From: deraadt <deraadt@openbsd.org>
Date: Fri, 17 Nov 1995 12:39:20 +0000 (+0000)
Subject: handle meta characters; good security idea from freebsd
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=996f35a12d480d934ab6ca9bd931b57fbe2cf38e;p=openbsd

handle meta characters; good security idea from freebsd
---

diff --git a/usr.bin/write/write.c b/usr.bin/write/write.c
index 3dc298f8cd1..00d5e169e2e 100644
--- a/usr.bin/write/write.c
+++ b/usr.bin/write/write.c
@@ -304,12 +304,17 @@ wr_fputs(s)
 		c = toascii(*s);
 		if (c == '\n') {
 			PUTC('\r');
-			PUTC('\n');
 		} else if (!isprint(c) && !isspace(c) && c != '\007') {
-			PUTC('^');
-			PUTC(c^0x40);	/* DEL to ?, others to alpha */
-		} else
-			PUTC(c);
+			if (c & 0x80) {
+				PUTC('M');
+				PUTC('-');
+				c &= ~0x80;
+			} else {
+				PUTC('^');
+				c &= ~0x40;
+			}
+		}
+		PUTC(c);
 	}
 	return;