antipopd.c

#include <stdio.h>
#include <unistd.h>
#include <sys/cdefs.h>

#include <AudioToolbox/AudioServices.h>
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/ps/IOPSKeys.h>
#include <IOKit/ps/IOPowerSources.h>

int IsNum(int c)
{
    return c >= '0' && c <= '9';
}

typedef int (*FFPred)(int);
int FindFirstOf(FILE *file, FFPred pred)
{
    if(!file || !pred)
    {
	return -1;
    }
    
    while(!feof(file))
    {
	int c = fgetc(file);
	if(pred(c))
	{
	    return c;
	}
    }

    return -1;
}

int OnAC()
{
    CFTypeRef blob = IOPSCopyPowerSourcesInfo();
    CFArrayRef ps = IOPSCopyPowerSourcesList(blob);
        
    CFDictionaryRef theDict = IOPSGetPowerSourceDescription(blob, CFArrayGetValueAtIndex(ps, 0));
    CFStringRef isCharging = CFDictionaryGetValue(theDict, CFSTR(kIOPSPowerSourceStateKey));

    int onAC = CFStringCompare(isCharging, CFSTR(kIOPSACPowerValue), 0) == 0;

    CFRelease(ps);
    CFRelease(blob);

    return onAC;
}

int main()
{
    /* Should be a single integer in the file:
     * 1 = AC only
     * !1 = AC or Battery
     */
    FILE *ac_file = fopen("/usr/local/share/antipop/ac_only", "r");
    int ac_only = 0;
    if(ac_file)
    {
	ac_only = FindFirstOf(ac_file, IsNum) - '0';
	fclose(ac_file);
    }

    SystemSoundID soundID;
    OSStatus result = AudioServicesCreateSystemSoundID
                        ( CFURLCreateWithFileSystemPath(NULL,
                            CFSTR("/Extra/share/antipop/silent.aiff"),
                            kCFURLPOSIXPathStyle, FALSE)
                        , &soundID );

    if(result != noErr)
    {
        printf("AudioServicesCreateSystemSoundID failed: %d\n", result);
        exit(1);
    }

    while(1)
    {
	if(!ac_only || OnAC())
	{
	    AudioServicesPlaySystemSound(soundID);
	}

	sleep(10);
    }

    result = AudioServicesDisposeSystemSoundID(soundID);
    if(result != noErr)
    {
        printf("AudioServicesDisposeSystemSoundID failed: %d\n", result);
        exit(1);
    }
}