mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 19:21:05 +00:00
e5a50db36e
This patch consolidates the struct termios definition on its own header and adds arch-defined ones for ABIs that deviate from generic implementation. They are: - alpha which has a slight different layout than generic one (c_cc field is defined prior c_line). - sparc and mips which do not have the c_ispeed/c_ospeed fields. No semantic change is expected, checked on a build against x86_64-linux-gnu, alpha-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu. * sysdeps/unix/sysv/linux/alpha/bits/termios-struct.h: New file. * sysdeps/unix/sysv/linux/bits/termios-struct.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/termios-struct.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/termios-struct.h: Likewise. * sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add termios-struct.h. * sysdeps/unix/sysv/linux/bits/termios.h (struct termios): Move to termios-struct.h. * sysdeps/unix/sysv/linux/alpha/bits/termios.h (struct termios): Likewise. * sysdeps/unix/sysv/linux/mips/bits/termios.h (struct termios): Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/termios.h (struct termios): Likewise. * sysdeps/unix/sysv/linux/sparc/bits/termios.h (struct termios): Likewise. * sysdeps/unix/sysv/linux/kernel_termios.h (_HAVE_C_ISPEED, _HAVE_C_OSPEED): Define. * sysdeps/unix/sysv/linux/mips/kernel_termios.h (_HAVE_C_ISPEED, _HAVE_C_OSPEED): Likewise. * sysdeps/unix/sysv/linux/sparc/kernel_termios.h (_HAVE_C_ISPEED, _HAVE_C_OSPEED): Likewise. * sysdeps/unix/sysv/linux/speed.c [_HAVE_STRUCT_TERMIOS_C_OSPEED] (cfsetospeed): Check for define value instead of existence. [_HAVE_STRUCT_TERMIOS_C_ISPEED] (cfsetispeed): Likewise. * sysdeps/unix/sysv/linux/tcgetattr.c [_HAVE_STRUCT_TERMIOS_C_ISPEED && _HAVE_C_ISPEED] (__tcgetattr): Likewise. * sysdeps/unix/sysv/linux/tcsetattr.c [_HAVE_STRUCT_TERMIOS_C_ISPEED && _HAVE_C_ISPEED] (__tcsetattr): Likewise.
98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/* `struct termios' speed frobnication functions. Linux version.
|
|
Copyright (C) 1991-2019 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 <stddef.h>
|
|
#include <errno.h>
|
|
#include <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 `tcsetattr.c'. */
|
|
#define IBAUD0 020000000000
|
|
|
|
|
|
/* Return the output baud rate stored in *TERMIOS_P. */
|
|
speed_t
|
|
cfgetospeed (const struct termios *termios_p)
|
|
{
|
|
return termios_p->c_cflag & (CBAUD | CBAUDEX);
|
|
}
|
|
|
|
/* Return the input baud rate stored in *TERMIOS_P.
|
|
Although for Linux there is no difference between input and output
|
|
speed, the numerical 0 is a special case for the input baud rate. It
|
|
should set the input baud rate to the output baud rate. */
|
|
speed_t
|
|
cfgetispeed (const struct termios *termios_p)
|
|
{
|
|
return ((termios_p->c_iflag & IBAUD0)
|
|
? 0 : termios_p->c_cflag & (CBAUD | CBAUDEX));
|
|
}
|
|
|
|
/* Set the output baud rate stored in *TERMIOS_P to SPEED. */
|
|
int
|
|
cfsetospeed (struct termios *termios_p, speed_t speed)
|
|
{
|
|
if ((speed & ~CBAUD) != 0
|
|
&& (speed < B57600 || speed > __MAX_BAUD))
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
|
|
|
|
#if _HAVE_STRUCT_TERMIOS_C_OSPEED
|
|
termios_p->c_ospeed = speed;
|
|
#endif
|
|
termios_p->c_cflag &= ~(CBAUD | CBAUDEX);
|
|
termios_p->c_cflag |= speed;
|
|
|
|
return 0;
|
|
}
|
|
libc_hidden_def (cfsetospeed)
|
|
|
|
|
|
/* Set the input baud rate stored in *TERMIOS_P to SPEED.
|
|
Although for Linux there is no difference between input and output
|
|
speed, the numerical 0 is a special case for the input baud rate. It
|
|
should set the input baud rate to the output baud rate. */
|
|
int
|
|
cfsetispeed (struct termios *termios_p, speed_t speed)
|
|
{
|
|
if ((speed & ~CBAUD) != 0
|
|
&& (speed < B57600 || speed > __MAX_BAUD))
|
|
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
|
|
|
|
#if _HAVE_STRUCT_TERMIOS_C_ISPEED
|
|
termios_p->c_ispeed = speed;
|
|
#endif
|
|
if (speed == 0)
|
|
termios_p->c_iflag |= IBAUD0;
|
|
else
|
|
{
|
|
termios_p->c_iflag &= ~IBAUD0;
|
|
termios_p->c_cflag &= ~(CBAUD | CBAUDEX);
|
|
termios_p->c_cflag |= speed;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
libc_hidden_def (cfsetispeed)
|