1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2013 Red Hat, Inc.
4 */
5
6 #include "config.h"
7
8 #include <assert.h>
9 #include <errno.h>
10 #include <fcntl.h>
11 #include <linux/input.h>
12 #include <stdio.h>
13 #include <string.h>
14 #include <sys/stat.h>
15 #include <sys/types.h>
16
17 #include "libevdev/libevdev.h"
18
19 static void
print_abs_bits(struct libevdev * dev,int axis)20 print_abs_bits(struct libevdev *dev, int axis)
21 {
22 const struct input_absinfo *abs;
23
24 if (!libevdev_has_event_code(dev, EV_ABS, axis))
25 return;
26
27 abs = libevdev_get_abs_info(dev, axis);
28
29 printf(" Value %6d\n", abs->value);
30 printf(" Min %6d\n", abs->minimum);
31 printf(" Max %6d\n", abs->maximum);
32 if (abs->fuzz)
33 printf(" Fuzz %6d\n", abs->fuzz);
34 if (abs->flat)
35 printf(" Flat %6d\n", abs->flat);
36 if (abs->resolution)
37 printf(" Resolution %6d\n", abs->resolution);
38 }
39
40 static void
print_code_bits(struct libevdev * dev,unsigned int type,unsigned int max)41 print_code_bits(struct libevdev *dev, unsigned int type, unsigned int max)
42 {
43 unsigned int i;
44 for (i = 0; i <= max; i++) {
45 if (!libevdev_has_event_code(dev, type, i))
46 continue;
47
48 printf(" Event code %i (%s)\n", i, libevdev_event_code_get_name(type, i));
49 if (type == EV_ABS)
50 print_abs_bits(dev, i);
51 }
52 }
53
54 static void
print_bits(struct libevdev * dev)55 print_bits(struct libevdev *dev)
56 {
57 unsigned int i;
58 printf("Supported events:\n");
59
60 for (i = 0; i <= EV_MAX; i++) {
61 if (libevdev_has_event_type(dev, i))
62 printf(" Event type %d (%s)\n", i, libevdev_event_type_get_name(i));
63 switch(i) {
64 case EV_KEY:
65 print_code_bits(dev, EV_KEY, KEY_MAX);
66 break;
67 case EV_REL:
68 print_code_bits(dev, EV_REL, REL_MAX);
69 break;
70 case EV_ABS:
71 print_code_bits(dev, EV_ABS, ABS_MAX);
72 break;
73 case EV_LED:
74 print_code_bits(dev, EV_LED, LED_MAX);
75 break;
76 }
77 }
78 }
79
80 static void
print_props(struct libevdev * dev)81 print_props(struct libevdev *dev)
82 {
83 unsigned int i;
84 printf("Properties:\n");
85
86 for (i = 0; i <= INPUT_PROP_MAX; i++) {
87 if (libevdev_has_property(dev, i))
88 printf(" Property type %d (%s)\n", i,
89 libevdev_property_get_name(i));
90 }
91 }
92
93 static int
print_event(struct input_event * ev)94 print_event(struct input_event *ev)
95 {
96 if (ev->type == EV_SYN)
97 printf("Event: time %ld.%06ld, ++++++++++++++++++++ %s +++++++++++++++\n",
98 ev->input_event_sec,
99 ev->input_event_usec,
100 libevdev_event_type_get_name(ev->type));
101 else
102 printf("Event: time %ld.%06ld, type %d (%s), code %d (%s), value %d\n",
103 ev->input_event_sec,
104 ev->input_event_usec,
105 ev->type,
106 libevdev_event_type_get_name(ev->type),
107 ev->code,
108 libevdev_event_code_get_name(ev->type, ev->code),
109 ev->value);
110 return 0;
111 }
112
113 static int
print_sync_event(struct input_event * ev)114 print_sync_event(struct input_event *ev)
115 {
116 printf("SYNC: ");
117 print_event(ev);
118 return 0;
119 }
120
121 int
main(int argc,char ** argv)122 main(int argc, char **argv)
123 {
124 struct libevdev *dev = NULL;
125 const char *file;
126 int fd;
127 int rc = 1;
128
129 if (argc < 2)
130 goto out;
131
132 file = argv[1];
133 fd = open(file, O_RDONLY);
134 if (fd < 0) {
135 perror("Failed to open device");
136 goto out;
137 }
138
139 rc = libevdev_new_from_fd(fd, &dev);
140 if (rc < 0) {
141 fprintf(stderr, "Failed to init libevdev (%s)\n", strerror(-rc));
142 goto out;
143 }
144
145 printf("Input device ID: bus %#x vendor %#x product %#x\n",
146 libevdev_get_id_bustype(dev),
147 libevdev_get_id_vendor(dev),
148 libevdev_get_id_product(dev));
149 printf("Evdev version: %x\n", libevdev_get_driver_version(dev));
150 printf("Input device name: \"%s\"\n", libevdev_get_name(dev));
151 printf("Phys location: %s\n", libevdev_get_phys(dev));
152 printf("Uniq identifier: %s\n", libevdev_get_uniq(dev));
153 print_bits(dev);
154 print_props(dev);
155
156 do {
157 struct input_event ev;
158 rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_NORMAL|LIBEVDEV_READ_FLAG_BLOCKING, &ev);
159 if (rc == LIBEVDEV_READ_STATUS_SYNC) {
160 printf("::::::::::::::::::::: dropped ::::::::::::::::::::::\n");
161 while (rc == LIBEVDEV_READ_STATUS_SYNC) {
162 print_sync_event(&ev);
163 rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_SYNC, &ev);
164 }
165 printf("::::::::::::::::::::: re-synced ::::::::::::::::::::::\n");
166 } else if (rc == LIBEVDEV_READ_STATUS_SUCCESS)
167 print_event(&ev);
168 } while (rc == LIBEVDEV_READ_STATUS_SYNC || rc == LIBEVDEV_READ_STATUS_SUCCESS || rc == -EAGAIN);
169
170 if (rc != LIBEVDEV_READ_STATUS_SUCCESS && rc != -EAGAIN)
171 fprintf(stderr, "Failed to handle events: %s\n", strerror(-rc));
172
173 rc = 0;
174 out:
175 libevdev_free(dev);
176
177 return rc;
178 }
179