使用linux c语言编写文件传输工具,使用

Linux C语言编写文件传输工具，可以使用Socket编程实现。下面是一个简单的例子，演示了如何使用Socket在客户端和服务器之间传输文件。

1. 服务器端：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define PORT 8888
#define BUF_SIZE 1024

int main()
{
    int sockfd, newsockfd, len;
    struct sockaddr_in server_addr, client_addr;
    char buffer[BUF_SIZE];

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        perror("socket");
        exit(EXIT_FAILURE);
    }

    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    server_addr.sin_port = htons(PORT);

    if (bind(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("bind");
        exit(EXIT_FAILURE);
    }

    if (listen(sockfd, 5) == -1) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    printf("Server started, waiting for client...\n");

    while (1) {
        len = sizeof(client_addr);
        newsockfd = accept(sockfd, (struct sockaddr *)&client_addr, &len);
        if (newsockfd == -1) {
            perror("accept");
            exit(EXIT_FAILURE);
        }

        printf("Accepted connection from %s:%d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));

        FILE *fp = fopen("test.txt", "w");
        if (fp == NULL) {
            perror("fopen");
            exit(EXIT_FAILURE);
        }

        while (1) {
            int n = recv(newsockfd, buffer, BUF_SIZE, 0);
            if (n == -1) {
                perror("recv");
                exit(EXIT_FAILURE);
            } else if (n == 0) {
                printf("Connection closed by client\n");
                break;
            }
            fwrite(buffer, sizeof(char), n, fp);
        }

        fclose(fp);
        close(newsockfd);
    }

    close(sockfd);

    return 0;
}

2. 客户端：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define SERVER_IP "127.0.0.1"
#define PORT 8888
#define BUF_SIZE 1024

int main()
{
    int sockfd, len;
    struct sockaddr_in server_addr;
    char buffer[BUF_SIZE];

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        perror("socket");
        exit(EXIT_FAILURE);
    }

    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
    server_addr.sin_port = htons(PORT);

    if (connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("connect");
        exit(EXIT_FAILURE);
    }

    printf("Connected to server\n");

    FILE *fp = fopen("test.txt", "r");
    if (fp == NULL) {
        perror("fopen");
        exit(EXIT_FAILURE);
    }

    while (1) {
        int n = fread(buffer, sizeof(char), BUF_SIZE, fp);
        if (n == 0) {
            break;
        }
        int m = send(sockfd, buffer, n, 0);
        if (m == -1) {
            perror("send");
            exit(EXIT_FAILURE);
        }
    }

    fclose(fp);
    close(sockfd);

    return 0;
}

注意，这只是一个简单的示例代码，实际使用中还需要处理异常、关闭资源等。同时，需要注意的是，这种方式只适用于小文件传输，如果需要传输大文件，需要使用分块传输或者其他方式。