如何递归浏览文件夹并计算文件总大小

问题描述

我试图递归浏览目录并打印文件大小，然后最后打印所有文件大小的总和。我无法找出递归地传递给我的函数的内容，并且我的变量total最终还是不正确，非常感谢任何帮助，在此先感谢您。

I am trying to recursively go through my directories and print file size, then at the end print the total of all file size's. I cannot figure out what to pass my function recursively, and my variable total does not end up being correct,any help is greatly appreciated, thanks so much in advance.

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

void do_ls(char[]);
int total = 0;

int main(int ac, char *av[])
{
    if (ac == 1)
        do_ls(".");
    else
    {
        while (--ac) {
            printf("%s:\n", *++av);
            do_ls(*av);
        }
    }
}

void do_ls(char dirname[])
{
    DIR *dir_ptr;
    struct dirent *direntp;
    struct stat info;

    if ((dir_ptr = opendir(dirname)) == NULL)
        fprintf(stderr, "ls01: cannot opern %s\n", dirname);
    else
    {
        while((direntp = readdir(dir_ptr)) != NULL) {
            stat(direntp->d_name, &info);
            if (S_ISDIR(info.st_mode))
                printf("%s\n", direntp->d_name);
                //I believe recursion goes here, I tried the following
                //do_ls(direntp->d_name);
            else
                printf("%d %s\n", (int)info.st_size, direntp->d_name);
                total += (int)info.st_size;
        }
        closedir(dir_ptr);
    }
    printf("Your total is: %d \n", total);
}

推荐答案

在此行：

while((direntp - readdir(dir_ptr)) != NULL)

您应该设置direntp，而不是减去（我认为）。

you should be setting direntp, not subtracting (I assume).

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