5 files changed, 29 insertions, 10 deletions

diff --git a/bk_html.c b/bk_html.c
index fad891c..90800f1 100644
--- a/bk_html.c
+++ b/bk_html.c
@@ -884,7 +884,10 @@ void html_backend(paragraph *sourceform, keywordlist *keywords,
 #define listname(lt) ( (lt)==UL ? "ul" : (lt)==OL ? "ol" : "dl" )
 #define itemname(lt) ( (lt)==LI ? "li" : (lt)==DT ? "dt" : "dd" )
 
-	    ho.fp = fopen(f->filename, "w");
+	    if (!strcmp(f->filename, "-"))
+		ho.fp = stdout;
+	    else
+		ho.fp = fopen(f->filename, "w");
 	    if (!ho.fp)
 		error(err_cantopenw, f->filename);
 
@@ -2507,7 +2510,7 @@ static void html_text_limit_internal(htmloutput *ho, wchar_t const *text,
 static void cleanup(htmloutput *ho)
 {
     return_to_neutral(ho);
-    if (ho->fp)
+    if (ho->fp && ho->fp != stdout)
 	fclose(ho->fp);
 }
 
diff --git a/bk_man.c b/bk_man.c
index dce77d4..bb4e5b5 100644
--- a/bk_man.c
+++ b/bk_man.c
@@ -235,7 +235,10 @@ void man_backend(paragraph *sourceform, keywordlist *keywords,
     /*
      * Open the output file.
      */
-    fp = fopen(conf.filename, "w");
+    if (!strcmp(conf.filename, "-"))
+	fp = stdout;
+    else
+	fp = fopen(conf.filename, "w");
     if (!fp) {
 	error(err_cantopenw, conf.filename);
 	return;
@@ -425,7 +428,8 @@ void man_backend(paragraph *sourceform, keywordlist *keywords,
     /*
      * Tidy up.
      */
-    fclose(fp);
+    if (fp != stdout)
+	fclose(fp);
     man_conf_cleanup(conf);
 }
 
diff --git a/bk_pdf.c b/bk_pdf.c
index 6f6349e..525e7d9 100644
--- a/bk_pdf.c
+++ b/bk_pdf.c
@@ -665,7 +665,10 @@ void pdf_backend(paragraph *sourceform, keywordlist *keywords,
      * Write out the PDF file.
      */
 
-    fp = fopen(filename, "wb");
+    if (!strcmp(filename, "-"))
+	fp = stdout;
+    else
+	fp = fopen(filename, "wb");
     if (!fp) {
 	error(err_cantopenw, filename);
 	return;
@@ -712,7 +715,8 @@ void pdf_backend(paragraph *sourceform, keywordlist *keywords,
 	    olist.tail->number + 1, cat->number, info->number);
     fprintf(fp, "startxref\n%d\n%%%%EOF\n", fileoff);
 
-    fclose(fp);
+    if (fp != stdout)
+	fclose(fp);
 
     sfree(filename);
 }
diff --git a/bk_ps.c b/bk_ps.c
index 452d562..95c0451 100644
--- a/bk_ps.c
+++ b/bk_ps.c
@@ -48,7 +48,10 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 	}
     }
 
-    fp = fopen(filename, "w");
+    if (!strcmp(filename, "-"))
+	fp = stdout;
+    else
+	fp = fopen(filename, "w");
     if (!fp) {
 	error(err_cantopenw, filename);
 	return;
@@ -304,7 +307,8 @@ void ps_backend(paragraph *sourceform, keywordlist *keywords,
 
     fprintf(fp, "%%%%EOF\n");
 
-    fclose(fp);
+    if (fp != stdout)
+	fclose(fp);
 
     sfree(filename);
 }
diff --git a/bk_text.c b/bk_text.c
index c8ded79..4f8cdd7 100644
--- a/bk_text.c
+++ b/bk_text.c
@@ -323,7 +323,10 @@ void text_backend(paragraph *sourceform, keywordlist *keywords,
     /*
      * Open the output file.
      */
-    tf.fp = fopen(conf.filename, "w");
+    if (!strcmp(conf.filename, "-"))
+	tf.fp = stdout;
+    else
+	tf.fp = fopen(conf.filename, "w");
     if (!tf.fp) {
 	error(err_cantopenw, conf.filename);
 	return;
@@ -460,7 +463,8 @@ void text_backend(paragraph *sourceform, keywordlist *keywords,
      * Tidy up
      */
     text_output(&tf, NULL);	       /* end charset conversion */
-    fclose(tf.fp);
+    if (tf.fp != stdout)
+	fclose(tf.fp);
     sfree(conf.asect);
     sfree(conf.filename);
 }