Bell 32V development

[unix-history] / usr / src / cmd / learn / learn.c

#include "stdio.h"
#include "lrndef"
#include "lrnref"
#include "signal.h"

main(argc,argv)
char *argv[];
{
       extern hangup(), intrpt();
       extern char * getlogin();
       char *malloc();

       speed = 0;
       more = 1;
       pwline = getlogin();
       setbuf(stdout, malloc(BUFSIZ));
       selsub(argc, argv);
       signal(SIGHUP, hangup);
       signal(SIGINT, intrpt);
       while (more) {
               selunit();
               dounit();
               whatnow();
       }
       wrapup(0);
}

hangup()
{
       wrapup(1);
}

intrpt()
{
       char response[20], *p;

       signal(SIGINT, hangup);
       write(2, "\nInterrupt.\nWant to go on?  ", 28);
       p = response;
       *p = 'n';
       while (read(0, p, 1) == 1 && *p != '\n')
               p++;
       if (response[0] != 'y')
               wrapup(1);
       ungetc('\n', stdin);
       signal(SIGINT, intrpt);
}