===================================================================
RCS file: /cvs/mandoc/main.c,v
retrieving revision 1.298
retrieving revision 1.302
diff -u -p -r1.298 -r1.302
--- mandoc/main.c	2017/07/02 21:18:29	1.298
+++ mandoc/main.c	2017/08/21 15:42:58	1.302
@@ -1,4 +1,4 @@
-/*	$Id: main.c,v 1.298 2017/07/02 21:18:29 schwarze Exp $ */
+/*	$Id: main.c,v 1.302 2017/08/21 15:42:58 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2012, 2014-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -111,6 +111,7 @@ static	const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2
 static	char		  help_arg[] = "help";
 static	char		 *help_argv[] = {help_arg, NULL};
 static	enum mandoclevel  rc;
+static	FILE		 *mmsg_stream;
 
 
 int
@@ -190,6 +191,7 @@ main(int argc, char *argv[])
 	curp.mmin = MANDOCERR_MAX;
 	curp.outopts = &conf.output;
 	options = MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1;
+	mmsg_stream = stderr;
 
 	use_pager = 1;
 	tag_files = NULL;
@@ -476,12 +478,23 @@ main(int argc, char *argv[])
 				parse(&curp, fd, *argv);
 			else if (resp->form == FORM_SRC) {
 				/* For .so only; ignore failure. */
-				chdir(conf.manpath.paths[resp->ipath]);
+				(void)chdir(conf.manpath.paths[resp->ipath]);
 				parse(&curp, fd, resp->file);
 			} else
 				passthrough(resp->file, fd,
 				    conf.output.synopsisonly);
 
+			if (ferror(stdout)) {
+				if (tag_files != NULL) {
+					warn("%s", tag_files->ofn);
+					tag_unlink();
+					tag_files = NULL;
+				} else
+					warn("stdout");
+				rc = MANDOCLEVEL_SYSERR;
+				break;
+			}
+
 			if (argc > 1 && curp.outtype <= OUTT_UTF8) {
 				if (curp.outdata == NULL)
 					outdata_alloc(&curp);
@@ -994,6 +1007,7 @@ toptions(struct curparse *curp, char *arg)
 	else if (0 == strcmp(arg, "lint")) {
 		curp->outtype = OUTT_LINT;
 		curp->mmin = MANDOCERR_BASE;
+		mmsg_stream = stdout;
 	} else if (0 == strcmp(arg, "tree"))
 		curp->outtype = OUTT_TREE;
 	else if (0 == strcmp(arg, "man"))
@@ -1083,22 +1097,21 @@ mmsg(enum mandocerr t, enum mandoclevel lvl,
 {
 	const char	*mparse_msg;
 
-	fprintf(stderr, "%s: %s:", getprogname(),
+	fprintf(mmsg_stream, "%s: %s:", getprogname(),
 	    file == NULL ? "<stdin>" : file);
 
 	if (line)
-		fprintf(stderr, "%d:%d:", line, col + 1);
+		fprintf(mmsg_stream, "%d:%d:", line, col + 1);
 
-	fprintf(stderr, " %s",
-	    t < MANDOCERR_STYLE ? "BASE" : mparse_strlevel(lvl));
+	fprintf(mmsg_stream, " %s", mparse_strlevel(lvl));
 
 	if ((mparse_msg = mparse_strerror(t)) != NULL)
-		fprintf(stderr, ": %s", mparse_msg);
+		fprintf(mmsg_stream, ": %s", mparse_msg);
 
 	if (msg)
-		fprintf(stderr, ": %s", msg);
+		fprintf(mmsg_stream, ": %s", msg);
 
-	fputc('\n', stderr);
+	fputc('\n', mmsg_stream);
 }
 
 static pid_t