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glibc/sysdeps/unix/sysv/linux/tcgetattr.c
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/* Copyright (C) 1992-2016 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 | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <string.h> | |
#include <termios.h> | |
#include <unistd.h> | |
#include <sys/ioctl.h> | |
#include <sys/types.h> | |
#include <sysdep.h> | |
/* The difference here is that the termios structure used in the | |
kernel is not the same as we use in the libc. Therefore we must | |
translate it here. */ | |
#include <kernel_termios.h> | |
/* Put the state of FD into *TERMIOS_P. */ | |
int | |
__tcgetattr (int fd, struct termios *termios_p) | |
{ | |
struct __kernel_termios k_termios; | |
int retval; | |
retval = INLINE_SYSCALL (ioctl, 3, fd, TCGETS, &k_termios); | |
if (__glibc_likely (retval == 0)) | |
{ | |
termios_p->c_iflag = k_termios.c_iflag; | |
termios_p->c_oflag = k_termios.c_oflag; | |
termios_p->c_cflag = k_termios.c_cflag; | |
termios_p->c_lflag = k_termios.c_lflag; | |
termios_p->c_line = k_termios.c_line; | |
#ifdef _HAVE_STRUCT_TERMIOS_C_ISPEED | |
# ifdef _HAVE_C_ISPEED | |
termios_p->c_ispeed = k_termios.c_ispeed; | |
# else | |
termios_p->c_ispeed = k_termios.c_cflag & (CBAUD | CBAUDEX); | |
# endif | |
#endif | |
#ifdef _HAVE_STRUCT_TERMIOS_C_OSPEED | |
# ifdef _HAVE_C_OSPEED | |
termios_p->c_ospeed = k_termios.c_ospeed; | |
# else | |
termios_p->c_ospeed = k_termios.c_cflag & (CBAUD | CBAUDEX); | |
# endif | |
#endif | |
if (sizeof (cc_t) == 1 || _POSIX_VDISABLE == 0 | |
|| (unsigned char) _POSIX_VDISABLE == (unsigned char) -1) | |
memset (__mempcpy (&termios_p->c_cc[0], &k_termios.c_cc[0], | |
__KERNEL_NCCS * sizeof (cc_t)), | |
_POSIX_VDISABLE, (NCCS - __KERNEL_NCCS) * sizeof (cc_t)); | |
else | |
{ | |
memcpy (&termios_p->c_cc[0], &k_termios.c_cc[0], | |
__KERNEL_NCCS * sizeof (cc_t)); | |
for (size_t cnt = __KERNEL_NCCS; cnt < NCCS; ++cnt) | |
termios_p->c_cc[cnt] = _POSIX_VDISABLE; | |
} | |
} | |
return retval; | |
} | |
weak_alias (__tcgetattr, tcgetattr) |