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 * contact@bluekitchen-gmbh.com 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