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Server IP : 52.223.31.75 / Your IP : 172.31.12.187 [ Reverse IP ]
Web Server : Apache/2.4.67 () OpenSSL/1.0.2k-fips PHP/7.4.33
System : Linux ip-172-31-14-184.eu-central-1.compute.internal 4.14.281-212.502.amzn2.x86_64 #1 SMP Thu May 26 09:52:17 UTC 2022 x86_64
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Directory : /usr/lib64/pm-utils/

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Current File : /usr/lib64/pm-utils/functions

#!/bin/sh
# vim:noexpandtab

# Common functionality for the hooks.

# If a variable is set to true, yes, 1, or is simply set with no value,
# return 0, otherwise return 1.
is_set()
{
    case ${1-UNSET} in
	true|yes|TRUE|YES|on|ON|1) return 0;;
	false|FALSE|no|NO|off|OFF|0) return 1;;
	*) return 2;;
    esac
}

# for great debugging!
is_set "${PM_DEBUG}" && set -x


# try to take the lock.  Fail if we cannot get it.
try_lock()
{
	# $1 = file to use as lockfile
	local lock="${LOCKDIR}/${1##*/}"

	# make sure the directory where the lockfile should be exists
	mkdir -p "${LOCKDIR}"
	touch "${lock}"
	exec 3<"${lock}"
	flock -x -n 3 || return 1
	return 0
}

# spin waiting for the lock with optional timeout.  
# return once we have it, or the timeout has expired
spin_lock()
{
	# $1 = lockfile
	# $2 = optional timeout (default is 60 secs)
	local lock="${LOCKDIR}/${1##*/}"
	local timeout="${2:-60}"

	mkdir -p "${LOCKDIR}"
	touch "${lock}"
	exec 3<"${lock}"
	flock -x -w "${timeout}" 3 || return 1
	return 0
}

# release the lock
release_lock()
{
	# $1 = lockfile
	local lock="${LOCKDIR}/${1##*/}"
	rm -f "${lock}"
	return $?
}

command_exists()
{
	# $1 = command to test for.  It can be an executable in the path,
	# a shell function, or a shell builtin.
	type "$1" >/dev/null 2>&1
	return $?
}

get_power_status()
{
	on_ac_power
	case "$?" in
		"0")    echo "ac" ;;
		"1")    echo "battery" ;;
		"255")  echo "error"
			return 1
			;;
	esac
	return 0
}

# TODO: Module loading and unloading is Linux-specific.  
# Look into modularizing this into an os-specific set of support routines.
_rmmod()
{
	if modprobe -r "$1"; then
		touch "${STORAGEDIR}/module:$1"
		return 0
	else
		log "# could not unload '$1', usage count was $2"
		return 1
	fi
}

# this recursively unloads the given modules and all that depend on it
# first parameter is the module to be unloaded
modunload()
{
	local MOD D C USED MODS I
	local UNL="$(echo $1 |tr - _)" RET=1 

	while read MOD D C USED D; do
		[ "$MOD" = "$UNL" ] || continue
		if [ "$USED" = "-" ]; then
			# no dependent modules, just try to remove this one.
			_rmmod "$MOD" $C
			RET=$?
		else
			# modules depend on this one.  try to remove them first.
			MODS=",${USED%,}"
			while [ -n "${MODS}" ]; do
				# try to unload the last one first
				MOD="${MODS##*,}"
				modunload $MOD && RET=0
				# prune the last one from the list
				MODS="${MODS%,*}"
			done
			# if we unloaded at least one module, then let's
			# try again!
			[ $RET -eq 0 ] && modunload $MOD
			RET=$?
		fi
		return $RET
	done < /proc/modules
	# if we came this far, there was nothing to do, 
	# the module is no longer loaded.
	return 0
}

# reload all the modules in no particular order.
# modprobe should take care of loading prerequisites for us.
modreload()
{
	for x in "${STORAGEDIR}"/module:* ; do
		[ -O "${x}" ] || continue
		modprobe "${x##*:}" >/dev/null 2>&1 || \
			log "Could not reload module ${x##*:}."

	done
}

# If the service command is not provided by the OS, we will fall back to
# ${PM_UTILS_LIBDIR)/bin/service.

stopservice()
{
	if service "$1" status 2>/dev/null | grep -q -e running -e started
	then
		touch "${STORAGEDIR}/service:$1"
		service "$1" stop
	fi
}

restartservice()
{
	[ -O "${STORAGEDIR}/service:$1" ] && service "$1" start
}

# Disable a hook.
disablehook()
{
	# $1 = name of hook to disable.
	# $2 = optional comment.
	echo "${2:-${0##*/}}" > "${STORAGEDIR}/disable_hook:${1##*/}"
}

# Save an arbitrary piece of state for later use.
# If called with just one argument, it reads stdin and saves it to a file.
# If called with 2 arguments, it saves $2 to a file.
savestate()
{
	# $1 = name of state to save
	# $2 (optional) State to save.  If omitted, save stdin.
	if [ -n "$2" ]; then
		echo "$2" > "${STORAGEDIR}/state:$1"
	else
		cat > "${STORAGEDIR}/state:$1"
	fi
}

# Check to see of a piece of state exists.
state_exists()
{
	# $1 = name of state
	[ -O "${STORAGEDIR}/state:$1" ]
}

# Output previously saved state to stdout.
restorestate()
{
	# $1 = name of state
	state_exists "$1" && cat "${STORAGEDIR}/state:$1"
}

# Inhibit suspend/resume and running any more hooks.
# Any parameters passed ti this function will be saved in the inhibit file.
inhibit()
{
    echo "$*" > "$INHIBIT"
}

# Are we inhibited?
inhibited()
{
    [ -f "$INHIBIT" ]
}

# If we were told by the user to ignore some parameters from HAL.
# remove parameters from our list
remove_parameters() {
	local p
	if [ "$1" = "all" ]; then
	    echo '' > "$PARAMETERS.new"
	else
	    echo '' >"$PARAMETERS.rm"
	    for p in "$@"; do
		echo "$p" >> "$PARAMETERS.rm"
	    done
	    # let grep do the dirty work.
	    grep -vxFf "$PARAMETERS.rm" "$PARAMETERS" > "$PARAMETERS.new"
	fi
	cp -f "$PARAMETERS.new" "$PARAMETERS"
}

# Add a parameter to our commandline parameters. 
add_parameters() {
	remove_parameters "$@" # no dups, please.
	for x in "$@"; do
	    echo "$x" >>"$PARAMETERS"
	done
}

# Get our commandline parameters
get_parameters() {
       cat "$PARAMETERS"
}

# check to see if a single parameter exists
has_parameter()
{
	for p in $(get_parameters); do
		[ "$p" = "$1" ] && return 0
	done
	return 1
}

# Like regular dbus-send, but returns $NA if the command fails for any reason.
dbus_send ()
{
	command dbus-send "$@" 2>/dev/null || return $NA
}

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AnonSec Team