chiark / gitweb /
udev-builtin-blkid: modernizations and minor fixes
[elogind.git] / src / udev / udevadm.c
1 /*
2  * Copyright (C) 2007-2012 Kay Sievers <kay@vrfy.org>
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17
18 #include <unistd.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <stddef.h>
22 #include <string.h>
23 #include <errno.h>
24 #include <getopt.h>
25
26 #include "udev.h"
27
28 void udev_main_log(struct udev *udev, int priority,
29                    const char *file, int line, const char *fn,
30                    const char *format, va_list args)
31 {
32         log_metav(priority, file, line, fn, format, args);
33 }
34
35 static int adm_version(struct udev *udev, int argc, char *argv[])
36 {
37         printf("%s\n", VERSION);
38         return 0;
39 }
40
41 static const struct udevadm_cmd udevadm_version = {
42         .name = "version",
43         .cmd = adm_version,
44 };
45
46 static int adm_help(struct udev *udev, int argc, char *argv[]);
47
48 static const struct udevadm_cmd udevadm_help = {
49         .name = "help",
50         .cmd = adm_help,
51 };
52
53 static const struct udevadm_cmd *udevadm_cmds[] = {
54         &udevadm_info,
55         &udevadm_trigger,
56         &udevadm_settle,
57         &udevadm_control,
58         &udevadm_monitor,
59         &udevadm_hwdb,
60         &udevadm_test,
61         &udevadm_test_builtin,
62         &udevadm_version,
63         &udevadm_help,
64 };
65
66 static int adm_help(struct udev *udev, int argc, char *argv[])
67 {
68         unsigned int i;
69
70         fprintf(stderr, "Usage: udevadm [--help] [--version] [--debug] COMMAND [COMMAND OPTIONS]\n");
71         for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++)
72                 if (udevadm_cmds[i]->help != NULL)
73                         printf("  %-12s %s\n", udevadm_cmds[i]->name, udevadm_cmds[i]->help);
74         fprintf(stderr, "\n");
75         return 0;
76 }
77
78 static int run_command(struct udev *udev, const struct udevadm_cmd *cmd, int argc, char *argv[])
79 {
80         if (cmd->debug)
81                 log_set_max_level(LOG_DEBUG);
82         log_debug("calling: %s", cmd->name);
83         return cmd->cmd(udev, argc, argv);
84 }
85
86 int main(int argc, char *argv[])
87 {
88         struct udev *udev;
89         static const struct option options[] = {
90                 { "debug", no_argument, NULL, 'd' },
91                 { "help", no_argument, NULL, 'h' },
92                 { "version", no_argument, NULL, 'V' },
93                 {}
94         };
95         const char *command;
96         unsigned int i;
97         int rc = 1;
98
99         udev = udev_new();
100         if (udev == NULL)
101                 goto out;
102
103         log_parse_environment();
104         log_open();
105         udev_set_log_fn(udev, udev_main_log);
106         label_init("/dev");
107
108         for (;;) {
109                 int option;
110
111                 option = getopt_long(argc, argv, "+dhV", options, NULL);
112                 if (option == -1)
113                         break;
114
115                 switch (option) {
116                 case 'd':
117                         log_set_max_level(LOG_DEBUG);
118                         udev_set_log_priority(udev, LOG_DEBUG);
119                         break;
120                 case 'h':
121                         rc = adm_help(udev, argc, argv);
122                         goto out;
123                 case 'V':
124                         rc = adm_version(udev, argc, argv);
125                         goto out;
126                 default:
127                         goto out;
128                 }
129         }
130         command = argv[optind];
131
132         if (command != NULL)
133                 for (i = 0; i < ELEMENTSOF(udevadm_cmds); i++) {
134                         if (streq(udevadm_cmds[i]->name, command)) {
135                                 argc -= optind;
136                                 argv += optind;
137                                 /* we need '0' here to reset the internal state */
138                                 optind = 0;
139                                 rc = run_command(udev, udevadm_cmds[i], argc, argv);
140                                 goto out;
141                         }
142                 }
143
144         fprintf(stderr, "missing or unknown command\n\n");
145         adm_help(udev, argc, argv);
146         rc = 2;
147 out:
148         label_finish();
149         udev_unref(udev);
150         log_close();
151         return rc;
152 }