Programmatically get time to sleep (and other energy-saving settings) on Mac OS X

Question

I would like to programmatically get the Energy Saver settings in System Preferences on Mac OS X, paticularly, the "Display Sleep" or "Computer Sleep" settings for the small application I'm writing.

I know that you can get sleep settings, for example, using the command line from this SO answer

pmset -g | grep "^[ ]*sleep" | awk '{ print $2 }' 

which prints 60 (my correct sleep time), but I would rather use my own API to get these parameters, if possible. Unfortunately, so far my search engine has not found anything useful. NSUserDefaults was the closest I received, but I could not figure out how to use this to get the settings I needed.

Anyone who can help?

Answer 1

Yes, more than 4 years have passed since this question was asked ... It is unclear in which language the code is needed. Using Objective-C.

Energy saving settings are located in:

 /Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist 

In the Mac application, we can now use:

 NSString *powerMgt = @"/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist"; NSDictionary *power = [NSDictionary dictionaryWithContentsOfFile:powerMgt]; // for example the sleep time on AC power NSNumber *sleepyTime = [[[power objectForKey:@"Custom Profile"] objectForKey:@"AC Power"] objectForKey:@"System Sleep Timer"]; 

with a dictionary similar to:

 { ActivePowerProfiles = { "AC Power" = "-1"; "Battery Power" = "-1"; }; "Custom Profile" = { "AC Power" = { "Disk Sleep Timer" = 10; "Display Sleep Timer" = 10; "Display Sleep Uses Dim" = 1; GPUSwitch = 2; "Hibernate File" = "/var/vm/sleepimage"; "Hibernate Mode" = 3; "Mobile Motion Module" = 1; PrioritizeNetworkReachabilityOverSleep = 0; "Standby Delay" = 4200; "Standby Enabled" = 0; "System Sleep Timer" = 0; TTYSPreventSleep = 1; "Wake On AC Change" = 0; "Wake On Clamshell Open" = 1; "Wake On LAN" = 1; }; "Battery Power" = { "Disk Sleep Timer" = 10; "Display Sleep Timer" = 10; "Display Sleep Uses Dim" = 1; GPUSwitch = 2; "Hibernate File" = "/var/vm/sleepimage"; "Hibernate Mode" = 3; "Mobile Motion Module" = 1; ReduceBrightness = 1; "Standby Delay" = 4200; "Standby Enabled" = 0; "System Sleep Timer" = 15; TTYSPreventSleep = 1; "Wake On AC Change" = 0; "Wake On Clamshell Open" = 1; }; }; } 

Answer 2

Looking at the source of pmset , I came to the following:

 #include <SystemConfiguration/SystemConfiguration.h> #include <CoreFoundation/CoreFoundation.h> #define kIOPMDynamicStoreSettingsKey "State:/IOKit/PowerManagement/CurrentSettings" #define kIOPMSystemSleepKey "System Sleep Timer" 

 SCDynamicStoreRef dynamicStore = SCDynamicStoreCreate(NULL, CFSTR("get-sleep-time"), NULL, NULL); CFDictionaryRef dictionaryRef = SCDynamicStoreCopyValue(dynamicStore, CFSTR(kIOPMDynamicStoreSettingsKey)); CFTypeRef typeRef = CFDictionaryGetValue(dictionaryRef, CFSTR(kIOPMSystemSleepKey)); int minutes; CFNumberGetValue(typeRef, kCFNumberIntType, (void *)&minutes); CFRelease(dynamicStore); CFRelease(dictionaryRef); CFRelease(typeRef); 

minutes will contain the computer sleep value in minutes.