminaryGetopt <options> : detects a few command-line options that need to
# be dealt with before scriptlets and before other command-line options.
PreliminaryGetopt() {
local opt
local next_is_config
for opt in `getopt -q -o hF: -l help,config-file:,version -- "$@"` ; do
if [ -n "$next_is_config" ] ; then
CONFIG_FILE="${opt#\'}"
CONFIG_FILE="${CONFIG_FILE%\'}"
next_is_config=
fi
case $opt in
-h|--help) HELP_ONLY=1 ;;
-F|--config-file) next_is_config=1 ;;
--version)
echo "Hibernate Script $VERSION"
exit 0
;;
--) return 0 ;;
esac
done
return 0
}
# LoadScriptlets: sources all scriptlets in $SCRIPTLET_PATH directories
LoadScriptlets() {
local prev_pwd
local scriptlet
local scriptlet_name
local scriptlet_dir
local prev_path
CURRENT_SOURCED_SCRIPTLET=""
for scriptlet_dir in $SCRIPTLET_PATH ; do
[ -d "$scriptlet_dir" ] || continue
[ -z "`/bin/ls -1 $scriptlet_dir`" ] && continue
for scriptlet in $scriptlet_dir/* ; do
# Avoid editor backup files.
case "$scriptlet" in *~|*.bak) continue ;; esac
# Don't source a scriptlet by name more than once.
scriptlet_name="`basename $scriptlet`"
eval "prev_path=\"\${HAVE_SOURCED_SCRIPTLET_$scriptlet_name}\""
if [ -n "$prev_path" ] ; then
vecho 0 "$EXE: Scriptlet $scriptlet_name exists in both $scriptlet and $prev_path"
vecho 0 "$EXE: Cowardly refusing to load $scriptlet_name a second time."
continue
fi
eval "HAVE_SOURCED_SCRIPTLET_$scriptlet_name=$scriptlet"
# And now source it!
CURRENT_SOURCED_SCRIPTLET="$scriptlet_name"
. $scriptlet
done
done
if [ -z "$CURRENT_SOURCED_SCRIPTLET" ] ; then
echo "WARNING: No directories in scriptlet search path contained any scriptlets."
echo "Hence, this script probably won't do anything."
return 0
fi
CURRENT_SOURCED_SCRIPTLET=""
}
# BoolIsOn <option> <value>: converts a "boolean" to either 1 or 0, and takes
# into account yes/no, on/off, 1/0, etc. If it is not valid, it will complain
# about the option and exit. Note, the *opposite* is actually returned, as true
# is considered 0 in shell world.
BoolIsOn() {
local val
val=`echo $2|tr '[A-Z]' '[a-z]'`
[ "$val" = "on" ] && return 0
[ "$val" = "off" ] && return 1
[ "$val" = "true" ] && return 0
[ "$val" = "false" ] && return 1
[ "$val" = "yes" ] && return 0
[ "$val" = "no" ] && return 1
[ "$val" = "1" ] && return 0
[ "$val" = "0" ] && return 1
echo "$EXE: Invalid boolean value ($2) for option $1 in configuration file"
exit 1
}
IsANumber() {
case "$1" in *[!0-9]*|"") return 1 ;; esac
return 0
}
EnsureNumeric() {
IsANumber "$2" && return 0
echo "$EXE: Invalid numeric value ($2) for option $1 in configuration file"
exit 1
}
# ProcessConfigOption: takes a configuration option and its parameters and
# passes it out to the relevant scriptlet.
ProcessConfigOption() {
local option
local params
option=`echo $1|tr '[A-Z]' '[a-z]'`
shift
params="$@"
case $option in
alwaysforce)
[ -z "$FORCE_ALL" ] &&
BoolIsOn "$option" "$params" && FORCE_ALL=1
;;
alwayskill)
[ -z "$KILL_PROGRAMS" ] &&
BoolIsOn "$option" "$params" && KILL_PROGRAMS=1
;;
logfile)
[ -z "$LOGFILE" ] &&
LOGFILE="$params"
;;
logverbosity)
EnsureNumeric "$option" "$params" && LOG_VERBOSITY="$params"
;;
swsuspvt|hibernatevt)
EnsureNumeric "$option" "$params" && SWSUSPVT="$params"
;;
verbosity)
[ -z "$OPT_VERBOSITY" ] && EnsureNumeric "$option" "$params" &&
VERBOSITY="$params"
;;
distribution)
[ -z "$DISTRIBUTION" ] && DISTRIBUTION=`echo $params | tr '[A-Z]' '[a-z]'`
;;
xdisplay)
DISPLAY="$params"
export DISPLAY
;;
include)
if [ -r "$params" ]; then
ReadConfigFile "$params"
else
echo "$EXE: Unable to read configuration file $params (from Include directive)."
exit 1
fi
;;
*)
if ! PluginConfigOption $option $params ; then
echo "$EXE: Unknown configuration option ($option)"
exit 1
fi
;;
esac
return 0
}
# ReadConfigFile: reads in a configuration file from stdin and sets the
# appropriate variables in the script. Returns 0 on success, exits on errors
ReadConfigFile() {
local option params
local file_name="$1"
if [ ! -f "${file_name}" ] ; then
echo "WARNING: No configuration file found (${file_name})."
echo "This script probably won't do anything."
return 0
fi
while true ; do
# Doing the read this way allows means we don't require a new-line
# at the end of the file.
read option params
[ $? -ne 0 ] && [ -z "$option" ] && break
[ -z "$option" ] && continue
case $option in ""|\#*) continue ;; esac # avoids a function call (big speed hit)
ProcessConfigOption $option $params
done < ${file_name}
return 0
}
# AddInbuiltHelp: Documents the above in-built options.
AddInbuiltHelp() {
AddOptionHelp "-h, --help" "Shows this help screen."
AddOptionHelp "--version" "Shows the Hibernate Script version."
AddOptionHelp "-f, --force" "Ignore errors and suspend anyway."
AddOptionHelp "-k, --kill" "Kill processes if needed, in order to suspend."
AddOptionHelp "-v<n>, --verbosity=<n>" "Change verbosity level (0 = errors only, 3 = verbose, 4 = debug)"
AddOptionHelp "-F<file>, --config-file=<file>" "Use the given configuration file instead of the default ($CONFIG_FILE)"
AddOptionHelp "--dry-run" "Don't actually do anything."
AddConfigHelp "HibernateVT N" "If specified, output from the suspend script is redirected to the given VT instead of stdout."
AddConfigHelp "Verbosity N" "Determines how verbose the output from the suspend script should be:
0: silent except for errors
1: print steps
2: print steps in detail
3: print steps in lots of detail
4: print out every command executed (uses -x)"
AddConfigHelp "LogFile <filename>" "If specified, output from the suspend script will also be redirected to this file - useful for debugging purposes."
AddConfigHelp "LogVerbosity N" "Same as Verbosity, but controls what is written to the logfile."
AddConfigHelp "AlwaysForce <boolean>" "If set to yes, the script will always run as if --force had been passed."
AddConfigHelp "AlwaysKill <boolean>" "If set to yes, the script will always run as if --kill had been passed."
AddConfigHelp "Distribution <debian|fedora|mandrake|redhat|gentoo|suse|slackware>" "If specified, tweaks some scriptlets to be more integrated with the given distribution."
AddConfigHelp "Include <filename>" "Read configuration directives from the given file."
AddConfigHelp "XDisplay <display location>" "Specifies where scriptlets that use the X server should find one. (Default: :0)"
}
EnsureHaveRoot() {
if [ x"`id -u`" != "x0" ] ; then
echo "$EXE: You need to run this script as root."
exit 1
fi
return 0
}
# DoWork: Does the actual calling of scriptlet functions. We wrap this to make
# it easy to decide whether or not to pipe its output to $LOGPIPE or not.
DoWork() {
# Trap Ctrl+C
trap ctrlc_handler INT HUP
# Do everything we need to do to suspend. If anything fails, we don't
# suspend. Suspend itself should be the last one in the sequence.
local ret
local CHAIN_UP_TO
local bit
CHAIN_UP_TO=0
for bit in `SortSuspendBits` ; do
local new_CHAIN_UP_TO
new_CHAIN_UP_TO="`awk \"BEGIN{print substr(\\\"$bit\\\", 1, 2)}\"`" || break
[ -n "$new_CHAIN_UP_TO" ] && CHAIN_UP_TO=$new_CHAIN_UP_TO || continue
bit=${bit##$CHAIN_UP_TO}
vecho 1 "$EXE: [$CHAIN_UP_TO] Executing $bit ... "
[ -n "$OPT_DRY_RUN" ] && continue
$bit
ret="$?"
# A return value >= 2 denotes we can't go any further, even with --force.
if [ $ret -ge 2 ] ; then
# If the return value is 3 or higher, be silent.
if [ $ret -eq 2 ] ; then
vecho 1 "$EXE: $bit refuses to let us continue."
vecho 0 "$EXE: Aborting."
EXIT_CODE=2
fi
break
fi
# A return value of 1 means we can't go any further unless --force is used
if [ $ret -gt 0 ] && [ x"$FORCE_ALL" != "x1" ] ; then
vecho 0 "$EXE: Aborting suspend due to errors in $bit (use --force to override)."
EXIT_CODE=2
break
fi
if [ -n "$SUSPEND_ABORT" ] ; then
vecho 0 "$EXE: Suspend aborted by user."
EXIT_CODE=3
break
fi
done
# Resume and cleanup and stuff.
for bit in `SortResumeBits` ; do
THIS_POS="`awk \"BEGIN{print substr(\\\"$bit\\\", 1, 2)}\"`"
[ -z "$THIS_POS" ] && continue
bit=${bit##$THIS_POS}
[ "$THIS_POS" -gt "$CHAIN_UP_TO" ] && continue
vecho 1 "$EXE: [$THIS_POS] Executing $bit ... "
[ -n "$OPT_DRY_RUN" ] && continue
$bit
done
return $EXIT_CODE
}
ctrlc_handler() {
SUSPEND_ABORT=1
}
############################### MAIN #########################################
# Some starting values:
VERBOSITY=0
LOG_VERBOSITY=1
LOGPIPE="cat"
ERROR_TEXT=""
EnsureHavePrerequisites
EnsureHaveRoot
CheckImplicitAlternateConfig $0
# Test for options that will affect future choices (-h and -F currently)
PreliminaryGetopt "$@"
# Generating help text is slow. Avoid it if we can.
if [ -n "$HELP_ONLY" ] ; then
AddInbuiltHelp
LoadScriptlets
Usage
exit 0
fi
DISABLE_HELP=1
LoadScriptlets
ReadConfigFile "${CONFIG_FILE}"
ParseOptions "$@"
# Set a logfile if we need one.
[ -n "$LOGFILE" ] && LOGPIPE="tee -a -i $LOGFILE"
# Redirect everything to a given VT if we've been given one
if [ -n "$SWSUSPVT" ] && [ -c /dev/tty$SWSUSPVT ] ; then
exec >/dev/tty$SWSUSPVT 2>&1
fi
# Use -x if we're being really verbose!
[ $VERBOSITY -ge 4 ] && set -x
echo "Starting suspend at "`date` | $LOGPIPE > /dev/null
EXIT_CODE=0
if [ "$LOGPIPE" = "cat" ] ; then
DoWork
else
# Sigh. Our portable way to obtain exit codes has issues in bash, so if
# we're using bash, we do it the not-so-portable way :)
if [ -n "$USING_BASH" ] ; then
DoWork | $LOGPIPE
eval 'EXIT_CODE=${PIPESTATUS[0]}'
else
# Evilness required to pass the exit code back to us in a pipe.
trap "" INT
exec 3>&1
eval `
exec 4>&1 >&3 3>&-
{
DoWork 4>&-
echo "EXIT_CODE=$EXIT_CODE" >&4
} | $LOGPIPE`
fi
fi
echo "Resumed at "`date` | $LOGPIPE > /dev/null
exit $EXIT_CODE
# $Id: hibernate.sh 947 2005-07-13 14:16:06Z bernard $