1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifndef _BITS_TERMIOS_INLINES_H_
30 #define _BITS_TERMIOS_INLINES_H_
31
32 #include <sys/cdefs.h>
33
34 #include <errno.h>
35 #include <sys/ioctl.h>
36 #include <sys/types.h>
37
38 #include <linux/termios.h>
39
40 #if !defined(__BIONIC_TERMIOS_INLINE)
41 #define __BIONIC_TERMIOS_INLINE static __inline
42 #endif
43
44 __BEGIN_DECLS
45
46 // Supporting separate input and output speeds would require an ABI
47 // change for `struct termios`.
48
cfgetspeed(const struct termios * _Nonnull s)49 static __inline speed_t cfgetspeed(const struct termios* _Nonnull s) {
50 return __BIONIC_CAST(static_cast, speed_t, s->c_cflag & CBAUD);
51 }
52
cfgetispeed(const struct termios * _Nonnull s)53 __BIONIC_TERMIOS_INLINE speed_t cfgetispeed(const struct termios* _Nonnull s) {
54 return cfgetspeed(s);
55 }
56
cfgetospeed(const struct termios * _Nonnull s)57 __BIONIC_TERMIOS_INLINE speed_t cfgetospeed(const struct termios* _Nonnull s) {
58 return cfgetspeed(s);
59 }
60
cfmakeraw(struct termios * _Nonnull s)61 __BIONIC_TERMIOS_INLINE void cfmakeraw(struct termios* _Nonnull s) {
62 s->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
63 s->c_oflag &= ~OPOST;
64 s->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
65 s->c_cflag &= ~(CSIZE|PARENB);
66 s->c_cflag |= CS8;
67 s->c_cc[VMIN] = 1;
68 s->c_cc[VTIME] = 0;
69 }
70
cfsetspeed(struct termios * _Nonnull s,speed_t speed)71 __BIONIC_TERMIOS_INLINE int cfsetspeed(struct termios* _Nonnull s, speed_t speed) {
72 // CBAUD is 0x100f, and every matching bit pattern has a Bxxx constant.
73 if ((speed & ~CBAUD) != 0) {
74 errno = EINVAL;
75 return -1;
76 }
77 s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
78 return 0;
79 }
80
cfsetispeed(struct termios * _Nonnull s,speed_t speed)81 __BIONIC_TERMIOS_INLINE int cfsetispeed(struct termios* _Nonnull s, speed_t speed) {
82 return cfsetspeed(s, speed);
83 }
84
cfsetospeed(struct termios * _Nonnull s,speed_t speed)85 __BIONIC_TERMIOS_INLINE int cfsetospeed(struct termios* _Nonnull s, speed_t speed) {
86 return cfsetspeed(s, speed);
87 }
88
tcdrain(int fd)89 __BIONIC_TERMIOS_INLINE int tcdrain(int fd) {
90 // A non-zero argument to TCSBRK means "don't send a break".
91 // The drain is a side-effect of the ioctl!
92 return ioctl(fd, TCSBRK, __BIONIC_CAST(static_cast, unsigned long, 1));
93 }
94
tcflow(int fd,int action)95 __BIONIC_TERMIOS_INLINE int tcflow(int fd, int action) {
96 return ioctl(fd, TCXONC, __BIONIC_CAST(static_cast, unsigned long, action));
97 }
98
tcflush(int fd,int queue)99 __BIONIC_TERMIOS_INLINE int tcflush(int fd, int queue) {
100 return ioctl(fd, TCFLSH, __BIONIC_CAST(static_cast, unsigned long, queue));
101 }
102
tcgetattr(int fd,struct termios * _Nonnull s)103 __BIONIC_TERMIOS_INLINE int tcgetattr(int fd, struct termios* _Nonnull s) {
104 return ioctl(fd, TCGETS, s);
105 }
106
tcgetsid(int fd)107 __BIONIC_TERMIOS_INLINE pid_t tcgetsid(int fd) {
108 pid_t sid;
109 return (ioctl(fd, TIOCGSID, &sid) == -1) ? -1 : sid;
110 }
111
tcsendbreak(int fd,int duration)112 __BIONIC_TERMIOS_INLINE int tcsendbreak(int fd, int duration) {
113 return ioctl(fd, TCSBRKP, __BIONIC_CAST(static_cast, unsigned long, duration));
114 }
115
tcsetattr(int fd,int optional_actions,const struct termios * _Nonnull s)116 __BIONIC_TERMIOS_INLINE int tcsetattr(int fd, int optional_actions, const struct termios* _Nonnull s) {
117 int cmd;
118 switch (optional_actions) {
119 case TCSANOW: cmd = TCSETS; break;
120 case TCSADRAIN: cmd = TCSETSW; break;
121 case TCSAFLUSH: cmd = TCSETSF; break;
122 default: errno = EINVAL; return -1;
123 }
124 return ioctl(fd, cmd, s);
125 }
126
127 __END_DECLS
128
129 #endif
130