summaryrefslogtreecommitdiffstats
path: root/src/udev/udevadm-test.c
blob: a029622af9dab240491dbb1beb9badb1e4ec6094 (plain)
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
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright © 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
 */

#include <errno.h>
#include <getopt.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/signalfd.h>
#include <unistd.h>

#include "sd-device.h"

#include "device-private.h"
#include "device-util.h"
#include "libudev-util.h"
#include "path-util.h"
#include "string-util.h"
#include "strxcpyx.h"
#include "udev-builtin.h"
#include "udev-event.h"
#include "udevadm.h"

static const char *arg_action = "add";
static ResolveNameTiming arg_resolve_name_timing = RESOLVE_NAME_EARLY;
static char arg_syspath[UTIL_PATH_SIZE] = {};

static int help(void) {

        printf("%s test [OPTIONS] DEVPATH\n\n"
               "Test an event run.\n\n"
               "  -h --help                            Show this help\n"
               "  -V --version                         Show package version\n"
               "  -a --action=ACTION|help              Set action string\n"
               "  -N --resolve-names=early|late|never  When to resolve names\n"
               , program_invocation_short_name);

        return 0;
}

static int parse_argv(int argc, char *argv[]) {
        static const struct option options[] = {
                { "action",        required_argument, NULL, 'a' },
                { "resolve-names", required_argument, NULL, 'N' },
                { "version",       no_argument,       NULL, 'V' },
                { "help",          no_argument,       NULL, 'h' },
                {}
        };

        int c;

        while ((c = getopt_long(argc, argv, "a:N:Vh", options, NULL)) >= 0)
                switch (c) {
                case 'a': {
                        DeviceAction a;

                        if (streq(optarg, "help")) {
                                dump_device_action_table();
                                return 0;
                        }

                        a = device_action_from_string(optarg);
                        if (a < 0)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Invalid action '%s'", optarg);

                        arg_action = optarg;
                        break;
                }
                case 'N':
                        arg_resolve_name_timing = resolve_name_timing_from_string(optarg);
                        if (arg_resolve_name_timing < 0)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "--resolve-names= must be early, late or never");
                        break;
                case 'V':
                        return print_version();
                case 'h':
                        return help();
                case '?':
                        return -EINVAL;
                default:
                        assert_not_reached("Unknown option");
                }

        if (!argv[optind])
                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                       "syspath parameter missing.");

        /* add /sys if needed */
        if (!path_startswith(argv[optind], "/sys"))
                strscpyl(arg_syspath, sizeof(arg_syspath), "/sys", argv[optind], NULL);
        else
                strscpy(arg_syspath, sizeof(arg_syspath), argv[optind]);

        return 1;
}

int test_main(int argc, char *argv[], void *userdata) {
        _cleanup_(udev_rules_freep) UdevRules *rules = NULL;
        _cleanup_(udev_event_freep) UdevEvent *event = NULL;
        _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
        const char *cmd, *key, *value;
        sigset_t mask, sigmask_orig;
        void *val;
        int r;

        log_set_max_level(LOG_DEBUG);

        r = parse_argv(argc, argv);
        if (r <= 0)
                return r;

        printf("This program is for debugging only, it does not run any program\n"
               "specified by a RUN key. It may show incorrect results, because\n"
               "some values may be different, or not available at a simulation run.\n"
               "\n");

        assert_se(sigprocmask(SIG_SETMASK, NULL, &sigmask_orig) >= 0);

        udev_builtin_init();

        r = udev_rules_load(&rules, arg_resolve_name_timing);
        if (r < 0) {
                log_error_errno(r, "Failed to read udev rules: %m");
                goto out;
        }

        r = device_new_from_synthetic_event(&dev, arg_syspath, arg_action);
        if (r < 0) {
                log_error_errno(r, "Failed to open device '%s': %m", arg_syspath);
                goto out;
        }

        /* don't read info from the db */
        device_seal(dev);

        event = udev_event_new(dev, 0, NULL);

        assert_se(sigfillset(&mask) >= 0);
        assert_se(sigprocmask(SIG_SETMASK, &mask, &sigmask_orig) >= 0);

        udev_event_execute_rules(event, 60 * USEC_PER_SEC, SIGKILL, NULL, rules);

        FOREACH_DEVICE_PROPERTY(dev, key, value)
                printf("%s=%s\n", key, value);

        ORDERED_HASHMAP_FOREACH_KEY(val, cmd, event->run_list) {
                char program[UTIL_PATH_SIZE];

                (void) udev_event_apply_format(event, cmd, program, sizeof(program), false);
                printf("run: '%s'\n", program);
        }

        r = 0;
out:
        udev_builtin_exit();
        return r;
}