readdir_r()读取目录内容

readdir()在多线程操作中不安全，Linux提供了readdir_r()实现多线程读取目录内容操作。

#include <stdio.h>

#include <stdlib.h>

#include <dirent.h>

int main(void)

{

    DIR* dirp;

    struct dirent *dp1=malloc(sizeof(struct dirent));

    struct dirent *dp2=malloc(sizeof(struct dirent));

    dirp=opendir(".");

    while(1)

    {

        if((readdir_r(dirp,dp1,&dp2))!=0)

        {

            perror("readdir_r");

            exit(EXIT_FAILURE);

        }

        if(dp2==NULL)

            break;

        if(dp2->d_name[0]==‘.‘)

            continue;

        printf("inode=%d\t",dp2->d_ino);

        printf("reclen=%d\t",dp2->d_reclen);

        printf("name=%s\n",dp2->d_name);

    }

    close(dirp);

    free(dp1);

    free(dp2);

    return 0;

}

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