| /* Copyright (C) 1992-2018 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; |
| } |
| |
| libc_hidden_def (__tcgetattr) |
| weak_alias (__tcgetattr, tcgetattr) |