[newlib-cygwin] Cygwin: ctty: Remove old 'kludge' code.

[Takashi Yano <tyan0@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=93f70d7849b865f2081596bbeabdd6fca6101553

commit 93f70d7849b865f2081596bbeabdd6fca6101553
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Sun Mar 5 18:17:39 2023 +0900

    Cygwin: ctty: Remove old 'kludge' code.
    
    Remove old 'kludge' code which does not seem necessary anymore. The
    comment of the 'kludge' is as follows.
    
      * syscalls.cc (setsid): On second thought, in the spirit of keeping
        things kludgy, set ctty to -2 here as a special flag, and...
        (open): ...only eschew setting O_NOCTTY when that case is detected.
    
    Fixes: c38a2d837303
    Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>

Diff:
---
 winsup/cygwin/dtable.cc   |  7 -------
 winsup/cygwin/syscalls.cc | 11 -----------
 2 files changed, 18 deletions(-)

diff --git a/winsup/cygwin/dtable.cc b/winsup/cygwin/dtable.cc
index 301ec8ca9..18e0f3097 100644
--- a/winsup/cygwin/dtable.cc
+++ b/winsup/cygwin/dtable.cc
@@ -764,13 +764,6 @@ dtable::dup3 (int oldfd, int newfd, int flags)
       return -1;
     }
 
-  /* This is a temporary kludge until all utilities can catch up with
-     a change in behavior that implements linux functionality:  opening
-     a tty should not automatically cause it to become the controlling
-     tty for the process.  */
-  if (newfd > 2)
-    flags |= O_NOCTTY;
-
   if ((newfh = dup_worker (fds[oldfd], flags)) == NULL)
     {
       res = -1;
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 3908aee2e..8ae0397fb 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -1450,17 +1450,6 @@ open (const char *unix_path, int flags, ...)
       int opt = PC_OPEN | PC_SYM_NOFOLLOW_PROCFD;
       opt |= (flags & (O_NOFOLLOW | O_EXCL)) ? PC_SYM_NOFOLLOW
 					     : PC_SYM_FOLLOW;
-      /* This is a temporary kludge until all utilities can catch up
-	 with a change in behavior that implements linux functionality:
-	 opening a tty should not automatically cause it to become the
-	 controlling tty for the process.  */
-      if (!(flags & O_NOCTTY) && fd > 2 && myself->ctty != -2)
-	{
-	  flags |= O_NOCTTY;
-	  /* flag that, if opened, this fhandler could later be capable
-	     of being a controlling terminal if /dev/tty is opened. */
-	  opt |= PC_CTTY;
-	}
 
       /* If we're opening a FIFO, we will call device_access_denied
 	 below.  This leads to a call to fstat, which can use the