如何判断文件夹中是否有重名的文件？

joe52 2007-03-22 01:33:36

请问如何用C语言，实现判断文件夹中是否有重名的文件？
我的重名是指不包括扩展名的文件名称

比如
00305.xml
00305.xml.zip

以上为重名的文件

如何判断呢？？
谢谢

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hu2020 2009-11-03

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強

orc1984 2007-03-22

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強帮顶

jixingzhong 2007-03-22

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比如第一个，
使用的链表结构，
对链表排序后，
比较相邻元素即可：

if(!strncpy(p->filename, p->next->filename, strlen(p->filename)))
printf("Find one filename: %s", p->filename);
p=p->next;

不想低调 2007-03-22

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jixingzhong 2007-03-22

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利用链表实现目录内所有文件列表显示

#include <stdio.h>
#include <dirent.h>
/*#include <alloc.h>*/
#include <string.h>

void main(int argc,char *argv[])
{
DIR *directory_pointer;
struct dirent *entry;
struct FileList
{
char filename[64];
struct FileList *next;
}start,*node;
if (argc!=2)
{
printf("Must specify a directory\n");
exit(1);
}
if ((directory_pointer=opendir(argv[1]))==NULL)
printf("Error opening %s\n",argv[1]);
else
{
start.next=NULL;
node=&start;
while ((entry=readdir(directory_pointer))!=NULL)
{
node->next=(struct FileList *)malloc(sizeof(struct FileList));
node=node->next;
strcpy(node->filename,entry->d_name);
node->next=NULL;
}
closedir(directory_pointer);
node=start.next;
while(node)
{
printf("%s\n",node->filename);
node=node->next;
}
}
}

==================================================
==================================================

linux下面的，作者不是我

A Demo written by camelrain

/*
the program find a file from current directory or your defined directory
commond optinon [path] filename
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <pwd.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

#define LENGTH 256

/* just if is a directory*/
static int IsDir (char * name);
/* search target file, arg1 is current path, arg2 is target file*/
static void search_file (char * path, char * name);

static int search_flag=0;

/*just if is a directory*/
static int IsDir (char * name) {
struct stat buff;

if (lstat(name,&buff)<0)
return 0; //if not exist name ,ignore

/*if is directory return 1 ,else return 0*/
return S_ISDIR(buff.st_mode);
}

/*search target file*/
static void search_file (char * path, char * name) {
DIR *directory;
struct dirent * dir_entry;
char buffer[LENGTH];

if ((directory=opendir(path)) == NULL) {
fprintf(stderr, "%s", path);
perror(" ");
return;
}

while (dir_entry=readdir(directory)) {
if (!strcmp(dir_entry->d_name,".")||!strcmp(dir_entry->d_name,"..")) {
/* do nothing*/
}
else {
/* if is boot directory add "/" */
if ((strcmp(path,"/"))==0)
sprintf(buffer,"%s%s",path,dir_entry->d_name);
/* if is not boot directory do not add "/"*/
else
sprintf(buffer,"%s/%s",path,dir_entry->d_name);

//printf("Now file : %s\n",buffer);
if (IsDir(buffer))
search_file (buffer , name);
else {
if (strcmp(dir_entry->d_name,name)==0)
{
printf("%s\n",buffer);
search_flag=1;
}
}
}
}
closedir(directory);
}

int main(int argc, char *argv[])
{
static char * current_dir;
static char * filename;
int length;

if (argc==1) {
printf("A few parameters!!\n");
return 0;
}

if (argc==2) {
current_dir=(char * )getcwd(current_dir,LENGTH);
filename=argv[1];
}

if (argc==3) {
length=strlen(argv[1]);

if (length>1 && (argv[1][length-1]=='/')) {
argv[1][length-1]='\0';
//printf("%d\n",strlen(argv[1]));
}

current_dir=argv[1];
filename=argv[2];
}

search_file(current_dir,filename);

if (!search_flag)
printf("Not found this(%s) file!\n",filename);

return 0;
}

jixingzhong 2007-03-22

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根据文件名使用 strcmp 排序.......
根据规则，00305.xml.zip 和 00305.xml 相邻（假设中间没有类似文件名）
00305.xml 的后面的一个有序元素就是 00305.xml.zip
然后，
根据比较函数：
strncmp()
int strncmp(const char *s1,const char *s2,size_t maxlen)
比较字符串s1与s2中的前maxlen个字符

s1 s2为传入的两个有序元素，
maxlen为 00305.xml（前面的元素）的长度

即可得到结果