chiark / gitweb /
firstboot: silence a warning
[elogind.git] / src / udev / udevadm-test.c
1 /*
2  * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
3  * Copyright (C) 2004-2008 Kay Sievers <kay@vrfy.org>
4  *
5  * This program is free software: you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation, either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
17  */
18
19 #include <stdlib.h>
20 #include <string.h>
21 #include <stdio.h>
22 #include <stddef.h>
23 #include <unistd.h>
24 #include <errno.h>
25 #include <ctype.h>
26 #include <fcntl.h>
27 #include <signal.h>
28 #include <getopt.h>
29 #include <sys/signalfd.h>
30
31 #include "udev.h"
32 #include "udev-util.h"
33
34 static int adm_test(struct udev *udev, int argc, char *argv[]) {
35         int resolve_names = 1;
36         char filename[UTIL_PATH_SIZE];
37         const char *action = "add";
38         const char *syspath = NULL;
39         struct udev_list_entry *entry;
40         _cleanup_udev_rules_unref_ struct udev_rules *rules = NULL;
41         _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
42         _cleanup_udev_event_unref_ struct udev_event *event = NULL;
43         sigset_t mask, sigmask_orig;
44         int rc = 0, c;
45
46         static const struct option options[] = {
47                 { "action", required_argument, NULL, 'a' },
48                 { "resolve-names", required_argument, NULL, 'N' },
49                 { "help", no_argument, NULL, 'h' },
50                 {}
51         };
52
53         log_debug("version %s", VERSION);
54
55         while((c = getopt_long(argc, argv, "a:N:h", options, NULL)) >= 0)
56                 switch (c) {
57                 case 'a':
58                         action = optarg;
59                         break;
60                 case 'N':
61                         if (streq (optarg, "early")) {
62                                 resolve_names = 1;
63                         } else if (streq (optarg, "late")) {
64                                 resolve_names = 0;
65                         } else if (streq (optarg, "never")) {
66                                 resolve_names = -1;
67                         } else {
68                                 fprintf(stderr, "resolve-names must be early, late or never\n");
69                                 log_error("resolve-names must be early, late or never");
70                                 exit(EXIT_FAILURE);
71                         }
72                         break;
73                 case 'h':
74                         printf("Usage: udevadm test OPTIONS <syspath>\n"
75                                "  -a,--action=ACTION                  set action string\n"
76                                "  -N,--resolve-names=early|late|never when to resolve names\n"
77                                "  -h,--help                           print this help string\n"
78                                "\n");
79                         exit(EXIT_SUCCESS);
80                 case '?':
81                         exit(EXIT_FAILURE);
82                 default:
83                         assert_not_reached("Unknown option");
84                 }
85
86         syspath = argv[optind];
87         if (syspath == NULL) {
88                 fprintf(stderr, "syspath parameter missing\n");
89                 rc = 2;
90                 goto out;
91         }
92
93         printf("This program is for debugging only, it does not run any program\n"
94                "specified by a RUN key. It may show incorrect results, because\n"
95                "some values may be different, or not available at a simulation run.\n"
96                "\n");
97
98         sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
99
100         udev_builtin_init(udev);
101
102         rules = udev_rules_new(udev, resolve_names);
103         if (rules == NULL) {
104                 fprintf(stderr, "error reading rules\n");
105                 rc = 3;
106                 goto out;
107         }
108
109         /* add /sys if needed */
110         if (!startswith(syspath, "/sys"))
111                 strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
112         else
113                 strscpy(filename, sizeof(filename), syspath);
114         util_remove_trailing_chars(filename, '/');
115
116         dev = udev_device_new_from_syspath(udev, filename);
117         if (dev == NULL) {
118                 fprintf(stderr, "unable to open device '%s'\n", filename);
119                 rc = 4;
120                 goto out;
121         }
122
123         /* skip reading of db, but read kernel parameters */
124         udev_device_set_info_loaded(dev);
125         udev_device_read_uevent_file(dev);
126
127         udev_device_set_action(dev, action);
128         event = udev_event_new(dev);
129
130         sigfillset(&mask);
131         sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
132         event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
133         if (event->fd_signal < 0) {
134                 fprintf(stderr, "error creating signalfd\n");
135                 rc = 5;
136                 goto out;
137         }
138
139         udev_event_execute_rules(event, 60 * USEC_PER_SEC, rules, &sigmask_orig);
140
141         udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
142                 printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
143
144         udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
145                 char program[UTIL_PATH_SIZE];
146
147                 udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program));
148                 printf("run: '%s'\n", program);
149         }
150 out:
151         if (event != NULL && event->fd_signal >= 0)
152                 close(event->fd_signal);
153         udev_builtin_exit(udev);
154         return rc;
155 }
156
157 const struct udevadm_cmd udevadm_test = {
158         .name = "test",
159         .cmd = adm_test,
160         .help = "test an event run",
161         .debug = true,
162 };