isatty.c.patch   [plain text]

--- isatty.c.orig	Thu Jan 31 16:57:29 2002
+++ isatty.c	Sun May 18 00:50:20 2003
@@ -39,14 +39,19 @@
 
 #include <termios.h>
 #include <unistd.h>
+#include <sys/filio.h>
+#include <sys/conf.h>
 
 int
 isatty(fd)
 	int fd;
 {
-	int retval;
+	int retval, type;
 	struct termios t;
 
-	retval = (tcgetattr(fd, &t) != -1);
+	if(ioctl(fd, FIODTYPE, &type) != -1)
+	    retval = (type == D_TTY);
+	else
+	    retval = (tcgetattr(fd, &t) != -1);
 	return(retval);
 }