glibc/sysdeps/unix/bsd/getpt.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

90 lines
2.1 KiB
C

/* Copyright (C) 1998-2022 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)