mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* Copyright (C) 1998-2024 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 <errno.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
/* Prefix for master pseudo terminal nodes. */
|
|
#define _PATH_PTY "/dev/pty"
|
|
|
|
|
|
/* Letters indicating a series of pseudo terminals. */
|
|
#ifndef PTYNAME1
|
|
#define PTYNAME1 "pqrsPQRS"
|
|
#endif
|
|
const char __libc_ptyname1[] attribute_hidden = PTYNAME1;
|
|
|
|
/* Letters indicating the position within a series. */
|
|
#ifndef PTYNAME2
|
|
#define PTYNAME2 "0123456789abcdefghijklmnopqrstuv";
|
|
#endif
|
|
const char __libc_ptyname2[] attribute_hidden = PTYNAME2;
|
|
|
|
|
|
/* Open a master pseudo terminal and return its file descriptor. */
|
|
int
|
|
__bsd_openpt (int oflag)
|
|
{
|
|
char buf[sizeof (_PATH_PTY) + 2];
|
|
const char *p, *q;
|
|
char *s;
|
|
|
|
s = __mempcpy (buf, _PATH_PTY, sizeof (_PATH_PTY) - 1);
|
|
/* s[0] and s[1] will be filled in the loop. */
|
|
s[2] = '\0';
|
|
|
|
for (p = __libc_ptyname1; *p != '\0'; ++p)
|
|
{
|
|
s[0] = *p;
|
|
|
|
for (q = __libc_ptyname2; *q != '\0'; ++q)
|
|
{
|
|
int fd;
|
|
|
|
s[1] = *q;
|
|
|
|
fd = __open (buf, oflag);
|
|
if (fd != -1)
|
|
return fd;
|
|
|
|
if (errno == ENOENT)
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
__set_errno (ENOENT);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
__getpt (void)
|
|
{
|
|
return __bsd_openpt (O_RDWR);
|
|
}
|
|
libc_hidden_def (__getpt)
|
|
weak_alias (__getpt, getpt)
|
|
|
|
int
|
|
__posix_openpt (int oflag)
|
|
{
|
|
return __bsd_openpt (oflag);
|
|
}
|
|
weak_alias (__posix_openpt, posix_openpt)
|