81 lines
1.9 KiB
Bash
Executable File
81 lines
1.9 KiB
Bash
Executable File
#!/bin/sh
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#===============================================================================
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#
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# suspend
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#
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# Copyright (C) 2009-2014 by Digi International Inc.
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# All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 as published by
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# the Free Software Foundation.
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#
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#
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# !Description: suspend system to RAM
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#
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#===============================================================================
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scriptname="$(basename ${0})"
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syspower="/sys/power/state"
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usage() {
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printf "\nSuspend system to RAM memory\n"
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printf "\nUsage: ${scriptname} [OPTIONS]\n
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-h Show this help
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\n"
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}
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suspend_system_time() {
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if [ "$(echo /sys/class/rtc/rtc*)" != "/sys/class/rtc/rtc*" ]; then
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hwclock -w
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fi
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}
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suspend_interfaces() {
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# 'wlan0' interface on some platforms (ccwmx5xjs, cwme9210, ccardwmx28js)
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# has problems on suspend-resume, so we workaround it by bringing the
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# interface down before suspend and bring it up again after resume.
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# (#35777, #40082)
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if grep -qs '^wlan0' /var/run/ifstate; then
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ifdown wlan0 && up_wlan_on_resume="1"
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fi
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}
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resume_interfaces() {
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# 'wlan0' interface on some platforms (ccwmx5xjs, cwme9210, ccardwmx28js)
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# has problems on suspend-resume, so we workaround it by bringing the
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# interface down before suspend and bring it up again after resume.
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# (#35777, #40082)
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if ! grep -qs '^wlan0' /var/run/ifstate; then
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[ -n "${up_wlan_on_resume}" ] && ifup wlan0
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fi
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}
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resume_system_time() {
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if [ "$(echo /sys/class/rtc/rtc*)" != "/sys/class/rtc/rtc*" ]; then
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hwclock -s
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fi
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}
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while getopts "h" c; do
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case "${c}" in
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h) usage; exit;;
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esac
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done
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if [ -f "${syspower}" ]; then
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# Pre-suspend actions
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suspend_system_time
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suspend_interfaces
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# Suspend the device
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printf "mem" > ${syspower}
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sleep .5
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# Post-resume actions
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resume_interfaces
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resume_system_time
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else
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printf "\n[ERROR] File ${syspower} not found\n\n"
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fi
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