chiark / gitweb /
df1409bff64cdcb2c8a2f40e19b2036aecdb7b1e
[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 <syslog.h>
29 #include <getopt.h>
30 #include <sys/signalfd.h>
31
32 #include "udev.h"
33
34 static int adm_test(struct udev *udev, int argc, char *argv[])
35 {
36         int resolve_names = 1;
37         char filename[UTIL_PATH_SIZE];
38         const char *action = "add";
39         const char *syspath = NULL;
40         struct udev_event *event = NULL;
41         struct udev_device *dev = NULL;
42         struct udev_rules *rules = NULL;
43         struct udev_list_entry *entry;
44         sigset_t mask, sigmask_orig;
45         int err;
46         int rc = 0;
47
48         static const struct option options[] = {
49                 { "action", required_argument, NULL, 'a' },
50                 { "resolve-names", required_argument, NULL, 'N' },
51                 { "help", no_argument, NULL, 'h' },
52                 {}
53         };
54
55         log_debug("version %s\n", VERSION);
56
57         for (;;) {
58                 int option;
59
60                 option = getopt_long(argc, argv, "a:s:N:fh", options, NULL);
61                 if (option == -1)
62                         break;
63
64                 switch (option) {
65                 case 'a':
66                         action = optarg;
67                         break;
68                 case 'N':
69                         if (streq (optarg, "early")) {
70                                 resolve_names = 1;
71                         } else if (streq (optarg, "late")) {
72                                 resolve_names = 0;
73                         } else if (streq (optarg, "never")) {
74                                 resolve_names = -1;
75                         } else {
76                                 fprintf(stderr, "resolve-names must be early, late or never\n");
77                                 log_error("resolve-names must be early, late or never\n");
78                                 exit(EXIT_FAILURE);
79                         }
80                         break;
81                 case 'h':
82                         printf("Usage: udevadm test OPTIONS <syspath>\n"
83                                "  --action=<string>     set action string\n"
84                                "  --help\n\n");
85                         exit(EXIT_SUCCESS);
86                 default:
87                         exit(EXIT_FAILURE);
88                 }
89         }
90         syspath = argv[optind];
91
92         if (syspath == NULL) {
93                 fprintf(stderr, "syspath parameter missing\n");
94                 rc = 2;
95                 goto out;
96         }
97
98         printf("This program is for debugging only, it does not run any program\n"
99                "specified by a RUN key. It may show incorrect results, because\n"
100                "some values may be different, or not available at a simulation run.\n"
101                "\n");
102
103         sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
104
105         udev_builtin_init(udev);
106
107         rules = udev_rules_new(udev, resolve_names);
108         if (rules == NULL) {
109                 fprintf(stderr, "error reading rules\n");
110                 rc = 3;
111                 goto out;
112         }
113
114         /* add /sys if needed */
115         if (!startswith(syspath, "/sys"))
116                 strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
117         else
118                 strscpy(filename, sizeof(filename), syspath);
119         util_remove_trailing_chars(filename, '/');
120
121         dev = udev_device_new_from_syspath(udev, filename);
122         if (dev == NULL) {
123                 fprintf(stderr, "unable to open device '%s'\n", filename);
124                 rc = 4;
125                 goto out;
126         }
127
128         /* skip reading of db, but read kernel parameters */
129         udev_device_set_info_loaded(dev);
130         udev_device_read_uevent_file(dev);
131
132         udev_device_set_action(dev, action);
133         event = udev_event_new(dev);
134
135         sigfillset(&mask);
136         sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
137         event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
138         if (event->fd_signal < 0) {
139                 fprintf(stderr, "error creating signalfd\n");
140                 rc = 5;
141                 goto out;
142         }
143
144         err = udev_event_execute_rules(event, rules, &sigmask_orig);
145
146         udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev))
147                 printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
148
149         if (err == 0) {
150                 udev_list_entry_foreach(entry, udev_list_get_entry(&event->run_list)) {
151                         char program[UTIL_PATH_SIZE];
152
153                         udev_event_apply_format(event, udev_list_entry_get_name(entry), program, sizeof(program));
154                         printf("run: '%s'\n", program);
155                 }
156         }
157 out:
158         if (event != NULL && event->fd_signal >= 0)
159                 close(event->fd_signal);
160         udev_event_unref(event);
161         udev_device_unref(dev);
162         udev_rules_unref(rules);
163         udev_builtin_exit(udev);
164         return rc;
165 }
166
167 const struct udevadm_cmd udevadm_test = {
168         .name = "test",
169         .cmd = adm_test,
170         .help = "test an event run",
171         .debug = true,
172 };