列出目录下的文件

使用scandir 显示目录下的文件

#include <stdio.h>
#include <stdlib.h> /* free() */
#include <dirent.h>

int main(void) {
 struct dirent **filelist = {0};
 char *directory = ".";
 int fcount = -1;
 int i = 0;

 fcount = scandir(directory, &filelist, 0, alphasort);

 if(fcount < 0) {
  perror(directory);
  return 1;
 }

 for(i = 0; i < fcount; i++)  {
  printf("%02d: %s/n", i, filelist[i]->d_name);
  free(filelist[i]);
 }

 free(filelist);
 return 0;
}

 

使用filter

#include <stdio.h>
#include <stdlib.h> /* free() */
#include <dirent.h>

#include    <fnmatch.h>

int filter(const struct dirent *entry)
{
    if (fnmatch("ywtest*", entry->d_name, FNM_PATHNAME|FNM_PERIOD) == 0)
    {
        printf("file is %s/n", entry->d_name);
        return 1;
    }
    else 
    {
        return 0;
    }
}
int main(void) {
 struct dirent **filelist = {0};
 char *directory = ".";
 int fcount = -1;
 int i = 0;

 fcount = scandir(directory, &filelist, filter, alphasort);
 printf("coutn is %d/n", fcount);

 if(fcount < 0) {
  perror(directory);
  return 1;
 }
 for(i = 0; i < fcount; i++)  {
  printf("%02d: %s/n", i, filelist[i]->d_name);
  free(filelist[i]);
 }

 free(filelist);
 return 0;
}

 

用了filter函数，就可以过滤掉不需要的文件。

 

使用fnmatch显示匹配的文件

 

#include <locale.h>
#include <fnmatch.h>
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>

int main(int argc, char *argv[] )
{
  char    *pattern;
  DIR     *dir;
  struct dirent    *entry;
  int     ret; 

  /*setlocale(LC_ALL, "zh_CN.UTF-8");*/
  if(argc != 3)
  {
      printf("Usage: a.out pattern directory/n");
      return 0;
  }

  dir = opendir(argv[2]);

  pattern = argv[1];
  printf("dir %s,pattern %s/n", argv[2], pattern);

  if(dir != NULL){
    while( (entry = readdir(dir)) != NULL){
      ret = fnmatch(pattern, entry->d_name, FNM_PATHNAME|FNM_PERIOD);
      if(ret == 0){
        printf("%s/n", entry->d_name);
      }else if(ret == FNM_NOMATCH){
        continue ;
      }else{
        printf("error file=%s/n", entry->d_name);
      }    
    }
    closedir(dir);
  }
}