glibc/sysdeps/unix/sysv/linux/ptsname.c
Ulrich Drepper ab26a24a17 Update.
* ctype/ctype-info.c: Declare _nl_C_LC_CTYPE_class,
	_nl_C_LC_CTYPE_class32, _nl_C_LC_CTYPE_toupper, _nl_C_LC_CTYPE_tolower,
	_nl_C_LC_CTYPE_class_upper, _nl_C_LC_CTYPE_class_lower,
	_nl_C_LC_CTYPE_class_alpha, _nl_C_LC_CTYPE_class_digit,
	_nl_C_LC_CTYPE_class_xdigit, _nl_C_LC_CTYPE_class_space,
	_nl_C_LC_CTYPE_class_print, _nl_C_LC_CTYPE_class_graph,
	_nl_C_LC_CTYPE_class_blank, _nl_C_LC_CTYPE_class_cntrl,
	_nl_C_LC_CTYPE_class_punct, _nl_C_LC_CTYPE_class_alnum,
	_nl_C_LC_CTYPE_map_toupper, _nl_C_LC_CTYPE_map_tolower, and
	_nl_C_LC_CTYPE_width: Declare as hidden.
	* include/locale.h: Declare _nl_locale_file_list.
	* locale/C-address.c: Define _nl_C_LC_ADDRESS as hidden.
	* locale/C-collate.c: Define _nl_C_LC_COLLATE as hidden.
	* locale/C-identification.c: Define _nl_C_LC_IDENTIFICATION as hidden.
	* locale/C-measurement.c: Define _nl_C_LC_MEASUREMENT as hidden.
	* locale/C-messages.c: Define _nl_C_LC_MESSAGES as hidden.
	* locale/C-monetary.c: Define _nl_C_LC_MONETARY as hidden.
	* locale/C-name.c: Define _nl_C_LC_NAME as hidden.
	* locale/C-numeric.c: Define _nl_C_LC_NUMERIC as hidden.
	* locale/C-paper.c: Define _nl_C_LC_PAPER as hidden.
	* locale/C-telephone.c: Define _nl_C_LC_TELEPHONE as hidden.
	* locale/C-time.c: Define _nl_C_LC_TIME as hidden.
	* locale/C-ctype.c: Define _nl_C_LC_CTYPE_class,
	_nl_C_LC_CTYPE_class32, _nl_C_LC_CTYPE_toupper, _nl_C_LC_CTYPE_tolower,
	_nl_C_LC_CTYPE_class_upper, _nl_C_LC_CTYPE_class_lower,
	_nl_C_LC_CTYPE_class_alpha, _nl_C_LC_CTYPE_class_digit,
	_nl_C_LC_CTYPE_class_xdigit, _nl_C_LC_CTYPE_class_space,
	_nl_C_LC_CTYPE_class_print, _nl_C_LC_CTYPE_class_graph,
	_nl_C_LC_CTYPE_class_blank, _nl_C_LC_CTYPE_class_cntrl,
	_nl_C_LC_CTYPE_class_punct, _nl_C_LC_CTYPE_class_alnum,
	_nl_C_LC_CTYPE_map_toupper, _nl_C_LC_CTYPE_map_tolower,
	_nl_C_LC_CTYPE_width, and as hidden.
	* locale/findlocale.c: Declare _nl_C as hidden.
	* locale/newlocale.c: Likewise.
	* locale/setlocale.c: Define _nl_C as hidden.  Remove declaration of
	_nl_locale_file_list.
	* locale/xlocale.c: Declare _nl_C_LC_CTYPE_class,
	_nl_C_LC_CTYPE_toupper, and _nl_C_LC_CTYPE_tolower as hidden.
	Define _nl_C_locobj as hidden.

	* malloc/mtrace.c (_mtrace_file): Define as hidden.
	(_mtrace_line): Likewise.

	* include/time.h: Declare __mon_yday as hidden.
	* time/strptime.c [_LIBC] (__mon_yday): Remove declaration.

	* libio/libioP.h: Declare __libio_codecvt as hidden.
	* libio/fileops.c: Declare __libio_translit as hidden.
	* libio/iofwide.c: Define __libio_translit as hidden.

	* login/getutent_r.c: Define __libc_utmp_lock as hidden.
	* login/getutid_r.c: Declare __libc_utmp_lock as hidden.
	* login/getutline_r.c: Likewise.
	* login/utmpname.c: Likewise.

	* login/utmp-private.h: Declare __libc_utmp_file_functions,
	__libc_utmp_unknown_functions, __libc_utmp_jump_table, and
	__libc_utmp_file_name as hidden.

	* locale/setlocale.c (__libc_setlocale_lock): Define as hidden.
	* locale/duplocale.c (__libc_setlocale_lock): Declare as hidden.
	* locale/freelocale.c: Likewise.
	* locale/lc-time.c: Likewise.

	* sysdeps/unix/bsd/getpt.c (__libc_ptyname1): Define as hidden.
	(__libc_ptyname2): Likewise.
	* sysdeps/unix/sysv/linux/ptsname.c (__libc_ptyname1): Declare as
	hidden.
	(__libc_ptyname2): Likewise.

	* sysdeps/generic/sbrk.c: Declare __libc_multiple_libcs as hidden.
	* sysdeps/arm/init-first.c (__libc_multiple_libcs): Define as hidden.
	* sysdeps/generic/init-first.c: Likewise.
	* sysdeps/i386/init-first.c: Likewise.
	* sysdeps/mach/hurd/i386/init-first.c: Likewise.
	* sysdeps/mach/hurd/mips/init-first.c: Likewise.
	* sysdeps/mach/hurd/powerpc/init-first.c: Likewise.
	* sysdeps/sh/init-first.c: Likewise.
	* sysdeps/unix/sysv/aix/init-first.c: Likewise.
	* sysdeps/unix/sysv/linux/init-first.c: Likewise.
2002-03-13 06:33:52 +00:00

168 lines
4.9 KiB
C

/* Copyright (C) 1998, 2000, 2001, 2002 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 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <paths.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <termios.h>
#include <unistd.h>
#include <stdio-common/_itoa.h>
/* Check if DEV corresponds to a master pseudo terminal device. */
#define MASTER_P(Dev) \
(major ((Dev)) == 2 \
|| (major ((Dev)) == 4 && minor ((Dev)) >= 128 && minor ((Dev)) < 192) \
|| (major ((Dev)) >= 128 && major ((Dev)) < 136))
/* Check if DEV corresponds to a master pseudo terminal device. */
#define SLAVE_P(Dev) \
(major ((Dev)) == 3 \
|| (major ((Dev)) == 4 && minor ((Dev)) >= 192 && minor ((Dev)) < 256) \
|| (major ((Dev)) >= 136 && major ((Dev)) < 144))
/* Note that major number 4 corresponds to the old BSD style pseudo
terminal devices. As of Linux 2.1.115 these are no longer
supported. They have been replaced by major numbers 2 (masters)
and 3 (slaves). */
/* Directory where we can find the slave pty nodes. */
#define _PATH_DEVPTS "/dev/pts/"
/* The are declared in getpt.c. */
extern const char __libc_ptyname1[] attribute_hidden;
extern const char __libc_ptyname2[] attribute_hidden;
/* Static buffer for `ptsname'. */
static char buffer[sizeof (_PATH_DEVPTS) + 20];
/* Return the pathname of the pseudo terminal slave assoicated with
the master FD is open on, or NULL on errors.
The returned storage is good until the next call to this function. */
char *
ptsname (int fd)
{
return __ptsname_r (fd, buffer, sizeof (buffer)) != 0 ? NULL : buffer;
}
/* Store at most BUFLEN characters of the pathname of the slave pseudo
terminal associated with the master FD is open on in BUF.
Return 0 on success, otherwise an error number. */
int
__ptsname_r (int fd, char *buf, size_t buflen)
{
int save_errno = errno;
struct stat64 st;
int ptyno;
if (buf == NULL)
{
__set_errno (EINVAL);
return EINVAL;
}
if (!__isatty (fd))
{
__set_errno (ENOTTY);
return ENOTTY;
}
#ifdef TIOCGPTN
if (__ioctl (fd, TIOCGPTN, &ptyno) == 0)
{
/* Buffer we use to print the number in. For a maximum size for
`int' of 8 bytes we never need more than 20 digits. */
char numbuf[21];
const char *devpts = _PATH_DEVPTS;
const size_t devptslen = strlen (_PATH_DEVPTS);
char *p;
numbuf[sizeof (numbuf) - 1] = '\0';
p = _itoa_word (ptyno, &numbuf[sizeof (numbuf) - 1], 10, 0);
if (buflen < devptslen + &numbuf[sizeof (numbuf)] - p)
{
__set_errno (ERANGE);
return ERANGE;
}
memcpy (__stpcpy (buf, devpts), p, &numbuf[sizeof (numbuf)] - p);
}
else if (errno == EINVAL)
#endif
{
char *p;
if (buflen < strlen (_PATH_TTY) + 3)
{
__set_errno (ERANGE);
return ERANGE;
}
if (__fxstat64 (_STAT_VER, fd, &st) < 0)
return errno;
/* Check if FD really is a master pseudo terminal. */
if (! MASTER_P (st.st_rdev))
{
__set_errno (ENOTTY);
return ENOTTY;
}
ptyno = minor (st.st_rdev);
/* This is for the old BSD pseudo terminals. As of Linux
2.1.115 these are no longer supported. */
if (major (st.st_rdev) == 4)
ptyno -= 128;
if (ptyno / 16 >= strlen (__libc_ptyname1))
{
__set_errno (ENOTTY);
return ENOTTY;
}
p = __stpcpy (buf, _PATH_TTY);
p[0] = __libc_ptyname1[ptyno / 16];
p[1] = __libc_ptyname2[ptyno % 16];
p[2] = '\0';
}
if (__xstat64 (_STAT_VER, buf, &st) < 0)
return errno;
/* Check if the name we're about to return really corresponds to a
slave pseudo terminal. */
if (! S_ISCHR (st.st_mode) || ! SLAVE_P (st.st_rdev))
{
/* This really is a configuration problem. */
__set_errno (ENOTTY);
return ENOTTY;
}
__set_errno (save_errno);
return 0;
}
weak_alias (__ptsname_r, ptsname_r)