===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/tag.c,v
retrieving revision 1.11
retrieving revision 1.12
diff -c -r1.11 -r1.12
*** src/usr.bin/mandoc/tag.c	2015/11/20 21:58:32	1.11
--- src/usr.bin/mandoc/tag.c	2016/07/08 20:41:13	1.12
***************
*** 1,4 ****
! /*      $OpenBSD: tag.c,v 1.11 2015/11/20 21:58:32 schwarze Exp $    */
  /*
   * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
   *
--- 1,4 ----
! /*      $OpenBSD: tag.c,v 1.12 2016/07/08 20:41:13 schwarze Exp $    */
  /*
   * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
   *
***************
*** 55,60 ****
--- 55,78 ----
  	tag_files.tfd = -1;
  	tag_files.tcpgid = -1;
  
+ 	/* Clean up when dying from a signal. */
+ 
+ 	memset(&sa, 0, sizeof(sa));
+ 	sigfillset(&sa.sa_mask);
+ 	sa.sa_handler = tag_signal;
+ 	sigaction(SIGHUP, &sa, NULL);
+ 	sigaction(SIGINT, &sa, NULL);
+ 	sigaction(SIGTERM, &sa, NULL);
+ 
+ 	/*
+ 	 * POSIX requires that a process calling tcsetpgrp(3)
+ 	 * from the background gets a SIGTTOU signal.
+ 	 * In that case, do not stop.
+ 	 */
+ 
+ 	sa.sa_handler = SIG_IGN;
+ 	sigaction(SIGTTOU, &sa, NULL);
+ 
  	/* Save the original standard output for use by the pager. */
  
  	if ((tag_files.ofd = dup(STDOUT_FILENO)) == -1)
***************
*** 66,77 ****
  	    sizeof(tag_files.ofn));
  	(void)strlcpy(tag_files.tfn, "/tmp/man.XXXXXXXXXX",
  	    sizeof(tag_files.tfn));
- 	memset(&sa, 0, sizeof(sa));
- 	sigfillset(&sa.sa_mask);
- 	sa.sa_handler = tag_signal;
- 	sigaction(SIGHUP, &sa, NULL);
- 	sigaction(SIGINT, &sa, NULL);
- 	sigaction(SIGTERM, &sa, NULL);
  	if ((ofd = mkstemp(tag_files.ofn)) == -1)
  		goto fail;
  	if ((tag_files.tfd = mkstemp(tag_files.tfn)) == -1)
--- 84,89 ----