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 <errno.h>
30 #include <termios.h>
31 #include <unistd.h>
32
cfgetspeed(const termios * s)33 static speed_t cfgetspeed(const termios* s) {
34 return (s->c_cflag & CBAUD);
35 }
36
cfgetispeed(const termios * s)37 speed_t cfgetispeed(const termios* s) {
38 return cfgetspeed(s);
39 }
40
cfgetospeed(const termios * s)41 speed_t cfgetospeed(const termios* s) {
42 return cfgetspeed(s);
43 }
44
cfmakeraw(termios * s)45 void cfmakeraw(termios* s) {
46 s->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
47 s->c_oflag &= ~OPOST;
48 s->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
49 s->c_cflag &= ~(CSIZE|PARENB);
50 s->c_cflag |= CS8;
51 }
52
cfsetispeed(termios * s,speed_t speed)53 int cfsetispeed(termios* s, speed_t speed) {
54 return cfsetspeed(s, speed);
55 }
56
cfsetospeed(termios * s,speed_t speed)57 int cfsetospeed(termios* s, speed_t speed) {
58 return cfsetspeed(s, speed);
59 }
60
cfsetspeed(termios * s,speed_t speed)61 int cfsetspeed(termios* s, speed_t speed) {
62 // TODO: check 'speed' is valid.
63 s->c_cflag = (s->c_cflag & ~CBAUD) | (speed & CBAUD);
64 return 0;
65 }
66
tcdrain(int fd)67 int tcdrain(int fd) {
68 // A non-zero argument to TCSBRK means "don't send a break".
69 // The drain is a side-effect of the ioctl!
70 return ioctl(fd, TCSBRK, static_cast<unsigned long>(1));
71 }
72
tcflow(int fd,int action)73 int tcflow(int fd, int action) {
74 return ioctl(fd, TCXONC, static_cast<unsigned long>(action));
75 }
76
tcflush(int fd,int queue)77 int tcflush(int fd, int queue) {
78 return ioctl(fd, TCFLSH, static_cast<unsigned long>(queue));
79 }
80
tcgetattr(int fd,termios * s)81 int tcgetattr(int fd, termios* s) {
82 return ioctl(fd, TCGETS, s);
83 }
84
tcgetsid(int fd)85 pid_t tcgetsid(int fd) {
86 pid_t sid;
87 if (ioctl(fd, TIOCGSID, &sid) == -1) {
88 return -1;
89 }
90 return sid;
91 }
92
tcsendbreak(int fd,int duration)93 int tcsendbreak(int fd, int duration) {
94 return ioctl(fd, TCSBRKP, static_cast<unsigned long>(duration));
95 }
96
tcsetattr(int fd,int optional_actions,const termios * s)97 int tcsetattr(int fd, int optional_actions, const termios* s) {
98 int cmd;
99 switch (optional_actions) {
100 case TCSANOW: cmd = TCSETS; break;
101 case TCSADRAIN: cmd = TCSETSW; break;
102 case TCSAFLUSH: cmd = TCSETSF; break;
103 default: errno = EINVAL; return -1;
104 }
105 return ioctl(fd, cmd, s);
106 }
107
tcgetpgrp(int fd)108 pid_t tcgetpgrp(int fd) {
109 pid_t pid;
110 if (ioctl(fd, TIOCGPGRP, &pid) == -1) {
111 return -1;
112 }
113 return pid;
114 }
115
tcsetpgrp(int fd,pid_t pid)116 int tcsetpgrp(int fd, pid_t pid) {
117 return ioctl(fd, TIOCSPGRP, &pid);
118 }
119