LINUX学习笔记：显示目录下的常规文件

源码：
//ListRegularFile.cpp  显示普通文件
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <string.h>

#ifdef _WIN32
    #define FLAG_FILE _S_IFREG
#else
    #define FLAG_FILE __S_IFREG
#endif

int main(int argc, char *argv[])
{
    if (2 != argc)
    {
        printf("Usage: ListFile SourceFolder\n");
        return 1;
    }
    DIR* pDir = NULL;
    struct dirent* ent = NULL;
    pDir = opendir(argv[1]);
    if (NULL == pDir)
    {
        printf("Source dir not exists!");
        return 1;
    }
    int nFolderLength = strlen(argv[1]);
    const int FILE_LENGTH = 1024;
    char FilePath[FILE_LENGTH];
    assert(nFolderLength<FILE_LENGTH);
    strncpy(FilePath, argv[1], nFolderLength);
    FilePath[nFolderLength] = '\0';
    int nFileNameLength;
    struct stat stFileInfo;
    while (NULL != (ent=readdir(pDir)))
    {
        //Copy File Name
        nFileNameLength = strlen(ent->d_name);
        assert(nFileNameLength + nFolderLength < FILE_LENGTH);
        strncpy(&FilePath[nFolderLength], ent->d_name, nFileNameLength);
        FilePath[nFolderLength + nFileNameLength] = '\0';
        //Check if is a file
        if (0 != stat(FilePath, &stFileInfo))
        {
            printf("\tGet file info failed!\n");
            continue;
        }
        if (stFileInfo.st_mode & FLAG_FILE)
        {
            printf("%s\n", ent->d_name);
        }
    }
    closedir(pDir);
    pDir = NULL;
    ent = NULL;
    return 1;
}

编译：
g++ -o ListRegularFile ListRegularFile.cpp
本程序也可以在WINDOWS下编译执行：g++ -o ListRegularFile.exe ListRegularFile.cpp

测试：
ListRegularFile ../

说明：
1、看#ifdef _WIN32处，WINDOWS下一些宏的定义和LINUX下不同
2、关于文件类型的定义，Linux下在<bits/stat.h>中，如下：
/* File types.  */
#define __S_IFDIR 0040000 /* Directory.  */
#define __S_IFCHR 0020000 /* Character device.  */
#define __S_IFBLK 0060000 /* Block device.  */
#define __S_IFREG 0100000 /* Regular file.  */
#define __S_IFIFO 0010000 /* FIFO.  */
#define __S_IFLNK 0120000 /* Symbolic link.  */
#define __S_IFSOCK 0140000 /* Socket.  */