commit 8e54631e4bdc30be93e983d8d360c80c4a84a78c
Author: TolaMironcenko <mironcenkotola@gmail.com>
Date:   Fri Feb 13 18:01:07 2026 +0700

    initial commit

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..24fab55
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,6 @@
+BasedOnStyle: Google
+AllowShortFunctionsOnASingleLine: false
+SpaceAfterCStyleCast: true
+PointerBindsToType: false
+DerivePointerBinding: false
+IncludeBlocks: Preserve
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b8b284e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+build
+*.o
+sch
+schc
+.cache
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..70fb887
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required (VERSION 3.6)
+project(sch LANGUAGES C)
+
+set(CMAKE_C_STANDARD 23)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+FILE(GLOB_RECURSE SOURCES src/main.c)
+FILE(GLOB_RECURSE SOURCES_CLIENT src/client.c)
+
+add_executable(
+    sch
+    ${SOURCES}
+)
+add_executable(
+    schc
+    ${SOURCES_CLIENT}
+)
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..390f8f8
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,29 @@
+CC = gcc
+CFLAGS = -Wall -g -std=gnu2x
+LDFLAGS =
+LIBS =
+INCLUDES = -I./src/lib -I./src
+SRCS = src/main.c
+CSRCS = src/client.c
+OBJS = src/main.o
+COBJS = src/client.o
+TARGET = sch
+CTARGET = schc
+CROSS_COMPILE =
+
+all: $(TARGET) $(CTARGET)
+
+$(TARGET): $(OBJS)
+	$(CROSS_COMPILE)$(CC) $(LDFLAGS) $^ -o $@ $(LIBS)
+
+$(CTARGET): $(COBJS)
+	$(CROSS_COMPILE)$(CC) $(LDFLAGS) $^ -o $@ $(LIBS)
+
+%.o: %.c
+	$(CROSS_COMPILE)$(CC) $(CFLAGS) $(INCLUDES) -c $< -o $@
+
+clean:
+	rm -f $(OBJS) $(TARGET) $(CTARGET)
+
+test: $(TARGET)
+	bash ./tests.sh
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..2e47809
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,4 @@
+project('sch', 'c', default_options: ['cpp_std=c20'])
+include_dirs = include_directories('src')
+executable('sch', 'src/main.c', include_directories: include_dirs, install: true)
+executable('schc', 'src/client.c', include_directories: include_dirs, install: true)
diff --git a/src/client.c b/src/client.c
new file mode 100644
index 0000000..cf296a8
--- /dev/null
+++ b/src/client.c
@@ -0,0 +1,55 @@
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#define PORT 5555
+#define BUFFER_SIZE 1024
+
+int main() {
+  int sock;
+  struct sockaddr_in server_addr;
+  char buffer[BUFFER_SIZE];
+
+  sock = socket(AF_INET, SOCK_STREAM, 0);
+  if (sock < 0) {
+    perror("socket");
+    return 1;
+  }
+
+  server_addr.sin_family = AF_INET;
+  server_addr.sin_port = htons(PORT);
+  inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr);
+
+  if (connect(sock, (struct sockaddr *) &server_addr, sizeof(server_addr)) <
+      0) {
+    perror("connect");
+    return 1;
+  }
+
+  if (fork() == 0) {
+    // Процесс чтения
+    while (1) {
+      int valread = read(sock, buffer, BUFFER_SIZE);
+      if (valread > 0) {
+        buffer[valread] = '\0';
+        printf("%s", buffer);
+      }
+    }
+  } else {
+    char username[50];
+    fgets(username, 50, stdin);
+    username[strlen(username)-1] = '\0';
+    send(sock, username, 50, 0);
+    printf("username = %s\n", username);
+    // Процесс отправки
+    while (1) {
+      fgets(buffer, BUFFER_SIZE, stdin);
+      send(sock, buffer, strlen(buffer), 0);
+    }
+  }
+
+  return 0;
+}
diff --git a/src/colors.h b/src/colors.h
new file mode 100644
index 0000000..43cd64a
--- /dev/null
+++ b/src/colors.h
@@ -0,0 +1,61 @@
+#ifndef COLORS_H
+#define COLORS_H
+#define RESET "\033[0m"
+#define GREEN "\033[0;32m" // GREEN
+#define BLUE "\033[0;34m" // BLUE
+#define YELLOW "\033[1;33m" // YELLOW
+#define RED "\033[0;31m" // RED
+#define BLACK "\033[0;30m" // BLACK
+#define PURPLE "\033[0;35m" // PURPLE
+#define CYAN "\033[0;36m" // CYAN
+#define WHITE "\033[0;37m" // WHITE
+#define BBLACK "\033[1;30m"       // BLACK
+#define BRED "\033[1;31m"         // RED
+#define BGREEN "\033[1;32m"       // GREEN
+#define BYELLOW "\033[1;33m"      // YELLOW
+#define BBLUE "\033[1;34m"        // BLUE
+#define BPURPLE "\033[1;35m"      // PURPLE
+#define BCYAN "\033[1;36m"        // CYAN
+#define BWHITE "\033[1;37m"       // WHITE
+#define UBLACK "\033[4;30m"       // BLACK
+#define URED "\033[4;31m"         // RED
+#define UGREEN "\033[4;32m"       // GREEN
+#define UYELLOW "\033[4;33m"      // YELLOW
+#define UBLUE "\033[4;34m"        // BLUE
+#define UPURPLE "\033[4;35m"      // PURPLE
+#define UCYAN "\033[4;36m"        // CYAN
+#define UWHITE "\033[4;37m"       // WHITE
+#define ON_BLACK "\033[40m"       // BLACK
+#define ON_RED "\033[41m"         // RED
+#define ON_GREEN "\033[42m"       // GREEN
+#define ON_YELLOW "\033[43m"      // YELLOW
+#define ON_BLUE "\033[44m"        // BLUE
+#define ON_PURPLE "\033[45m"      // PURPLE
+#define ON_CYAN "\033[46m"        // CYAN
+#define ON_WHITE "\033[47m"       // WHITE
+#define IBLACK "\033[0;90m"       // BLACK
+#define IRED "\033[0;91m"         // RED
+#define IGREEN "\033[0;92m"       // GREEN
+#define IYELLOW "\033[0;93m"      // YELLOW
+#define IBLUE "\033[0;94m"        // BLUE
+#define IPURPLE "\033[0;95m"      // PURPLE
+#define ICYAN "\033[0;96m"        // CYAN
+#define IWHITE "\033[0;97m"       // WHITE
+#define BIBLACK "\033[1;90m"      // BLACK
+#define BIRED "\033[1;91m"        // RED
+#define BIGREEN "\033[1;92m"      // GREEN
+#define BIYELLOW "\033[1;93m"     // YELLOW
+#define BIBLUE "\033[1;94m"       // BLUE
+#define BIPURPLE "\033[1;95m"     // PURPLE
+#define BICYAN "\033[1;96m"       // CYAN
+#define BIWHITE "\033[1;97m"      // WHITE
+#define ON_IBLACK "\033[0;100m"   // BLACK
+#define ON_IRED "\033[0;101m"     // RED
+#define ON_IGREEN "\033[0;102m"   // GREEN
+#define ON_IYELLOW "\033[0;103m"  // YELLOW
+#define ON_IBLUE "\033[0;104m"    // BLUE
+#define ON_IPURPLE "\033[0;105m"  // PURPLE
+#define ON_ICYAN "\033[0;106m"    // CYAN
+#define ON_IWHITE "\033[0;107m"   // WHITE
+
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..3c8dfac
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,126 @@
+#include <arpa/inet.h>
+#include <asm-generic/socket.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#define PORT 5555
+#define MAX_CLIENTS 10
+#define BUFFER_SIZE 1024
+
+struct client_t {
+  int sock;
+  char username[50];
+};
+
+int main() {
+  int server_fd;
+  struct client_t clients[MAX_CLIENTS];
+  struct sockaddr_in address;
+  int addrlen = sizeof(address);
+  fd_set readfds;
+  char buffer[BUFFER_SIZE];
+
+  for (int i = 0; i < MAX_CLIENTS; i++) {
+    clients[i].sock = 0;
+    bzero(clients[i].username, sizeof(clients[i].username));
+  }
+
+  server_fd = socket(AF_INET, SOCK_STREAM, 0);
+  if (server_fd < 0) {
+    perror("socket");
+    exit(EXIT_FAILURE);
+  }
+
+  int opt = 1;
+  if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
+    perror("setsockopt");
+    exit(EXIT_FAILURE);
+  }
+
+  address.sin_family = AF_INET;
+  address.sin_addr.s_addr = INADDR_ANY;
+  address.sin_port = htons(PORT);
+
+  if (bind(server_fd, (struct sockaddr *) &address, sizeof(address)) < 0) {
+    perror("bind");
+    exit(EXIT_FAILURE);
+  }
+
+  if (listen(server_fd, 5) < 0) {
+    perror("listen");
+    exit(EXIT_FAILURE);
+  }
+
+  printf("Chat server started on port %d\n", PORT);
+
+  while (1) {
+    FD_ZERO(&readfds);
+    FD_SET(server_fd, &readfds);
+    int max_sd = server_fd;
+
+    for (int i = 0; i < MAX_CLIENTS; i++) {
+      int sd = clients[i].sock;
+      if (sd > 0) FD_SET(sd, &readfds);
+      if (sd > max_sd) max_sd = sd;
+    }
+
+    if (select(max_sd + 1, &readfds, NULL, NULL, NULL) < 0) {
+      perror("select");
+      exit(EXIT_FAILURE);
+    }
+
+    // Новое подключение
+    if (FD_ISSET(server_fd, &readfds)) {
+      int new_socket = accept(server_fd, (struct sockaddr *) &address,
+                              (socklen_t *) &addrlen);
+
+      printf("New connection: socket %d\n", new_socket);
+      read(new_socket, buffer, BUFFER_SIZE);
+
+      for (int i = 0; i < MAX_CLIENTS; i++) {
+        if (clients[i].sock == 0) {
+          clients[i].sock = new_socket;
+          strcpy(clients[i].username, buffer);
+          break;
+        }
+      }
+    }
+
+    // Сообщения от клиентов
+    for (int i = 0; i < MAX_CLIENTS; i++) {
+      int sd = clients[i].sock;
+      char sd_username[50];
+      bzero(sd_username, sizeof(sd_username));
+      strcpy(sd_username, clients[i].username);
+
+      if (FD_ISSET(sd, &readfds)) {
+        int valread = read(sd, buffer, BUFFER_SIZE);
+
+        if (valread == 0) {
+          printf("Client disconnected: socket %d\n", sd);
+          close(sd);
+          clients[i].sock = 0;
+          bzero(clients[i].username, sizeof(clients[i].username));
+        } else {
+          buffer[valread] = '\0';
+          printf("from_socket: %d\n", sd);
+          printf("from_username: %s\n", sd_username);
+          printf("Message: %s\n", buffer);
+
+          // Рассылка всем другим
+          for (int j = 0; j < MAX_CLIENTS; j++) {
+            if (clients[j].sock != 0 && clients[j].sock != sd) {
+              send(clients[j].sock, buffer, strlen(buffer), 0);
+            }
+          }
+        }
+      }
+    }
+  }
+
+  return 0;
+}