1 /*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #define _CRT_SECURE_NO_DEPRECATE 1
29
30 #include <assert.h>
31
32 #ifdef POSIX
33 #include <signal.h>
34 #include <termios.h>
35 #include <unistd.h>
36 #endif // POSIX
37
38 #include "talk/examples/call/callclient.h"
39 #include "talk/examples/call/console.h"
40 #include "webrtc/base/logging.h"
41 #include "webrtc/base/messagequeue.h"
42 #include "webrtc/base/stringutils.h"
43
44 #ifdef POSIX
DoNothing(int unused)45 static void DoNothing(int unused) {}
46 #endif
47
Console(rtc::Thread * thread,CallClient * client)48 Console::Console(rtc::Thread *thread, CallClient *client) :
49 client_(client),
50 client_thread_(thread),
51 stopped_(false) {}
52
~Console()53 Console::~Console() {
54 Stop();
55 }
56
Start()57 void Console::Start() {
58 if (stopped_) {
59 // stdin was closed in Stop(), so we can't restart.
60 LOG(LS_ERROR) << "Cannot re-start";
61 return;
62 }
63 if (console_thread_) {
64 LOG(LS_WARNING) << "Already started";
65 return;
66 }
67 console_thread_.reset(new rtc::Thread());
68 console_thread_->Start();
69 console_thread_->Post(this, MSG_START);
70 }
71
Stop()72 void Console::Stop() {
73 if (console_thread_) {
74 #ifdef WIN32
75 CloseHandle(GetStdHandle(STD_INPUT_HANDLE));
76 #else
77 close(fileno(stdin));
78 // This forces the read() in fgets() to return with errno = EINTR. fgets()
79 // will retry the read() and fail, thus returning.
80 pthread_kill(console_thread_->GetPThread(), SIGUSR1);
81 #endif
82 console_thread_->Stop();
83 console_thread_.reset();
84 stopped_ = true;
85 }
86 }
87
SetEcho(bool on)88 void Console::SetEcho(bool on) {
89 #ifdef WIN32
90 HANDLE hIn = GetStdHandle(STD_INPUT_HANDLE);
91 if ((hIn == INVALID_HANDLE_VALUE) || (hIn == NULL))
92 return;
93
94 DWORD mode;
95 if (!GetConsoleMode(hIn, &mode))
96 return;
97
98 if (on) {
99 mode = mode | ENABLE_ECHO_INPUT;
100 } else {
101 mode = mode & ~ENABLE_ECHO_INPUT;
102 }
103
104 SetConsoleMode(hIn, mode);
105 #else
106 const int fd = fileno(stdin);
107 if (fd == -1)
108 return;
109
110 struct termios tcflags;
111 if (tcgetattr(fd, &tcflags) == -1)
112 return;
113
114 if (on) {
115 tcflags.c_lflag |= ECHO;
116 } else {
117 tcflags.c_lflag &= ~ECHO;
118 }
119
120 tcsetattr(fd, TCSANOW, &tcflags);
121 #endif
122 }
123
PrintLine(const char * format,...)124 void Console::PrintLine(const char* format, ...) {
125 va_list ap;
126 va_start(ap, format);
127
128 char buf[4096];
129 int size = vsnprintf(buf, sizeof(buf), format, ap);
130 assert(size >= 0);
131 assert(size < static_cast<int>(sizeof(buf)));
132 buf[size] = '\0';
133 printf("%s\n", buf);
134 fflush(stdout);
135
136 va_end(ap);
137 }
138
RunConsole()139 void Console::RunConsole() {
140 char input_buffer[128];
141 while (fgets(input_buffer, sizeof(input_buffer), stdin) != NULL) {
142 client_thread_->Post(this, MSG_INPUT,
143 new rtc::TypedMessageData<std::string>(input_buffer));
144 }
145 }
146
OnMessage(rtc::Message * msg)147 void Console::OnMessage(rtc::Message *msg) {
148 switch (msg->message_id) {
149 case MSG_START:
150 #ifdef POSIX
151 // Install a no-op signal so that we can abort RunConsole() by raising
152 // SIGUSR1.
153 struct sigaction act;
154 act.sa_handler = &DoNothing;
155 sigemptyset(&act.sa_mask);
156 act.sa_flags = 0;
157 if (sigaction(SIGUSR1, &act, NULL) < 0) {
158 LOG(LS_WARNING) << "Can't install signal";
159 }
160 #endif
161 RunConsole();
162 break;
163 case MSG_INPUT:
164 rtc::TypedMessageData<std::string> *data =
165 static_cast<rtc::TypedMessageData<std::string>*>(msg->pdata);
166 client_->ParseLine(data->data());
167 break;
168 }
169 }
170