libc/include/android/legacy_termios_inlines.h

/*
 * Copyright (C) 2015 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 _ANDROID_LEGACY_TERMIOS_INLINES_H_
#define _ANDROID_LEGACY_TERMIOS_INLINES_H_

#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/types.h>

#include <linux/termios.h>

#if __ANDROID_API__ < __ANDROID_API_L__

__BEGIN_DECLS

static __inline int tcgetattr(int fd, struct termios *s) {
  return ioctl(fd, TCGETS, s);
}

static __inline int tcsetattr(int fd, int __opt, const struct termios *s) {
  return ioctl(fd, __opt, (void *)s);
}

static __inline int tcflow(int fd, int action) {
  return ioctl(fd, TCXONC, (void *)(intptr_t)action);
}

static __inline int tcflush(int fd, int __queue) {
  return ioctl(fd, TCFLSH, (void *)(intptr_t)__queue);
}

static __inline pid_t tcgetsid(int fd) {
  pid_t _pid;
  return ioctl(fd, TIOCGSID, &_pid) ? (pid_t)-1 : _pid;
}

static __inline int tcsendbreak(int fd, int __duration) {
  return ioctl(fd, TCSBRKP, (void *)(uintptr_t)__duration);
}

static __inline speed_t cfgetospeed(const struct termios *s) {
  return (speed_t)(s->c_cflag & CBAUD);
}

static __inline int cfsetospeed(struct termios *s, speed_t speed) {
  s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
  return 0;
}

static __inline speed_t cfgetispeed(const struct termios *s) {
  return (speed_t)(s->c_cflag & CBAUD);
}

static __inline int cfsetispeed(struct termios *s, speed_t speed) {
  s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
  return 0;
}

static __inline void cfmakeraw(struct termios *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;
}

static __inline int cfsetspeed(struct termios* s, speed_t speed) {
  // TODO: check 'speed' is valid.
  s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
  return 0;
}

static __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));
}

__END_DECLS

#endif
#endif /* _ANDROID_LEGACY_TERMIOS_INLINES_H_ */