diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/ptsname.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/ptsname.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/sysdeps/unix/sysv/linux/ptsname.c b/sysdeps/unix/sysv/linux/ptsname.c deleted file mode 100644 index 41bb0bbb0e..0000000000 --- a/sysdeps/unix/sysv/linux/ptsname.c +++ /dev/null @@ -1,165 +0,0 @@ -/* Copyright (C) 1998-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#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 <_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 slave 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 They have been replaced by major numbers 2 (masters) - and 3 (slaves).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 associated 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; -} - - -int -__ptsname_internal (int fd, char *buf, size_t buflen, struct stat64 *stp) -{ - int save_errno = errno; - unsigned int ptyno; - - 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) - return errno; - else -#endif - { - char *p; - - if (buflen < strlen (_PATH_TTY) + 3) - { - __set_errno (ERANGE); - return ERANGE; - } - - if (__fxstat64 (_STAT_VER, fd, stp) < 0) - return errno; - - /* Check if FD really is a master pseudo terminal. */ - if (! MASTER_P (stp->st_rdev)) - { - __set_errno (ENOTTY); - return ENOTTY; - } - - ptyno = minor (stp->st_rdev); - - 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, stp) < 0) - return errno; - - /* Check if the name we're about to return really corresponds to a - slave pseudo terminal. */ - if (! S_ISCHR (stp->st_mode) || ! SLAVE_P (stp->st_rdev)) - { - /* This really is a configuration problem. */ - __set_errno (ENOTTY); - return ENOTTY; - } - - __set_errno (save_errno); - return 0; -} - - -/* 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) -{ - struct stat64 st; - return __ptsname_internal (fd, buf, buflen, &st); -} -weak_alias (__ptsname_r, ptsname_r) |