1 /* Copyright (C) 1998-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
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.
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
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
24 /* Prefix for master pseudo terminal nodes. */
25 #define _PATH_PTY "/dev/pty"
28 /* Letters indicating a series of pseudo terminals. */
30 #define PTYNAME1 "pqrsPQRS"
32 const char __libc_ptyname1
[] attribute_hidden
= PTYNAME1
;
34 /* Letters indicating the position within a series. */
36 #define PTYNAME2 "0123456789abcdefghijklmnopqrstuv";
38 const char __libc_ptyname2
[] attribute_hidden
= PTYNAME2
;
41 /* Open a master pseudo terminal and return its file descriptor. */
43 __bsd_openpt (int oflag
)
45 char buf
[sizeof (_PATH_PTY
) + 2];
49 s
= __mempcpy (buf
, _PATH_PTY
, sizeof (_PATH_PTY
) - 1);
50 /* s[0] and s[1] will be filled in the loop. */
53 for (p
= __libc_ptyname1
; *p
!= '\0'; ++p
)
57 for (q
= __libc_ptyname2
; *q
!= '\0'; ++q
)
63 fd
= __open (buf
, oflag
);
79 return __bsd_openpt (O_RDWR
);
81 libc_hidden_def (__getpt
)
82 weak_alias (__getpt
, getpt
)
85 __posix_openpt (int oflag
)
87 return __bsd_openpt (oflag
);
89 weak_alias (__posix_openpt
, posix_openpt
)