1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2015 Cedric Hnyda <chnyda@suse.com>
4 * Copyright (c) 2019 Cyril Hrubis <chrubis@suse.cz>
5 */
6
7 #include <linux/input.h>
8 #include <linux/uinput.h>
9 #include <stdio.h>
10 #include <string.h>
11
12 #define TST_NO_DEFAULT_MAIN
13 #include "tst_test.h"
14
15 #include "tst_uinput.h"
16
17 #define VIRTUAL_DEVICE "virtual-device-ltp"
18
19 static const char *uinput_paths[] = {
20 "/dev/input/uinput",
21 "/dev/uinput",
22 };
23
open_uinput(void)24 int open_uinput(void)
25 {
26 unsigned int i;
27 int fd;
28
29 for (i = 0; i < ARRAY_SIZE(uinput_paths); i++) {
30 fd = open(uinput_paths[i], O_WRONLY | O_NONBLOCK);
31
32 if (fd > 0) {
33 tst_res(TINFO, "Found uinput dev at %s", uinput_paths[i]);
34 return fd;
35 }
36
37 if (fd < 0 && errno != ENOENT) {
38 tst_brk(TBROK | TERRNO, "open(%s)", uinput_paths[i]);
39 }
40 }
41
42 return -1;
43 }
44
45
46 #define SYSFS_PREFIX "Sysfs="
47 #define HANDLERS_PREFIX "Handlers="
48
parse_field(char * line,char field)49 static char *parse_field(char *line, char field)
50 {
51 char *value;
52
53 switch (field) {
54 case 'H':
55 value = strstr(line, HANDLERS_PREFIX) + sizeof(HANDLERS_PREFIX) - 1;
56 break;
57 case 'S':
58 value = strstr(line, SYSFS_PREFIX) + sizeof(SYSFS_PREFIX) - 1;
59 break;
60 default:
61 return NULL;
62 }
63
64 value[strlen(value) - 1] = 0;
65
66 return strdup(value);
67 }
68
get_input_field_value(char field)69 char *get_input_field_value(char field)
70 {
71 FILE *file;
72 char line[1024];
73 int flag = 0;
74
75 file = fopen("/proc/bus/input/devices", "r");
76 if (!file)
77 return NULL;
78
79 while (fgets(line, sizeof(line), file)) {
80 if (strstr(line, "N: Name=\""VIRTUAL_DEVICE"\""))
81 flag = 1;
82
83 if (flag) {
84 if (line[0] == field)
85 return parse_field(line, field);
86
87 if (line[0] == '\n')
88 flag = 0;
89 }
90 }
91
92 fclose(file);
93 return NULL;
94 }
95
check_device(void)96 static int check_device(void)
97 {
98 FILE *file;
99 char line[256];
100
101 file = fopen("/proc/bus/input/devices", "r");
102 if (!file)
103 return 0;
104
105 while (fgets(line, sizeof(line), file)) {
106 if (strstr(line, "Name=\""VIRTUAL_DEVICE"\""))
107 return 1;
108 }
109
110 fclose(file);
111
112 return 0;
113 }
114
setup_mouse_events(int fd)115 void setup_mouse_events(int fd)
116 {
117 SAFE_IOCTL(fd, UI_SET_EVBIT, EV_KEY);
118 SAFE_IOCTL(fd, UI_SET_KEYBIT, BTN_LEFT);
119 SAFE_IOCTL(fd, UI_SET_EVBIT, EV_REL);
120 SAFE_IOCTL(fd, UI_SET_RELBIT, REL_X);
121 SAFE_IOCTL(fd, UI_SET_RELBIT, REL_Y);
122 }
123
destroy_input_device(int fd)124 void destroy_input_device(int fd)
125 {
126 SAFE_IOCTL(fd, UI_DEV_DESTROY, NULL);
127 SAFE_CLOSE(fd);
128 }
129
create_input_device(int fd)130 void create_input_device(int fd)
131 {
132 int nb;
133 struct uinput_user_dev uidev = {
134 .name = VIRTUAL_DEVICE,
135 .id = {
136 .bustype = BUS_USB,
137 .vendor = 0x1,
138 .product = 0x1,
139 .version = 1,
140 }
141 };
142
143 SAFE_WRITE(1, fd, &uidev, sizeof(uidev));
144 SAFE_IOCTL(fd, UI_DEV_CREATE, NULL);
145
146 for (nb = 100; nb > 0; nb--) {
147 if (check_device())
148 return;
149 usleep(10000);
150 }
151
152 destroy_input_device(fd);
153 tst_brk(TBROK, "Failed to create device");
154 }
155