linux C 列出目錄中的文件列表 包含文件的相關信息

當前目錄下

任意指定目錄


 1 #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
/*遞歸遍歷目錄*/
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) { //通過文件名name獲取文件信息，並保存在st_buf所指的結構體stat中
        fprintf(stderr, "fsize:can not access to %s\n", name); //返回值:執行成功則返回0，失敗返回-1，錯誤代碼存於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;
}