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From: Ken Brown <kbrown@sourceware.org> To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin] Cygwin: allow opening a symlink with O_PATH | O_NOFOLLOW Date: Mon, 20 Jan 2020 14:48:00 -0000 [thread overview] Message-ID: <20200120144852.116666.qmail@sourceware.org> (raw) 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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