diff options
Diffstat (limited to 'src/udevadm-info.c')
| -rw-r--r-- | src/udevadm-info.c | 568 |
1 files changed, 568 insertions, 0 deletions
diff --git a/src/udevadm-info.c b/src/udevadm-info.c new file mode 100644 index 0000000000..f7e7e86b6a --- /dev/null +++ b/src/udevadm-info.c @@ -0,0 +1,568 @@ +/* + * 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 < ARRAY_SIZE(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 *udev = udev_device_get_udev(device); + 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; + dbg(udev, "attr '%s'='%s'\n", name, value); + + /* 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) { + dbg(udev, "attribute value of '%s' non-printable, skip\n", name); + 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) +{ + size_t len; + const char *str; + int i; + struct udev_list_entry *list_entry; + + printf("P: %s\n", udev_device_get_devpath(device)); + + len = strlen(udev_get_dev_path(udev_device_get_udev(device))); + str = udev_device_get_devnode(device); + if (str != NULL) + printf("N: %s\n", &str[len+1]); + + 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)) { + len = strlen(udev_get_dev_path(udev_device_get_udev(device))); + printf("S: %s\n", &udev_list_entry_get_name(list_entry)[len+1]); + } + + 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) +{ + char filename[UTIL_PATH_SIZE]; + DIR *dir; + + util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/queue.bin", NULL); + unlink(filename); + + util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data", NULL); + dir = opendir(filename); + if (dir != NULL) { + cleanup_dir(dir, S_ISVTX, 1); + closedir(dir); + } + + util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/links", NULL); + dir = opendir(filename); + if (dir != NULL) { + cleanup_dir(dir, 0, 2); + closedir(dir); + } + + util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/tags", NULL); + dir = opendir(filename); + if (dir != NULL) { + cleanup_dir(dir, 0, 2); + closedir(dir); + } + + util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/watch", NULL); + dir = opendir(filename); + if (dir != NULL) { + cleanup_dir(dir, 0, 1); + closedir(dir); + } + + util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/firmware-missing", NULL); + dir = opendir(filename); + 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; + + dbg(udev, "option '%c'\n", option); + switch (option) { + case 'n': + if (device != NULL) { + fprintf(stderr, "device already specified\n"); + rc = 2; + goto exit; + } + /* remove /dev if given */ + if (strncmp(optarg, udev_get_dev_path(udev), strlen(udev_get_dev_path(udev))) != 0) + util_strscpyl(name, sizeof(name), udev_get_dev_path(udev), "/", 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 (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) + util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), 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("%s\n", udev_get_run_path(udev)); + 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 { + size_t len = strlen(udev_get_dev_path(udev)); + + printf("%s\n", &udev_device_get_devnode(device)[len+1]); + } + 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 { + size_t len; + + len = strlen(udev_get_dev_path(udev_device_get_udev(device))); + printf("%s", &udev_list_entry_get_name(list_entry)[len+1]); + } + 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("%s\n", udev_get_dev_path(udev)); + 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", +}; |