2012-10-22 18:23:08 +02:00
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/***
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This file is part of systemd.
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2012-11-08 22:20:36 +01:00
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Copyright 2012 Kay Sievers <kay@vrfy.org>
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2012-10-22 18:23:08 +02:00
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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2009-06-16 20:57:28 +02:00
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2013-07-01 22:34:43 +02:00
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#include <fnmatch.h>
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2012-10-22 18:23:08 +02:00
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#include <getopt.h>
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2015-10-24 22:58:24 +02:00
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#include <stdio.h>
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#include <stdlib.h>
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2009-06-16 20:57:28 +02:00
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2014-12-15 19:58:25 +01:00
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#include "sd-hwdb.h"
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2009-06-16 20:57:28 +02:00
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2015-10-27 03:01:06 +01:00
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#include "alloc-util.h"
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2014-12-15 19:58:25 +01:00
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#include "hwdb-util.h"
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2015-10-24 22:58:24 +02:00
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#include "string-util.h"
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2015-06-23 16:57:57 +02:00
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#include "udev-util.h"
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2015-10-24 22:58:24 +02:00
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#include "udev.h"
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2014-12-15 19:58:25 +01:00
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static sd_hwdb *hwdb;
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2009-06-16 20:57:28 +02:00
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2013-07-01 22:34:43 +02:00
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int udev_builtin_hwdb_lookup(struct udev_device *dev,
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2013-07-08 11:44:17 +02:00
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const char *prefix, const char *modalias,
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const char *filter, bool test) {
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2015-07-24 13:49:11 +02:00
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_cleanup_free_ char *lookup = NULL;
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2014-12-15 19:58:25 +01:00
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const char *key, *value;
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2012-11-09 12:35:02 +01:00
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int n = 0;
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2012-11-15 17:30:03 +01:00
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if (!hwdb)
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return -ENOENT;
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2013-07-08 11:44:17 +02:00
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if (prefix) {
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2016-10-23 17:43:27 +02:00
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lookup = strjoin(prefix, modalias);
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2013-07-08 11:44:17 +02:00
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if (!lookup)
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return -ENOMEM;
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2014-12-15 19:58:25 +01:00
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modalias = lookup;
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}
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2013-07-08 11:44:17 +02:00
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2014-12-15 19:58:25 +01:00
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SD_HWDB_FOREACH_PROPERTY(hwdb, modalias, key, value) {
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if (filter && fnmatch(filter, key, FNM_NOESCAPE) != 0)
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2013-07-01 22:34:43 +02:00
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continue;
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2014-12-15 19:58:25 +01:00
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if (udev_builtin_add_property(dev, test, key, value) < 0)
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2012-11-09 12:35:02 +01:00
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return -ENOMEM;
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n++;
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}
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return n;
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}
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static const char *modalias_usb(struct udev_device *dev, char *s, size_t size) {
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const char *v, *p;
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int vn, pn;
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v = udev_device_get_sysattr_value(dev, "idVendor");
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if (!v)
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return NULL;
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p = udev_device_get_sysattr_value(dev, "idProduct");
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if (!p)
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return NULL;
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vn = strtol(v, NULL, 16);
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if (vn <= 0)
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return NULL;
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pn = strtol(p, NULL, 16);
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if (pn <= 0)
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return NULL;
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snprintf(s, size, "usb:v%04Xp%04X*", vn, pn);
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return s;
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}
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2013-07-01 22:34:43 +02:00
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static int udev_builtin_hwdb_search(struct udev_device *dev, struct udev_device *srcdev,
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2013-07-08 11:44:17 +02:00
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const char *subsystem, const char *prefix,
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const char *filter, bool test) {
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2012-11-09 12:35:02 +01:00
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struct udev_device *d;
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char s[16];
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2014-08-26 18:27:36 +02:00
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bool last = false;
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int r = 0;
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2012-11-09 12:35:02 +01:00
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2015-06-02 16:52:07 +02:00
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assert(dev);
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2015-06-23 16:57:57 +02:00
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if (!srcdev)
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srcdev = dev;
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2014-08-26 18:27:36 +02:00
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for (d = srcdev; d && !last; d = udev_device_get_parent(d)) {
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2012-11-09 12:35:02 +01:00
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const char *dsubsys;
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const char *modalias = NULL;
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dsubsys = udev_device_get_subsystem(d);
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if (!dsubsys)
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continue;
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/* look only at devices of a specific subsystem */
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if (subsystem && !streq(dsubsys, subsystem))
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continue;
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2013-08-07 13:10:01 +02:00
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modalias = udev_device_get_property_value(d, "MODALIAS");
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2014-08-26 18:27:36 +02:00
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if (streq(dsubsys, "usb") && streq_ptr(udev_device_get_devtype(d), "usb_device")) {
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/* if the usb_device does not have a modalias, compose one */
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if (!modalias)
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modalias = modalias_usb(d, s, sizeof(s));
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/* avoid looking at any parent device, they are usually just a USB hub */
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last = true;
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}
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2012-11-09 12:35:02 +01:00
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if (!modalias)
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continue;
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2013-07-01 22:34:43 +02:00
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2014-08-26 18:27:36 +02:00
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r = udev_builtin_hwdb_lookup(dev, prefix, modalias, filter, test);
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if (r > 0)
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2012-11-09 12:35:02 +01:00
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break;
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}
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2014-08-26 18:27:36 +02:00
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return r;
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2012-11-09 12:35:02 +01:00
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}
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2012-10-27 20:59:01 +02:00
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static int builtin_hwdb(struct udev_device *dev, int argc, char *argv[], bool test) {
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static const struct option options[] = {
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2013-07-01 22:34:43 +02:00
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{ "filter", required_argument, NULL, 'f' },
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{ "device", required_argument, NULL, 'd' },
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2012-10-27 20:59:01 +02:00
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{ "subsystem", required_argument, NULL, 's' },
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2013-07-08 11:44:17 +02:00
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{ "lookup-prefix", required_argument, NULL, 'p' },
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2012-10-27 20:59:01 +02:00
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{}
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2012-10-22 18:23:08 +02:00
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};
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2013-07-01 22:34:43 +02:00
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const char *filter = NULL;
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const char *device = NULL;
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2012-11-09 12:35:02 +01:00
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const char *subsystem = NULL;
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2013-07-08 11:44:17 +02:00
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const char *prefix = NULL;
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2015-06-23 16:57:57 +02:00
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_cleanup_udev_device_unref_ struct udev_device *srcdev = NULL;
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2009-06-16 20:57:28 +02:00
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2012-10-27 20:59:01 +02:00
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if (!hwdb)
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return EXIT_FAILURE;
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2009-06-16 20:57:28 +02:00
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2012-10-27 20:59:01 +02:00
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for (;;) {
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int option;
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2009-06-16 20:57:28 +02:00
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2013-07-08 11:44:17 +02:00
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option = getopt_long(argc, argv, "f:d:s:p:", options, NULL);
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2012-10-27 20:59:01 +02:00
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if (option == -1)
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break;
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2009-06-16 20:57:28 +02:00
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2012-10-27 20:59:01 +02:00
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switch (option) {
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2013-07-01 22:34:43 +02:00
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case 'f':
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filter = optarg;
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break;
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case 'd':
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device = optarg;
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break;
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2012-10-27 20:59:01 +02:00
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case 's':
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2012-11-09 12:35:02 +01:00
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subsystem = optarg;
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2012-10-27 20:59:01 +02:00
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break;
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2013-07-08 11:44:17 +02:00
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case 'p':
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prefix = optarg;
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break;
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2012-01-10 01:34:15 +01:00
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}
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}
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2009-06-16 20:57:28 +02:00
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2013-07-03 00:23:41 +02:00
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/* query a specific key given as argument */
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if (argv[optind]) {
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2013-07-08 11:44:17 +02:00
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if (udev_builtin_hwdb_lookup(dev, prefix, argv[optind], filter, test) > 0)
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2013-07-03 00:23:41 +02:00
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return EXIT_SUCCESS;
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return EXIT_FAILURE;
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}
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2013-07-01 22:34:43 +02:00
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/* read data from another device than the device we will store the data */
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if (device) {
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srcdev = udev_device_new_from_device_id(udev_device_get_udev(dev), device);
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if (!srcdev)
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return EXIT_FAILURE;
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2015-06-23 16:57:57 +02:00
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}
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2013-07-01 22:34:43 +02:00
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2013-07-09 15:47:11 +02:00
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if (udev_builtin_hwdb_search(dev, srcdev, subsystem, prefix, filter, test) > 0)
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return EXIT_SUCCESS;
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return EXIT_FAILURE;
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2012-10-22 18:23:08 +02:00
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}
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2009-06-16 20:57:28 +02:00
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2012-10-22 18:23:08 +02:00
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/* called at udev startup and reload */
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2014-07-29 15:47:41 +02:00
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static int builtin_hwdb_init(struct udev *udev) {
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2014-12-15 19:58:25 +01:00
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int r;
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2012-10-27 20:59:01 +02:00
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if (hwdb)
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2012-10-25 22:58:02 +02:00
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return 0;
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2014-12-15 19:58:25 +01:00
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r = sd_hwdb_new(&hwdb);
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if (r < 0)
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return r;
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2012-01-10 01:34:15 +01:00
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return 0;
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2011-12-27 17:02:52 +01:00
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}
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2009-06-16 20:57:28 +02:00
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2012-10-22 18:23:08 +02:00
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/* called on udev shutdown and reload request */
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2014-07-29 15:47:41 +02:00
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static void builtin_hwdb_exit(struct udev *udev) {
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2014-12-15 19:58:25 +01:00
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hwdb = sd_hwdb_unref(hwdb);
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2009-06-16 20:57:28 +02:00
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}
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2011-12-27 17:02:52 +01:00
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2012-10-22 18:23:08 +02:00
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/* called every couple of seconds during event activity; 'true' if config has changed */
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2014-07-29 15:47:41 +02:00
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static bool builtin_hwdb_validate(struct udev *udev) {
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2014-12-15 19:58:25 +01:00
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return hwdb_validate(hwdb);
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2012-10-22 18:23:08 +02:00
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}
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2011-12-27 17:02:52 +01:00
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2012-10-22 18:23:08 +02:00
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const struct udev_builtin udev_builtin_hwdb = {
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.name = "hwdb",
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.cmd = builtin_hwdb,
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.init = builtin_hwdb_init,
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.exit = builtin_hwdb_exit,
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.validate = builtin_hwdb_validate,
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2015-01-05 13:19:55 +01:00
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.help = "Hardware database",
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2011-12-27 17:02:52 +01:00
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};
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