1 /*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holders nor the names of
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * 4. Any redistribution, use, or modification is done solely for
17 * personal benefit and not for any commercial purpose or for
18 * monetary gain.
19 *
20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * Please inquire about commercial licensing options at
34 * [email protected]
35 *
36 */
37
38 #define BTSTACK_FILE__ "btstack_stdin_posix.c"
39
40 #include <stdio.h>
41 #include <unistd.h>
42
43 #include "btstack_debug.h"
44 #include "btstack_run_loop.h"
45
46 #include "btstack_stdin.h"
47 #include <termios.h>
48
49 static btstack_data_source_t stdin_source;
50 static int activated = 0;
51 static void (*stdin_handler)(char c);
52
53 // read single byte after data source callback was triggered
stdin_process(btstack_data_source_t * ds,btstack_data_source_callback_type_t callback_type)54 static void stdin_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type){
55 UNUSED(ds);
56 UNUSED(callback_type);
57
58 char data;
59 int result = read(stdin_source.source.fd, &data, 1);
60 if (result < 1) return;
61 if (stdin_handler == NULL) return;
62
63 #ifdef ENABLE_BTSTACK_STDIN_LOGGING
64 log_info("stdin: %c", data);
65 #endif
66
67 (*stdin_handler)(data);
68 }
69
btstack_stdin_setup(void (* handler)(char c))70 void btstack_stdin_setup(void (*handler)(char c)){
71
72 if (activated) return;
73
74 // disable line buffering
75 struct termios term = {0};
76 if (tcgetattr(0, &term) < 0)
77 perror("tcsetattr()");
78 term.c_lflag &= ~ICANON;
79 term.c_lflag &= ~ECHO;
80 if (tcsetattr(0, TCSANOW, &term) < 0) {
81 perror("tcsetattr ICANON");
82 }
83
84 stdin_handler = handler;
85
86 btstack_run_loop_set_data_source_fd(&stdin_source, 0); // stdin
87
88 btstack_run_loop_enable_data_source_callbacks(&stdin_source, DATA_SOURCE_CALLBACK_READ);
89 btstack_run_loop_set_data_source_handler(&stdin_source, stdin_process);
90 btstack_run_loop_add_data_source(&stdin_source);
91
92 activated = 1;
93 }
94
btstack_stdin_reset(void)95 void btstack_stdin_reset(void){
96 if (!activated) return;
97 activated = 0;
98 stdin_handler = NULL;
99
100 btstack_run_loop_remove_data_source(&stdin_source);
101
102 struct termios term = {0};
103 if (tcgetattr(0, &term) < 0){
104 perror("tcsetattr()");
105 }
106 term.c_lflag |= ICANON;
107 term.c_lflag |= ECHO;
108 if (tcsetattr(0, TCSANOW, &term) < 0){
109 perror("tcsetattr ICANON");
110 }
111 }
112
113