| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * |
| */ |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #include "dirent-util.h" |
| #include "fd-util.h" |
| #include "string-util.h" |
| #include "udev-util.h" |
| #include "udev.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 -errno; |
| |
| 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) { |
| _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *udev_enumerate; |
| struct udev_list_entry *list_entry; |
| |
| udev_enumerate = udev_enumerate_new(udev); |
| if (udev_enumerate == NULL) |
| return -ENOMEM; |
| |
| udev_enumerate_scan_devices(udev_enumerate); |
| udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) { |
| _cleanup_(udev_device_unrefp) struct udev_device *device; |
| |
| device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry)); |
| if (device != NULL) |
| print_record(device); |
| } |
| |
| return 0; |
| } |
| |
| static void cleanup_dir(DIR *dir, mode_t mask, int depth) { |
| struct dirent *dent; |
| |
| if (depth <= 0) |
| return; |
| |
| FOREACH_DIRENT_ALL(dent, dir, break) { |
| 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)) { |
| _cleanup_closedir_ 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); |
| |
| (void) unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR); |
| } else |
| (void) unlinkat(dirfd(dir), dent->d_name, 0); |
| } |
| } |
| |
| static void cleanup_db(struct udev *udev) { |
| _cleanup_closedir_ DIR *dir1 = NULL, *dir2 = NULL, *dir3 = NULL, *dir4 = NULL, *dir5 = NULL; |
| |
| (void) unlink("/run/udev/queue.bin"); |
| |
| dir1 = opendir("/run/udev/data"); |
| if (dir1 != NULL) |
| cleanup_dir(dir1, S_ISVTX, 1); |
| |
| dir2 = opendir("/run/udev/links"); |
| if (dir2 != NULL) |
| cleanup_dir(dir2, 0, 2); |
| |
| dir3 = opendir("/run/udev/tags"); |
| if (dir3 != NULL) |
| cleanup_dir(dir3, 0, 2); |
| |
| dir4 = opendir("/run/udev/static_node-tags"); |
| if (dir4 != NULL) |
| cleanup_dir(dir4, 0, 2); |
| |
| dir5 = opendir("/run/udev/watch"); |
| if (dir5 != NULL) |
| cleanup_dir(dir5, 0, 1); |
| } |
| |
| 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" |
| " -V --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_unrefp) 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': |
| if (export_devices(udev) < 0) |
| return 1; |
| return 0; |
| case 'c': |
| cleanup_db(udev); |
| return 0; |
| case 'x': |
| export = true; |
| break; |
| case 'P': |
| export_prefix = optarg; |
| break; |
| case 'V': |
| print_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) |
| printf("%s%s='%s'\n", strempty(export_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", |
| }; |