[newlib-cygwin] Cygwin: honor the O_PATH flag when opening a FIFO
Ken Brown
kbrown@sourceware.org
Thu Jun 27 12:12:00 GMT 2019
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=aa55d22cb55d67d7f77ee9d58f9016c42c3ee495
commit aa55d22cb55d67d7f77ee9d58f9016c42c3ee495
Author: Ken Brown <kbrown@cornell.edu>
Date: Thu Jun 27 07:46:14 2019 -0400
Cygwin: honor the O_PATH flag when opening a FIFO
Previously fhandler_fifo::open would treat the FIFO as a reader and
would block, waiting for a writer.
Diff:
---
winsup/cygwin/fhandler_fifo.cc | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/winsup/cygwin/fhandler_fifo.cc b/winsup/cygwin/fhandler_fifo.cc
index 737264b..92797ce 100644
--- a/winsup/cygwin/fhandler_fifo.cc
+++ b/winsup/cygwin/fhandler_fifo.cc
@@ -451,11 +451,18 @@ fhandler_fifo::open (int flags, mode_t)
error_set_errno
} res;
+ if (flags & O_PATH)
+ {
+ query_open (query_read_attributes);
+ nohandle (true);
+ }
+
/* Determine what we're doing with this fhandler: reading, writing, both */
switch (flags & O_ACCMODE)
{
case O_RDONLY:
- reader = true;
+ if (!query_open ())
+ reader = true;
break;
case O_WRONLY:
writer = true;
@@ -577,6 +584,8 @@ fhandler_fifo::open (int flags, mode_t)
}
}
}
+ if (query_open ())
+ res = success;
out:
if (res == error_set_errno)
__seterrno ();
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