改变文件大小 chsize

[c]代码库

#include <string.h> 
#include <fcntl.h> 
#include <io.h> 

int main(void) 
{ 
   int handle; 
   char buf[11] = "0123456789"; 

   /* create text file containing 10 bytes */ 
   handle = open("DUMMY.FIL", O_CREAT); 
   write(handle, buf, strlen(buf)); 

   /* truncate the file to 5 bytes in size */ 
   chsize(handle, 5); 

   /* close the file */ 
   close(handle); 
   return 0; 
}