From 6b3242c12c197664bcd78a5e7694121a43d26a5b Mon Sep 17 00:00:00 2001
From: tedu <>
Date: Mon, 1 Mar 2004 00:37:08 +0000
Subject: resolve pr3694.  add -d [etached] to ignore stdin.  ok henning@
 mcbride@

---
 src/usr.bin/nc/nc.1     |  4 +++-
 src/usr.bin/nc/netcat.c | 12 ++++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/usr.bin/nc/nc.1 b/src/usr.bin/nc/nc.1
index 64a1dbbc8b..82712fad80 100644
--- a/src/usr.bin/nc/nc.1
+++ b/src/usr.bin/nc/nc.1
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: nc.1,v 1.28 2004/02/20 10:53:10 jmc Exp $
+.\"     $OpenBSD: nc.1,v 1.29 2004/03/01 00:37:08 tedu Exp $
 .\"
 .\" Copyright (c) 1996 David Sacerdote
 .\" All rights reserved.
@@ -89,6 +89,8 @@ to use IPv4 addresses only.
 Forces
 .Nm
 to use IPv6 addresses only.
+.It Fl d
+Do not attempt to read from stdin.
 .It Fl h
 Prints out
 .Nm
diff --git a/src/usr.bin/nc/netcat.c b/src/usr.bin/nc/netcat.c
index 505cbd77b1..f303bd2fb1 100644
--- a/src/usr.bin/nc/netcat.c
+++ b/src/usr.bin/nc/netcat.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: netcat.c,v 1.67 2004/02/20 10:53:10 jmc Exp $ */
+/* $OpenBSD: netcat.c,v 1.68 2004/03/01 00:37:08 tedu Exp $ */
 /*
  * Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
  *
@@ -60,6 +60,7 @@
 #define PORT_MAX_LEN	6
 
 /* Command Line Options */
+int	dflag;					/* detached, no stdin */
 int	iflag;					/* Interval Flag */
 int	kflag;					/* More than one connect */
 int	lflag;					/* Bind to local port */
@@ -113,7 +114,7 @@ main(int argc, char *argv[])
 	endp = NULL;
 	sv = NULL;
 
-	while ((ch = getopt(argc, argv, "46UX:hi:klnp:rs:tuvw:x:zS")) != -1) {
+	while ((ch = getopt(argc, argv, "46UX:dhi:klnp:rs:tuvw:x:zS")) != -1) {
 		switch (ch) {
 		case '4':
 			family = AF_INET;
@@ -129,6 +130,9 @@ main(int argc, char *argv[])
 			if ((socksv != 4 && socksv != 5) || *endp != '\0')
 				errx(1, "only SOCKS version 4 and 5 supported");
 			break;
+		case 'd':
+			dflag = 1;
+			break;
 		case 'h':
 			help();
 			break;
@@ -578,7 +582,7 @@ readwrite(int nfd)
 		if (iflag)
 			sleep(iflag);
 
-		if ((n = poll(pfd, 2, timeout)) < 0) {
+		if ((n = poll(pfd, 2 - dflag, timeout)) < 0) {
 			close(nfd);
 			err(1, "Polling Error");
 		}
@@ -603,7 +607,7 @@ readwrite(int nfd)
 			}
 		}
 
-		if (pfd[1].revents & POLLIN) {
+		if (!dflag && pfd[1].revents & POLLIN) {
 			if ((n = read(wfd, buf, sizeof(buf))) < 0)
 				return;
 			else if (n == 0) {
-- 
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