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
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/***
Copyright © 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
***/
#include <errno.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/signalfd.h>
#include <unistd.h>
#include "device-private.h"
#include "fs-util.h"
#include "log.h"
#include "main-func.h"
#include "mkdir-label.h"
#include "mount-util.h"
#include "namespace-util.h"
#include "selinux-util.h"
#include "signal-util.h"
#include "string-util.h"
#include "tests.h"
#include "udev-event.h"
#include "version.h"
static int device_new_from_synthetic_event(sd_device **ret, const char *syspath, const char *action) {
_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
sd_device_action_t a;
int r;
assert(ret);
assert(syspath);
assert(action);
a = device_action_from_string(action);
if (a < 0)
return a;
r = sd_device_new_from_syspath(&dev, syspath);
if (r < 0)
return r;
r = device_read_uevent_file(dev);
if (r < 0)
return r;
r = device_set_action(dev, a);
if (r < 0)
return r;
*ret = TAKE_PTR(dev);
return 0;
}
static int fake_filesystems(void) {
static const struct fakefs {
const char *src;
const char *target;
const char *error;
bool ignore_mount_error;
} fakefss[] = {
{ "test/tmpfs/sys", "/sys", "Failed to mount test /sys", false },
{ "test/tmpfs/dev", "/dev", "Failed to mount test /dev", false },
{ "test/run", "/run", "Failed to mount test /run", false },
{ "test/run", "/etc/udev/rules.d", "Failed to mount empty /etc/udev/rules.d", true },
{ "test/run", UDEVLIBEXECDIR "/rules.d", "Failed to mount empty " UDEVLIBEXECDIR "/rules.d", true },
};
int r;
r = detach_mount_namespace();
if (r < 0)
return log_error_errno(r, "Failed to detach mount namespace: %m");
for (size_t i = 0; i < ELEMENTSOF(fakefss); i++) {
r = mount_nofollow_verbose(fakefss[i].ignore_mount_error ? LOG_NOTICE : LOG_ERR,
fakefss[i].src, fakefss[i].target, NULL, MS_BIND, NULL);
if (r < 0 && !fakefss[i].ignore_mount_error)
return r;
}
return 0;
}
static int run(int argc, char *argv[]) {
_cleanup_(udev_rules_freep) UdevRules *rules = NULL;
_cleanup_(udev_event_freep) UdevEvent *event = NULL;
_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
const char *devpath, *devname, *action;
int r;
test_setup_logging(LOG_INFO);
if (!IN_SET(argc, 2, 3))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"This program needs one or two arguments, %d given", argc - 1);
r = fake_filesystems();
if (r < 0)
return r;
/* Let's make sure the test runs with selinux assumed disabled. */
#if HAVE_SELINUX
fini_selinuxmnt();
#endif
mac_selinux_retest();
if (argc == 2) {
if (!streq(argv[1], "check"))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unknown argument: %s", argv[1]);
return 0;
}
log_debug("version %s", GIT_VERSION);
r = mac_selinux_init();
if (r < 0)
return r;
action = argv[1];
devpath = argv[2];
assert_se(udev_rules_load(&rules, RESOLVE_NAME_EARLY) == 0);
const char *syspath;
syspath = strjoina("/sys", devpath);
r = device_new_from_synthetic_event(&dev, syspath, action);
if (r < 0)
return log_debug_errno(r, "Failed to open device '%s'", devpath);
assert_se(event = udev_event_new(dev, 0, NULL, log_get_max_level()));
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0);
/* do what devtmpfs usually provides us */
if (sd_device_get_devname(dev, &devname) >= 0) {
const char *subsystem;
mode_t mode = 0600;
if (sd_device_get_subsystem(dev, &subsystem) >= 0 && streq(subsystem, "block"))
mode |= S_IFBLK;
else
mode |= S_IFCHR;
if (!streq(action, "remove")) {
dev_t devnum = makedev(0, 0);
(void) mkdir_parents_label(devname, 0755);
(void) sd_device_get_devnum(dev, &devnum);
if (mknod(devname, mode, devnum) < 0)
return log_error_errno(errno, "mknod() failed for '%s': %m", devname);
} else {
if (unlink(devname) < 0)
return log_error_errno(errno, "unlink('%s') failed: %m", devname);
(void) rmdir_parents(devname, "/dev");
}
}
udev_event_execute_rules(event, -1, 3 * USEC_PER_SEC, SIGKILL, NULL, rules);
udev_event_execute_run(event, 3 * USEC_PER_SEC, SIGKILL);
return 0;
}
DEFINE_MAIN_FUNCTION(run);
|
