+
+static int process_options(void)
+{
+ static const char short_options[] = "adn:p:q:rVh";
+ int option;
+ int retval = 1;
+ struct udevice dev;
+ int root = 0;
+ int attributes = 0;
+ enum query_type query = NONE;
+ char result[NAME_SIZE] = "";
+ char path[NAME_SIZE] = "";
+ char name[NAME_SIZE] = "";
+ char temp[NAME_SIZE];
+ char *pos;
+
+ /* get command line options */
+ while (1) {
+ option = getopt(main_argc, main_argv, short_options);
+ if (option == -1)
+ break;
+
+ dbg("option '%c'", option);
+ switch (option) {
+ case 'n':
+ dbg("udev name: %s\n", optarg);
+ strfieldcpy(name, optarg);
+ break;
+
+ case 'p':
+ dbg("udev path: %s\n", optarg);
+ strfieldcpy(path, optarg);
+ break;
+
+ case 'q':
+ dbg("udev query: %s\n", optarg);
+
+ if (strcmp(optarg, "name") == 0) {
+ query = NAME;
+ break;
+ }
+
+ if (strcmp(optarg, "symlink") == 0) {
+ query = SYMLINK;
+ break;
+ }
+
+ if (strcmp(optarg, "mode") == 0) {
+ query = MODE;
+ break;
+ }
+
+ if (strcmp(optarg, "owner") == 0) {
+ query = OWNER;
+ break;
+ }
+
+ if (strcmp(optarg, "group") == 0) {
+ query = GROUP;
+ break;
+ }
+
+ if (strcmp(optarg, "path") == 0) {
+ query = PATH;
+ break;
+ }
+
+ printf("unknown query type\n");
+ exit(1);
+
+ case 'r':
+ root = 1;
+ break;
+
+ case 'a':
+ attributes = 1;
+ break;
+
+ case 'd':
+ retval = udevdb_open_ro();
+ if (retval != 0) {
+ printf("unable to open udev database\n");
+ exit(2);
+ }
+ udevdb_call_foreach(print_record);
+ udevdb_exit();
+ exit(0);
+
+ case 'V':
+ printf("udev, version %s\n", UDEV_VERSION);
+ exit(0);
+
+ case 'h':
+ retval = 0;
+ case '?':
+ default:
+ goto help;
+ }
+ }
+
+ /* process options */
+ if (query != NONE) {
+ retval = udevdb_open_ro();
+ if (retval != 0) {
+ printf("unable to open udev database\n");
+ return -EACCES;
+ }
+
+ if (path[0] != '\0') {
+ /* remove sysfs_path if given */
+ if (strncmp(path, sysfs_path, strlen(sysfs_path)) == 0) {
+ pos = path + strlen(sysfs_path);
+ } else {
+ if (path[0] != '/') {
+ /* prepend '/' if missing */
+ strcat(temp, "/");
+ strncat(temp, path, sizeof(path));
+ pos = temp;
+ } else {
+ pos = path;
+ }
+ }
+ retval = udevdb_get_dev(pos, &dev);
+ if (retval != 0) {
+ printf("device not found in database\n");
+ goto exit;
+ }
+ goto print;
+ }
+
+ if (name[0] != '\0') {
+ /* remove udev_root if given */
+ if (strncmp(name, udev_root, strlen(udev_root)) == 0) {
+ pos = name + strlen(udev_root);
+ } else
+ pos = name;
+ retval = udevdb_get_dev_byname(pos, path, &dev);
+ if (retval != 0) {
+ printf("device not found in database\n");
+ goto exit;
+ }
+ goto print;
+ }
+
+ printf("query needs device path(-p) or node name(-n) specified\n");
+ goto exit;
+
+print:
+ switch(query) {
+ case NAME:
+ if (root)
+ strfieldcpy(result, udev_root);
+ strncat(result, dev.name, sizeof(result));
+ break;
+
+ case SYMLINK:
+ strfieldcpy(result, dev.symlink);
+ break;
+
+ case MODE:
+ sprintf(result, "%#o", dev.mode);
+ break;
+
+ case GROUP:
+ strfieldcpy(result, dev.group);
+ break;
+
+ case OWNER:
+ strfieldcpy(result, dev.owner);
+ break;
+
+ case PATH:
+ strfieldcpy(result, path);
+ break;
+
+ default:
+ goto exit;
+ }
+ printf("%s\n", result);
+
+exit:
+ udevdb_exit();
+ return retval;
+ }
+
+ if (attributes) {
+ if (path[0] == '\0') {
+ printf("attribute walk on device chain needs path(-p) specified\n");
+ return -EINVAL;
+ } else {
+ if (strncmp(path, sysfs_path, strlen(sysfs_path)) != 0) {
+ /* prepend sysfs mountpoint if not given */
+ strfieldcpy(temp, path);
+ strfieldcpy(path, sysfs_path);
+ strncat(path, temp, sizeof(path));
+ }
+ print_device_chain(path);
+ return 0;
+ }
+ }
+
+ if (root) {
+ printf("%s\n", udev_root);
+ return 0;
+ }
+
+help:
+ printf("Usage: [-anpqrdVh]\n"
+ " -q TYPE query database for the specified value:\n"
+ " 'name' name of device node\n"
+ " 'symlink' pointing to node\n"
+ " 'mode' permissions of node\n"
+ " 'owner' of node\n"
+ " 'group' of node\n"
+ " 'path' sysfs device path\n"
+ " -p PATH sysfs device path used for query or chain\n"
+ " -n NAME node name used for query\n"
+ "\n"
+ " -r print udev root\n"
+ " -a print all attributes along the chain of the device\n"
+ " -d dump whole database\n"
+ " -V print udev version\n"
+ " -h print this help text\n"
+ "\n");
+ return retval;
+}
+
+int main(int argc, char *argv[], char *envp[])
+{
+ int retval;
+
+ main_argv = argv;
+ main_argc = argc;
+ main_envp = envp;
+
+ /* initialize our configuration */
+ udev_init_config();
+
+ retval = process_options();
+ if (retval != 0)
+ exit(1);
+ exit(0);
+}