makebuf.c.patch   [plain text]

--- makebuf.c.orig	2006-10-11 20:54:06.000000000 -0700
+++ makebuf.c	2006-10-12 10:09:09.000000000 -0700
@@ -49,6 +49,8 @@
 #include "local.h"
 #include "un-namespace.h"
 
+#define TTYBUFSIZE	4096
+
 /*
  * Allocate a file buffer, or switch to unbuffered I/O.
  * Per the ANSI C standard, ALL tty devices default to line buffered.
@@ -71,6 +73,12 @@
 		return;
 	}
 	flags = __swhatbuf(fp, &size, &couldbetty);
+	if (couldbetty && isatty(fp->_file)) {
+		flags |= __SLBF;
+		/* st_blksize for ttys is 128K, so make it more reasonable */
+		if (size > TTYBUFSIZE)
+			fp->_blksize = size = TTYBUFSIZE;
+	}
 	if ((p = malloc(size)) == NULL) {
 		fp->_flags |= __SNBF;
 		fp->_bf._base = fp->_p = fp->_nbuf;
@@ -81,8 +89,6 @@
 	flags |= __SMBF;
 	fp->_bf._base = fp->_p = p;
 	fp->_bf._size = size;
-	if (couldbetty && isatty(fp->_file))
-		flags |= __SLBF;
 	fp->_flags |= flags;
 }