用c语言实现linux文件操作命令mv,【Linux文件操作】使用c语言实现cp命令

好的，针对你的问题，我可以给出以下代码实现：

1. 实现mv命令：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#define BUF_SIZE 1024

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: mv <source_file> <destination_file>\n");
        exit(EXIT_FAILURE);
    }

    int src_fd = open(argv[1], O_RDONLY);
    if (src_fd == -1) {
        printf("Failed to open source file!\n");
        exit(EXIT_FAILURE);
    }

    int dest_fd = open(argv[2], O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
    if (dest_fd == -1) {
        printf("Failed to create destination file!\n");
        exit(EXIT_FAILURE);
    }

    char buf[BUF_SIZE];
    ssize_t num_read;
    while ((num_read = read(src_fd, buf, BUF_SIZE)) > 0) {
        if (write(dest_fd, buf, num_read) != num_read) {
            printf("Failed to write to destination file!\n");
            exit(EXIT_FAILURE);
        }
    }

    if (num_read == -1) {
        printf("Failed to read from source file!\n");
        exit(EXIT_FAILURE);
    }

    if (close(src_fd) == -1) {
        printf("Failed to close source file!\n");
        exit(EXIT_FAILURE);
    }

    if (close(dest_fd) == -1) {
        printf("Failed to close destination file!\n");
        exit(EXIT_FAILURE);
    }

    if (unlink(argv[1]) == -1) {
        printf("Failed to remove source file!\n");
        exit(EXIT_FAILURE);
    }

    printf("File moved successfully!\n");
    exit(EXIT_SUCCESS);
}

2. 实现cp命令：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#define BUF_SIZE 1024

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: cp <source_file> <destination_file>\n");
        exit(EXIT_FAILURE);
    }

    int src_fd = open(argv[1], O_RDONLY);
    if (src_fd == -1) {
        printf("Failed to open source file!\n");
        exit(EXIT_FAILURE);
    }

    int dest_fd = open(argv[2], O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
    if (dest_fd == -1) {
        printf("Failed to create destination file!\n");
        exit(EXIT_FAILURE);
    }

    char buf[BUF_SIZE];
    ssize_t num_read;
    while ((num_read = read(src_fd, buf, BUF_SIZE)) > 0) {
        if (write(dest_fd, buf, num_read) != num_read) {
            printf("Failed to write to destination file!\n");
            exit(EXIT_FAILURE);
        }
    }

    if (num_read == -1) {
        printf("Failed to read from source file!\n");
        exit(EXIT_FAILURE);
    }

    if (close(src_fd) == -1) {
        printf("Failed to close source file!\n");
        exit(EXIT_FAILURE);
    }

    if (close(dest_fd) == -1) {
        printf("Failed to close destination file!\n");
        exit(EXIT_FAILURE);
    }

    printf("File copied successfully!\n");
    exit(EXIT_SUCCESS);
}

这两个程序使用了Linux系统调用实现文件操作，可以在Linux环境下编译运行。其中mv命令实现了文件的移动，即将源文件移动到目标文件位置并删除源文件；cp命令实现了文件的复制，即将源文件复制到目标文件位置。