UNIX 7th Ed. - /usr/src/cmd/learn/learn.c

   1: #include "stdio.h"
   2: #include "lrndef"
   3: #include "lrnref"
   4: #include "signal.h"
   5: 
   6: main(argc,argv)
   7: char *argv[];
   8: {
   9:     extern hangup(), intrpt();
  10:     extern char * getlogin();
  11:     char *malloc();
  12: 
  13:     speed = 0;
  14:     more = 1;
  15:     pwline = getlogin();
  16:     setbuf(stdout, malloc(BUFSIZ));
  17:     selsub(argc, argv);
  18:     signal(SIGHUP, hangup);
  19:     signal(SIGINT, intrpt);
  20:     while (more) {
  21:         selunit();
  22:         dounit();
  23:         whatnow();
  24:     }
  25:     wrapup(0);
  26: }
  27: 
  28: hangup()
  29: {
  30:     wrapup(1);
  31: }
  32: 
  33: intrpt()
  34: {
  35:     char response[20], *p;
  36: 
  37:     signal(SIGINT, hangup);
  38:     write(2, "\nInterrupt.\nWant to go on?  ", 28);
  39:     p = response;
  40:     *p = 'n';
  41:     while (read(0, p, 1) == 1 && *p != '\n')
  42:         p++;
  43:     if (response[0] != 'y')
  44:         wrapup(1);
  45:     ungetc('\n', stdin);
  46:     signal(SIGINT, intrpt);
  47: }

Defined functions