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Diffstat (limited to 'src/grp-udev/udevadm/udevadm-info.c')
-rw-r--r--src/grp-udev/udevadm/udevadm-info.c481
1 files changed, 481 insertions, 0 deletions
diff --git a/src/grp-udev/udevadm/udevadm-info.c b/src/grp-udev/udevadm/udevadm-info.c
new file mode 100644
index 0000000000..38233de223
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-info.c
@@ -0,0 +1,481 @@
+/*
+ * 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 <ctype.h>
+#include <dirent.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 "systemd-basic/fd-util.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-shared/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_unref_ 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_unref_ 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;
+
+ 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)) {
+ _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"
+ " --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':
+ 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':
+ 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)
+ 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",
+};
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