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-rw-r--r--udev/udevinfo.c500
1 files changed, 500 insertions, 0 deletions
diff --git a/udev/udevinfo.c b/udev/udevinfo.c
new file mode 100644
index 0000000000..b9ee17c4f1
--- /dev/null
+++ b/udev/udevinfo.c
@@ -0,0 +1,500 @@
+/*
+ * Copyright (C) 2004-2006 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 version 2 of the License.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#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 <sys/stat.h>
+#include <sys/types.h>
+
+#include "udev.h"
+
+static void print_all_attributes(const char *devpath, const char *key)
+{
+ char path[PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
+
+ strlcpy(path, sysfs_path, sizeof(path));
+ strlcat(path, devpath, sizeof(path));
+
+ dir = opendir(path);
+ if (dir != NULL) {
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ struct stat statbuf;
+ char filename[PATH_SIZE];
+ char *attr_value;
+ char value[NAME_SIZE];
+ size_t len;
+
+ if (dent->d_name[0] == '.')
+ continue;
+
+ if (strcmp(dent->d_name, "uevent") == 0)
+ continue;
+ if (strcmp(dent->d_name, "dev") == 0)
+ continue;
+
+ strlcpy(filename, path, sizeof(filename));
+ strlcat(filename, "/", sizeof(filename));
+ strlcat(filename, dent->d_name, sizeof(filename));
+ if (lstat(filename, &statbuf) != 0)
+ continue;
+ if (S_ISLNK(statbuf.st_mode))
+ continue;
+
+ attr_value = sysfs_attr_get_value(devpath, dent->d_name);
+ if (attr_value == NULL)
+ continue;
+ len = strlcpy(value, attr_value, sizeof(value));
+ if(len >= sizeof(value))
+ len = sizeof(value) - 1;
+ dbg("attr '%s'='%s'(%zi)\n", dent->d_name, value, len);
+
+ /* remove trailing newlines */
+ while (len && value[len-1] == '\n')
+ value[--len] = '\0';
+
+ /* skip nonprintable attributes */
+ while (len && isprint(value[len-1]))
+ len--;
+ if (len) {
+ dbg("attribute value of '%s' non-printable, skip\n", dent->d_name);
+ continue;
+ }
+
+ printf(" %s{%s}==\"%s\"\n", key, dent->d_name, value);
+ }
+ }
+ printf("\n");
+}
+
+static int print_device_chain(const char *devpath)
+{
+ struct sysfs_device *dev;
+
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL)
+ return -1;
+
+ printf("\n"
+ "Udevinfo 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", dev->devpath);
+ printf(" KERNEL==\"%s\"\n", dev->kernel);
+ printf(" SUBSYSTEM==\"%s\"\n", dev->subsystem);
+ printf(" DRIVER==\"%s\"\n", dev->driver);
+ print_all_attributes(dev->devpath, "ATTR");
+
+ /* walk up the chain of devices */
+ while (1) {
+ dev = sysfs_device_get_parent(dev);
+ if (dev == NULL)
+ break;
+ printf(" looking at parent device '%s':\n", dev->devpath);
+ printf(" KERNELS==\"%s\"\n", dev->kernel);
+ printf(" SUBSYSTEMS==\"%s\"\n", dev->subsystem);
+ printf(" DRIVERS==\"%s\"\n", dev->driver);
+
+ print_all_attributes(dev->devpath, "ATTRS");
+ }
+
+ return 0;
+}
+
+static void print_record(struct udevice *udev)
+{
+ struct name_entry *name_loop;
+
+ printf("P: %s\n", udev->dev->devpath);
+ printf("N: %s\n", udev->name);
+ list_for_each_entry(name_loop, &udev->symlink_list, node)
+ printf("S: %s\n", name_loop->name);
+ if (udev->link_priority != 0)
+ printf("L: %i\n", udev->link_priority);
+ if (udev->partitions != 0)
+ printf("A:%u\n", udev->partitions);
+ if (udev->ignore_remove)
+ printf("R:%u\n", udev->ignore_remove);
+ list_for_each_entry(name_loop, &udev->env_list, node)
+ printf("E: %s\n", name_loop->name);
+}
+
+static void export_db(void) {
+ LIST_HEAD(name_list);
+ struct name_entry *name_loop;
+
+ udev_db_get_all_entries(&name_list);
+ list_for_each_entry(name_loop, &name_list, node) {
+ struct udevice *udev_db;
+
+ udev_db = udev_device_init(NULL);
+ if (udev_db == NULL)
+ continue;
+ if (udev_db_get_device(udev_db, name_loop->name) == 0)
+ print_record(udev_db);
+ printf("\n");
+ udev_device_cleanup(udev_db);
+ }
+ name_list_cleanup(&name_list);
+}
+
+static int lookup_device_by_name(struct udevice *udev, const char *name)
+{
+ LIST_HEAD(name_list);
+ int count;
+ struct name_entry *device;
+ int rc = -1;
+
+ count = udev_db_get_devices_by_name(name, &name_list);
+ if (count <= 0)
+ goto out;
+
+ info("found %i devices for '%s'\n", count, name);
+
+ /* select the device that seems to match */
+ list_for_each_entry(device, &name_list, node) {
+ char filename[PATH_SIZE];
+ struct stat statbuf;
+
+ udev_device_init(udev);
+ if (udev_db_get_device(udev, device->name) != 0)
+ continue;
+ info("found db entry '%s'\n", device->name);
+
+ /* make sure, we don't get a link of a differnt device */
+ strlcpy(filename, udev_root, sizeof(filename));
+ strlcat(filename, "/", sizeof(filename));
+ strlcat(filename, name, sizeof(filename));
+ if (stat(filename, &statbuf) != 0)
+ continue;
+ if (major(udev->devt) > 0 && udev->devt != statbuf.st_rdev) {
+ info("skip '%s', dev_t doesn't match\n", udev->name);
+ continue;
+ }
+ rc = 0;
+ break;
+ }
+out:
+ name_list_cleanup(&name_list);
+ return rc;
+}
+
+static int stat_device(const char *name, int 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;
+}
+
+int udevinfo(int argc, char *argv[], char *envp[])
+{
+ int option;
+ struct udevice *udev;
+ int root = 0;
+ int export = 0;
+ const char *export_prefix = NULL;
+
+ static const struct option options[] = {
+ { "name", 1, NULL, 'n' },
+ { "path", 1, NULL, 'p' },
+ { "query", 1, NULL, 'q' },
+ { "attribute-walk", 0, NULL, 'a' },
+ { "export-db", 0, NULL, 'e' },
+ { "root", 0, NULL, 'r' },
+ { "device-id-of-file", 1, NULL, 'd' },
+ { "export", 0, NULL, 'x' },
+ { "export-prefix", 1, NULL, 'P' },
+ { "version", 0, NULL, 1 }, /* -V outputs braindead format */
+ { "help", 0, 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_ENV,
+ QUERY_ALL,
+ } query = QUERY_NONE;
+
+ char path[PATH_SIZE] = "";
+ char name[PATH_SIZE] = "";
+ struct name_entry *name_loop;
+ int rc = 0;
+
+ logging_init("udevinfo");
+ udev_config_init();
+ sysfs_init();
+
+ udev = udev_device_init(NULL);
+ if (udev == NULL) {
+ rc = 1;
+ goto exit;
+ }
+
+ while (1) {
+ option = getopt_long(argc, argv, "aed:n:p:q:rxPVh", options, NULL);
+ if (option == -1)
+ break;
+
+ dbg("option '%c'\n", option);
+ switch (option) {
+ case 'n':
+ /* remove /dev if given */
+ if (strncmp(optarg, udev_root, strlen(udev_root)) == 0)
+ strlcpy(name, &optarg[strlen(udev_root)+1], sizeof(name));
+ else
+ strlcpy(name, optarg, sizeof(name));
+ remove_trailing_chars(name, '/');
+ dbg("name: %s\n", name);
+ break;
+ case 'p':
+ /* remove /sys if given */
+ if (strncmp(optarg, sysfs_path, strlen(sysfs_path)) == 0)
+ strlcpy(path, &optarg[strlen(sysfs_path)], sizeof(path));
+ else
+ strlcpy(path, optarg, sizeof(path));
+ remove_trailing_chars(path, '/');
+
+ /* possibly resolve to real devpath */
+ if (sysfs_resolve_link(path, sizeof(path)) != 0) {
+ char temp[PATH_SIZE];
+ char *pos;
+
+ /* also check if the parent is a link */
+ strlcpy(temp, path, sizeof(temp));
+ pos = strrchr(temp, '/');
+ if (pos != 0) {
+ char tail[PATH_SIZE];
+
+ strlcpy(tail, pos, sizeof(tail));
+ pos[0] = '\0';
+ if (sysfs_resolve_link(temp, sizeof(temp)) == 0) {
+ strlcpy(path, temp, sizeof(path));
+ strlcat(path, tail, sizeof(path));
+ }
+ }
+ }
+ dbg("path: %s\n", path);
+ break;
+ case 'q':
+ action = ACTION_QUERY;
+ if (strcmp(optarg, "name") == 0) {
+ query = QUERY_NAME;
+ break;
+ }
+ if (strcmp(optarg, "symlink") == 0) {
+ query = QUERY_SYMLINK;
+ break;
+ }
+ if (strcmp(optarg, "path") == 0) {
+ query = QUERY_PATH;
+ break;
+ }
+ if (strcmp(optarg, "env") == 0) {
+ query = QUERY_ENV;
+ break;
+ }
+ if (strcmp(optarg, "all") == 0) {
+ query = QUERY_ALL;
+ break;
+ }
+ fprintf(stderr, "unknown query type\n");
+ rc = 2;
+ goto exit;
+ case 'r':
+ if (action == ACTION_NONE)
+ action = ACTION_ROOT;
+ root = 1;
+ break;
+ case 'd':
+ action = ACTION_DEVICE_ID_FILE;
+ strlcpy(name, optarg, sizeof(name));
+ break;
+ case 'a':
+ action = ACTION_ATTRIBUTE_WALK;
+ break;
+ case 'e':
+ export_db();
+ goto exit;
+ case 'x':
+ export = 1;
+ break;
+ case 'P':
+ export_prefix = optarg;
+ break;
+ case 1:
+ printf("%s\n", UDEV_VERSION);
+ goto exit;
+ case 'V':
+ printf("udevinfo, version %s\n", UDEV_VERSION);
+ goto exit;
+ case 'h':
+ printf("Usage: udevadm info OPTIONS\n"
+ " --query=<type> query database for the specified value:\n"
+ " name name of device node\n"
+ " symlink pointing to node\n"
+ " path sysfs device path\n"
+ " env the device related imported environment\n"
+ " all all values\n"
+ " --path=<devpath> sysfs device path used for query or chain\n"
+ " --name=<name> node or symlink name used for query\n"
+ " --root prepend to query result or print udev_root\n"
+ " --attribute-walk print all key matches while walking along chain\n"
+ " of parent devices\n"
+ " --device-id-of-file=<file> print major/minor of underlying device\n"
+ " --export-db export the content of the udev database\n"
+ " --help print this text\n"
+ "\n");
+ goto exit;
+ default:
+ goto exit;
+ }
+ }
+
+ /* run action */
+ switch (action) {
+ case ACTION_QUERY:
+ /* needs devpath or node/symlink name for query */
+ if (path[0] != '\0') {
+ if (udev_db_get_device(udev, path) != 0) {
+ fprintf(stderr, "no record for '%s' in database\n", path);
+ rc = 3;
+ goto exit;
+ }
+ } else if (name[0] != '\0') {
+ if (lookup_device_by_name(udev, name) != 0) {
+ fprintf(stderr, "node name not found\n");
+ rc = 4;
+ goto exit;
+ }
+ } else {
+ fprintf(stderr, "query needs --path or node --name specified\n");
+ rc = 4;
+ goto exit;
+ }
+
+ switch(query) {
+ case QUERY_NAME:
+ if (root)
+ printf("%s/%s\n", udev_root, udev->name);
+ else
+ printf("%s\n", udev->name);
+ break;
+ case QUERY_SYMLINK:
+ list_for_each_entry(name_loop, &udev->symlink_list, node) {
+ char c = name_loop->node.next != &udev->symlink_list ? ' ' : '\n';
+
+ if (root)
+ printf("%s/%s%c", udev_root, name_loop->name, c);
+ else
+ printf("%s%c", name_loop->name, c);
+ }
+ break;
+ case QUERY_PATH:
+ printf("%s\n", udev->dev->devpath);
+ goto exit;
+ case QUERY_ENV:
+ list_for_each_entry(name_loop, &udev->env_list, node)
+ printf("%s\n", name_loop->name);
+ break;
+ case QUERY_ALL:
+ print_record(udev);
+ break;
+ default:
+ fprintf(stderr, "unknown query type\n");
+ break;
+ }
+ break;
+ case ACTION_ATTRIBUTE_WALK:
+ if (path[0] != '\0') {
+ if (print_device_chain(path) != 0) {
+ fprintf(stderr, "no valid sysfs device found\n");
+ rc = 4;
+ goto exit;
+ }
+ } else if (name[0] != '\0') {
+ if (lookup_device_by_name(udev, name) != 0) {
+ fprintf(stderr, "node name not found\n");
+ rc = 4;
+ goto exit;
+ }
+ if (print_device_chain(udev->dev->devpath) != 0) {
+ fprintf(stderr, "no valid sysfs device found\n");
+ rc = 4;
+ goto exit;
+ }
+ } else {
+ fprintf(stderr, "attribute walk needs --path or node --name specified\n");
+ rc = 5;
+ goto exit;
+ }
+ break;
+ case ACTION_DEVICE_ID_FILE:
+ if (stat_device(name, export, export_prefix) != 0)
+ rc = 6;
+ break;
+ case ACTION_ROOT:
+ printf("%s\n", udev_root);
+ break;
+ default:
+ fprintf(stderr, "missing option\n");
+ rc = 1;
+ break;
+ }
+
+exit:
+ udev_device_cleanup(udev);
+ sysfs_cleanup();
+ logging_close();
+ return rc;
+}
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