| /* Copyright (C) 1993-2014 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 <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> |
| |
| |
| /* This is a gross hack around a kernel bug. If the cfsetispeed functions |
| is called with the SPEED argument set to zero this means use the same |
| speed as for output. But we don't have independent input and output |
| speeds and therefore cannot record this. |
| |
| We use an unused bit in the `c_iflag' field to keep track of this |
| use of `cfsetispeed'. The value here must correspond to the one used |
| in `speed.c'. */ |
| #define IBAUD0 020000000000 |
| |
| |
| /* Set the state of FD to *TERMIOS_P. */ |
| int |
| tcsetattr (fd, optional_actions, termios_p) |
| int fd; |
| int optional_actions; |
| const struct termios *termios_p; |
| { |
| struct __kernel_termios k_termios; |
| unsigned long int cmd; |
| |
| switch (optional_actions) |
| { |
| case TCSANOW: |
| cmd = TCSETS; |
| break; |
| case TCSADRAIN: |
| cmd = TCSETSW; |
| break; |
| case TCSAFLUSH: |
| cmd = TCSETSF; |
| break; |
| default: |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| k_termios.c_iflag = termios_p->c_iflag & ~IBAUD0; |
| k_termios.c_oflag = termios_p->c_oflag; |
| k_termios.c_cflag = termios_p->c_cflag; |
| k_termios.c_lflag = termios_p->c_lflag; |
| k_termios.c_line = termios_p->c_line; |
| #if defined _HAVE_C_ISPEED && defined _HAVE_STRUCT_TERMIOS_C_ISPEED |
| k_termios.c_ispeed = termios_p->c_ispeed; |
| #endif |
| #if defined _HAVE_C_OSPEED && defined _HAVE_STRUCT_TERMIOS_C_OSPEED |
| k_termios.c_ospeed = termios_p->c_ospeed; |
| #endif |
| memcpy (&k_termios.c_cc[0], &termios_p->c_cc[0], |
| __KERNEL_NCCS * sizeof (cc_t)); |
| |
| return INLINE_SYSCALL (ioctl, 3, fd, cmd, &k_termios); |
| } |
| libc_hidden_def (tcsetattr) |