This file is indexed.

/usr/lib/pm-utils/pm-functions is in pm-utils 1.4.1-13.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
#!/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/lib/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="/var/cache/pm-utils/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.
	log "Running hook $*:"
	hook_ok "$1" && "$@"
	# log() changes the return value, so save it for later
	local status=$?
	log -n "$*: " 
	hook_exit_status $status && LAST_HOOK="${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
	exec >> "$1" 2>&1
}

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


check_suspend_pmu()
{
	perl << EOF
sub PMU_IOC_CAN_SLEEP { 0x40044205; }
open PMU, '/dev/pmu' or die "open /dev/pmu: \$!";
\$p = pack 'l', 0;
ioctl PMU, &PMU_IOC_CAN_SLEEP, \$p or die "ioctl: \$!";
(\$v) = unpack 'l', \$p;
exit (\$v ? 0 : 1);
EOF
}

do_suspend_pmu()
{
	perl << EOF
sub PMU_IOC_SLEEP { 0x20004200; }
open PMU, "/dev/pmu" or die "open /dev/pmu: \$!";
ioctl PMU, &PMU_IOC_SLEEP, 0;
EOF
}

# 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 ] && check_suspend_pmu; then
		SUSPEND_MODULE="kernel"
		do_suspend() { do_suspend_pmu; }
	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