public IChildProcessStateHolder SpawnProcess(
ref ChildProcessStartInfoInternal startInfo,
string resolvedPath,
SafeHandle stdIn,
SafeHandle stdOut,
SafeHandle stdErr)
{
var arguments = startInfo.Arguments;
var environmentVariables = startInfo.EnvironmentVariables;
var workingDirectory = startInfo.WorkingDirectory;
Span <int> fds = stackalloc int[3];
int handleCount = 0;
uint flags = 0;
if (stdIn != null)
{
fds[handleCount++] = stdIn.DangerousGetHandle().ToInt32();
flags |= RequestFlagsRedirectStdin;
}
if (stdOut != null)
{
fds[handleCount++] = stdOut.DangerousGetHandle().ToInt32();
flags |= RequestFlagsRedirectStdout;
}
if (stdErr != null)
{
fds[handleCount++] = stdErr.DangerousGetHandle().ToInt32();
flags |= RequestFlagsRedirectStderr;
}
using var bw = new MyBinaryWriter(InitialBufferCapacity);
var stateHolder = UnixChildProcessState.Create();
try
{
bw.Write(0U); // Dummy length to be rewritten later
bw.Write(stateHolder.State.Token);
bw.Write(flags);
bw.Write(workingDirectory);
bw.Write(resolvedPath);
bw.Write((uint)(arguments.Count + 1));
bw.Write(resolvedPath);
foreach (var x in arguments)
{
bw.Write(x);
}
if (environmentVariables == null)
{
bw.Write(0U);
}
else
{
bw.Write((uint)environmentVariables.Count);
foreach (var(name, value) in environmentVariables)
{
bw.WriteEnvironmentVariable(name, value);
}
}
bw.RewritePrefixedLength();
var subchannel = _helperProcess.RentSubchannelAsync(default).AsTask().GetAwaiter().GetResult();