#include "apue.h"

 #include <fcntl.h>

 #define RWRWRW    (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)

 int main(int argc,char *argv[])

 {

     umask();

     if(creat("zbzhuang",RWRWRW) < )

         err_sys("create error for zbzhuang\r\n");

     umask(S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);

     if(creat("caylin",RWRWRW) < )

         err_sys("create error for caylin\r\n");

     return ;

 }

 ~