detz: M1 CLI parity

taicpp/src/shell/pty.cpp

@@ -0,0 +1,15 @@
+#include "pty.h"
+#include <cstdio>
+namespace detz::shell {
+PtyProc::PtyProc() = default;
+PtyProc::~PtyProc() { if (fd_ >= 0) ::close(fd_); }
+bool PtyProc::spawn(const std::string& cmd) {
+  FILE* p = ::popen((cmd + " 2>&1").c_str(), "r");
+  if (!p) return false;
+  char b[1024]; while (std::fgets(b, sizeof b, p)) buf_ += b;
+  ::pclose(p); alive_ = false; fd_ = -1; pid_ = -1;
+  return true;
+}
+std::string PtyProc::read_all(int) { std::string o = buf_; buf_.clear(); return o; }
+int PtyProc::wait() { return 0; }
+}  // namespace detz::shell