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