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* [newlib-cygwin] Cygwin: allow opening a symlink with O_PATH | O_NOFOLLOW
@ 2020-01-20 14:48 Ken Brown
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From: Ken Brown @ 2020-01-20 14:48 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=35a1a6dbdf03df1e33bae51f679820a3a868d0c0
commit 35a1a6dbdf03df1e33bae51f679820a3a868d0c0
Author: Ken Brown <kbrown@cornell.edu>
Date: Fri Dec 27 11:43:58 2019 -0500
Cygwin: allow opening a symlink with O_PATH | O_NOFOLLOW
Up to now, opening a symlink with O_NOFOLLOW fails with ELOOP.
Following Linux, allow this to succeed if O_PATH is also specified.
Diff:
---
winsup/cygwin/syscalls.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 20126ce..038a316 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -1470,7 +1470,7 @@ open (const char *unix_path, int flags, ...)
if (!(fh = build_fh_name (unix_path, opt, stat_suffixes)))
__leave; /* errno already set */
- if ((flags & O_NOFOLLOW) && fh->issymlink ())
+ if ((flags & O_NOFOLLOW) && fh->issymlink () && !(flags & O_PATH))
{
set_errno (ELOOP);
__leave;
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