private static bool TryParseStatFile(string statFilePath, out ParsedStat result, ReusableTextReader reusableReader)
{
string statFileContents;
try
{
using (var source = new FileStream(statFilePath, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize: 1, useAsync: false))
{
statFileContents = 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(ParsedStat);
return false;
}
var parser = new StringParser(statFileContents, ' ');
var results = default(ParsedStat);
results.pid = parser.ParseNextInt32();
results.comm = parser.ParseRaw(delegate (string str, ref int startIndex, ref int endIndex)
{
if (str[startIndex] == '(')
{
int i;
for (i = endIndex; i < str.Length && str[i - 1] != ')'; i++) ;
if (str[i - 1] == ')')
{
endIndex = i;
return str.Substring(startIndex + 1, i - startIndex - 2);
}
}
throw new InvalidDataException();
});
results.state = parser.ParseNextChar();
parser.MoveNextOrFail(); // ppid
parser.MoveNextOrFail(); // pgrp
results.session = parser.ParseNextInt32();
parser.MoveNextOrFail(); // tty_nr
parser.MoveNextOrFail(); // tpgid
parser.MoveNextOrFail(); // flags
parser.MoveNextOrFail(); // majflt
parser.MoveNextOrFail(); // cmagflt
parser.MoveNextOrFail(); // minflt
parser.MoveNextOrFail(); // cminflt
results.utime = parser.ParseNextUInt64();
results.stime = parser.ParseNextUInt64();
parser.MoveNextOrFail(); // cutime
parser.MoveNextOrFail(); // cstime
parser.MoveNextOrFail(); // priority
results.nice = parser.ParseNextInt64();
parser.MoveNextOrFail(); // num_threads
parser.MoveNextOrFail(); // itrealvalue
results.starttime = parser.ParseNextUInt64();
results.vsize = parser.ParseNextUInt64();
results.rss = parser.ParseNextInt64();
results.rsslim = parser.ParseNextUInt64();
parser.MoveNextOrFail(); // startcode
parser.MoveNextOrFail(); // endcode
results.startstack = parser.ParseNextUInt64();
// The following lines are commented out as there's no need to parse through
// the rest of the entry (we've gotten all of the data we need). Should any
// of these fields be needed in the future, uncomment all of the lines up
// through and including the one that's needed. For now, these are being left
// commented to document what's available in the remainder of the entry.
//parser.MoveNextOrFail(); // kstkesp
//parser.MoveNextOrFail(); // kstkeip
//parser.MoveNextOrFail(); // signal
//parser.MoveNextOrFail(); // blocked
//parser.MoveNextOrFail(); // sigignore
//parser.MoveNextOrFail(); // sigcatch
//parser.MoveNextOrFail(); // wchan
//parser.MoveNextOrFail(); // nswap
//parser.MoveNextOrFail(); // cnswap
//parser.MoveNextOrFail(); // exit_signal
//parser.MoveNextOrFail(); // processor
//parser.MoveNextOrFail(); // rt_priority
//parser.MoveNextOrFail(); // policy
//parser.MoveNextOrFail(); // delayacct_blkio_ticks
//parser.MoveNextOrFail(); // guest_time
//parser.MoveNextOrFail(); // cguest_time
result = results;
return true;
}
private static bool TryParseStatFile(string statFilePath, out ParsedStat result, ReusableTextReader reusableReader)
{
string statFileContents;
try
{
using (var source = new FileStream(statFilePath, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize: 1, useAsync: false))
{
statFileContents = 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(ParsedStat);
return false;
}
var parser = new StringParser(statFileContents, ' ');
var results = default(ParsedStat);
results.pid = parser.ParseNextInt32();
results.comm = parser.ParseRaw(delegate (string str, ref int startIndex, ref int endIndex)
{
if (str[startIndex] == '(')
{
int i;
for (i = endIndex; i < str.Length && str[i - 1] != ')'; i++) ;
if (str[i - 1] == ')')
{
endIndex = i;
return str.Substring(startIndex + 1, i - startIndex - 2);
}
}
throw new InvalidDataException();
});
results.state = parser.ParseNextChar();
parser.MoveNextOrFail(); // ppid
parser.MoveNextOrFail(); // pgrp
results.session = parser.ParseNextInt32();
parser.MoveNextOrFail(); // tty_nr
parser.MoveNextOrFail(); // tpgid
parser.MoveNextOrFail(); // flags
parser.MoveNextOrFail(); // majflt
parser.MoveNextOrFail(); // cmagflt
parser.MoveNextOrFail(); // minflt
parser.MoveNextOrFail(); // cminflt
results.utime = parser.ParseNextUInt64();
results.stime = parser.ParseNextUInt64();
parser.MoveNextOrFail(); // cutime
parser.MoveNextOrFail(); // cstime
parser.MoveNextOrFail(); // priority
results.nice = parser.ParseNextInt64();
parser.MoveNextOrFail(); // num_threads
parser.MoveNextOrFail(); // itrealvalue
results.starttime = parser.ParseNextUInt64();
results.vsize = parser.ParseNextUInt64();
results.rss = parser.ParseNextInt64();
results.rsslim = parser.ParseNextUInt64();
parser.MoveNextOrFail(); // startcode
parser.MoveNextOrFail(); // endcode
results.startstack = parser.ParseNextUInt64();
parser.MoveNextOrFail(); // kstkesp
parser.MoveNextOrFail(); // kstkeip
parser.MoveNextOrFail(); // signal
parser.MoveNextOrFail(); // blocked
parser.MoveNextOrFail(); // sigignore
parser.MoveNextOrFail(); // sigcatch
parser.MoveNextOrFail(); // wchan
parser.MoveNextOrFail(); // nswap
parser.MoveNextOrFail(); // cnswap
parser.MoveNextOrFail(); // exit_signal
parser.MoveNextOrFail(); // processor
parser.MoveNextOrFail(); // rt_priority
parser.MoveNextOrFail(); // policy
parser.MoveNextOrFail(); // delayacct_blkio_ticks
parser.MoveNextOrFail(); // guest_time
parser.MoveNextOrFail(); // cguest_time
result = results;
return true;
}
