1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
#include "tests.h"
#ifdef HAVE_LINUX_INPUT_H
# include <inttypes.h>
# include <stdio.h>
# include <stdlib.h>
# include <sys/ioctl.h>
# include <linux/input.h>
# include "print_fields.h"
static const char *errstr;
struct evdev_check {
unsigned long cmd;
const char *cmd_str;
void *arg_ptr;
void (*print_arg)(long rc, void *ptr, void *arg);
};
static long
invoke_test_syscall(unsigned long cmd, void *p)
{
long rc = ioctl(-1, cmd, p);
errstr = sprintrc(rc);
static char inj_errstr[4096];
snprintf(inj_errstr, sizeof(inj_errstr), "%s (INJECTED)", errstr);
errstr = inj_errstr;
return rc;
}
static void
test_evdev(struct evdev_check *check, void *arg)
{
long rc = invoke_test_syscall(check->cmd, check->arg_ptr);
printf("ioctl(-1, %s, ", check->cmd_str);
if (check->print_arg)
check->print_arg(rc, check->arg_ptr, arg);
else
printf("%p", check->arg_ptr);
printf(") = %s\n", errstr);
}
static void
print_input_absinfo(long rc, void *ptr, void *arg)
{
struct input_absinfo *absinfo = ptr;
if (rc < 0) {
printf("%p", absinfo);
return;
}
PRINT_FIELD_U("{", *absinfo, value);
PRINT_FIELD_U(", ", *absinfo, minimum);
# if VERBOSE
PRINT_FIELD_U(", ", *absinfo, maximum);
PRINT_FIELD_U(", ", *absinfo, fuzz);
PRINT_FIELD_U(", ", *absinfo, flat);
# ifdef HAVE_STRUCT_INPUT_ABSINFO_RESOLUTION
PRINT_FIELD_U(", ", *absinfo, resolution);
# endif
# else
printf(", ...");
# endif
printf("}");
}
static void
print_input_id(long rc, void *ptr, void *arg)
{
struct input_id *id = ptr;
if (rc < 0) {
printf("%p", id);
return;
}
printf("{ID_BUS=%" PRIu16
", ID_VENDOR=%" PRIu16
", ID_PRODUCT=%" PRIu16
", ID_VERSION=%" PRIu16 "}",
id->bustype, id->vendor, id->product, id->version);
}
# ifdef EVIOCGMTSLOTS
static void
print_mtslots(long rc, void *ptr, void *arg)
{
int *buffer = ptr;
const char **str = arg;
int num = atoi(*(str + 1));
if (rc < 0) {
printf("%p", buffer);
return;
}
printf("{code=%s", *str);
printf(", values=[");
for (unsigned int i = 1; i <= (unsigned) num; i++)
printf("%s%s", i > 1 ? ", " : "", *(str + i + 1));
printf("]}");
}
# endif
static void
print_getbit(long rc, void *ptr, void *arg)
{
const char **str = arg;
int num = atoi(*str);
if (rc < 0) {
printf("%p", ptr);
return;
}
printf("[");
printf("%s", *(str + 1));
for (unsigned int i = 2; i <= (unsigned) num; i++) {
# if ! VERBOSE
if (i > 4) {
printf(", ...");
break;
}
# endif
printf(", ");
printf("%s", *(str + i));
}
printf("]");
}
int
main(int argc, char **argv)
{
unsigned long num_skip;
long inject_retval;
bool locked = false;
if (argc == 1)
return 0;
if (argc < 3)
error_msg_and_fail("Usage: %s NUM_SKIP INJECT_RETVAL", argv[0]);
num_skip = strtoul(argv[1], NULL, 0);
inject_retval = strtol(argv[2], NULL, 0);
if (inject_retval < 0)
error_msg_and_fail("Expected non-negative INJECT_RETVAL, "
"but got %ld", inject_retval);
for (unsigned int i = 0; i < num_skip; i++) {
long rc = ioctl(-1, EVIOCGID, NULL);
printf("ioctl(-1, EVIOCGID, NULL) = %s%s\n",
sprintrc(rc),
rc == inject_retval ? " (INJECTED)" : "");
if (rc != inject_retval)
continue;
locked = true;
break;
}
if (!locked)
error_msg_and_fail("Hasn't locked on ioctl(-1"
", EVIOCGID, NULL) returning %lu",
inject_retval);
TAIL_ALLOC_OBJECT_CONST_PTR(struct input_id, id);
TAIL_ALLOC_OBJECT_CONST_PTR(struct input_absinfo, absinfo);
TAIL_ALLOC_OBJECT_CONST_PTR(int, bad_addr_slot);
# ifdef EVIOCGMTSLOTS
int mtslots[] = { ABS_MT_SLOT, 1, 3 };
/* we use the second element to indicate the number of values */
/* mtslots_str[1] is "2" so the number of values is 2 */
const char *mtslots_str[] = { "ABS_MT_SLOT", "2", "1", "3" };
/* invalid flag */
int invalid_mtslot[] = { -1, 1 };
char invalid_str[4096];
snprintf(invalid_str, sizeof(invalid_str), "%#x /* ABS_MT_??? */", invalid_mtslot[0]);
const char *invalid_mtslot_str[] = { invalid_str, "1", "1" };
# endif
/* set more than 4 bits */
unsigned long ev_more[] = { 1 << EV_ABS | 1 << EV_MSC | 1 << EV_LED | 1 << EV_SND | 1 << EV_PWR };
/* we use the first element to indicate the number of set bits */
/* ev_more_str[0] is "5" so the number of set bits is 5 */
const char *ev_more_str[] = { "5", "EV_ABS", "EV_MSC", "EV_LED", "EV_SND", "EV_PWR" };
/* set less than 4 bits */
unsigned long ev_less[] = { 1 << EV_ABS | 1 << EV_MSC | 1 << EV_LED };
const char *ev_less_str[] = { "3", "EV_ABS", "EV_MSC", "EV_LED" };
/* set zero bit */
unsigned long ev_zero[] = { 0x0 };
const char *ev_zero_str[] = { "0", " 0 " };
/* KEY_MAX is 0x2ff which is greater than retval * 8 */
unsigned long key[] = { 1 << KEY_1 | 1 << KEY_2, 0 };
const char *key_str[] = { "2", "KEY_1", "KEY_2" };
struct {
struct evdev_check check;
void *ptr;
} a[] = {
{ { ARG_STR(EVIOCGID), id, print_input_id }, NULL },
{ { ARG_STR(EVIOCGABS(ABS_X)), absinfo, print_input_absinfo }, NULL },
{ { ARG_STR(EVIOCGABS(ABS_Y)), absinfo, print_input_absinfo }, NULL },
{ { ARG_STR(EVIOCGABS(ABS_Y)), absinfo, print_input_absinfo }, NULL },
{ { ARG_STR(EVIOCGBIT(0, 0)), ev_more, print_getbit }, &ev_more_str },
{ { ARG_STR(EVIOCGBIT(0, 0)), ev_less, print_getbit }, &ev_less_str },
{ { ARG_STR(EVIOCGBIT(0, 0)), ev_zero, print_getbit }, &ev_zero_str },
{ { ARG_STR(EVIOCGBIT(EV_KEY, 0)), key, print_getbit }, &key_str},
# ifdef EVIOCGMTSLOTS
{ { ARG_STR(EVIOCGMTSLOTS(12)), mtslots, print_mtslots }, &mtslots_str },
{ { ARG_STR(EVIOCGMTSLOTS(8)), invalid_mtslot, print_mtslots }, &invalid_mtslot_str }
# endif
};
for (unsigned int i = 0; i < ARRAY_SIZE(a); i++) {
test_evdev(&a[i].check, a[i].ptr);
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_LINUX_INPUT_H")
#endif
|
