1 /*- 2 * Copyright (c) 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)maktee.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 #include "stdio.h" 13 #include "signal.h" 14 #include "lrnref.h" 15 16 static int oldout; 17 static char tee[50]; 18 19 maktee() 20 { 21 int fpip[2], in, out; 22 23 if (tee[0] == 0) 24 sprintf(tee, "%s/bin/lrntee", direct); 25 pipe(fpip); 26 in = fpip[0]; 27 out= fpip[1]; 28 if (fork() == 0) { 29 signal(SIGINT, SIG_IGN); 30 close(0); 31 close(out); 32 dup(in); 33 close(in); 34 execl (tee, "lrntee", 0); 35 perror(tee); 36 fprintf(stderr, "Maktee: lrntee exec failed\n"); 37 exit(1); 38 } 39 close(in); 40 fflush(stdout); 41 oldout = dup(1); 42 close(1); 43 if (dup(out) != 1) { 44 perror("dup"); 45 fprintf(stderr, "Maktee: error making tee for copyout\n"); 46 } 47 close(out); 48 return(1); 49 } 50 51 untee() 52 { 53 int x; 54 55 fflush(stdout); 56 close(1); 57 dup(oldout); 58 close(oldout); 59 wait(&x); 60 } 61