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annotate uinput.c @ 9:5e15d64a2d24 default tip

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If somebody closed stdin, fd could be both valid and 0, don’t check for that.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 18 Aug 2015 02:09:55 +0100
parents dec5fe6cd0d0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include "uinput.h"
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2 #include "ds.h"
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3 #include "service.h"
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4
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5 #include <stdio.h>
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6 #include <fcntl.h>
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7 #include <string.h>
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8 #include <sys/ioctl.h>
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9 #include <unistd.h>
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10 #include <stdbool.h>
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12
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13 #define DS_NAME "Nintendo 3DS"
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15 /* Not found these values... but it's not important! */
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16 #define DS_VENDOR 0xdead
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17 #define DS_PRODUCT 0xbeef
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18 #define DS_VERSION 0x00
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22 /*
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23 Create a new uinput device
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24 Returns: file descriptor (-1 if error)
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25 */
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26 int init_uinput_device(void){
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27 struct uinput_user_dev dev;
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28 int fd = -1;
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30 if(uinput_dev == NULL){
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31 fd = open("/dev/uinput", O_WRONLY);
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33 if(fd < 0){
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34 perror("open");
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35 fd = open("/dev/misc/uinput", O_WRONLY);
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36 }
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37
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38 if(fd < 0){
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39 perror("open");
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40 fd = open("/dev/input/uinput", O_WRONLY);
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41 }
0
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42 }
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43 else fd = open(uinput_dev, O_WRONLY); //from xml
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45 if(fd < 0){
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46 perror("open");
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47 fprintf(stderr, " [%d] Unable to open uinput device ; hint: 'modprobe uinput' ?!\n", curdev);
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48 return -1;
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49 }
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53 memset(&dev, 0, sizeof(dev));
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54 strncpy(dev.name, DS_NAME, UINPUT_MAX_NAME_SIZE);
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55 dev.id.bustype = 0;
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56 dev.id.vendor = DS_VENDOR;
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57 dev.id.product = DS_PRODUCT;
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58 dev.id.version = DS_VERSION;
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59
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60 // Circle pad
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61 dev.absmax[ABS_X] = PAD_MAX;
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62 dev.absmin[ABS_X] = -PAD_MAX;
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63 dev.absfuzz[ABS_X] = 4;
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64 dev.absflat[ABS_X] = 2;
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66 dev.absmax[ABS_Y] = PAD_MAX;
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67 dev.absmin[ABS_Y] = -PAD_MAX;
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68 dev.absfuzz[ABS_Y] = 4;
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69 dev.absflat[ABS_Y] = 2;
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71
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72 // C pad
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73 dev.absmax[ABS_RX] = PAD_MAX;
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74 dev.absmin[ABS_RX] = -PAD_MAX;
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75 dev.absfuzz[ABS_RX] = 4;
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76 dev.absflat[ABS_RX] = 2;
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77
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78 dev.absmax[ABS_RY] = PAD_MAX;
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79 dev.absmin[ABS_RY] = -PAD_MAX;
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80 dev.absfuzz[ABS_RY] = 4;
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81 dev.absflat[ABS_RY] = 2;
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82
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83
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84 if(write(fd, &dev, sizeof(dev)) < (ssize_t)sizeof(dev)){
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85 fprintf(stderr, " [%d] Registering device at uinput failed\n", curdev);
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86 return -1;
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87 }
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89 /* Keys [01] (found in <linux/input.h>) */
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90 if( ioctl(fd, UI_SET_EVBIT, EV_KEY) ) return -1;
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91 if( ioctl(fd, UI_SET_KEYBIT, BTN_A) ) return -1;
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92 if( ioctl(fd, UI_SET_KEYBIT, BTN_B) ) return -1;
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93 if( ioctl(fd, UI_SET_KEYBIT, BTN_X) ) return -1;
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94 if( ioctl(fd, UI_SET_KEYBIT, BTN_Y) ) return -1;
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95 if( ioctl(fd, UI_SET_KEYBIT, BTN_TL) ) return -1;
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96 if( ioctl(fd, UI_SET_KEYBIT, BTN_TR) ) return -1;
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97 if( ioctl(fd, UI_SET_KEYBIT, BTN_TL2) ) return -1;
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98 if( ioctl(fd, UI_SET_KEYBIT, BTN_TR2) ) return -1;
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99 if( ioctl(fd, UI_SET_KEYBIT, BTN_START) ) return -1;
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100 if( ioctl(fd, UI_SET_KEYBIT, BTN_SELECT)) return -1;
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101 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_UP)) return -1;
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102 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_DOWN)) return -1;
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103 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_LEFT)) return -1;
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104 if( ioctl(fd, UI_SET_KEYBIT, BTN_DPAD_RIGHT)) return -1;
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105
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106 /* D-Pad [-0xFFFF - 0xFFFF] */
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107 if( ioctl(fd, UI_SET_EVBIT, EV_ABS) ) return -1;
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108 if( ioctl(fd, UI_SET_ABSBIT, ABS_X) ) return -1;
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109 if( ioctl(fd, UI_SET_ABSBIT, ABS_Y) ) return -1;
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110 if( ioctl(fd, UI_SET_ABSBIT, ABS_RX) ) return -1;
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111 if( ioctl(fd, UI_SET_ABSBIT, ABS_RY) ) return -1;
0
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112
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113
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114 /* Register device */
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115 if( ioctl(fd, UI_DEV_CREATE) ) return -1;
2
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116
0
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117 return fd;
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118 }
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119
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120
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121 /*
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122 Send an event into the uinput device
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123 Returns: TRUE, FALSE
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124 */
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125 int do_uinput(int fd, unsigned short key, int pressed, unsigned short event_type){
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126 struct input_event event;
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127 memset(&event, 0 , sizeof(event));
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128
0
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129 event.type = event_type;
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130 event.code = key;
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131 event.value = pressed;
2
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132
0
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133 if(write(fd,&event,sizeof(event)) != sizeof(event)){
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134 fprintf(stderr, " [%d] Writing event to uinput driver failed ; Aborting\n", curdev);
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135 return false;
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136 }
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137 return true;
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138 }
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139
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140
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141 /*
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142 Synchonize events
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143 */
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144 void flush_uinput(int fd){
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145 struct input_event event;
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146 memset(&event, 0 , sizeof(event));
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147
0
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148 event.type = EV_SYN;
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149 event.code = SYN_REPORT;
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150
9
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151 if(write(fd, &event, sizeof(event)) != sizeof(event))
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152 fprintf(stderr, " [%d] Flushing uinput failed\n", curdev);
0
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153 }
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154
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155
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156
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157
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158