glibc/sysdeps/unix/bsd/getpt.c
Ulrich Drepper e7c5513dcd Update.
1998-09-21 10:00  Ulrich Drepper  <drepper@cygnus.com>

	* string/bits/string2.h: Add mempcpy optimization.
	* sysdeps/generic/mempcpy.c: Undefined __mempcpy.
	* intl/localealias.c: Define mempcpy only if not already defined.

	* sysdeps/i386/i486/bits/string.h: Define ffsl only if not already
	defined.

1998-09-20 10:48 -0400  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* csu/abi-note.S: Emit the note directly instead of defining
	a preprocessor macro that's only used once.  Don't include sysdep.h.
	* abi-tags: Generalize Solaris entry.

1998-09-18  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/bsd/getpt.c (__libc_ptyname1, __libc_ptyname2):
	Change to array to avoid runtime relocation.
	* sysdeps/unix/sysv/linux/ptsname.c: Update declarations.

1998-09-21 12:22  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* malloc/Makefile ($(objpfx)libmcheck.a): Fix use of $(LN_S).
	* math/Makefile ($(objpfx)libieee.a): Likewise.

1998-09-21  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/getpt.c: Fix order of argument to weak_alias.
	Patch by John Tobey <jtobey@banta-im.com>.
1998-09-21 14:34:13 +00:00

84 lines
2.1 KiB
C

/* Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.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[] = PTYNAME1;
/* Letters indicating the position within a series. */
#ifndef PTYNAME2
#define PTYNAME2 "0123456789abcdefghijklmnopqrstuv";
#endif
const char __libc_ptyname2[] = PTYNAME2;
/* Open a master pseudo terminal and return its file descriptor. */
int
__getpt (void)
{
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, O_RDWR);
if (fd != -1)
{
if (__isatty (fd))
return fd;
__close (fd);
continue;
}
if (errno != EIO)
return -1;
}
}
__set_errno (ENFILE);
return -1;
}
weak_alias (__getpt, getpt)