实现 ls 命令 (一)

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

void printDir(struct dirent *pdirent){
        printf("%s\t\t", pdirent->d_name);
        printf("%ld\t", pdirent->d_ino);
        printf("%ld\t", pdirent->d_off);
        printf("%d\t", pdirent->d_reclen);
        printf("%x\t\n", pdirent->d_type);
}


void printHelp(){
        printf("Usage : \n");
        printf("        myls [FILE_PATH]\n");
}

void printTableHead(){
        printf("[name]\t\t[inode]\t[offset]\t[length]\t[type]\n");

}

int main(int argc, char *argv[]){

        if (argc != 2){
                printHelp();
                exit(1);
        }

        DIR *pdir = opendir(argv[1]);

        if (pdir == NULL){
                printf("[-] opendir error!\n");
                exit(2);
        }

        printTableHead();

        struct dirent *pdirent;// = malloc(sizeof(struct dirent));

        while( (pdirent = readdir(pdir)) != NULL){
                printDir(pdirent);
        }

        return 0;
}