+++ /dev/null
-/*
- * Copyright (C) 2004-2009 Kay Sievers <kay@vrfy.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <string.h>
-#include <stdio.h>
-#include <stddef.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <errno.h>
-#include <getopt.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-
-#include "udev.h"
-#include "udev-util.h"
-#include "udevadm-util.h"
-
-static bool skip_attribute(const char *name) {
- static const char* const skip[] = {
- "uevent",
- "dev",
- "modalias",
- "resource",
- "driver",
- "subsystem",
- "module",
- };
- unsigned int i;
-
- for (i = 0; i < ELEMENTSOF(skip); i++)
- if (streq(name, skip[i]))
- return true;
- return false;
-}
-
-static void print_all_attributes(struct udev_device *device, const char *key) {
- struct udev_list_entry *sysattr;
-
- udev_list_entry_foreach(sysattr, udev_device_get_sysattr_list_entry(device)) {
- const char *name;
- const char *value;
- size_t len;
-
- name = udev_list_entry_get_name(sysattr);
- if (skip_attribute(name))
- continue;
-
- value = udev_device_get_sysattr_value(device, name);
- if (value == NULL)
- continue;
-
- /* skip any values that look like a path */
- if (value[0] == '/')
- continue;
-
- /* skip nonprintable attributes */
- len = strlen(value);
- while (len > 0 && isprint(value[len-1]))
- len--;
- if (len > 0)
- continue;
-
- printf(" %s{%s}==\"%s\"\n", key, name, value);
- }
- printf("\n");
-}
-
-static int print_device_chain(struct udev_device *device) {
- struct udev_device *device_parent;
- const char *str;
-
- printf("\n"
- "Udevadm info starts with the device specified by the devpath and then\n"
- "walks up the chain of parent devices. It prints for every device\n"
- "found, all possible attributes in the udev rules key format.\n"
- "A rule to match, can be composed by the attributes of the device\n"
- "and the attributes from one single parent device.\n"
- "\n");
-
- printf(" looking at device '%s':\n", udev_device_get_devpath(device));
- printf(" KERNEL==\"%s\"\n", udev_device_get_sysname(device));
- str = udev_device_get_subsystem(device);
- if (str == NULL)
- str = "";
- printf(" SUBSYSTEM==\"%s\"\n", str);
- str = udev_device_get_driver(device);
- if (str == NULL)
- str = "";
- printf(" DRIVER==\"%s\"\n", str);
- print_all_attributes(device, "ATTR");
-
- device_parent = device;
- do {
- device_parent = udev_device_get_parent(device_parent);
- if (device_parent == NULL)
- break;
- printf(" looking at parent device '%s':\n", udev_device_get_devpath(device_parent));
- printf(" KERNELS==\"%s\"\n", udev_device_get_sysname(device_parent));
- str = udev_device_get_subsystem(device_parent);
- if (str == NULL)
- str = "";
- printf(" SUBSYSTEMS==\"%s\"\n", str);
- str = udev_device_get_driver(device_parent);
- if (str == NULL)
- str = "";
- printf(" DRIVERS==\"%s\"\n", str);
- print_all_attributes(device_parent, "ATTRS");
- } while (device_parent != NULL);
-
- return 0;
-}
-
-static void print_record(struct udev_device *device) {
- const char *str;
- int i;
- struct udev_list_entry *list_entry;
-
- printf("P: %s\n", udev_device_get_devpath(device));
-
- str = udev_device_get_devnode(device);
- if (str != NULL)
- printf("N: %s\n", str + strlen("/dev/"));
-
- i = udev_device_get_devlink_priority(device);
- if (i != 0)
- printf("L: %i\n", i);
-
- udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device))
- printf("S: %s\n", udev_list_entry_get_name(list_entry) + strlen("/dev/"));
-
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device))
- printf("E: %s=%s\n",
- udev_list_entry_get_name(list_entry),
- udev_list_entry_get_value(list_entry));
- printf("\n");
-}
-
-static int stat_device(const char *name, bool export, const char *prefix) {
- struct stat statbuf;
-
- if (stat(name, &statbuf) != 0)
- return -1;
-
- if (export) {
- if (prefix == NULL)
- prefix = "INFO_";
- printf("%sMAJOR=%u\n"
- "%sMINOR=%u\n",
- prefix, major(statbuf.st_dev),
- prefix, minor(statbuf.st_dev));
- } else
- printf("%u:%u\n", major(statbuf.st_dev), minor(statbuf.st_dev));
- return 0;
-}
-
-static int export_devices(struct udev *udev) {
- struct udev_enumerate *udev_enumerate;
- struct udev_list_entry *list_entry;
-
- udev_enumerate = udev_enumerate_new(udev);
- if (udev_enumerate == NULL)
- return -1;
- udev_enumerate_scan_devices(udev_enumerate);
- udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
- struct udev_device *device;
-
- device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
- if (device != NULL) {
- print_record(device);
- udev_device_unref(device);
- }
- }
- udev_enumerate_unref(udev_enumerate);
- return 0;
-}
-
-static void cleanup_dir(DIR *dir, mode_t mask, int depth) {
- struct dirent *dent;
-
- if (depth <= 0)
- return;
-
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- struct stat stats;
-
- if (dent->d_name[0] == '.')
- continue;
- if (fstatat(dirfd(dir), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0)
- continue;
- if ((stats.st_mode & mask) != 0)
- continue;
- if (S_ISDIR(stats.st_mode)) {
- DIR *dir2;
-
- dir2 = fdopendir(openat(dirfd(dir), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC));
- if (dir2 != NULL) {
- cleanup_dir(dir2, mask, depth-1);
- closedir(dir2);
- }
- unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR);
- } else {
- unlinkat(dirfd(dir), dent->d_name, 0);
- }
- }
-}
-
-static void cleanup_db(struct udev *udev) {
- DIR *dir;
-
- unlink("/run/udev/queue.bin");
-
- dir = opendir("/run/udev/data");
- if (dir != NULL) {
- cleanup_dir(dir, S_ISVTX, 1);
- closedir(dir);
- }
-
- dir = opendir("/run/udev/links");
- if (dir != NULL) {
- cleanup_dir(dir, 0, 2);
- closedir(dir);
- }
-
- dir = opendir("/run/udev/tags");
- if (dir != NULL) {
- cleanup_dir(dir, 0, 2);
- closedir(dir);
- }
-
- dir = opendir("/run/udev/static_node-tags");
- if (dir != NULL) {
- cleanup_dir(dir, 0, 2);
- closedir(dir);
- }
-
- dir = opendir("/run/udev/watch");
- if (dir != NULL) {
- cleanup_dir(dir, 0, 1);
- closedir(dir);
- }
-}
-
-static void help(void) {
-
- printf("%s info [OPTIONS] [DEVPATH|FILE]\n\n"
- "Query sysfs or the udev database.\n\n"
- " -h --help Print this message\n"
- " --version Print version of the program\n"
- " -q --query=TYPE Query device information:\n"
- " name Name of device node\n"
- " symlink Pointing to node\n"
- " path sysfs device path\n"
- " property The device properties\n"
- " all All values\n"
- " -p --path=SYSPATH sysfs device path used for query or attribute walk\n"
- " -n --name=NAME Node or symlink name used for query or attribute walk\n"
- " -r --root Prepend dev directory to path names\n"
- " -a --attribute-walk Print all key matches walking along the chain\n"
- " of parent devices\n"
- " -d --device-id-of-file=FILE Print major:minor of device containing this file\n"
- " -x --export Export key/value pairs\n"
- " -P --export-prefix Export the key name with a prefix\n"
- " -e --export-db Export the content of the udev database\n"
- " -c --cleanup-db Clean up the udev database\n"
- , program_invocation_short_name);
-}
-
-static int uinfo(struct udev *udev, int argc, char *argv[]) {
- _cleanup_udev_device_unref_ struct udev_device *device = NULL;
- bool root = 0;
- bool export = 0;
- const char *export_prefix = NULL;
- char name[UTIL_PATH_SIZE];
- struct udev_list_entry *list_entry;
- int c;
-
- static const struct option options[] = {
- { "name", required_argument, NULL, 'n' },
- { "path", required_argument, NULL, 'p' },
- { "query", required_argument, NULL, 'q' },
- { "attribute-walk", no_argument, NULL, 'a' },
- { "cleanup-db", no_argument, NULL, 'c' },
- { "export-db", no_argument, NULL, 'e' },
- { "root", no_argument, NULL, 'r' },
- { "device-id-of-file", required_argument, NULL, 'd' },
- { "export", no_argument, NULL, 'x' },
- { "export-prefix", required_argument, NULL, 'P' },
- { "version", no_argument, NULL, 'V' },
- { "help", no_argument, NULL, 'h' },
- {}
- };
-
- enum action_type {
- ACTION_QUERY,
- ACTION_ATTRIBUTE_WALK,
- ACTION_DEVICE_ID_FILE,
- } action = ACTION_QUERY;
-
- enum query_type {
- QUERY_NAME,
- QUERY_PATH,
- QUERY_SYMLINK,
- QUERY_PROPERTY,
- QUERY_ALL,
- } query = QUERY_ALL;
-
- while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL)) >= 0)
- switch (c) {
- case 'n': {
- if (device != NULL) {
- fprintf(stderr, "device already specified\n");
- return 2;
- }
-
- device = find_device(udev, optarg, "/dev/");
- if (device == NULL) {
- fprintf(stderr, "device node not found\n");
- return 2;
- }
- break;
- }
- case 'p':
- if (device != NULL) {
- fprintf(stderr, "device already specified\n");
- return 2;
- }
-
- device = find_device(udev, optarg, "/sys");
- if (device == NULL) {
- fprintf(stderr, "syspath not found\n");
- return 2;
- }
- break;
- case 'q':
- action = ACTION_QUERY;
- if (streq(optarg, "property") || streq(optarg, "env"))
- query = QUERY_PROPERTY;
- else if (streq(optarg, "name"))
- query = QUERY_NAME;
- else if (streq(optarg, "symlink"))
- query = QUERY_SYMLINK;
- else if (streq(optarg, "path"))
- query = QUERY_PATH;
- else if (streq(optarg, "all"))
- query = QUERY_ALL;
- else {
- fprintf(stderr, "unknown query type\n");
- return 3;
- }
- break;
- case 'r':
- root = true;
- break;
- case 'd':
- action = ACTION_DEVICE_ID_FILE;
- strscpy(name, sizeof(name), optarg);
- break;
- case 'a':
- action = ACTION_ATTRIBUTE_WALK;
- break;
- case 'e':
- export_devices(udev);
- return 0;
- case 'c':
- cleanup_db(udev);
- return 0;
- case 'x':
- export = true;
- break;
- case 'P':
- export_prefix = optarg;
- break;
- case 'V':
- printf("%s\n", VERSION);
- return 0;
- case 'h':
- help();
- return 0;
- default:
- return 1;
- }
-
- switch (action) {
- case ACTION_QUERY:
- if (!device) {
- if (!argv[optind]) {
- help();
- return 2;
- }
- device = find_device(udev, argv[optind], NULL);
- if (!device) {
- fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
- return 4;
- }
- }
-
- switch(query) {
- case QUERY_NAME: {
- const char *node = udev_device_get_devnode(device);
-
- if (node == NULL) {
- fprintf(stderr, "no device node found\n");
- return 5;
- }
-
- if (root)
- printf("%s\n", udev_device_get_devnode(device));
- else
- printf("%s\n", udev_device_get_devnode(device) + strlen("/dev/"));
- break;
- }
- case QUERY_SYMLINK:
- list_entry = udev_device_get_devlinks_list_entry(device);
- while (list_entry != NULL) {
- if (root)
- printf("%s", udev_list_entry_get_name(list_entry));
- else
- printf("%s", udev_list_entry_get_name(list_entry) + strlen("/dev/"));
- list_entry = udev_list_entry_get_next(list_entry);
- if (list_entry != NULL)
- printf(" ");
- }
- printf("\n");
- break;
- case QUERY_PATH:
- printf("%s\n", udev_device_get_devpath(device));
- return 0;
- case QUERY_PROPERTY:
- list_entry = udev_device_get_properties_list_entry(device);
- while (list_entry != NULL) {
- if (export) {
- const char *prefix = export_prefix;
-
- if (prefix == NULL)
- prefix = "";
- printf("%s%s='%s'\n", prefix,
- udev_list_entry_get_name(list_entry),
- udev_list_entry_get_value(list_entry));
- } else {
- printf("%s=%s\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
- }
- list_entry = udev_list_entry_get_next(list_entry);
- }
- break;
- case QUERY_ALL:
- print_record(device);
- break;
- default:
- assert_not_reached("unknown query type");
- }
- break;
- case ACTION_ATTRIBUTE_WALK:
- if (!device && argv[optind]) {
- device = find_device(udev, argv[optind], NULL);
- if (!device) {
- fprintf(stderr, "Unknown device, absolute path in /dev/ or /sys expected.\n");
- return 4;
- }
- }
- if (!device) {
- fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
- return 4;
- }
- print_device_chain(device);
- break;
- case ACTION_DEVICE_ID_FILE:
- if (stat_device(name, export, export_prefix) != 0)
- return 1;
- break;
- }
-
- return 0;
-}
-
-const struct udevadm_cmd udevadm_info = {
- .name = "info",
- .cmd = uinfo,
- .help = "Query sysfs or the udev database",
-};
~ianmdlvl / elogind.git / blobdiff