帮我用c语言写一份用蓝牙简易的聊天系统

以下是一个简单的用 C 语言编写的基于蓝牙的聊天系统示例，需要使用到 BlueZ 蓝牙库和 ncurses 界面库：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
#include <ncurses.h>

#define MAX_MESSAGE_LEN 1024

void print_message(const char *message, int is_local) {
    attron(COLOR_PAIR(is_local ? 1 : 2));
    printw("%s\n", message);
    attroff(COLOR_PAIR(is_local ? 1 : 2));
    refresh();
}

void send_message(int socket_fd, const char *message) {
    if (write(socket_fd, message, strlen(message)) < 0) {
        perror("write");
        exit(1);
    }
    print_message(message, 1);
}

void receive_messages(int socket_fd) {
    char message[MAX_MESSAGE_LEN];
    while (1) {
        int bytes_read = read(socket_fd, message, MAX_MESSAGE_LEN - 1);
        if (bytes_read < 0) {
            perror("read");
            exit(1);
        } else if (bytes_read == 0) {
            break;
        }
        message[bytes_read] = '\0';
        print_message(message, 0);
    }
}

int main(int argc, char **argv) {
    if (argc < 2) {
        fprintf(stderr, "Usage: %s <bluetooth-address>\n", argv[0]);
        exit(1);
    }
    char *server_address_str = argv[1];

    // Initialize ncurses
    initscr();
    start_color();
    init_pair(1, COLOR_GREEN, COLOR_BLACK);
    init_pair(2, COLOR_MAGENTA, COLOR_BLACK);
    clear();

    // Create a Bluetooth socket
    int socket_fd = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
    if (socket_fd < 0) {
        perror("socket");
        exit(1);
    }

    // Bind the socket to a local Bluetooth address
    struct sockaddr_rc local_address = { 0 };
    local_address.rc_family = AF_BLUETOOTH;
    local_address.rc_bdaddr = *BDADDR_ANY;
    local_address.rc_channel = (uint8_t) 1;
    if (bind(socket_fd, (struct sockaddr *) &local_address, sizeof(local_address)) < 0) {
        perror("bind");
        exit(1);
    }

    // Connect to the remote Bluetooth device
    struct sockaddr_rc remote_address = { 0 };
    remote_address.rc_family = AF_BLUETOOTH;
    str2ba(server_address_str, &remote_address.rc_bdaddr);
    remote_address.rc_channel = (uint8_t) 1;
    if (connect(socket_fd, (struct sockaddr *) &remote_address, sizeof(remote_address)) < 0) {
        perror("connect");
        exit(1);
    }

    // Receive messages in a separate thread
    if (fork() == 0) {
        receive_messages(socket_fd);
        exit(0);
    }

    // Send messages from the main thread
    char message[MAX_MESSAGE_LEN];
    while (1) {
        getstr(message);
        send_message(socket_fd, message);
        memset(message, 0, MAX_MESSAGE_LEN);
    }

    // Close the socket and exit ncurses
    close(socket_fd);
    endwin();
    return 0;
}

编译命令：

gcc -Wall -o bluetooth_chat bluetooth_chat.c -lbluetooth -lncurses

运行命令：

./bluetooth_chat <bluetooth-address>

其中 `<bluetooth-address>` 是远程蓝牙设备的 MAC 地址。在程序运行后，你可以在终端中输入消息并发送给远程设备，同时也能接收来自远程设备发送的消息。