1 | #include <stdio.h>
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2 | #include <stdlib.h>
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3 | #include <string.h>
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4 | #include <fcntl.h>
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5 | #include <linux/input.h>
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6 | #include <linux/uinput.h>
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7 | #include <signal.h>
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8 | #include <X11/Xlib.h>
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9 |
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10 | static int fd;
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11 |
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12 | struct coords {
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13 | int x;
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14 | int y;
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15 | };
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16 |
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17 | void close_pointer() {
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18 | ioctl(fd, UI_DEV_DESTROY);
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19 | close(fd);
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20 | }
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21 |
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22 | // Close stuff nicely in case of issues
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23 | void ex_program(int sig) {
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24 | close_pointer();
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25 | printf("Terminated signal: %d\n", sig);
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26 | (void) signal(SIGINT, SIG_DFL);
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27 | exit(-1);
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28 | }
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29 |
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30 | // Wrapper to send cool stuff over the wire
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31 | int send_event(int fd, __u16 type, __u16 code, __s32 value)
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32 | {
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33 | struct input_event event;
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34 |
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35 | memset(&event, 0, sizeof(event));
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36 | event.type = type;
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37 | event.code = code;
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38 | event.value = value;
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39 | gettimeofday(&event.time, NULL);
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40 |
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41 | if (write(fd, &event, sizeof(event)) != sizeof(event)) {
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42 | fprintf(stderr, "Error on send_event");
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43 | return -1;
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44 | }
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45 |
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46 | return 0;
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47 | }
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48 |
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49 | //XXX: Make me more effient
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50 | struct coords
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51 | get_coords() {
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52 | Display *dsp = XOpenDisplay( NULL );
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53 |
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54 | struct coords xy_current = { -1, -1 };
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55 | if( !dsp ){ return xy_current; }
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56 |
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57 | int screenNumber = DefaultScreen(dsp);
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58 |
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59 | XEvent event;
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60 |
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61 | /* get info about current pointer position */
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62 | XQueryPointer(dsp, RootWindow(dsp, screenNumber),
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63 | &event.xbutton.root, &event.xbutton.window,
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64 | &event.xbutton.x_root, &event.xbutton.y_root,
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65 | &event.xbutton.x, &event.xbutton.y,
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66 | &event.xbutton.state);
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67 |
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68 | //printf("Mouse Coordinates: %d %d\n", event.xbutton.x, event.xbutton.y);
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69 | XCloseDisplay( dsp );
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70 | xy_current.x = event.xbutton.x;
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71 | xy_current.y = event.xbutton.y;
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72 | return(xy_current);
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73 | }
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74 |
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75 |
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76 | // Set the pointer to a certain location
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77 | int
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78 | init_pointer()
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79 | {
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80 | int i;
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81 | struct uinput_user_dev device;
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82 | memset(&device, 0, sizeof device);
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83 |
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84 | fd=open("/dev/uinput",O_WRONLY | O_NDELAY);
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85 | strcpy(device.name,"test mouse");
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86 |
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87 | device.id.bustype=BUS_USB;
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88 | device.id.vendor= 0x0001;
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89 | device.id.product=0x0001;
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90 | device.id.version=UINPUT_VERSION;
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91 |
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92 | for (i=0; i < ABS_MAX; i++) {
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93 | device.absmax[i] = -1;
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94 | device.absmin[i] = -1;
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95 | device.absfuzz[i] = -1;
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96 | device.absflat[i] = -1;
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97 | }
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98 |
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99 | if (write(fd,&device,sizeof(device)) != sizeof(device))
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100 | {
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101 | fprintf(stderr, "error setup\n");
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102 | return -1;
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103 | }
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104 |
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105 | (void) signal(SIGINT, ex_program);
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106 |
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107 | /* mousedev only recognize our device as a mouse
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108 | * if it has at least two axis and one left button.
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109 | * Also, mouse buttons have to send sync events.
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110 | */
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111 | ioctl(fd, UI_SET_EVBIT, EV_KEY);
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112 | ioctl(fd, UI_SET_EVBIT, EV_REL);
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113 | ioctl(fd, UI_SET_EVBIT, EV_SYN);
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114 |
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115 | ioctl(fd, UI_SET_RELBIT, REL_X);
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116 | ioctl(fd, UI_SET_RELBIT, REL_Y);
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117 | ioctl(fd, UI_SET_RELBIT, REL_WHEEL);
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118 |
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119 | ioctl(fd, UI_SET_KEYBIT, BTN_LEFT);
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120 | ioctl(fd, UI_SET_KEYBIT, BTN_RIGHT);
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121 | ioctl(fd, UI_SET_KEYBIT, BTN_MIDDLE);
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122 |
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123 | for (i=0; i < 256; i++) {
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124 | ioctl(fd, UI_SET_KEYBIT, i);
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125 | }
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126 |
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127 | ioctl(fd, UI_DEV_CREATE, NULL);
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128 |
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129 | }
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130 |
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131 | int set_pointer(const struct coords xy_target) {
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132 | struct coords xy_current, xy_diff;
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133 | // Force pointer to absolute location on the screen
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134 | while ( 1 ) {
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135 | xy_current = get_coords();
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136 | xy_diff.x = -(xy_current.x - xy_target.x);
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137 | xy_diff.y = -(xy_current.y - xy_target.y);
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138 | if (xy_diff.x == 0 && xy_diff.y == 0) {
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139 | break;
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140 | } else {
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141 | printf("Trying to sync current:%ix%i target:%ix%i diff:%ix%i\n",
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142 | xy_current.x, xy_current.y,
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143 | xy_target.x, xy_target.y,
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144 | xy_diff.x, xy_diff.y);
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145 | send_event(fd, EV_REL, REL_X, xy_diff.x);
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146 | send_event(fd, EV_REL, REL_Y, xy_diff.y);
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147 | send_event(fd, EV_SYN, SYN_REPORT, 0);
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148 | // Wait some small period of time to get it populated (and the screen get updated
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149 | usleep(2000000);
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150 | break;
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151 | }
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152 | }
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153 | }
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154 |
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155 | int
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156 | main() {
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157 | struct coords xy_target = { 500,500 };
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158 | init_pointer();
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159 | set_pointer(xy_target);
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160 | xy_target.x = 700;
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161 | xy_target.y = 700;
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162 | set_pointer(xy_target);
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163 | close_pointer();
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164 | return(0);
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165 | }
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