implement agent_release

src/agent_release/platform.hpp

@@ -0,0 +1,39 @@
+// platform.hpp — Linux substitutes for the Win32 calls used by
+// Agent_Release_x64.exe (see decomp/Agent_Release_x64/cpp/AgentProcessControl.cpp).
+#pragma once
+#include <sys/types.h>
+#include <functional>
+#include <string>
+
+namespace platform {
+
+// Replaces CreateMutexW(L"Global\\RustyHearts_Agent") (0x1400100b0).
+// Uses an exclusive flock() on a lock file; released automatically on exit.
+class SingleInstanceLock {
+public:
+    explicit SingleInstanceLock(const std::string& name);
+    ~SingleInstanceLock();
+    bool acquired() const { return fd_ >= 0; }
+private:
+    int fd_ = -1;
+};
+
+// Replaces CreateProcessW(..., CREATE_NEW_CONSOLE, ..., workDir) (0x1400094e0).
+// commandLine is split on whitespace (the original passes one string to Windows).
+// The child gets its own session (setsid) as the nearest analogue of a new console.
+// Returns pid > 0, or 0 on failure (same contract as the original).
+pid_t LaunchProcess(const std::string& commandLine, const std::string& workDir);
+
+// Replaces the watcher's GetExitCodeProcess polling loop (0x140008c90) with a
+// blocking waitpid(). Calls onExit(pid) on a detached thread once the child exits.
+void WatchProcess(pid_t pid, std::function<void(pid_t)> onExit);
+
+// Replaces Toolhelp32 + OpenProcess + TerminateProcess (0x140009780).
+// Scans /proc, matches basename of argv[0] case-insensitively, kills the FIRST
+// match with SIGKILL (TerminateProcess is unconditional), returns true if killed.
+bool KillProcessByName(const std::string& exeName);
+
+// Replaces Sleep(ms).
+void SleepMs(unsigned ms);
+
+} // namespace platform