/// <summary>
/// Get the Unix Process by searching the /proc files. The /proc directory is a virtual file system,
/// sometimes reffered to as the process information pseudo file system.It doesn't contain 'real' files but runtime system information.
/// Each of the numbered directories corresponds to an actual process ID. Details of this process can
/// be obtained by looking at the associated files in the directory for this process, for example /proc/460. Inside this folder we can find more directories:
/// - /proc/PID/cmdline for command line arguments that were used to lanch the process
/// - /proc/PID/stat for process status
/// </summary>
/// <returns></returns>
public static LinuxProcess[] GetProcesses()
{
const string PROC_DIR = "/proc";
IList <LinuxProcess> processList = new List <LinuxProcess>();
foreach (var directory in Directory.GetDirectories(PROC_DIR))
{
var directoryName = Path.GetFileName(directory);
//We want to search only through the files that are associated with a PID, that have
//filenames represented as numbers. So, if we can not convert it to an int, then we skip the
//directory
int pid;
bool isPidDirectory = int.TryParse(directoryName, out pid);
if (!isPidDirectory)
{
continue;
}
//Parse the process status file in order to get the filename of that lanched the process. If no stat
//file is present, than we skip and continue with the next directory
LinuxProcessStatusFile processStatusFile = ParseLinuxProcessStatusFile(pid);
if (processStatusFile == null)
{
continue;
}
//Build Linux process and add it to our result set
LinuxProcess linuxProcess = BuildProcess(processStatusFile);
processList.Add(linuxProcess);
}
return(processList.ToArray());
}
private static LinuxProcess BuildProcess(LinuxProcessStatusFile processStatusFile)
{
string processName = GetProcessName(processStatusFile);
LinuxProcess linuxProcess = new LinuxProcess(processStatusFile.Pid, processName);
return(linuxProcess);
}
public override void RefreshInformation()
{
foreach (var basicProcessInformation in BasicProcessList)
{
LinuxProcess p = LinuxProcess.GetProcesses().SingleOrDefault(x => x.ProcessName == basicProcessInformation.ProcessName);
basicProcessInformation.Refresh(p);
}
}
/// <summary>
/// Refresh the information about the associated Linux process.
/// </summary>
/// <param name="process">The associated process where the information is retrieved from</param>
public void Refresh(LinuxProcess process)
{
//if process can not be found, re-initialize all members of the process information object
if (process == null)
{
Pid = default(int); ;
StartDateTime = default(DateTime);
MemoryUsageMb = default(int);
UptimeInSeconds = default(int);
State = ProcessState.NotRunning;
return;
}
//else update the information of this object from the associated process
Pid = process.Id;
StartDateTime = process.StartTime;
MemoryUsageMb = (int)(process.WorkingSet64 / 1024 / 1024);
UptimeInSeconds = (int)(DateTime.Now - process.StartTime).TotalSeconds;
State = ProcessState.Running;
}
private static LinuxProcess BuildProcess(LinuxProcessStatusFile processStatusFile)
{
string processName = GetProcessName(processStatusFile);
LinuxProcess linuxProcess = new LinuxProcess(processStatusFile.Pid, processName);
return linuxProcess;
}
