删除旧文件

#include <stdio.h>
#include <fcntl.h> 
#include <time.h> 
#include <string.h>
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
 
#define FILE_MAX_LEN 256
 
void rmv_old_files(const char *path, const char *suf, int hours)
{	
	char filename[FILE_MAX_LEN] = {0};
	struct tm *TM;
	struct dirent *dirp;
	struct stat statbuf;
	DIR *dp = NULL;
	time_t curr_time;
	int nameLen, offset;
	char *chTemp = NULL;
	
	curr_time = time((time_t*)NULL);
	dp = opendir(path);
	if (NULL == dp)
	{
		return;
	}	
	while((dirp=readdir(dp)) != NULL)
	{
		if (strcmp(dirp->d_name, ".")==0 || strcmp(dirp->d_name, "..")==0)
		{
			continue;
		}
		nameLen = strlen(dirp->d_name);
		chTemp = dirp->d_name;
		if (*suf != '\0')
		{
			offset = nameLen-strlen(suf);
			if (offset<0 || strncmp(suf, chTemp+offset, strlen(suf))!=0)
			{
				continue;
			}
		}
		sprintf(filename, "%s%s", path, dirp->d_name);
		if (!stat(filename, &statbuf))
		{
			/*check the st_mtime of the file, if more than retention_hours ago then delete it*/
			if (curr_time-statbuf.st_mtime >= hours*3600 && S_ISREG(statbuf.st_mode))
			{
				unlink(filename);
			}
		}			
	}
	closedir(dp);
}