Linux下C语言遍历文件夹
学习了LINUX下用C语言遍历文件夹，一些心得
struct dirent中的几个成员：
d_type：4表示为目录，8表示为文件
d_reclen：16表示子目录或文件，24表示非子目录
经过本人亲自试验发现：d_reclen：16表示子目录或以.开头的隐藏文件，24表示普通文本文件，28为二进制文件，等等
d_name：目录或文件的名称
具体代码如下，仅供参考
#include <stdio.h>
#include <dirent.h>
#include <sys/stat.h>
void List(char *path)
{
struct dirent* ent = NULL;
DIR *pDir;
pDir=opendir(path);
while (NULL != (ent=readdir(pDir)))
{
if (ent->d_reclen==24)
{
if (ent->d_type==8)
{
printf("普通文件:%s\n", ent->d_name);
}
else
{
printf("子目录：%s\n",ent->d_name);
List(ent->d_name);
printf("返回%s\n",ent->d_name);
}
}
}
}
int main(int argc, char *argv[])
{
List(argv[1]);
return 0;
}
上面函数修改后：
void List(char *path)
{
printf("路径为[%s]\n", path);
struct dirent* ent = NULL;
DIR *pDir;
pDir=opendir(path);
//d_reclen：16表示子目录或以.开头的隐藏文件，24表示普通文本文件,28为二进制文件，还有其他……
while (NULL != (ent=readdir(pDir)))
{
printf("reclen=%d type=%d\t", ent->d_reclen, ent->d_type);
if (ent->d_reclen==24)
{
//d_type：4表示为目录，8表示为文件
if (ent->d_type==8)
{
printf("普通文件[%s]\n", ent->d_name);
}
}
else if(ent->d_reclen==16)
{
printf("[.]开头的子目录或隐藏文件[%s]\n",ent->d_name);
}
else
{
printf("其他文件[%s]\n", ent->d_name);
}
}
}
转CU，地址：
http://blog.chinaunix.net/u/29024/showart_484896.html
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
void dir_scan(char *path, char *file);
int count = 0;
int main(int argc, char *argv[])
{
struct stat s;
if(argc != 2){
printf("one direction requried\n");
exit(1);
}
if(lstat(argv[1], &s) < 0){
printf("lstat error\n");
exit(2);
}
//判断一个路径是否是目录
if(!S_ISDIR(s.st_mode)){
printf("%s is not a direction name\n", argv[1]);
exit(3);
}
dir_scan("", argv[1]);
printf("total: %d files\n", count);
exit(0);
}
void dir_scan(char *path, char *file)
{
struct stat s;
DIR *dir;
struct dirent *dt;
char dirname[50];
memset(dirname, 0, 50*sizeof(char));
strcpy(dirname, path);
if(lstat(file, &s) < 0){
printf("lstat error\n");
}
if(S_ISDIR(s.st_mode)){
strcpy(dirname+strlen(dirname), file);
strcpy(dirname+strlen(dirname), "/");
if((dir = opendir(file)) == NULL){
printf("opendir %s/%s error\n");
exit(4);
}
if(chdir(file) < 0) {
printf("chdir error\n");
exit(5);
}
while((dt = readdir(dir)) != NULL){
if(dt->d_name[0] == '.'){
continue;
}
dir_scan(dirname, dt->d_name);
}
if(chdir("..") < 0){
printf("chdir error\n");
exit(6);
}
}else{
printf("%s%s\n", dirname, file);
count++;
}
}
linux c 下如何获得目录下的文件数目。
int main(int argc, char **argv)
{
DIR * pdir;
struct dirent * pdirent;
struct stat f_ftime;
int fcnt;/*文件数目统计*/
pdir=opendir("./");
if(pdir==NULL)
{ return(-1); }
fcnt=0;
for(pdirent=readdir(pdir);pdirent!=NULL;pdirent=readdir(pdir))
{
if(strcmp(pdirent->d_name,".")==0||strcmp(pdirent->d_name,"..")==0) continue;
if(stat(pdirent->d_name,&f_ftime)!=0) return -1 ;
if(S_ISDIR(f_ftime.st_mode)) continue; /*子目录跳过*/
fcnt++;
printf("文件:%s\n",pdirent->d_name);
}
printf("文件总数%d\n",fcnt);
closedir(pdir);
return 0;
}
#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
void printdir(char *dir, int depth)
{
DIR *dp;
struct dirent *entry;
struct stat statbuf;
if((dp = opendir(dir)) == NULL) {
fprintf(stderr, "cannot open directory: %s\n ", dir);
return;
}
chdir(dir);
while((entry = readdir(dp)) != NULL) {
lstat(entry-> d_name,&statbuf);
if(S_ISDIR(statbuf.st_mode)) {
/**//* Found a directory, but ignore . and .. */
if(strcmp( ". ",entry-> d_name) == 0 ||
strcmp( ".. ",entry-> d_name) == 0)
continue;
printf( "%*s%s/\n ",depth, " ",entry-> d_name);
/**//* Recurse at a new indent level */
printdir(entry-> d_name,depth+4);
}
else printf( "%*s%s\n ",depth, " ",entry-> d_name);
}
chdir( ".. ");
closedir(dp);
}
/**//* Now we move onto the main function. */
int main(int argc, char* argv[])
{
char *topdir, pwd[2]= ". ";
if (argc != 2)
topdir=pwd;
else
topdir=argv[1];
printf( "Directory scan of %s\n ",topdir);
printdir(topdir,0);
printf( "done.\n ");
exit(0);
}
