[thirdparty/glibc.git] / login / unlockpt.c

/* Copyright (C) 1998-2023 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <stdlib.h>
#include <errno.h>

/* Given a fd on a master pseudoterminal, clear a kernel lock so that
   the slave can be opened.  This is to avoid a race between opening the
   master and calling grantpt() to take possession of the slave. */
int
unlockpt (int fd __attribute__ ((unused)))
{
  __set_errno (ENOSYS);
  return -1;
}

stub_warning (unlockpt)
Commit	Line	Data
6d7e8eda	1	/* Copyright (C) 1998-2023 Free Software Foundation, Inc.
ae1025be	2	This file is part of the GNU C Library.
46d7de19	3
ae1025be	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
46d7de19	8
ae1025be UD	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
46d7de19	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6	15	License along with the GNU C Library; if not, see
5a82c748	16	<https://www.gnu.org/licenses/>. */
46d7de19	17
6591c335 UD	18	#include <stdlib.h>
6591c335 UD	19	#include <errno.h>
46d7de19	20
6591c335 UD	21	/* Given a fd on a master pseudoterminal, clear a kernel lock so that
	22	the slave can be opened. This is to avoid a race between opening the
	23	master and calling grantpt() to take possession of the slave. */
	24	int
80d9be81	25	unlockpt (int fd __attribute__ ((unused)))
6591c335 UD	26	{
	27	__set_errno (ENOSYS);
	28	return -1;
	29	}
46d7de19	30
6591c335	31	stub_warning (unlockpt)