mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 01:21:06 +00:00
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/* Copyright (C) 1993-2016 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 <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 (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:
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
|
|
}
|
|
|
|
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)
|