What does `/usr/lib/pm-utils/sleep.d/94cpufreq` try to do?

up vote
3
down vote

favorite

On my Ubuntu 16.04, I am trying to understand a system default file /usr/lib/pm-utils/sleep.d/94cpufreq (see the end of this post for its content.)

Is "$PM_FUNCTIONS" a script, given that it is sourced by .?

When I echo "$PM_FUNCTIONS" in bash, it outputs nothing. Is PM_FUNCTIONS defined in another script which calls the script?

Are savestate, state_exists, and restorestate functions defined in "$PM_FUNCTIONS"?

Is TEMPORARY_CPUFREQ_GOVERNOR" a variable defined in "$PM_FUNCTIONS"?

What does the script try to do upon suspend|hibernate and upon thaw|resume?

Thanks.

#!/bin/sh 
# Ensure cpu governor is set to something sane. 
# TODO: Which of the cpu governors is still insane? File bugs against 
# those that are. 

. "$PM_FUNCTIONS"

[ -d /sys/devices/system/cpu/ ] || exit $NA

hibernate_cpufreq()


thaw_cpufreq()
 continue
 restorestate "$x%%/*_governor" > "$x"
 done )


case "$1" in
 suspend|hibernate)
 hibernate_cpufreq
 ;;
 resume|thaw)
 thaw_cpufreq
 ;;
 *) exit $NA
 ;;
esac

edited Apr 2 at 23:09

asked Apr 2 at 23:03

Tim

22.6k63224401

add a commentÂ |Â

up vote
3
down vote

favorite

On my Ubuntu 16.04, I am trying to understand a system default file /usr/lib/pm-utils/sleep.d/94cpufreq (see the end of this post for its content.)

Is "$PM_FUNCTIONS" a script, given that it is sourced by .?

When I echo "$PM_FUNCTIONS" in bash, it outputs nothing. Is PM_FUNCTIONS defined in another script which calls the script?

Are savestate, state_exists, and restorestate functions defined in "$PM_FUNCTIONS"?

Is TEMPORARY_CPUFREQ_GOVERNOR" a variable defined in "$PM_FUNCTIONS"?

What does the script try to do upon suspend|hibernate and upon thaw|resume?

Thanks.

#!/bin/sh 
# Ensure cpu governor is set to something sane. 
# TODO: Which of the cpu governors is still insane? File bugs against 
# those that are. 

. "$PM_FUNCTIONS"

[ -d /sys/devices/system/cpu/ ] || exit $NA

hibernate_cpufreq()


thaw_cpufreq()
 continue
 restorestate "$x%%/*_governor" > "$x"
 done )


case "$1" in
 suspend|hibernate)
 hibernate_cpufreq
 ;;
 resume|thaw)
 thaw_cpufreq
 ;;
 *) exit $NA
 ;;
esac

edited Apr 2 at 23:09

asked Apr 2 at 23:03

Tim

22.6k63224401

add a commentÂ |Â

up vote
3
down vote

favorite

On my Ubuntu 16.04, I am trying to understand a system default file /usr/lib/pm-utils/sleep.d/94cpufreq (see the end of this post for its content.)

Is "$PM_FUNCTIONS" a script, given that it is sourced by .?

When I echo "$PM_FUNCTIONS" in bash, it outputs nothing. Is PM_FUNCTIONS defined in another script which calls the script?

Are savestate, state_exists, and restorestate functions defined in "$PM_FUNCTIONS"?

Is TEMPORARY_CPUFREQ_GOVERNOR" a variable defined in "$PM_FUNCTIONS"?

What does the script try to do upon suspend|hibernate and upon thaw|resume?

Thanks.

#!/bin/sh 
# Ensure cpu governor is set to something sane. 
# TODO: Which of the cpu governors is still insane? File bugs against 
# those that are. 

. "$PM_FUNCTIONS"

[ -d /sys/devices/system/cpu/ ] || exit $NA

hibernate_cpufreq()


thaw_cpufreq()
 continue
 restorestate "$x%%/*_governor" > "$x"
 done )


case "$1" in
 suspend|hibernate)
 hibernate_cpufreq
 ;;
 resume|thaw)
 thaw_cpufreq
 ;;
 *) exit $NA
 ;;
esac

edited Apr 2 at 23:09

asked Apr 2 at 23:03

Tim

22.6k63224401

On my Ubuntu 16.04, I am trying to understand a system default file /usr/lib/pm-utils/sleep.d/94cpufreq (see the end of this post for its content.)

Is "$PM_FUNCTIONS" a script, given that it is sourced by .?

When I echo "$PM_FUNCTIONS" in bash, it outputs nothing. Is PM_FUNCTIONS defined in another script which calls the script?

Are savestate, state_exists, and restorestate functions defined in "$PM_FUNCTIONS"?

Is TEMPORARY_CPUFREQ_GOVERNOR" a variable defined in "$PM_FUNCTIONS"?

What does the script try to do upon suspend|hibernate and upon thaw|resume?

Thanks.

#!/bin/sh 
# Ensure cpu governor is set to something sane. 
# TODO: Which of the cpu governors is still insane? File bugs against 
# those that are. 

. "$PM_FUNCTIONS"

[ -d /sys/devices/system/cpu/ ] || exit $NA

hibernate_cpufreq()


thaw_cpufreq()
 continue
 restorestate "$x%%/*_governor" > "$x"
 done )


case "$1" in
 suspend|hibernate)
 hibernate_cpufreq
 ;;
 resume|thaw)
 thaw_cpufreq
 ;;
 *) exit $NA
 ;;
esac

edited Apr 2 at 23:09

asked Apr 2 at 23:03

Tim

22.6k63224401

edited Apr 2 at 23:09

asked Apr 2 at 23:03

Tim

22.6k63224401

asked Apr 2 at 23:03

Tim

22.6k63224401

asked Apr 2 at 23:03

Tim

22.6k63224401

add a commentÂ |Â

1 Answer
1

active

oldest

votes

up vote
2
down vote

The functions state_exists, etc are defined in /usr/lib/pm-utils/functions and PM_FUNCTIONS refers to the script /usr/lib/pm-utils/pm-functions. And yes, TEMPORARY_CPUFREQ_GOVERNOR is defined in PM_FUNCTIONS.

answered Apr 2 at 23:24

J. Taylor

1,60211322

Thanks. How did you find them out by just looking at the file system? Where is PM_FUNCTIONS defined? How shall I find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called?
â€“Â Tim
Apr 2 at 23:30

You can find filenames using find or locate and then search the files using grep. For instance, to search for the variable TEMPORARY_CPUFREQ_GOVERNOR you can use the command grep -ri "TEMPORARY_CPUFREQ_GOVERNOR" /usr/lib/pm-utils
â€“Â J. Taylor
Apr 2 at 23:36

Thanks. I was wondering how to find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called? Under /usr/lib/pm-utils/, I run grep -R freq ., and it only return the file /usr/lib/pm-utils/sleep.d/94cpufreq, which is meaningless. I run grep -R sleep.d ., and it returns nothing useful either.
â€“Â Tim
Apr 2 at 23:39

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this: for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ; ... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

By the way, to find that, I used grep as follows: grep -ri '.d' /usr/lib/pm-utils/, which returned a couple of lines that looked like this: usr/lib/pm-utils/pm-functions: local syshooks="$PM_UTILS_ETCDIR/$1.d" I searched for ".d" in because since sleep.d wasn't showing up explicitly, I figured there was some kind of loop that went through all of the ".d" directories.
â€“Â J. Taylor
Apr 3 at 0:22

Â |Â
show 1 more comment

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);

);

draft saved

draft discarded

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f435150%2fwhat-does-usr-lib-pm-utils-sleep-d-94cpufreq-try-to-do%23new-answer', 'question_page');

);

Post as a guest

Name

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
2
down vote

answered Apr 2 at 23:24

J. Taylor

1,60211322

Thanks. How did you find them out by just looking at the file system? Where is PM_FUNCTIONS defined? How shall I find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called?
â€“Â Tim
Apr 2 at 23:30

You can find filenames using find or locate and then search the files using grep. For instance, to search for the variable TEMPORARY_CPUFREQ_GOVERNOR you can use the command grep -ri "TEMPORARY_CPUFREQ_GOVERNOR" /usr/lib/pm-utils
â€“Â J. Taylor
Apr 2 at 23:36

Thanks. I was wondering how to find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called? Under /usr/lib/pm-utils/, I run grep -R freq ., and it only return the file /usr/lib/pm-utils/sleep.d/94cpufreq, which is meaningless. I run grep -R sleep.d ., and it returns nothing useful either.
â€“Â Tim
Apr 2 at 23:39

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this: for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ; ... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

By the way, to find that, I used grep as follows: grep -ri '.d' /usr/lib/pm-utils/, which returned a couple of lines that looked like this: usr/lib/pm-utils/pm-functions: local syshooks="$PM_UTILS_ETCDIR/$1.d" I searched for ".d" in because since sleep.d wasn't showing up explicitly, I figured there was some kind of loop that went through all of the ".d" directories.
â€“Â J. Taylor
Apr 3 at 0:22

Â |Â
show 1 more comment

up vote
2
down vote

answered Apr 2 at 23:24

J. Taylor

1,60211322

Thanks. How did you find them out by just looking at the file system? Where is PM_FUNCTIONS defined? How shall I find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called?
â€“Â Tim
Apr 2 at 23:30

You can find filenames using find or locate and then search the files using grep. For instance, to search for the variable TEMPORARY_CPUFREQ_GOVERNOR you can use the command grep -ri "TEMPORARY_CPUFREQ_GOVERNOR" /usr/lib/pm-utils
â€“Â J. Taylor
Apr 2 at 23:36

Thanks. I was wondering how to find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called? Under /usr/lib/pm-utils/, I run grep -R freq ., and it only return the file /usr/lib/pm-utils/sleep.d/94cpufreq, which is meaningless. I run grep -R sleep.d ., and it returns nothing useful either.
â€“Â Tim
Apr 2 at 23:39

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this: for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ; ... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

By the way, to find that, I used grep as follows: grep -ri '.d' /usr/lib/pm-utils/, which returned a couple of lines that looked like this: usr/lib/pm-utils/pm-functions: local syshooks="$PM_UTILS_ETCDIR/$1.d" I searched for ".d" in because since sleep.d wasn't showing up explicitly, I figured there was some kind of loop that went through all of the ".d" directories.
â€“Â J. Taylor
Apr 3 at 0:22

Â |Â
show 1 more comment

up vote
2
down vote

answered Apr 2 at 23:24

J. Taylor

1,60211322

answered Apr 2 at 23:24

J. Taylor

1,60211322

answered Apr 2 at 23:24

J. Taylor

1,60211322

answered Apr 2 at 23:24

J. Taylor

1,60211322

answered Apr 2 at 23:24

J. Taylor

1,60211322

Thanks. How did you find them out by just looking at the file system? Where is PM_FUNCTIONS defined? How shall I find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called?
â€“Â Tim
Apr 2 at 23:30

You can find filenames using find or locate and then search the files using grep. For instance, to search for the variable TEMPORARY_CPUFREQ_GOVERNOR you can use the command grep -ri "TEMPORARY_CPUFREQ_GOVERNOR" /usr/lib/pm-utils
â€“Â J. Taylor
Apr 2 at 23:36

Thanks. I was wondering how to find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called? Under /usr/lib/pm-utils/, I run grep -R freq ., and it only return the file /usr/lib/pm-utils/sleep.d/94cpufreq, which is meaningless. I run grep -R sleep.d ., and it returns nothing useful either.
â€“Â Tim
Apr 2 at 23:39

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this: for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ; ... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

By the way, to find that, I used grep as follows: grep -ri '.d' /usr/lib/pm-utils/, which returned a couple of lines that looked like this: usr/lib/pm-utils/pm-functions: local syshooks="$PM_UTILS_ETCDIR/$1.d" I searched for ".d" in because since sleep.d wasn't showing up explicitly, I figured there was some kind of loop that went through all of the ".d" directories.
â€“Â J. Taylor
Apr 3 at 0:22

Â |Â
show 1 more comment

Thanks. How did you find them out by just looking at the file system? Where is PM_FUNCTIONS defined? How shall I find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called?
â€“Â Tim
Apr 2 at 23:30

You can find filenames using find or locate and then search the files using grep. For instance, to search for the variable TEMPORARY_CPUFREQ_GOVERNOR you can use the command grep -ri "TEMPORARY_CPUFREQ_GOVERNOR" /usr/lib/pm-utils
â€“Â J. Taylor
Apr 2 at 23:36

Thanks. I was wondering how to find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called? Under /usr/lib/pm-utils/, I run grep -R freq ., and it only return the file /usr/lib/pm-utils/sleep.d/94cpufreq, which is meaningless. I run grep -R sleep.d ., and it returns nothing useful either.
â€“Â Tim
Apr 2 at 23:39

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this: for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ; ... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

By the way, to find that, I used grep as follows: grep -ri '.d' /usr/lib/pm-utils/, which returned a couple of lines that looked like this: usr/lib/pm-utils/pm-functions: local syshooks="$PM_UTILS_ETCDIR/$1.d" I searched for ".d" in because since sleep.d wasn't showing up explicitly, I figured there was some kind of loop that went through all of the ".d" directories.
â€“Â J. Taylor
Apr 3 at 0:22

Thanks. How did you find them out by just looking at the file system? Where is PM_FUNCTIONS defined? How shall I find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called?
â€“Â Tim
Apr 2 at 23:30

You can find filenames using find or locate and then search the files using grep. For instance, to search for the variable TEMPORARY_CPUFREQ_GOVERNOR you can use the command grep -ri "TEMPORARY_CPUFREQ_GOVERNOR" /usr/lib/pm-utils
â€“Â J. Taylor
Apr 2 at 23:36

Thanks. I was wondering how to find out where /usr/lib/pm-utils/sleep.d/94cpufreq and /etc/pm/sleep.d/20_cpu_freq are called? Under /usr/lib/pm-utils/, I run grep -R freq ., and it only return the file /usr/lib/pm-utils/sleep.d/94cpufreq, which is meaningless. I run grep -R sleep.d ., and it returns nothing useful either.
â€“Â Tim
Apr 2 at 23:39

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this:

for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ;

... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

They are hooks that are run in the function _run_hooks() from the file pm-functions. Note the part that looks like this:

for base in $(IFS="$oifs"; for f in "$syshooks/"*[!~] "$phooks/"*[!~]; do [ -O "$f" ] && echo $f##*/ ; done | $sort | uniq) ;

... See How do I run commands on suspend/return from suspend?
â€“Â J. Taylor
Apr 3 at 0:14

By the way, to find that, I used grep as follows: grep -ri '.d' /usr/lib/pm-utils/, which returned a couple of lines that looked like this: usr/lib/pm-utils/pm-functions: local syshooks="$PM_UTILS_ETCDIR/$1.d" I searched for ".d" in because since sleep.d wasn't showing up explicitly, I figured there was some kind of loop that went through all of the ".d" directories.
â€“Â J. Taylor
Apr 3 at 0:22

Â |Â
show 1 more comment

draft saved

draft discarded

draft saved

draft discarded

Post as a guest

Name

搜尋此網誌

mjhjmtu