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* [newlib-cygwin] Cygwin: device_access_denied: return false if O_PATH is set
@ 2020-01-24 10:26 Corinna Vinschen
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From: Corinna Vinschen @ 2020-01-24 10:26 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=d880e97ec95ac3b15be972a99da2a5e97ef63ee6
commit d880e97ec95ac3b15be972a99da2a5e97ef63ee6
Author: Ken Brown <kbrown@cornell.edu>
Date: Thu Jan 23 16:31:04 2020 +0000
Cygwin: device_access_denied: return false if O_PATH is set
If O_PATH is set in the flags argument of
fhandler_base::device_access_denied, return false. No
read/write/execute access should be required in this case.
Previously, the call to device_access_denied in open(2) would lead to
an attempt to open the file with read access even if the O_PATH flag
was set.
Diff:
---
winsup/cygwin/fhandler.cc | 3 +++
1 file changed, 3 insertions(+)
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index b0c9c50..aeee8fe 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -335,6 +335,9 @@ fhandler_base::device_access_denied (int flags)
{
int mode = 0;
+ if (flags & O_PATH)
+ return false;
+
if (flags & O_RDWR)
mode |= R_OK | W_OK;
if (flags & (O_WRONLY | O_APPEND))
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