From f1dd179e122bdfdb7ca3072d9603607740efda05 Mon Sep 17 00:00:00 2001
From: "djm@openbsd.org" <djm@openbsd.org>
Date: Thu, 4 Oct 2018 00:10:11 +0000
Subject: upstream: include a little more information about the status and

disposition of channel's extended (stderr) fd; makes debugging some things a
bit easier. No behaviour change.

OpenBSD-Commit-ID: 483eb6467dc7d5dbca8eb109c453e7a43075f7ce
---
 nchan.c | 52 +++++++++++++++++++++++++++++++---------------------
 1 file changed, 31 insertions(+), 21 deletions(-)

(limited to 'nchan.c')

diff --git a/nchan.c b/nchan.c
index 24929556..da7a9d6d 100644
--- a/nchan.c
+++ b/nchan.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: nchan.c,v 1.67 2017/09/12 06:35:32 djm Exp $ */
+/* $OpenBSD: nchan.c,v 1.68 2018/10/04 00:10:11 djm Exp $ */
 /*
  * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl.  All rights reserved.
  *
@@ -373,17 +373,23 @@ chan_shutdown_write(struct ssh *ssh, Channel *c)
 	if (c->type == SSH_CHANNEL_LARVAL)
 		return;
 	/* shutdown failure is allowed if write failed already */
-	debug2("channel %d: close_write", c->self);
+	debug2("channel %d: %s (i%d o%d sock %d wfd %d efd %d [%s])",
+	    c->self, __func__, c->istate, c->ostate, c->sock, c->wfd, c->efd,
+	    channel_format_extended_usage(c));
 	if (c->sock != -1) {
-		if (shutdown(c->sock, SHUT_WR) < 0)
-			debug2("channel %d: chan_shutdown_write: "
-			    "shutdown() failed for fd %d: %.100s",
-			    c->self, c->sock, strerror(errno));
+		if (shutdown(c->sock, SHUT_WR) < 0) {
+			debug2("channel %d: %s: shutdown() failed for "
+			    "fd %d [i%d o%d]: %.100s", c->self, __func__,
+			    c->sock, c->istate, c->ostate,
+			    strerror(errno));
+		}
 	} else {
-		if (channel_close_fd(ssh, &c->wfd) < 0)
-			logit("channel %d: chan_shutdown_write: "
-			    "close() failed for fd %d: %.100s",
-			    c->self, c->wfd, strerror(errno));
+		if (channel_close_fd(ssh, &c->wfd) < 0) {
+			logit("channel %d: %s: close() failed for "
+			    "fd %d [i%d o%d]: %.100s",
+			    c->self, __func__, c->wfd, c->istate, c->ostate,
+			    strerror(errno));
+		}
 	}
 }
 
@@ -392,23 +398,27 @@ chan_shutdown_read(struct ssh *ssh, Channel *c)
 {
 	if (c->type == SSH_CHANNEL_LARVAL)
 		return;
-	debug2("channel %d: close_read", c->self);
+	debug2("channel %d: %s (i%d o%d sock %d wfd %d efd %d [%s])",
+	    c->self, __func__, c->istate, c->ostate, c->sock, c->rfd, c->efd,
+	    channel_format_extended_usage(c));
 	if (c->sock != -1) {
 		/*
 		 * shutdown(sock, SHUT_READ) may return ENOTCONN if the
 		 * write side has been closed already. (bug on Linux)
 		 * HP-UX may return ENOTCONN also.
 		 */
-		if (shutdown(c->sock, SHUT_RD) < 0
-		    && errno != ENOTCONN)
-			error("channel %d: chan_shutdown_read: "
-			    "shutdown() failed for fd %d [i%d o%d]: %.100s",
-			    c->self, c->sock, c->istate, c->ostate,
-			    strerror(errno));
+		if (shutdown(c->sock, SHUT_RD) < 0 && errno != ENOTCONN) {
+			error("channel %d: %s: shutdown() failed for "
+			    "fd %d [i%d o%d]: %.100s",
+			    c->self, __func__, c->sock, c->istate, c->ostate,
+ 			    strerror(errno));
+		}
 	} else {
-		if (channel_close_fd(ssh, &c->rfd) < 0)
-			logit("channel %d: chan_shutdown_read: "
-			    "close() failed for fd %d: %.100s",
-			    c->self, c->rfd, strerror(errno));
+		if (channel_close_fd(ssh, &c->rfd) < 0) {
+			logit("channel %d: %s: close() failed for "
+			    "fd %d [i%d o%d]: %.100s",
+			    c->self, __func__, c->rfd, c->istate, c->ostate,
+			    strerror(errno));
+		}
 	}
 }
-- 
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