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