Updated NonResponding

hung.m

/**
 * compile using this:
 *  gcc -framework Carbon -framework Foundation ./hung.m -o hung
 *
 * Referenced from https://apple.stackexchange.com/a/424763/260619
 * Original source code https://github.com/jksoegaard/NonResponding
 * Original Author: jksoegaard
 **/

#import <Foundation/Foundation.h>
#import <Carbon/Carbon.h>
#include <ApplicationServices/ApplicationServices.h>

extern int _CGSDefaultConnection(void);
extern bool CGSEventIsAppUnresponsive(int connection, const ProcessSerialNumber *psn);

bool isNonResponding(pid_t pid)
{
    ProcessSerialNumber psn;
    if( GetProcessForPID(pid, &psn) )
        return 0;
            
    return CGSEventIsAppUnresponsive(_CGSDefaultConnection(), &psn);
}

int main(int argc, char *argv[]) {
    if (argc < 2) {
        printf("Usage: %s <pid>\n", argv[0]);
        return 1;
    }

    pid_t pid = atoi(argv[1]);

    bool is_responding = !isNonResponding(pid);

    if (is_responding) {
        printf("Process with pid %d is responding.\n", pid);
    } else {
        printf("Process with pid %d is not responding.\n", pid);
    }

    return 0;
}