Linux 系统编程--查看目录文件

1、打印目录下所有文件及文件夹

#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>

int main(int argc,char **argv)
{
DIR* pDir;
struct dirent* pDirInfo;

if (argc == 2)
{
if (0 != chdir(argv[1]))
{
printf ("error num is : %d\n",errno);
switch(errno)
{
case EACCES:
printf("search permission is denied for one of the components  of  path\n");
break;
case EIO:
printf ("I/O error occurred\n");
break;
case ENOENT:
printf("No such file or directory\n");
break;
case EPERM:
printf ("Operation not permitted\n");
break;
}
return errno;
}
pDir = opendir(argv[1]);
}
else
{
pDir = opendir(".");
}
//打印当前目录
printf ("current directory is : %s\n",getcwd(NULL,0));
if (NULL == pDir)
{
perror("open dir failed !");
return -1;
}
pDirInfo = readdir(pDir);
while (pDirInfo)
{
printf("--------------------------------\n");
printf("name: %s \n",pDirInfo->d_name);
pDirInfo = readdir(pDir); //遍历文件夹
}
closedir(pDir);
return 0;
}

2、遍历文件夹内容，包括子文件夹

//以树形结构的形式打印指定目录下的所有文件
#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <errno.h>

void printDir1(const char * path, unsigned int depth);

int main(int argc, char * *argv)
{
char *topDir = getcwd(NULL, 0);

if (argc == 2)
{
topDir = argv[1];
}

printf("遍历的目录为: %s\n", topDir);

printDir1(topDir, 0);
return 0;
}

void printDir1(const char * path, unsigned int depth)
{
DIR *pDir = opendir(path);

if (NULL == pDir)
{
perror("路径打开失败!");
return;
}

struct dirent *entry;
struct stat statbuf;

chdir(path);
char *curPath = getcwd(NULL,0);
if (!curPath)
{
perror("curPath == NULL ");
return;
}

while (NULL != (entry = readdir(pDir)))
{
stat(entry->d_name,&statbuf);

char *desPath = (char*)malloc(strlen(curPath) + strlen(entry->d_name) + 2);
sprintf(desPath,"%s/%s",curPath,entry->d_name);

if (S_ISDIR(statbuf.st_mode))
{
if ((strcmp(".",entry->d_name) == 0) || (strcmp("..",entry->d_name) == 0))
continue;
printf("%d级--这是目录: %s\n",depth,desPath);
printDir1(desPath,depth+1);
}
else
{
printf("%d级--这是文件: %s\n",depth,desPath);
}
free (desPath);
}
chdir("..");
closedir(pDir);
printf("\t*****%d级目录%s--遍历完成**********\n",depth,path);
}