Function SysGetProcessInfo

Kernel/src/arch/x86_64/syscalls.cpp:1788–1817

//////////////////////// \brief SysGetProcessInfo (pid, pInfo) \param pid - Process PID \param pInfo - Pointer to process_info_t structure \return On Success - Return 0 \return On Failure - Return error as negative value ////////////////////////

/// \return On Failure - Return error as negative value
/////////////////////////////
long SysGetProcessInfo(regs64_t* r){
	uint64_t pid = SC_ARG0(r);
	process_info_t* pInfo = reinterpret_cast<process_info_t*>(SC_ARG1(r));

	process_t* cProcess = Scheduler::GetCurrentProcess();
	if(!Memory::CheckUsermodePointer(SC_ARG1(r), sizeof(process_info_t), cProcess->addressSpace)){
		return -EFAULT;
	}

	process_t* reqProcess;
	if(!(reqProcess = Scheduler::FindProcessByPID(pid))){
		return -EINVAL;
	}

	pInfo->pid = pid;

	pInfo->threadCount = reqProcess->threadCount;

	pInfo->uid = reqProcess->uid;
	pInfo->gid = reqProcess->gid;

	pInfo->state = reqProcess->state;

	strcpy(pInfo->name, reqProcess->name);

	pInfo->runningTime = Timer::GetSystemUptime() - reqProcess->creationTime.seconds;
	pInfo->activeUs = reqProcess->activeTicks * 1000000 / Timer::GetFrequency();

	return 0;
}

/////////////////////////////
/// \brief SysGetNextProcessInfo (pidP, pInfo)