4.3BSD - /usr/src/usr.bin/learn/maktee.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)maktee.c	4.2	(Berkeley)	4/25/83";
   3: #endif not lint
   4: 
   5: #include "stdio.h"
   6: #include "signal.h"
   7: #include "lrnref.h"
   8: 
   9: static int oldout;
  10: static char tee[50];
  11: 
  12: maktee()
  13: {
  14:     int fpip[2], in, out;
  15: 
  16:     if (tee[0] == 0)
  17:         sprintf(tee, "%s/bin/lrntee", direct);
  18:     pipe(fpip);
  19:     in = fpip[0];
  20:     out= fpip[1];
  21:     if (fork() == 0) {
  22:         signal(SIGINT, SIG_IGN);
  23:         close(0);
  24:         close(out);
  25:         dup(in);
  26:         close(in);
  27:         execl (tee, "lrntee", 0);
  28:         perror(tee);
  29:         fprintf(stderr, "Maktee:  lrntee exec failed\n");
  30:         exit(1);
  31:     }
  32:     close(in);
  33:     fflush(stdout);
  34:     oldout = dup(1);
  35:     close(1);
  36:     if (dup(out) != 1) {
  37:         perror("dup");
  38:         fprintf(stderr, "Maktee:  error making tee for copyout\n");
  39:     }
  40:     close(out);
  41:     return(1);
  42: }
  43: 
  44: untee()
  45: {
  46:     int x;
  47: 
  48:     fflush(stdout);
  49:     close(1);
  50:     dup(oldout);
  51:     close(oldout);
  52:     wait(&x);
  53: }

Defined functions

Defined variables