| /* |
| * Copyright (C) 2004-2009 Kay Sievers <kay.sievers@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 <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <stddef.h> |
| #include <ctype.h> |
| #include <stdarg.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <getopt.h> |
| #include <fcntl.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #include "udev.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 (strcmp(name, skip[i]) == 0) |
| 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=%d\n" |
| "%sMINOR=%d\n", |
| prefix, major(statbuf.st_dev), |
| prefix, minor(statbuf.st_dev)); |
| } else |
| printf("%d:%d\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/watch"); |
| if (dir != NULL) { |
| cleanup_dir(dir, 0, 1); |
| closedir(dir); |
| } |
| |
| dir = opendir("/run/udev/firmware-missing"); |
| if (dir != NULL) { |
| cleanup_dir(dir, 0, 1); |
| closedir(dir); |
| } |
| } |
| |
| static int uinfo(struct udev *udev, int argc, char *argv[]) |
| { |
| struct udev_device *device = NULL; |
| bool root = 0; |
| bool export = 0; |
| const char *export_prefix = NULL; |
| char path[UTIL_PATH_SIZE]; |
| char name[UTIL_PATH_SIZE]; |
| struct udev_list_entry *list_entry; |
| int rc = 0; |
| |
| 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' }, |
| { "run", 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_NONE, |
| ACTION_QUERY, |
| ACTION_ATTRIBUTE_WALK, |
| ACTION_ROOT, |
| ACTION_DEVICE_ID_FILE, |
| } action = ACTION_NONE; |
| |
| enum query_type { |
| QUERY_NONE, |
| QUERY_NAME, |
| QUERY_PATH, |
| QUERY_SYMLINK, |
| QUERY_PROPERTY, |
| QUERY_ALL, |
| } query = QUERY_NONE; |
| |
| for (;;) { |
| int option; |
| struct stat statbuf; |
| |
| option = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL); |
| if (option == -1) |
| break; |
| |
| switch (option) { |
| case 'n': |
| if (device != NULL) { |
| fprintf(stderr, "device already specified\n"); |
| rc = 2; |
| goto exit; |
| } |
| /* add /dev if not given */ |
| if (!startswith(optarg, "/dev")) |
| util_strscpyl(name, sizeof(name), "/dev/", optarg, NULL); |
| else |
| util_strscpy(name, sizeof(name), optarg); |
| util_remove_trailing_chars(name, '/'); |
| if (stat(name, &statbuf) < 0) { |
| fprintf(stderr, "device node not found\n"); |
| rc = 2; |
| goto exit; |
| } else { |
| char type; |
| |
| if (S_ISBLK(statbuf.st_mode)) { |
| type = 'b'; |
| } else if (S_ISCHR(statbuf.st_mode)) { |
| type = 'c'; |
| } else { |
| fprintf(stderr, "device node has wrong file type\n"); |
| rc = 2; |
| goto exit; |
| } |
| device = udev_device_new_from_devnum(udev, type, statbuf.st_rdev); |
| if (device == NULL) { |
| fprintf(stderr, "device node not found\n"); |
| rc = 2; |
| goto exit; |
| } |
| } |
| break; |
| case 'p': |
| if (device != NULL) { |
| fprintf(stderr, "device already specified\n"); |
| rc = 2; |
| goto exit; |
| } |
| /* add sys dir if needed */ |
| if (!startswith(optarg, "/sys")) |
| util_strscpyl(path, sizeof(path), "/sys", optarg, NULL); |
| else |
| util_strscpy(path, sizeof(path), optarg); |
| util_remove_trailing_chars(path, '/'); |
| device = udev_device_new_from_syspath(udev, path); |
| if (device == NULL) { |
| fprintf(stderr, "device path not found\n"); |
| rc = 2; |
| goto exit; |
| } |
| break; |
| case 'q': |
| action = ACTION_QUERY; |
| if (strcmp(optarg, "property") == 0 || strcmp(optarg, "env") == 0) { |
| query = QUERY_PROPERTY; |
| } else if (strcmp(optarg, "name") == 0) { |
| query = QUERY_NAME; |
| } else if (strcmp(optarg, "symlink") == 0) { |
| query = QUERY_SYMLINK; |
| } else if (strcmp(optarg, "path") == 0) { |
| query = QUERY_PATH; |
| } else if (strcmp(optarg, "all") == 0) { |
| query = QUERY_ALL; |
| } else { |
| fprintf(stderr, "unknown query type\n"); |
| rc = 3; |
| goto exit; |
| } |
| break; |
| case 'r': |
| if (action == ACTION_NONE) |
| action = ACTION_ROOT; |
| root = true; |
| break; |
| case 'R': |
| printf("/run/udev\n"); |
| goto exit; |
| case 'd': |
| action = ACTION_DEVICE_ID_FILE; |
| util_strscpy(name, sizeof(name), optarg); |
| break; |
| case 'a': |
| action = ACTION_ATTRIBUTE_WALK; |
| break; |
| case 'e': |
| export_devices(udev); |
| goto exit; |
| case 'c': |
| cleanup_db(udev); |
| goto exit; |
| case 'x': |
| export = true; |
| break; |
| case 'P': |
| export_prefix = optarg; |
| break; |
| case 'V': |
| printf("%s\n", VERSION); |
| goto exit; |
| case 'h': |
| printf("Usage: udevadm info OPTIONS\n" |
| " --query=<type> query device information:\n" |
| " name name of device node\n" |
| " symlink pointing to node\n" |
| " path sys device path\n" |
| " property the device properties\n" |
| " all all values\n" |
| " --path=<syspath> sys device path used for query or attribute walk\n" |
| " --name=<name> node or symlink name used for query or attribute walk\n" |
| " --root prepend dev directory to path names\n" |
| " --attribute-walk print all key matches while walking along the chain\n" |
| " of parent devices\n" |
| " --device-id-of-file=<file> print major:minor of device containing this file\n" |
| " --export export key/value pairs\n" |
| " --export-prefix export the key name with a prefix\n" |
| " --export-db export the content of the udev database\n" |
| " --cleanup-db cleanup the udev database\n" |
| " --help\n\n"); |
| goto exit; |
| default: |
| rc = 1; |
| goto exit; |
| } |
| } |
| |
| switch (action) { |
| case ACTION_QUERY: |
| if (device == NULL) { |
| fprintf(stderr, "query needs a valid device specified by --path= or --name=\n"); |
| rc = 4; |
| goto exit; |
| } |
| |
| switch(query) { |
| case QUERY_NAME: { |
| const char *node = udev_device_get_devnode(device); |
| |
| if (node == NULL) { |
| fprintf(stderr, "no device node found\n"); |
| rc = 5; |
| goto exit; |
| } |
| |
| 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)); |
| goto exit; |
| 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: |
| fprintf(stderr, "unknown query type\n"); |
| break; |
| } |
| break; |
| case ACTION_ATTRIBUTE_WALK: |
| if (device == NULL) { |
| fprintf(stderr, "query needs a valid device specified by --path= or --name=\n"); |
| rc = 4; |
| goto exit; |
| } |
| print_device_chain(device); |
| break; |
| case ACTION_DEVICE_ID_FILE: |
| if (stat_device(name, export, export_prefix) != 0) |
| rc = 1; |
| break; |
| case ACTION_ROOT: |
| printf("/dev\n"); |
| break; |
| default: |
| fprintf(stderr, "missing option\n"); |
| rc = 1; |
| break; |
| } |
| |
| exit: |
| udev_device_unref(device); |
| return rc; |
| } |
| |
| const struct udevadm_cmd udevadm_info = { |
| .name = "info", |
| .cmd = uinfo, |
| .help = "query sysfs or the udev database", |
| }; |