public inbox for
help / color / mirror / Atom feed
From: Corinna Vinschen <>
Subject: [newlib-cygwin/cygwin-3_3-branch] Cygwin: pipe: Avoid false EOF while reading output of C# programs.
Date: Mon,  8 Nov 2021 09:50:58 +0000 (GMT)	[thread overview]
Message-ID: <> (raw);h=1f7aa67b1c9a2db50b04a0f7e539c780b93ccca1

commit 1f7aa67b1c9a2db50b04a0f7e539c780b93ccca1
Author: Takashi Yano <>
Date:   Sun Nov 7 12:47:18 2021 +0900

    Cygwin: pipe: Avoid false EOF while reading output of C# programs.
    - If output of C# program is redirected to pipe, pipe reader falsely
      detects EOF. This happens after overhaul of pipe implementation.
      This patch fixes the issue.

 winsup/cygwin/ | 3 ++-
 winsup/cygwin/release/3.3.2    | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/ b/winsup/cygwin/
index 63e432160..724944336 100644
--- a/winsup/cygwin/
+++ b/winsup/cygwin/
@@ -393,7 +393,8 @@ fhandler_pipe::raw_read (void *ptr, size_t& len)
-      if (nbytes_now == 0 || status == STATUS_BUFFER_OVERFLOW)
+      if ((nbytes_now == 0 && !NT_SUCCESS (status))
+	  || status == STATUS_BUFFER_OVERFLOW)
   ReleaseMutex (read_mtx);
diff --git a/winsup/cygwin/release/3.3.2 b/winsup/cygwin/release/3.3.2
index 263c3efe6..2e48e39be 100644
--- a/winsup/cygwin/release/3.3.2
+++ b/winsup/cygwin/release/3.3.2
@@ -8,3 +8,7 @@ Bug Fixes
 - Fix a permission problem when writing ACLs on Samba.
+- Fix the issue that pipe reader falsely detects EOF if the output of
+  the C# program is redirected to the pipe.
+  Addresses:

                 reply	other threads:[~2021-11-08  9:50 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).