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proc/1726/task/2405/root/usr/lib64/pm-utils/_[ Not.Writable ]

File://proc/1726/task/2405/root/usr/lib64/pm-utils/pm-functions

#!/bin/sh
# vim:noexpandtab


# Default values go here.  It is important to _not_ initialize some
# variables here.  They are:
#
# PM_CMDLINE
# RESUME_MODULES
#
# for great debugging!
[ "${PM_DEBUG}" = "true" ] && {
	export PM_DEBUG
	set -x
}
set -a
PM_UTILS_LIBDIR="/usr/lib64/pm-utils"
PM_UTILS_ETCDIR="/etc/pm"
PM_UTILS_RUNDIR="/var/run/pm-utils"

PATH=/sbin:/usr/sbin:/bin:/usr/bin:"${PM_UTILS_LIBDIR}"/bin
PM_LOGFILE="/var/log/${STASHNAME}.log"
TEMPORARY_CPUFREQ_GOVERNOR="performance"
LOCKDIR="${PM_UTILS_RUNDIR}/locks"
STORAGEDIR="${PM_UTILS_RUNDIR}/${STASHNAME}/storage"
NA=254
NX=253
DX=252
PM_FUNCTIONS="$PM_UTILS_LIBDIR/functions"
PM_QUIRKDB="$PM_UTILS_LIBDIR/video-quirks"
PM_LKW_QUIRKS="$PM_UTILS_ETCDIR/last_known_working.quirkdb"
# Use c sort order
LC_COLLATE=C

# These should be overridden by defaults and/or config.d settings.
# Specifically, distros should override these by modifying defaults,
# and end users should modify these using files in /etc/pm/config.
HIBERNATE_MODE=""
HIBERNATE_RESUME_POST_VIDEO="no"
SLEEP_MODULE="auto"
# These variables will be handled specially when we load the config file.
SUSPEND_MODULES=""
HOOK_BLACKLIST=""
ADD_PARAMETERS=""
DROP_PARAMETERS=""
PARAMETERS="${STORAGEDIR}/parameters"
INHIBIT="${STORAGEDIR}/inhibit"
PM_CMDLINE="$*"
BEFORE_HOOKS=""
MODULE_HELP=""
SUSPEND_MODULE=""
HIBERNATE_MODULE=""
SUSPEND_HYBRID_MODULE=""

# variables to handle hibernate after suspend support
PM_HIBERNATE_DELAY=900  # 15 minutes
PM_RTC=/sys/class/rtc/rtc0

# when loading configuration files, allow stash-specific ones
# to override the pm-utils global ones.
[ -f "${PM_UTILS_LIBDIR}"/defaults ] && . "${PM_UTILS_LIBDIR}"/defaults
[ -f "${PM_UTILS_LIBDIR}/${STASHNAME}.defaults" ] && \
    . "${PM_UTILS_LIBDIR}/${STASHNAME}.defaults"
set +a

for cfg in "${PM_UTILS_ETCDIR}"/config.d/*[!~] \
           "${PM_UTILS_ETCDIR}/${STASHNAME}.config.d"/*[!~]; do
	[ -f "$cfg" ] || continue
	# Ugly, I know. The goal here is to allow multiple files in
	# /etc/pm/config.d declare these variables and have those 
	# declarations add together instead of the last one overwriting
	# all the others.
	[ "$SUSPEND_MODULES" ] && REAL_SUSPEND_MODULES="$SUSPEND_MODULES"
	[ "$HOOK_BLACKLIST" ] && REAL_HOOK_BLACKLIST="$HOOK_BLACKLIST"
	[ "$ADD_PARAMETERS" ] && REAL_ADD_PARAMETERS="$ADD_PARAMETERS"
	[ "$DROP_PARAMETERS" ] && REAL_DROP_PARAMETERS="$DROP_PARAMETERS"
	set -a
	. "${cfg}"
	SUSPEND_MODULES="$REAL_SUSPEND_MODULES $SUSPEND_MODULES"
	HOOK_BLACKLIST="$REAL_HOOK_BLACKLIST $HOOK_BLACKLIST"
	ADD_PARAMETERS="$REAL_ADD_PARAMETERS $ADD_PARAMETERS"
	DROP_PARAMETERS="$REAL_DROP_PARAMETERS $DROP_PARAMETERS"
	set +a
done

. "${PM_FUNCTIONS}"

# Simple little logging function.
# We do it this way because 'echo -n' is not posix.
log()
{
	is_set "$LOGGING" || return 0;
	local fmt='%s\n'
	[ "$1" = "-n" ] && { fmt='%s'; shift; }
	printf "$fmt" "$*"
}

profiling() { [ "$PM_PROFILE" = "true" ]; }

if profiling; then
	profile() {
		local t1 t2 status msg elapsed
		msg="$1"
		shift
		t1="$(date '+%s.%N')"
		"$@"
		status=$?
		t2="$(date '+%s.%N')"
		elapsed="$(printf "%s %s - p q" "$t2" "$t1" |dc)"
		log "$msg: $(printf "%.3f" $elapsed) ($t2 - $t1)"
		return $status
	}

else
	profile() { shift; "$@"; }
fi

add_before_hooks() {
	[ -z "$BEFORE_HOOKS" ] && BEFORE_HOOKS="$*" || \
		BEFORE_HOOKS="$BEFORE_HOOKS $*"
}

add_module_help() {
	[ -z "$MODULE_HELP" ] && MODULE_HELP="$*" || \
		MODULE_HELP="$MODULE_HELP $*"
}

before_hooks()
{
	[ -z "$BEFORE_HOOKS" ] && return 0
	local meth
	for meth in $BEFORE_HOOKS; do
		command_exists "$meth" && "$meth"
	done
}

sleep_module_help()
{
	[ -z "$MODULE_HELP" ] && return 0
	local meth
	for meth in $MODULE_HELP; do
		command_exists "$meth" && "$meth"
	done
}

# update PM_CMDLINE iff someone changed our parameters
update_parameters()
{
	[ -f "$PARAMETERS.new" ] || return
	export PM_CMDLINE="$(get_parameters)"
	rm -f "$PARAMETERS.new"
}

# if the user asked us to blacklist any hooks, do it.
load_hook_blacklist()
{
	[ "$HOOK_BLACKLIST" ] || return
	local hook
	for hook in $HOOK_BLACKLIST; do
		disablehook "${hook}" "blacklisted by user"
		log "Blacklisting ${hook}."
	done
}

load_hook_parameters()
{
	[ "$DROP_PARAMETERS" ] && remove_parameters $DROP_PARAMETERS
	[ "$ADD_PARAMETERS" ]  && add_parameters $ADD_PARAMETERS
	update_parameters
}


hook_exit_status(){
	case $1 in
		0)   log "success." ;;
		$NA) log "not applicable." ;;
		$NX) log "not executable." ;;
		$DX) log "disabled." ;;
		*)   log "Returned exit code $1."; return 1 ;;
	esac
}

# check to see if a hook is a candidate for being run.
hook_ok()
{
	local hook="${1##*/}"
	# the actual name as passed to us.
	[ -f "$STORAGEDIR/disable_hook:$hook" ] && return $DX
	# name with leading digits chopped off the filename
	[ -f "$STORAGEDIR/disable_hook:${hook#[0-9][0-9]}" ] && return $DX
	[ -x "$1" ] || return $NX
	return 0
}

_run_hook() {
	# $1 = hook to run
	# rest of args passed to hook unchanged.
	local hook_status
	log "Running hook $*:"
	hook_ok "$1" && "$@"
	hook_status=$?
	log -n "$*: "
	hook_exit_status $hook_status && LAST_HOOK="${1##*/}" || inhibit
	log ""
}

if profiling; then
	run_hook() { profile "$1:" _run_hook "$@"; }
else
	run_hook() { _run_hook "$@"; }
fi

# Run all applicable hooks, logging success and failure as we go.
_run_hooks() {
	# $1 = type of hook to find.  
	# $2 = paramaters to pass to hooks.
	# $3 = if present and equal to "reverse", run hooks backwards.
	# Currently only power and sleep are meaningful.
	local syshooks="${PM_UTILS_ETCDIR}/$1.d"
	local phooks="${PM_UTILS_LIBDIR}/$1.d"
	command_exists before_hooks && before_hooks
	local sort="sort"
	local base
	local hook
	local oifs="${IFS}"
	# the next two lines are not a typo or a formatting error!
	local nifs="
"
	IFS="${nifs}" # tolerate spaces in filenames.
	[ "$3" = "reverse" ] && sort="sort -r"
	for base in $(IFS="${oifs}"; for f in "$syshooks/"*[!~] "$phooks/"*[!~];
		do [ -O "$f" ] && echo ${f##*/} ; done | $sort | uniq) ;
	do
		IFS="${oifs}"
		# if we are running backwards, skip hooks that we did not 
		# run going forwards due to a hook failing.
		[ "$3" -a "$3" = "reverse" -a "$LAST_HOOK" ] && \
		    [ "$base" \> "$LAST_HOOK" ] && continue
		# if we have already inhibited suspend/resume,
		# don't run any more hooks.
		[ ! "$3" ] && inhibited && break
		update_parameters
		if [ -f "$syshooks/$base" ]; then
			hook="$syshooks/$base"
		elif [ -f "$phooks/$base" ]; then
			hook="$phooks/$base"
		fi
		run_hook "$hook" $2
		IFS="${nifs}"
	done
	IFS="${oifs}"
	# return value is 1 if something was inhibited, 0 otherwise.
	inhibited && return 1 || return 0
}

if profiling; then
	run_hooks() { profile "$1 $2:" _run_hooks "$@"; }
else
	run_hooks() { _run_hooks "$@"; }
fi

# Try to reinitalize the logfile. Fail unless certian criteria are met.
init_logfile()
{
	if [ -z "$1" ]; then
		echo "Please pass a filename to init_logfile."
		return 1	
	elif [ -h "$1" ]; then
		echo "$1 is a symbolic link, refusing to overwrite."
		return 1
	elif [ -f "$1" -a ! -O "$1"  ]; then
		echo "We do not own $1, refusing to overwrite."
		return 1
	fi
	export LOGGING=true
	rm -f "$1"
	touch "$1"
	exec >> "$1" 2>&1
}

check_suspend() { [ -n "$SUSPEND_MODULE" ]; }
check_hibernate() { [ -n "$HIBERNATE_MODULE" ]; }
check_suspend_hybrid() { [ -n "$SUSPEND_HYBRID_MODULE" ]; }

# allow autodetection of sleep methods
if [ "$SLEEP_MODULE" = "auto" ]; then
    SLEEP_MODULE="tuxonice uswsusp"
fi

for mod in $SLEEP_MODULE; do
    mod="${PM_UTILS_LIBDIR}/module.d/${mod}"
    [ -f "$mod" ] || continue
    . "$mod"
done

# always fall back to kernel methods if nothing else was declared

if [ -z "$SUSPEND_MODULE" ]; then
	if grep -q mem /sys/power/state; then
		SUSPEND_MODULE="kernel"
		do_suspend() { echo -n "mem" >/sys/power/state; }
	elif [ -c /dev/pmu ] && pm-pmu --check; then
		SUSPEND_MODULE="kernel"
		do_suspend() { pm-pmu --suspend; }
	elif grep -q standby /sys/power/state; then
		SUSPEND_MODULE="kernel"
		do_suspend() { echo -n "standby" >/sys/power/state; }
	fi
fi

if [ -z "$HIBERNATE_MODULE" ] && \
	[ -f /sys/power/disk ] && \
	grep -q disk /sys/power/state; then
	HIBERNATE_MODULE="kernel"
	do_hibernate()
	{
		[ -n "${HIBERNATE_MODE}" ] && \
		grep -qw "${HIBERNATE_MODE}" /sys/power/disk && \
		HIBERNATE_MODE_SAVE=$(cat /sys/power/disk) && \
		HIBERNATE_MODE_SAVE="${HIBERNATE_MODE_SAVE##*[}" && \
		HIBERNATE_MODE_SAVE="${HIBERNATE_MODE_SAVE%%]*}" && \
		echo -n "${HIBERNATE_MODE}" > /sys/power/disk
		echo -n "disk" > /sys/power/state
		RET=$?
		echo -n "$HIBERNATE_MODE_SAVE" > /sys/power/disk
		return "$RET"
	}
fi

# for kernels that support suspend to both (i.e. hybrid suspend)
# since kernel 3.6
if [ -z "$SUSPEND_HYBRID_MODULE" ] && \
	[ -f /sys/power/disk ] && \
	grep -q disk /sys/power/state && \
	grep -q suspend /sys/power/disk; then
	SUSPEND_HYBRID_MODULE="kernel"
	do_suspend_hybrid()
	{
		HIBERNATE_MODE="suspend"
		do_hibernate
	}
fi

# since the kernel does not directly support hybrid sleep, we do
# something else -- suspend and schedule an alarm to go into
# hibernate if we have slept long enough.
# Only do this if we do not need to do any special video hackery on resume
# from hibernate, though.
if [ -z "$SUSPEND_HYBRID_MODULE" -a -w "$PM_RTC/wakealarm" ] && \
    check_suspend && check_hibernate && ! is_set $HIBERNATE_RESUME_POST_VIDEO; \
    then
    SUSPEND_HYBRID_MODULE="kernel"
    do_suspend_hybrid() {
	WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))
	echo >"$PM_RTC/wakealarm"
	echo $WAKETIME > "$PM_RTC/wakealarm"
	if do_suspend; then
	    NOW=$(cat "$PM_RTC/since_epoch")
	    if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ]; then
		log "Woken by RTC alarm, hibernating."
		# if hibernate fails for any reason, go back to suspend.
		do_hibernate || do_suspend
	    else
		echo > "$PM_RTC/wakealarm"
	    fi
	else
	    # if we cannot suspend, just try to hibernate.
	    do_hibernate
	fi
    }
fi

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Regist : 09-12-2024	Expired : 01-12-2027