From dfa77baba7b449c3bf23b84a4c6a0ed29a86a88a Mon Sep 17 00:00:00 2001
From: david parsons <orc@pie.pell.portland.or.us>
Date: Sat, 4 Feb 2017 23:56:46 -0800
Subject: [PATCH] (the return from notspecial() was reversed)

---
 Makefile.in  |  6 +++++-
 configure.sh |  1 +
 mkd2html.c   | 10 +++++++---
 notspecial.c |  6 +++---
 theme.c      |  6 ++++--
 5 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/Makefile.in b/Makefile.in
index 3d72dfc..4f1b6b0 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -22,7 +22,7 @@ OBJS=mkdio.o markdown.o dumptree.o generate.o \
 TESTFRAMEWORK=echo cols branch
 
 # modules that markdown, makepage, mkd2html, &tc use
-COMMON=pgm_options.o gethopt.o
+COMMON=pgm_options.o gethopt.o notspecial.o
 
 MAN3PAGES=mkd-callbacks.3 mkd-functions.3 markdown.3 mkd-line.3
 
@@ -104,6 +104,9 @@ makepage:  makepage.c $(COMMON) $(MKDLIB) mkdio.h
 pgm_options.o: pgm_options.c mkdio.h config.h
 	$(CC) $(CFLAGS) -I. -c pgm_options.c
 
+notspecial.o: notspecial.c
+	$(CC) $(CFLAGS) -I. -c notspecial.c
+
 gethopt.o: gethopt.c
 	$(CC) $(CFLAGS) -I. -c gethopt.c
 
@@ -159,3 +162,4 @@ setup.o: setup.c config.h cstring.h amalloc.h markdown.h
 github_flavoured.o: github_flavoured.c config.h cstring.h amalloc.h markdown.h
 gethopt.o: gethopt.c gethopt.h
 h1title.o: h1title.c markdown.h
+notspecial.o: notspecial.c config.h
diff --git a/configure.sh b/configure.sh
index ef297c4..ee6606a 100755
--- a/configure.sh
+++ b/configure.sh
@@ -112,6 +112,7 @@ AC_CHECK_BASENAME
 AC_CHECK_ALLOCA
 
 AC_CHECK_HEADERS sys/types.h pwd.h && AC_CHECK_FUNCS getpwuid
+AC_CHECK_HEADERS sys/stat.h && AC_CHECK_FUNCS stat
 
 if AC_CHECK_FUNCS srandom; then
     AC_DEFINE 'INITRNG(x)' 'srandom((unsigned int)x)'
diff --git a/mkd2html.c b/mkd2html.c
index 355a532..89afe17 100644
--- a/mkd2html.c
+++ b/mkd2html.c
@@ -41,6 +41,8 @@
 
 char *pgm = "mkd2html";
 
+extern int notspecial(char *filename);
+
 #ifndef HAVE_BASENAME
 char *
 basename(char *path)
@@ -154,9 +156,11 @@ char **argv;
 	}
 	strcpy(dest, source);
 
-	if (( dot = strrchr(dest, '.') ))
-	    *dot = 0;
-	strcat(dest, ".html");
+	if ( notspecial(dest) ) {
+	    if (( dot = strrchr(dest, '.') ))
+		*dot = 0;
+	    strcat(dest, ".html");
+	}
 
 	if ( (output = fopen(dest, "w")) == 0 )
 	    fail("can't write to %s", dest);
diff --git a/notspecial.c b/notspecial.c
index e865d21..b4cebb3 100644
--- a/notspecial.c
+++ b/notspecial.c
@@ -15,14 +15,14 @@ notspecial(char *file)
     struct stat info;
 
     if ( stat(file, &info) != 0 )
-	return 0;
+	return 1;
     
-    return (info.st_flags & (S_IFIFO|S_IFCHR|S_IFSOCK));
+    return !(info.st_flags & (S_IFIFO|S_IFCHR|S_IFSOCK));
 }
 #else
 int
 notspecial(char *file)
 {
-    return 0;
+    return 1;
 }
 #endif
diff --git a/theme.c b/theme.c
index a9c0306..529e115 100644
--- a/theme.c
+++ b/theme.c
@@ -53,6 +53,7 @@ struct stat *infop = 0;
 extern char* mkd_h1_title(MMIOT*);
 #endif
 
+extern int notspecial(char *filename);
 
 #define INTAG 0x01
 #define INHEAD 0x02
@@ -626,10 +627,11 @@ char **argv;
 	}
     }
     if ( output && strcmp(output, "-") ) {
-	if ( force )
+	if ( force && notspecial(output) )
 	    unlink(output);
-	if ( !freopen(output, "w", stdout) )
+	if ( !freopen(output, "w", stdout) ) {
 	    fail("can't write to %s", output);
+	}
     }
 
     if ( !pagename )