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From: Takashi Yano <tyan0@sourceware.org> To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin/cygwin-3_3-branch] Cygwin: fsync: Return EINVAL for special files. Date: Mon, 14 Mar 2022 10:39:54 +0000 (GMT) [thread overview] Message-ID: <20220314103954.B5869385E02F@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=85eb7125a65e7b62881c314b2ce59f8422dcc9ec commit 85eb7125a65e7b62881c314b2ce59f8422dcc9ec Author: Takashi Yano <takashi.yano@nifty.ne.jp> Date: Sat Mar 12 06:19:53 2022 +0900 Cygwin: fsync: Return EINVAL for special files. - Unlike linux, fsync() calls FlushFileBuffers() even for special files. This causes the problem reported in: https://cygwin.com/pipermail/cygwin/2022-March/251022.html This patch fixes the issue. Diff: --- winsup/cygwin/fhandler.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc index 98d7a3b2d..fc7bf0a0e 100644 --- a/winsup/cygwin/fhandler.cc +++ b/winsup/cygwin/fhandler.cc @@ -1750,7 +1750,7 @@ fhandler_base::utimens (const struct timespec *tvp) int fhandler_base::fsync () { - if (!get_handle () || nohandle ()) + if (!get_handle () || nohandle () || pc.isspecial ()) { set_errno (EINVAL); return -1;
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