Programming

/*   #define OLD_TERMIO  */

#ifdef __STDC__
#define PROTOTYPICAL
#endif
#ifdef __cplusplus
#define PROTOTYPICAL
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#ifdef OLD_TERMIO
#include <termio.h>
#else
#include <termios.h>
#endif

#ifdef PROTOTYPICAL
int main(int argc, char *argv[])
#else
main(argc,argv)
char *argv[];
#endif

{
#ifdef OLD_TERMIO
        struct termio orig,now;
#else
        struct termios orig,now;
#endif
        int c, i, rc, done;
        setvbuf(stdout, NULL, _IONBF ,0);

#ifdef OLD_TERMIO
        ioctl(0, TCGETA, (char *) &orig);
#else
        tcgetattr(0, &orig);
#endif
        now=orig;
        now.c_lflag &= ~(ISIG|ICANON|ECHO);
        now.c_cc[VMIN]=1;
        now.c_cc[VTIME]=2;
#ifdef OLD_TERMIO
        ioctl(0,TCSETA, (char *) &now);
#else
        tcsetattr(0, TCSANOW, &now);
#endif
        done=0;
        while(!done) {
                printf("hit a key: ");
                c=getchar();
                printf(" got a  %03X \n", c);
                done = c=='q';
        }
#ifdef OLD_TERMIO
        ioctl(0,TCSETA, (char *) &orig);
#else
        tcsetattr(0, TCSANOW, &orig);
#endif
        exit(0);
}