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 MATTHIAS 24 * RINGWALD 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 <errno.h> 41 #include <stdio.h> 42 #include <unistd.h> 43 44 #include "btstack_run_loop.h" 45 #include <stdlib.h> 46 47 #include "btstack_stdin.h" 48 #include <termios.h> 49 50 static btstack_data_source_t stdin_source; 51 static int activated = 0; 52 53 void btstack_stdin_setup(void (*stdin_process)(btstack_data_source_t *_ds, btstack_data_source_callback_type_t callback_type)){ 54 55 if (activated) return; 56 57 // disable line buffering 58 struct termios term = {0}; 59 if (tcgetattr(0, &term) < 0) 60 perror("tcsetattr()"); 61 term.c_lflag &= ~ICANON; 62 term.c_lflag &= ~ECHO; 63 if (tcsetattr(0, TCSANOW, &term) < 0) { 64 perror("tcsetattr ICANON"); 65 } 66 67 btstack_run_loop_set_data_source_fd(&stdin_source, 0); // stdin 68 69 btstack_run_loop_enable_data_source_callbacks(&stdin_source, DATA_SOURCE_CALLBACK_READ); 70 btstack_run_loop_set_data_source_handler(&stdin_source, stdin_process); 71 btstack_run_loop_add_data_source(&stdin_source); 72 73 activated = 1; 74 } 75 76 void btstack_stdin_reset(void){ 77 if (!activated) return; 78 activated = 0; 79 80 btstack_run_loop_remove_data_source(&stdin_source); 81 82 struct termios term = {0}; 83 if (tcgetattr(0, &term) < 0){ 84 perror("tcsetattr()"); 85 } 86 term.c_lflag |= ICANON; 87 term.c_lflag |= ECHO; 88 if (tcsetattr(0, TCSANOW, &term) < 0){ 89 perror("tcsetattr ICANON"); 90 } 91 } 92 93 // read single byte after data source callback was triggered 94 char btstack_stdin_read(void){ 95 char data; 96 read(stdin_source.fd, &data, 1); 97 return data; 98 } 99