Coverage Report

Created: 2023-09-23 17:42

/libfido2/fuzz/udev.c
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Source (jump to first uncovered line)
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/*
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 * Copyright (c) 2021 Yubico AB. All rights reserved.
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 * Use of this source code is governed by a BSD-style
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 * license that can be found in the LICENSE file.
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 * SPDX-License-Identifier: BSD-2-Clause
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 */
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#include <sys/types.h>
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#include <linux/hidraw.h>
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#include <linux/input.h>
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#include <assert.h>
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#include <errno.h>
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#include <libudev.h>
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#include <stdlib.h>
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#include "mutator_aux.h"
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struct udev {
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        int magic;
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};
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struct udev_enumerate {
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        int magic;
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        struct udev_list_entry *list_entry;
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};
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struct udev_list_entry {
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        int magic;
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};
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struct udev_device {
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        int magic;
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        struct udev_device *parent;
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};
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38
551k
#define UDEV_MAGIC              0x584492cc
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1.63M
#define UDEV_DEVICE_MAGIC       0x569180dd
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2.34k
#define UDEV_LIST_ENTRY_MAGIC   0x497422ee
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2.36k
#define UDEV_ENUM_MAGIC         0x583570ff
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7.01M
#define ASSERT_TYPE(x, m)               assert((x) != NULL && (x)->magic == (m))
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2.14M
#define ASSERT_UDEV(x)                  ASSERT_TYPE((x), UDEV_MAGIC)
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9.42k
#define ASSERT_UDEV_ENUM(x)             ASSERT_TYPE((x), UDEV_ENUM_MAGIC)
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2.09M
#define ASSERT_UDEV_LIST_ENTRY(x)       ASSERT_TYPE((x), UDEV_LIST_ENTRY_MAGIC)
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2.76M
#define ASSERT_UDEV_DEVICE(x)           ASSERT_TYPE((x), UDEV_DEVICE_MAGIC)
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static const char *uevent;
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static const struct blob *report_descriptor;
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struct udev *__wrap_udev_new(void);
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struct udev_device *__wrap_udev_device_get_parent_with_subsystem_devtype(
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    struct udev_device *, const char *, const char *);
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struct udev_device *__wrap_udev_device_new_from_syspath(struct udev *,
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    const char *);
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struct udev_enumerate *__wrap_udev_enumerate_new(struct udev *);
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struct udev_list_entry *__wrap_udev_enumerate_get_list_entry(
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    struct udev_enumerate *);
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struct udev_list_entry *__wrap_udev_list_entry_get_next(
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    struct udev_list_entry *);
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const char *__wrap_udev_device_get_sysattr_value(struct udev_device *,
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    const char *);
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const char *__wrap_udev_list_entry_get_name(struct udev_list_entry *);
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const char *__wrap_udev_device_get_devnode(struct udev_device *);
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const char *__wrap_udev_device_get_sysnum(struct udev_device *);
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int __wrap_udev_enumerate_add_match_subsystem(struct udev_enumerate *,
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    const char *);
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int __wrap_udev_enumerate_scan_devices(struct udev_enumerate *);
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int __wrap_ioctl(int, unsigned long , ...);
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void __wrap_udev_device_unref(struct udev_device *);
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void __wrap_udev_enumerate_unref(struct udev_enumerate *);
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void __wrap_udev_unref(struct udev *);
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void set_udev_parameters(const char *, const struct blob *);
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struct udev_device *
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__wrap_udev_device_get_parent_with_subsystem_devtype(struct udev_device *child,
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    const char *subsystem, const char *devtype)
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48.1k
{
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48.1k
        ASSERT_UDEV_DEVICE(child);
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0
        fido_log_debug("%s", subsystem); /* XXX consume */
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48.1k
        fido_log_debug("%s", devtype); /* XXX consume */
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48.1k
        if (child->parent != NULL)
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2.89k
                return child->parent;
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45.2k
        if ((child->parent = calloc(1, sizeof(*child->parent))) == NULL)
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113
                return NULL;
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45.1k
        child->parent->magic = UDEV_DEVICE_MAGIC;
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45.1k
        return child->parent;
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45.2k
}
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const char *
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__wrap_udev_device_get_sysattr_value(struct udev_device *udev_device,
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    const char *sysattr)
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48.0k
{
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48.0k
        ASSERT_UDEV_DEVICE(udev_device);
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48.0k
        if (uniform_random(400) < 1)
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141
                return NULL;
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47.9k
        if (!strcmp(sysattr, "manufacturer") || !strcmp(sysattr, "product"))
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2.87k
                return "product info"; /* XXX randomise? */
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45.0k
        else if (!strcmp(sysattr, "uevent"))
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45.0k
                return uevent;
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0
        return NULL;
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47.9k
}
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const char *
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__wrap_udev_list_entry_get_name(struct udev_list_entry *entry)
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1.04M
{
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1.04M
        ASSERT_UDEV_LIST_ENTRY(entry);
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1.04M
        return uniform_random(400) < 1 ? NULL : "name"; /* XXX randomise? */
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1.04M
}
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struct udev_device *
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__wrap_udev_device_new_from_syspath(struct udev *udev, const char *syspath)
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1.59M
{
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1.59M
        struct udev_device *udev_device;
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1.59M
        ASSERT_UDEV(udev);
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0
        fido_log_debug("%s", syspath);
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1.59M
        if ((udev_device = calloc(1, sizeof(*udev_device))) == NULL)
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3.87k
                return NULL;
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1.58M
        udev_device->magic = UDEV_DEVICE_MAGIC;
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1.58M
        return udev_device;
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1.59M
}
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const char *
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__wrap_udev_device_get_devnode(struct udev_device *udev_device)
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487k
{
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487k
        ASSERT_UDEV_DEVICE(udev_device);
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487k
        return uniform_random(400) < 1 ? NULL : "/dev/zero";
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487k
}
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const char *
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__wrap_udev_device_get_sysnum(struct udev_device *udev_device)
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547k
{
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547k
        ASSERT_UDEV_DEVICE(udev_device);
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547k
        return uniform_random(400) < 1 ? NULL : "101010"; /* XXX randomise? */
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547k
}
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void
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__wrap_udev_device_unref(struct udev_device *udev_device)
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1.58M
{
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1.58M
        ASSERT_UDEV_DEVICE(udev_device);
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1.58M
        if (udev_device->parent) {
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45.1k
                ASSERT_UDEV_DEVICE(udev_device->parent);
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0
                free(udev_device->parent);
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45.1k
        }
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0
        free(udev_device);
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1.58M
}
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struct udev *
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__wrap_udev_new(void)
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552k
{
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552k
        struct udev *udev;
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158
552k
        if ((udev = calloc(1, sizeof(*udev))) == NULL)
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1.42k
                return NULL;
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551k
        udev->magic = UDEV_MAGIC;
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162
551k
        return udev;
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552k
}
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struct udev_enumerate *
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__wrap_udev_enumerate_new(struct udev *udev)
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2.36k
{
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2.36k
        struct udev_enumerate *udev_enum;
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2.36k
        ASSERT_UDEV(udev);
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2.36k
        if ((udev_enum = calloc(1, sizeof(*udev_enum))) == NULL)
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7
                return NULL;
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2.36k
        udev_enum->magic = UDEV_ENUM_MAGIC;
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2.36k
        return udev_enum;
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2.36k
}
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178
int
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__wrap_udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enum,
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    const char *subsystem)
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2.36k
{
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2.36k
        ASSERT_UDEV_ENUM(udev_enum);
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0
        fido_log_debug("%s:", subsystem);
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2.36k
        return uniform_random(400) < 1 ? -EINVAL : 0;
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2.36k
}
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187
int
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__wrap_udev_enumerate_scan_devices(struct udev_enumerate *udev_enum)
189
2.35k
{
190
2.35k
        ASSERT_UDEV_ENUM(udev_enum);
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2.35k
        return uniform_random(400) < 1 ? -EINVAL : 0;
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2.35k
}
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struct udev_list_entry *
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__wrap_udev_enumerate_get_list_entry(struct udev_enumerate *udev_enum)
196
2.34k
{
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2.34k
        ASSERT_UDEV_ENUM(udev_enum);
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2.34k
        if ((udev_enum->list_entry = calloc(1,
199
2.34k
            sizeof(*udev_enum->list_entry))) == NULL)
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4
                return NULL;
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2.34k
        udev_enum->list_entry->magic = UDEV_LIST_ENTRY_MAGIC;
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203
2.34k
        return udev_enum->list_entry;
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2.34k
}
205
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struct udev_list_entry *
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__wrap_udev_list_entry_get_next(struct udev_list_entry *udev_list_entry)
208
1.04M
{
209
1.04M
        ASSERT_UDEV_LIST_ENTRY(udev_list_entry);
210
1.04M
        return uniform_random(400) < 1 ? NULL : udev_list_entry;
211
1.04M
}
212
213
void
214
__wrap_udev_enumerate_unref(struct udev_enumerate *udev_enum)
215
2.36k
{
216
2.36k
        ASSERT_UDEV_ENUM(udev_enum);
217
2.36k
        if (udev_enum->list_entry)
218
2.36k
                ASSERT_UDEV_LIST_ENTRY(udev_enum->list_entry);
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0
        free(udev_enum->list_entry);
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2.36k
        free(udev_enum);
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2.36k
}
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223
void
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__wrap_udev_unref(struct udev *udev)
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551k
{
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551k
        ASSERT_UDEV(udev);
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0
        free(udev);
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551k
}
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230
int
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__wrap_ioctl(int fd, unsigned long request, ...)
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968k
{
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968k
        va_list ap;
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968k
        struct hidraw_report_descriptor *hrd;
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236
968k
        (void)fd;
237
238
968k
        if (uniform_random(400) < 1) {
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2.41k
                errno = EINVAL;
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2.41k
                return -1;
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2.41k
        }
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965k
        va_start(ap, request);
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245
965k
        switch (IOCTL_REQ(request)) {
246
483k
        case IOCTL_REQ(HIDIOCGRDESCSIZE):
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483k
                *va_arg(ap, int *) = (int)report_descriptor->len;
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483k
                break;
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482k
        case IOCTL_REQ(HIDIOCGRDESC):
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482k
                hrd = va_arg(ap, struct hidraw_report_descriptor *);
251
482k
                assert(hrd->size == report_descriptor->len);
252
0
                memcpy(hrd->value, report_descriptor->body, hrd->size);
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482k
                break;
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0
        default:
255
0
                warnx("%s: unknown request 0x%lx", __func__, request);
256
0
                abort();
257
965k
        }
258
259
965k
        va_end(ap);
260
261
965k
        return 0;
262
965k
}
263
264
void
265
set_udev_parameters(const char *uevent_ptr,
266
    const struct blob *report_descriptor_ptr)
267
1.21k
{
268
1.21k
        uevent = uevent_ptr;
269
1.21k
        report_descriptor = report_descriptor_ptr;
270
1.21k
}