first commit: echo server

2026-09-07 00:45:35 +02:00
commit b15ce130f9
47 changed files with 2614 additions and 0 deletions
@@ -0,0 +1,61 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   FileDescriptor.hpp                                 :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: acossari <acossari@student.codam.nl>       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/08/24 16:24:03 by acossari          #+#    #+#             */
+/*   Updated: 2026/08/24 20:05:59 by acossari         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#pragma once
+
+#include <exception>
+#include <string>
+
+namespace webserv {
+
+// Sole owner of one file descriptor, move-only. Copying would give two owners
+// the same number, and the second close would land on whatever the kernel had
+// handed out in the meantime, killing an unrelated connection.
+class FileDescriptor final {
+  public:
+    class Error : public std::exception {
+      public:
+        explicit Error(std::string message);
+        const char* what() const noexcept override;
+
+      private:
+        std::string msg_;
+    };
+
+    FileDescriptor() = default;
+
+    // Takes ownership and sets FD_CLOEXEC, so a successful execve() in a
+    // forked child closes the descriptor before the new program starts. A
+    // negative fd is accepted and gives an invalid object instead of throwing,
+    // so the result of socket() can be passed in and checked with valid().
+    explicit FileDescriptor(int fd);
+
+    ~FileDescriptor();
+
+    FileDescriptor(const FileDescriptor&) = delete;
+    FileDescriptor& operator=(const FileDescriptor&) = delete;
+    FileDescriptor(FileDescriptor&& other) noexcept;
+    FileDescriptor& operator=(FileDescriptor&& other) noexcept;
+
+    int get() const noexcept { return fd_; }
+    bool valid() const noexcept { return fd_ >= 0; }
+
+    void setNonBlocking();
+
+    // Closes now instead of at destruction. Idempotent.
+    void reset() noexcept;
+
+  private:
+    int fd_ = -1;
+};
+
+}  // namespace webserv