track eof in fd-backed source stream

Track an EOF bit in the fd-backed source stream. Don't call read on an FD that
has already returned EOF. Allows ^D to work.

1 files changed, 8 insertions, 2 deletions

diff --git a/colm/input.c b/colm/input.c
index 787a728d..a5c42806 100644
--- a/colm/input.c
+++ b/colm/input.c
@@ -290,8 +290,14 @@ void initFileFuncs()
 
 int fdGetDataImpl( SourceStream *is, char *dest, int length )
 {
-	long got = read( is->fd, dest, length );
-	return got;
+	if ( is->eof )
+		return 0;
+	else {
+		long got = read( is->fd, dest, length );
+		if ( got == 0 )
+			is->eof = true;
+		return got;
+	}
 }
 
 void initFdFuncs()