From 8b63dc9e59c676991ce62316d203849bc56e2a6c Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 14 Apr 2010 23:34:06 +0200
Subject: [PATCH] channel_write: if data has been sent, don't return EAGAIN

When sending data in a loop, we must not return EAGAIN if we
managed to send data in an earlier round. This was reported in
bug #126 => http://libssh2.stuge.se/ticket/126
---
 src/channel.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/channel.c b/src/channel.c
index 2866402..7cabf27 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -2038,6 +2038,11 @@ _libssh2_channel_write(LIBSSH2_CHANNEL *channel, int stream_id,
                                           channel->write_s -
                                           channel->write_packet);
             if (rc == PACKET_EAGAIN) {
+                if(wrote)
+                    /* some pieces of data was sent before the EAGAIN so
+                       we return that amount! */
+                    goto _channel_write_done;
+
                 return libssh2_error(session, rc,
                                      "Unable to send channel data");
             }
@@ -2061,6 +2066,8 @@ _libssh2_channel_write(LIBSSH2_CHANNEL *channel, int stream_id,
         }
     }
 
+  _channel_write_done:
+
     LIBSSH2_FREE(session, channel->write_packet);
     channel->write_packet = NULL;