Update.

* login/pty-private.h: Move to...
	* sysdeps/generic/pty-private.h: ...here.
	* sysdeps/unix/sysv/linux/pty-private.h: New file.  Linux specific
	version.
	* login/programs/pt_chown.c (do_pt_chown): Use unix98_pseudo_p is
	available.

ChangeLog

@@ -1,5 +1,12 @@
 1999-08-24  Ulrich Drepper  <drepper@cygnus.com>
 
+	* login/pty-private.h: Move to...
+	* sysdeps/generic/pty-private.h: ...here.
+	* sysdeps/unix/sysv/linux/pty-private.h: New file.  Linux specific
+	version.
+	* login/programs/pt_chown.c (do_pt_chown): Use unix98_pseudo_p is
+	available.
+
 	* libio/fileops.c (_IO_new_file_xsputn): Use _IO_OVERFLOW instead
 	of __overflow.
 

login/programs/pt_chown.c

@@ -109,7 +109,13 @@ do_pt_chown (void)
 
   /* Check that the returned slave pseudo terminal is a
      character device.  */
-  if (stat (pty, &st) < 0 || !S_ISCHR(st.st_mode))
+  if (stat (pty, &st) < 0
+#ifdef unix98_pseudo_p
+      || ! unix98_pseudo_p (st.st_rdev)
+#else
+      || !S_ISCHR(st.st_mode)
+#endif
+      )
     return FAIL_EINVAL;
 
   /* Get the group ID of the special `tty' group.  */

sysdeps/generic/pty-private.h

@@ -1,5 +1,5 @@
 /* Internal defenitions and declarations for pseudo terminal functions.
-   Copyright (C) 1998 Free Software Foundation, Inc.
+   Copyright (C) 1998, 1999 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
 
@@ -30,6 +30,9 @@
 /* Path to the helper program that implements `grantpt' in user space.  */
 #define _PATH_PT_CHOWN LIBEXECDIR "/pt_chown"
 
+/* Test whether given TTY is really a Unix98 pseudo terminal.  */
+/* #define unix98_pseudo_p(Dev) ... */
+
 /* Exit codes for the helper program.  */
 enum  /* failure modes */
 {

sysdeps/unix/sysv/linux/pty-private.h

@@ -0,0 +1,45 @@
+/* Internal defenitions and declarations for pseudo terminal functions.
+   Copyright (C) 1998, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _PTY_PRIVATE_H
+#define _PTY_PRIVATE_H 1
+
+/* The group slave pseudo terminals belong to.  */
+#define TTY_GROUP "tty"
+
+/* The file descriptor connected to the master pseudo terminal.  */
+#define PTY_FILENO 3
+
+/* Path to the helper program that implements `grantpt' in user space.  */
+#define _PATH_PT_CHOWN LIBEXECDIR "/pt_chown"
+
+/* Test whether given TTY is really a Unix98 pseudo terminal.  */
+#define unix98_pseudo_p(Dev) ((Dev) >= 136 && (Dev) <= 143)
+
+/* Exit codes for the helper program.  */
+enum  /* failure modes */
+{
+  FAIL_EBADF = 1,
+  FAIL_EINVAL,
+  FAIL_EACCES,
+  FAIL_EXEC
+};
+
+#endif /* pty-private.h  */