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/*
* Copyright (C) 2016 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _BITS_TERMIOS_INLINES_H_
#define _BITS_TERMIOS_INLINES_H_
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/termios.h>
#if !defined(__BIONIC_TERMIOS_INLINE)
#define __BIONIC_TERMIOS_INLINE static inline
#endif
__BEGIN_DECLS
// Supporting separate input and output speeds would require an ABI
// change for `struct termios`.
static inline speed_t cfgetspeed(const struct termios* _Nonnull s) {
return __BIONIC_CAST(static_cast, speed_t, s->c_cflag & CBAUD);
}
__BIONIC_TERMIOS_INLINE speed_t cfgetispeed(const struct termios* _Nonnull s) {
return cfgetspeed(s);
}
__BIONIC_TERMIOS_INLINE speed_t cfgetospeed(const struct termios* _Nonnull s) {
return cfgetspeed(s);
}
__BIONIC_TERMIOS_INLINE void cfmakeraw(struct termios* _Nonnull s) {
s->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
s->c_oflag &= ~OPOST;
s->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
s->c_cflag &= ~(CSIZE|PARENB);
s->c_cflag |= CS8;
s->c_cc[VMIN] = 1;
s->c_cc[VTIME] = 0;
}
__BIONIC_TERMIOS_INLINE int cfsetspeed(struct termios* _Nonnull s, speed_t speed) {
// CBAUD is 0x100f, and every matching bit pattern has a Bxxx constant.
if ((speed & ~CBAUD) != 0) {
errno = EINVAL;
return -1;
}
s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
return 0;
}
__BIONIC_TERMIOS_INLINE int cfsetispeed(struct termios* _Nonnull s, speed_t speed) {
return cfsetspeed(s, speed);
}
__BIONIC_TERMIOS_INLINE int cfsetospeed(struct termios* _Nonnull s, speed_t speed) {
return cfsetspeed(s, speed);
}
__BIONIC_TERMIOS_INLINE int tcdrain(int fd) {
// A non-zero argument to TCSBRK means "don't send a break".
// The drain is a side-effect of the ioctl!
return ioctl(fd, TCSBRK, __BIONIC_CAST(static_cast, unsigned long, 1));
}
__BIONIC_TERMIOS_INLINE int tcflow(int fd, int action) {
return ioctl(fd, TCXONC, __BIONIC_CAST(static_cast, unsigned long, action));
}
__BIONIC_TERMIOS_INLINE int tcflush(int fd, int queue) {
return ioctl(fd, TCFLSH, __BIONIC_CAST(static_cast, unsigned long, queue));
}
__BIONIC_TERMIOS_INLINE int tcgetattr(int fd, struct termios* _Nonnull s) {
return ioctl(fd, TCGETS, s);
}
__BIONIC_TERMIOS_INLINE pid_t tcgetsid(int fd) {
pid_t sid;
return (ioctl(fd, TIOCGSID, &sid) == -1) ? -1 : sid;
}
__BIONIC_TERMIOS_INLINE int tcsendbreak(int fd, int duration) {
return ioctl(fd, TCSBRKP, __BIONIC_CAST(static_cast, unsigned long, duration));
}
__BIONIC_TERMIOS_INLINE int tcsetattr(int fd, int optional_actions, const struct termios* _Nonnull s) {
int cmd;
switch (optional_actions) {
case TCSANOW: cmd = TCSETS; break;
case TCSADRAIN: cmd = TCSETSW; break;
case TCSAFLUSH: cmd = TCSETSF; break;
default: errno = EINVAL; return -1;
}
return ioctl(fd, cmd, s);
}
__END_DECLS
#endif
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