terminal.c

来自「linux下基于网络编程的TCP/IP端控制开发源程序」· C语言 代码 · 共 57 行

#include<termios.h>
#include<stdio.h>
#include<sys/signal.h>

struct termios old_save;
void error_quit(char *err_string)
{ 
   fprintf(stderr,"%s\n",err_string);
   exit(1);
}
 
void change_mode(void)
 {
  struct termios new_term;
  if(!isatty(0))
   error_quit("standard input is not a terminal");
  
  if(tcgetattr(0,&new_term)==-1)
   error_quit("get the attributes of the terminal");

   old_save=new_term;
   new_term.c_lflag&=~ISIG;
   if(tcsetattr(0,TCSANOW,&new_term)==-1)
      error_quit("set new terminal attributes");
 }
void restore_mode(void)
 {
   if( tcsetattr(0,TCSANOW,&old_save)==-1)
            error_quit("restore terminalattributes");
 }
void handle_ctrl_c(int signo)
  {
      printf("the process receive SIGINT signle number=%d\n",signo);
      printf("now the process will change its terminal attributes.\n");
      change_mode();
   }
void handle_term_signal(int signo)
  {
      printf("signle number=%d\n",signo);
      printf("the process will restore its terminal attributes and exit\n");
      restore_mode();
     exit(0);
   }

main(int argc,char **argv)
  {
    signal(SIGINT,handle_ctrl_c);
    signal(SIGTERM,handle_term_signal);
    printf("please press the buttons ctrl+c\n");
    for(;;);
  }