1/*
2 * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
3 * Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
4 *
5 *	This program is free software; you can redistribute it and/or modify it
6 *	under the terms of the GNU General Public License as published by the
7 *	Free Software Foundation version 2 of the License.
8 *
9 *	This program is distributed in the hope that it will be useful, but
10 *	WITHOUT ANY WARRANTY; without even the implied warranty of
11 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 *	General Public License for more details.
13 *
14 *	You should have received a copy of the GNU General Public License along
15 *	with this program; if not, write to the Free Software Foundation, Inc.,
16 *	51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
17 *
18 */
19
20#include <stdlib.h>
21#include <string.h>
22#include <stdio.h>
23#include <stddef.h>
24#include <unistd.h>
25#include <errno.h>
26#include <ctype.h>
27#include <fcntl.h>
28#include <signal.h>
29#include <syslog.h>
30#include <getopt.h>
31
32#include "udev.h"
33#include "udev_rules.h"
34
35
36#ifdef USE_LOG
37void log_message (int priority, const char *format, ...)
38{
39	va_list args;
40
41	if (priority > udev_log_priority)
42		return;
43
44	va_start(args, format);
45	vprintf(format, args);
46	va_end(args);
47	printf("\n");
48}
49#endif
50
51static int import_uevent_var(const char *devpath)
52{
53	char path[PATH_SIZE];
54	static char value[4096]; /* must stay, used with putenv */
55	ssize_t size;
56	int fd;
57	char *key;
58	char *next;
59	int rc = -1;
60
61	/* read uevent file */
62	strlcpy(path, sysfs_path, sizeof(path));
63	strlcat(path, devpath, sizeof(path));
64	strlcat(path, "/uevent", sizeof(path));
65	fd = open(path, O_RDONLY);
66	if (fd < 0)
67		goto out;
68	size = read(fd, value, sizeof(value));
69	close(fd);
70	if (size < 0)
71		goto out;
72	value[size] = '\0';
73
74	/* import keys into environment */
75	key = value;
76	while (key[0] != '\0') {
77		next = strchr(key, '\n');
78		if (next == NULL)
79			goto out;
80		next[0] = '\0';
81		info("import into environment: '%s'", key);
82		putenv(key);
83		key = &next[1];
84	}
85	rc = 0;
86out:
87	return rc;
88}
89
90int main(int argc, char *argv[], char *envp[])
91{
92	int force = 0;
93	char *action = "add";
94	char *subsystem = NULL;
95	char *devpath = NULL;
96	struct udevice *udev;
97	struct sysfs_device *dev;
98	struct udev_rules rules = {};
99	int retval;
100	int rc = 0;
101
102	static const struct option options[] = {
103		{ "action", 1, NULL, 'a' },
104		{ "subsystem", 1, NULL, 's' },
105		{ "force", 0, NULL, 'f' },
106		{ "help", 0, NULL, 'h' },
107		{}
108	};
109
110	info("version %s", UDEV_VERSION);
111	udev_config_init();
112	if (udev_log_priority < LOG_INFO) {
113		char priority[32];
114
115		udev_log_priority = LOG_INFO;
116		sprintf(priority, "%i", udev_log_priority);
117		setenv("UDEV_LOG", priority, 1);
118	}
119
120	while (1) {
121		int option;
122
123		option = getopt_long(argc, argv, "a:s:fh", options, NULL);
124		if (option == -1)
125			break;
126
127		dbg("option '%c'", option);
128		switch (option) {
129		case 'a':
130			action = optarg;
131			break;
132		case 's':
133			subsystem = optarg;
134			break;
135		case 'f':
136			force = 1;
137			break;
138		case 'h':
139			printf("Usage: udevtest OPTIONS <devpath>\n"
140			       "  --action=<string>     set action string\n"
141			       "  --subsystem=<string>  set subsystem string\n"
142			       "  --force               don't skip node/link creation\n"
143			       "  --help                print this help text\n\n");
144			exit(0);
145		default:
146			exit(1);
147		}
148	}
149	devpath = argv[optind];
150
151	if (devpath == NULL) {
152		fprintf(stderr, "devpath parameter missing\n");
153		rc = 1;
154		goto exit;
155	}
156
157	printf("This program is for debugging only, it does not run any program,\n"
158	       "specified by a RUN key. It may show incorrect results, because\n"
159	       "some values may be different, or not available at a simulation run.\n"
160	       "\n");
161
162	sysfs_init();
163	udev_rules_init(&rules, 0);
164
165	/* remove /sys if given */
166	if (strncmp(devpath, sysfs_path, strlen(sysfs_path)) == 0)
167		devpath = &devpath[strlen(sysfs_path)];
168
169	dev = sysfs_device_get(devpath);
170	if (dev == NULL) {
171		fprintf(stderr, "unable to open device '%s'\n", devpath);
172		rc = 2;
173		goto exit;
174	}
175
176	udev = udev_device_init(NULL);
177	if (udev == NULL) {
178		fprintf(stderr, "error initializing device\n");
179		rc = 3;
180		goto exit;
181	}
182
183	if (subsystem != NULL)
184		strlcpy(dev->subsystem, subsystem, sizeof(dev->subsystem));
185
186	/* override built-in sysfs device */
187	udev->dev = dev;
188	strlcpy(udev->action, action, sizeof(udev->action));
189	udev->devt = udev_device_get_devt(udev);
190
191	/* simulate node creation with test flag */
192	if (!force)
193		udev->test_run = 1;
194
195	setenv("DEVPATH", udev->dev->devpath, 1);
196	setenv("SUBSYSTEM", udev->dev->subsystem, 1);
197	setenv("ACTION", udev->action, 1);
198	import_uevent_var(udev->dev->devpath);
199
200	info("looking at device '%s' from subsystem '%s'", udev->dev->devpath, udev->dev->subsystem);
201	retval = udev_device_event(&rules, udev);
202	if (retval == 0 && !udev->ignore_device && udev_run) {
203		struct name_entry *name_loop;
204
205		list_for_each_entry(name_loop, &udev->run_list, node) {
206			char program[PATH_SIZE];
207
208			strlcpy(program, name_loop->name, sizeof(program));
209			udev_rules_apply_format(udev, program, sizeof(program));
210			info("run: '%s'", program);
211		}
212	}
213	udev_device_cleanup(udev);
214
215exit:
216	udev_rules_cleanup(&rules);
217	sysfs_cleanup();
218	return rc;
219}
220