hostname buffer will not overflow if it is size MAXHOSTNAMELEN.

1 files changed, 10 insertions, 7 deletions

diff --git a/lib/libc/net/ethers.3 b/lib/libc/net/ethers.3
index 55e34ce4f05..12cc230a8a9 100644
--- a/lib/libc/net/ethers.3
+++ b/lib/libc/net/ethers.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ethers.3,v 1.6 1998/02/27 12:13:27 deraadt Exp $
+.\"	$OpenBSD: ethers.3,v 1.7 1998/03/17 06:18:48 millert Exp $
 .\"
 .\" Written by roland@frob.com.  Public domain.
 .\"
@@ -56,7 +56,10 @@ addresses,
 The
 .Fn ether_ntohost
 function looks up the given Ethernet address and writes the associated
-host name into the character buffer passed.
+host name into the character buffer passed.  This buffer should be
+.Ev
+MAXHOSTNAMELEN
+characters in size.
 The
 .Fn ether_hostton
 function looks up the given host name and writes the associated
@@ -81,6 +84,10 @@ function parses a line from the
 file and fills in the passed ``struct ether_addr'' and character
 buffer with the Ethernet address and host name on the line.  It
 returns zero if the line was successfully parsed and -1 if not.
+The character buffer buffer should be
+.Ev
+MAXHOSTNAMELEN
+characters in size.
 .Sh FILES
 .Bl -tag -width /etc/ethers -compact
 .It Pa /etc/ethers
@@ -100,8 +107,4 @@ NetBSD 0.9b.
 .Sh BUGS
 The data space used by these functions is static; if future use
 requires the data, it should be copied before any subsequent calls to
-these functions overwrite it.  There is no way to restrict how many
-character will be written into the host name buffer passed.  A very
-long line in
-.Pa /etc/ethers
-could overflow your buffer.
+these functions overwrite it.