482 lines
13 KiB
C
482 lines
13 KiB
C
/*
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* Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <errno.h>
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#include <getopt.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "udev.h"
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static void print_all_attributes(struct udev_device *device, const char *key)
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{
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struct udev *udev = udev_device_get_udev(device);
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DIR *dir;
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struct dirent *dent;
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dir = opendir(udev_device_get_syspath(device));
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if (dir != NULL) {
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for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
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struct stat statbuf;
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char filename[UTIL_PATH_SIZE];
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const char *value;
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size_t len;
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if (dent->d_name[0] == '.')
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continue;
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if (strcmp(dent->d_name, "uevent") == 0)
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continue;
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if (strcmp(dent->d_name, "dev") == 0)
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continue;
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util_strlcpy(filename, udev_device_get_syspath(device), sizeof(filename));
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util_strlcat(filename, "/", sizeof(filename));
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util_strlcat(filename, dent->d_name, sizeof(filename));
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if (lstat(filename, &statbuf) != 0)
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continue;
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if (S_ISLNK(statbuf.st_mode))
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continue;
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value = udev_device_get_attr_value(device, dent->d_name);
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if (value == NULL)
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continue;
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dbg(udev, "attr '%s'='%s'(%zi)\n", dent->d_name, value, len);
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/* skip nonprintable attributes */
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len = strlen(value);
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while (len > 0 && isprint(value[len-1]))
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len--;
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if (len > 0) {
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dbg(udev, "attribute value of '%s' non-printable, skip\n", dent->d_name);
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continue;
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}
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printf(" %s{%s}==\"%s\"\n", key, dent->d_name, value);
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}
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closedir(dir);
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}
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printf("\n");
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}
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static int print_device_chain(struct udev_device *device)
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{
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struct udev_device *device_parent;
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const char *str;
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printf("\n"
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"Udevinfo starts with the device specified by the devpath and then\n"
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"walks up the chain of parent devices. It prints for every device\n"
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"found, all possible attributes in the udev rules key format.\n"
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"A rule to match, can be composed by the attributes of the device\n"
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"and the attributes from one single parent device.\n"
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"\n");
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printf(" looking at device '%s':\n", udev_device_get_devpath(device));
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printf(" KERNEL==\"%s\"\n", udev_device_get_sysname(device));
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str = udev_device_get_subsystem(device);
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if (str == NULL)
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str = "";
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printf(" SUBSYSTEM==\"%s\"\n", str);
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str = udev_device_get_driver(device);
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if (str == NULL)
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str = "";
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printf(" DRIVER==\"%s\"\n", str);
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print_all_attributes(device, "ATTR");
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device_parent = device;
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do {
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device_parent = udev_device_get_parent(device_parent);
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if (device_parent == NULL)
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break;
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printf(" looking at parent device '%s':\n", udev_device_get_devpath(device_parent));
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printf(" KERNELS==\"%s\"\n", udev_device_get_sysname(device_parent));
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str = udev_device_get_subsystem(device_parent);
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if (str == NULL)
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str = "";
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printf(" SUBSYSTEMS==\"%s\"\n", str);
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str = udev_device_get_driver(device_parent);
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if (str == NULL)
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str = "";
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printf(" DRIVERS==\"%s\"\n", str);
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print_all_attributes(device_parent, "ATTRS");
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} while (device_parent != NULL);
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return 0;
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}
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static void print_record(struct udev_device *device)
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{
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size_t len;
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int i;
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struct udev_list_entry *list_entry;
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printf("P: %s\n", udev_device_get_devpath(device));
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len = strlen(udev_get_dev_path(udev_device_get_udev(device)));
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printf("N: %s\n", &udev_device_get_devnode(device)[len+1]);
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i = device_get_devlink_priority(device);
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if (i != 0)
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printf("L: %i\n", i);
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i = device_get_num_fake_partitions(device);
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if (i != 0)
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printf("A:%u\n", i);
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i = device_get_ignore_remove(device);
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if (i != 0)
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printf("R:%u\n", i);
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udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) {
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len = strlen(udev_get_dev_path(udev_device_get_udev(device)));
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printf("S: %s\n", &udev_list_entry_get_name(list_entry)[len+1]);
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}
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udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device))
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printf("E: %s=%s\n",
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udev_list_entry_get_name(list_entry),
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udev_list_entry_get_value(list_entry));
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printf("\n");
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}
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static int stat_device(const char *name, int export, const char *prefix)
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{
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struct stat statbuf;
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if (stat(name, &statbuf) != 0)
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return -1;
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if (export) {
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if (prefix == NULL)
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prefix = "INFO_";
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printf("%sMAJOR=%d\n"
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"%sMINOR=%d\n",
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prefix, major(statbuf.st_dev),
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prefix, minor(statbuf.st_dev));
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} else
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printf("%d:%d\n", major(statbuf.st_dev), minor(statbuf.st_dev));
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return 0;
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}
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static int export_devices(struct udev *udev)
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{
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struct udev_enumerate *udev_enumerate;
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struct udev_list_entry *list_entry;
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udev_enumerate = udev_enumerate_new(udev);
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if (udev_enumerate == NULL)
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return -1;
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udev_enumerate_scan_devices(udev_enumerate);
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udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
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struct udev_device *device;
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device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
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if (device != NULL) {
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if (udev_device_get_devnode(device) != NULL)
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print_record(device);
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udev_device_unref(device);
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}
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}
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udev_enumerate_unref(udev_enumerate);
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return 0;
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}
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int udevadm_info(struct udev *udev, int argc, char *argv[])
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{
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struct udev_device *device = NULL;
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int root = 0;
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int export = 0;
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const char *export_prefix = NULL;
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char path[UTIL_PATH_SIZE];
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char name[UTIL_PATH_SIZE];
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struct udev_list_entry *list_entry;
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int rc = 0;
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static const struct option options[] = {
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{ "name", required_argument, NULL, 'n' },
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{ "path", required_argument, NULL, 'p' },
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{ "query", required_argument, NULL, 'q' },
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{ "attribute-walk", no_argument, NULL, 'a' },
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{ "export-db", no_argument, NULL, 'e' },
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{ "root", no_argument, NULL, 'r' },
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{ "device-id-of-file", required_argument, NULL, 'd' },
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{ "export", no_argument, NULL, 'x' },
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{ "export-prefix", required_argument, NULL, 'P' },
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{ "version", no_argument, NULL, 1 }, /* -V outputs braindead format */
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{ "help", no_argument, NULL, 'h' },
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{}
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};
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enum action_type {
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ACTION_NONE,
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ACTION_QUERY,
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ACTION_ATTRIBUTE_WALK,
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ACTION_ROOT,
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ACTION_DEVICE_ID_FILE,
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} action = ACTION_NONE;
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enum query_type {
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QUERY_NONE,
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QUERY_NAME,
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QUERY_PATH,
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QUERY_SYMLINK,
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QUERY_ENV,
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QUERY_ALL,
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} query = QUERY_NONE;
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while (1) {
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int option;
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struct stat statbuf;
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option = getopt_long(argc, argv, "aed:n:p:q:rxPVh", options, NULL);
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if (option == -1)
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break;
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dbg(udev, "option '%c'\n", option);
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switch (option) {
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case 'n':
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if (device != NULL) {
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fprintf(stderr, "device already specified\n");
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rc = 2;
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goto exit;
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}
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/* remove /dev if given */
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if (strncmp(optarg, udev_get_dev_path(udev), strlen(udev_get_dev_path(udev))) != 0) {
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util_strlcpy(name, udev_get_dev_path(udev), sizeof(name));
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util_strlcat(name, "/", sizeof(name));
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util_strlcat(name, optarg, sizeof(name));
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} else {
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util_strlcpy(name, optarg, sizeof(name));
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}
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util_remove_trailing_chars(name, '/');
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if (stat(name, &statbuf) < 0) {
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fprintf(stderr, "device node not found\n");
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rc = 2;
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goto exit;
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} else {
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char type;
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if (S_ISBLK(statbuf.st_mode)) {
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type = 'b';
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} else if (S_ISCHR(statbuf.st_mode)) {
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type = 'c';
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} else {
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fprintf(stderr, "device node has wrong file type\n");
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rc = 2;
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goto exit;
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}
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device = udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
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if (device == NULL) {
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fprintf(stderr, "device node not found\n");
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rc = 2;
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goto exit;
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}
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}
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break;
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case 'p':
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if (device != NULL) {
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fprintf(stderr, "device already specified\n");
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rc = 2;
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goto exit;
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}
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/* add sys dir if needed */
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if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
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util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
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util_strlcat(path, optarg, sizeof(path));
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} else {
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util_strlcpy(path, optarg, sizeof(path));
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}
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util_remove_trailing_chars(path, '/');
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device = udev_device_new_from_syspath(udev, path);
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if (device == NULL) {
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fprintf(stderr, "device path not found\n");
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rc = 2;
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goto exit;
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}
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break;
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case 'q':
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action = ACTION_QUERY;
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if (strcmp(optarg, "name") == 0) {
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query = QUERY_NAME;
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break;
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}
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if (strcmp(optarg, "symlink") == 0) {
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query = QUERY_SYMLINK;
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break;
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}
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if (strcmp(optarg, "path") == 0) {
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query = QUERY_PATH;
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break;
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}
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if (strcmp(optarg, "env") == 0) {
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query = QUERY_ENV;
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break;
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}
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if (strcmp(optarg, "all") == 0) {
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query = QUERY_ALL;
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break;
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}
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fprintf(stderr, "unknown query type\n");
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rc = 3;
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goto exit;
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case 'r':
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if (action == ACTION_NONE)
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action = ACTION_ROOT;
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root = 1;
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break;
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case 'd':
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action = ACTION_DEVICE_ID_FILE;
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util_strlcpy(name, optarg, sizeof(name));
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break;
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case 'a':
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action = ACTION_ATTRIBUTE_WALK;
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break;
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case 'e':
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export_devices(udev);
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goto exit;
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case 'x':
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export = 1;
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break;
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case 'P':
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export_prefix = optarg;
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break;
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case 1:
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printf("%s\n", VERSION);
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goto exit;
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case 'V':
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printf("udevinfo, version %s\n", VERSION);
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goto exit;
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case 'h':
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printf("Usage: udevadm info OPTIONS\n"
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" --query=<type> query device information:\n"
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" name name of device node\n"
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" symlink pointing to node\n"
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" path sys device path\n"
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" env the device related imported environment\n"
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" all all values\n"
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" --path=<syspath> sys device path used for query or attribute walk\n"
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" --name=<name> node or symlink name used for query or attribute walk\n"
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" --root prepend dev directory to path names\n"
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" --attribute-walk print all key matches while walking along the chain\n"
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" of parent devices\n"
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" --device-id-of-file=<file> print major:minor of device containing this file\n"
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" --export-db export the content of the udev database\n"
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" --help print this text\n"
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"\n");
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goto exit;
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default:
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goto exit;
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}
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}
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switch (action) {
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case ACTION_QUERY:
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if (device == NULL) {
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fprintf(stderr, "query needs a valid device specified by --path= or --name=\n");
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rc = 4;
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goto exit;
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}
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switch(query) {
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case QUERY_NAME:
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if (root) {
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printf("%s\n", udev_device_get_devnode(device));
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} else {
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size_t len;
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const char *node;
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len = strlen(udev_get_dev_path(udev));
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node = udev_device_get_devnode(device);
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if (node == NULL) {
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fprintf(stderr, "no device node found\n");
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rc = 5;
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goto exit;
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}
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printf("%s\n", &udev_device_get_devnode(device)[len+1]);
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}
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break;
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case QUERY_SYMLINK:
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list_entry = udev_device_get_devlinks_list_entry(device);
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while (list_entry != NULL) {
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if (root) {
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printf("%s", udev_list_entry_get_name(list_entry));
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} else {
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size_t len;
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len = strlen(udev_get_dev_path(udev_device_get_udev(device)));
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printf("%s", &udev_list_entry_get_name(list_entry)[len+1]);
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}
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list_entry = udev_list_entry_get_next(list_entry);
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if (list_entry != NULL)
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printf(" ");
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}
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printf("\n");
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break;
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case QUERY_PATH:
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printf("%s\n", udev_device_get_devpath(device));
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goto exit;
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case QUERY_ENV:
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list_entry = udev_device_get_properties_list_entry(device);
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while (list_entry != NULL) {
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printf("%s=%s\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
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list_entry = udev_list_entry_get_next(list_entry);
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}
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break;
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case QUERY_ALL:
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print_record(device);
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break;
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default:
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fprintf(stderr, "unknown query type\n");
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break;
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}
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break;
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case ACTION_ATTRIBUTE_WALK:
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if (device == NULL) {
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fprintf(stderr, "query needs a valid device specified by --path= or --name=\n");
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rc = 4;
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goto exit;
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}
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print_device_chain(device);
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break;
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case ACTION_DEVICE_ID_FILE:
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if (stat_device(name, export, export_prefix) != 0)
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rc = 1;
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break;
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case ACTION_ROOT:
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printf("%s\n", udev_get_dev_path(udev));
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break;
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default:
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fprintf(stderr, "missing option\n");
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rc = 1;
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break;
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}
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exit:
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udev_device_unref(device);
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return rc;
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}
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