1 /* Copyright (C) 1998 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 <http://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
25 int
forkpty(int * amaster,char * name,const struct termios * termp,const struct winsize * winp)26 forkpty (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 return -1;
38 case 0:
39 /* Child. */
40 close (master);
41 if (login_tty (slave))
42 _exit (1);
43
44 return 0;
45 default:
46 /* Parent. */
47 *amaster = master;
48 close (slave);
49
50 return pid;
51 }
52 }
53