1 /*
2 * Copyright (C) 2008 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 #include <termios.h>
30 #include <unistd.h>
31
cfgetspeed(const termios * s)32 static speed_t cfgetspeed(const termios* s) {
33 return (s->c_cflag & CBAUD);
34 }
35
cfgetispeed(const termios * s)36 speed_t cfgetispeed(const termios* s) {
37 return cfgetspeed(s);
38 }
39
cfgetospeed(const termios * s)40 speed_t cfgetospeed(const termios* s) {
41 return cfgetspeed(s);
42 }
43
cfmakeraw(termios * s)44 void cfmakeraw(termios* s) {
45 s->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
46 s->c_oflag &= ~OPOST;
47 s->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
48 s->c_cflag &= ~(CSIZE|PARENB);
49 s->c_cflag |= CS8;
50 }
51
cfsetispeed(termios * s,speed_t speed)52 int cfsetispeed(termios* s, speed_t speed) {
53 return cfsetspeed(s, speed);
54 }
55
cfsetospeed(termios * s,speed_t speed)56 int cfsetospeed(termios* s, speed_t speed) {
57 return cfsetspeed(s, speed);
58 }
59
cfsetspeed(termios * s,speed_t speed)60 int cfsetspeed(termios* s, speed_t speed) {
61 // TODO: check 'speed' is valid.
62 s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
63 return 0;
64 }
65
tcdrain(int fd)66 int tcdrain(int fd) {
67 // A non-zero argument to TCSBRK means "don't send a break".
68 // The drain is a side-effect of the ioctl!
69 return ioctl(fd, TCSBRK, static_cast<unsigned long>(1));
70 }
71
tcflow(int fd,int action)72 int tcflow(int fd, int action) {
73 return ioctl(fd, TCXONC, static_cast<unsigned long>(action));
74 }
75
tcflush(int fd,int queue)76 int tcflush(int fd, int queue) {
77 return ioctl(fd, TCFLSH, static_cast<unsigned long>(queue));
78 }
79
tcgetattr(int fd,termios * s)80 int tcgetattr(int fd, termios* s) {
81 return ioctl(fd, TCGETS, s);
82 }
83
tcgetsid(int fd)84 pid_t tcgetsid(int fd) {
85 pid_t sid;
86 if (ioctl(fd, TIOCGSID, &sid) == -1) {
87 return -1;
88 }
89 return sid;
90 }
91
tcsendbreak(int fd,int duration)92 int tcsendbreak(int fd, int duration) {
93 return ioctl(fd, TCSBRKP, static_cast<unsigned long>(duration));
94 }
95
tcsetattr(int fd,int optional_actions,const termios * s)96 int tcsetattr(int fd, int optional_actions, const termios* s) {
97 int cmd;
98 switch (optional_actions) {
99 case TCSANOW: cmd = TCSETS; break;
100 case TCSADRAIN: cmd = TCSETSW; break;
101 case TCSAFLUSH: cmd = TCSETSF; break;
102 default: errno = EINVAL; return -1;
103 }
104 return ioctl(fd, cmd, s);
105 }
106
tcgetpgrp(int fd)107 pid_t tcgetpgrp(int fd) {
108 pid_t pid;
109 if (ioctl(fd, TIOCGPGRP, &pid) == -1) {
110 return -1;
111 }
112 return pid;
113 }
114
tcsetpgrp(int fd,pid_t pid)115 int tcsetpgrp(int fd, pid_t pid) {
116 return ioctl(fd, TIOCSPGRP, &pid);
117 }
118