1/* Copyright (C) 1998-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <sys/types.h>
20#include <termios.h>
21#include <unistd.h>
22#include <utmp.h>
23#include <pty.h>
24
25int
26forkpty (int *amaster, char *name, const struct termios *termp,
27 const struct winsize *winp)
28{
29 int master, slave, pid;
30
31 if (openpty (&master, &slave, name, termp, winp) == -1)
32 return -1;
33
34 switch (pid = fork ())
35 {
36 case -1:
37 close (master);
38 close (slave);
39 return -1;
40 case 0:
41 /* Child. */
42 close (master);
43 if (login_tty (slave))
44 _exit (1);
45
46 return 0;
47 default:
48 /* Parent. */
49 *amaster = master;
50 close (slave);
51
52 return pid;
53 }
54}
55