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#pragma once
#include <string>
#include <optional>
#include <string_view>
#include <unistd.h>
using namespace std;
class Process {
string execname;
optional<string> stderrRedirect;
pid_t pid = -1;
int infd = -1, outfd = -1;
int exitStatus = -1;
string readBuf;
void cleanup();
public:
Process(const string_view execname);
Process(const Process&) = delete;
Process(Process&&) = default;
void redirectStderr(const string_view fname);
void run();
void stop();
void unStop();
// These return -1 if an error occurred, and the process return value otherwise.
// If the process was killed by a signal, (1000 + signal) is returned.
int wait();
int waitPoll(); // Also returns -1 if process hasn't finished yet
int terminate();
pid_t getPid() const;
bool writeLine(const string_view line, bool allowBrokenPipe);
optional<string> readLine();
optional<string> readLineTimeout(size_t millis);
};
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