internal static bool TryReadStatusFile(int pid, out ParsedStatus result, ReusableTextReader reusableReader)
{
var isParsed = TryParseStatusFile(GetStatusFilePathForProcess(pid), out result, reusableReader);
Debug.Assert(!isParsed || result.Pid == pid,
"Expected process ID from status file to match supplied pid");
return(isParsed);
}
public ProcessInfo[] GetProcessInfos(IEnumerable <int> processIds, Func <ProcessInfo, bool> predicate)
{
var reusableReader = new ReusableTextReader();
return(processIds.Select(_ => CreateProcessInfo(_, reusableReader))
.Where(_ => _ != null && predicate(_))
.ToArray());
}
internal static bool TryParseStatusFile(string statusFilePath, out ParsedStatus result,
ReusableTextReader reusableReader)
{
string statusFileContents;
try
{
using (var source = new FileStream(statusFilePath, FileMode.Open, FileAccess.Read, FileShare.Read,
1, false))
{
statusFileContents = reusableReader.ReadAllText(source);
}
}
catch (IOException)
{
// Between the time that we get an ID and the time that we try to read the associated stat
// file(s), the process could be gone.
result = default;
return(false);
}
var results = default(ParsedStatus);
var dict = statusFileContents.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries)
.Select(_ => ToKeyValue(_, ':'))
.ToDictionary(_ => _.Key, _ => _.Value.Trim(' ', '\t'));
results.Name = dict.GetValueOrDefault("Name", string.Empty);
results.State = dict.GetValueOrDefault("State", " ")[0];
results.Ppid = int.Parse(dict.GetValueOrDefault("PPid", DefaultId));
results.Pid = int.Parse(dict.GetValueOrDefault("Pid", DefaultId));
var uids = dict.GetValueOrDefault("Uid", string.Empty).Split('\t');
if (uids.Length >= 2)
{
results.Ruid = int.Parse(uids[0]);
results.Euid = int.Parse(uids[1]);
}
else
{
results.Ruid = results.Euid = -1;
}
var gids = dict.GetValueOrDefault("Gid", string.Empty).Split('\t');
if (gids.Length >= 2)
{
results.Rgid = int.Parse(gids[0]);
results.Egid = int.Parse(gids[1]);
}
else
{
results.Ruid = results.Euid = -1;
}
result = results;
return(true);
}
private static ProcessInfo CreateProcessInfo(int pid, ReusableTextReader reusableReader = null)
{
if (reusableReader == null)
{
reusableReader = new ReusableTextReader();
}
if (!ProcFs.TryReadStatusFile(pid, out var result, reusableReader))
{
return(null);
}
ProcFs.TryReadExeFile(pid, out var exe);
ProcFs.TryReadCreationTime(pid, out var startTime);
return(CreateProcessInfo(result, exe, startTime));
}
