linux c 获取目录文件列表

雨点打透心脏的1/2处 2021-07-28 18:30 555阅读 0赞

代码如下：

#include <stdio.h>
    #include <stdlib.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <unistd.h>
    #include <dirent.h>
    #include <string.h>
    
    #define MAX_PATH 1024
    
    //dirwalk: apply fcn to all files in dir
    /*递归遍历目录*/
    void dirwalk(char *dir, void (*fcn)(char *))
    {
        char name[MAX_PATH];
        struct dirent *dp;
        DIR *dfd;
    
        if ((dfd = opendir(dir)) == NULL) {
            fprintf(stderr, "dirwalk:can not open %s\n", dir);
            return;
        }
        while ((dp = readdir(dfd)) != NULL) {
            if ((strcmp(dp->d_name, ".") == 0) || (strcmp(dp->d_name, "..") == 0))
                continue; //skip self and parent
            if (strlen(dir)+strlen(dp->d_name)+2 > sizeof(name)) {
                fprintf(stderr, "dirwalk: name %s %s too long\n", dir, dp->d_name);
            } else {
                sprintf(name, "%s/%s", dir, dp->d_name);
                (*fcn)(name);
            }
        }
        closedir(dfd);
    }
    
    //fsize: print the size and name of the file "name"
    void fsize(char *name)
    {
        struct stat st_buf;
        if (stat(name, &st_buf) != 0) { //通过文件名name获取文件信息，并保存在st_buf所指的结构体stat中
            fprintf(stderr, "fsize:can not access to %s\n", name); //返回值:执行成功则返回0，失败返回-1，错误代码存于errno
            return;
        }
        if ((st_buf.st_mode & S_IFMT) == S_IFDIR) {
            dirwalk(name, fsize);
        }
        printf("%8ld %s\n", st_buf.st_size, name);
    }
    
    int main(int argc, char *argv[])
    {
        if (argc == 1) //default: current dir
            fsize(".");
        else 
            while (--argc > 0)
                fsize(*++argv);
        return 0;
    }

运行效果如下：

当前目录下

![format_png][]

任意指定目录

![format_png 1][]

[format_png]: /images/20210728/e7578bc1a1304e7c976f71ac8ae15b6a.png
[format_png 1]: /images/20210728/67c61a91e67e42a38c4bcdcd2e2ae010.png