scandir函数

/*
 ============================================================================
 Name : scandir.c
 Author :
 Version :
 Copyright : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include <ftw.h>
#include <unistd.h>
#include <stdlib.h>
int SelectFlies(const struct dirent *pDir) {
    return 1;
    int iPrefixLen = 0;
    int iSelectResult = 0;
    if (pDir == NULL) {
        printf("SelectFlies():input parameter is NULL!");
        return 0;
    }
    // 匹配文件前缀
    iPrefixLen = strlen("test"); // 前缀为 "Test_"
    iSelectResult = (0 == strncmp(pDir->d_name, "test", iPrefixLen));
    if (iSelectResult == 1) // 找到了匹配前缀的文件
    {
        return 1;
    } else {
        return 0;
    }
}

int main(void) {
    int szDirectory[256] = { 0 };
    int iRetValue = 0;
    struct dirent**namelist = NULL;
    int iLoopFlag = 0;
    memcpy(szDirectory, "./", strlen("./"));
    while (1) {
        fprintf(stdout, "\33[J");
        // 用 scandir 函数来选择文件 , 选出来的文件按照字母表顺序排列
        iRetValue = scandir((char *) szDirectory, &namelist, SelectFlies, alphasort);
        // 返回负值 , 是因为没有扫描目录 , 或扫描出错
        if (iRetValue < 0) {
            printf("Execscandir failed, please check!");
            return -1;
        }
        printf("The amount of scanded fileis:%d\n", iRetValue);
        // 将扫描到的文件打印出来
        for (iLoopFlag = 0; iLoopFlag < iRetValue; iLoopFlag++) {
            printf("Thescanded file %d is:%s\n", iLoopFlag + 1, namelist[iLoopFlag]->d_name);
            free(namelist[iLoopFlag]);
            fflush(0);
        }

        fprintf(stdout, "\33[1;1H");
        free(namelist);
        sleep(2);

    }
    return 0;
}