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-rw-r--r--udevinfo.c424
1 files changed, 424 insertions, 0 deletions
diff --git a/udevinfo.c b/udevinfo.c
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index 0000000000..a2f5601b7c
--- /dev/null
+++ b/udevinfo.c
@@ -0,0 +1,424 @@
+/*
+ * udevinfo - fetches attributes for a device
+ *
+ * Copyright (C) 2004 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "udev.h"
+#include "udev_version.h"
+#include "logging.h"
+#include "udevdb.h"
+#include "libsysfs/libsysfs.h"
+
+
+# define SYSFS_VALUE_MAX 200
+
+char **main_argv;
+int main_argc;
+char **main_envp;
+
+static int print_all_attributes(const char *path)
+{
+ struct dlist *attributes;
+ struct sysfs_attribute *attr;
+ struct sysfs_directory *sysfs_dir;
+ char value[SYSFS_VALUE_MAX];
+ int len;
+ int retval = 0;
+
+ sysfs_dir = sysfs_open_directory(path);
+ if (sysfs_dir == NULL)
+ return -1;
+
+ attributes = sysfs_get_dir_attributes(sysfs_dir);
+ if (attributes == NULL) {
+ retval = -1;
+ goto exit;
+ }
+
+ dlist_for_each_data(attributes, attr, struct sysfs_attribute) {
+ if (attr->value != NULL) {
+ strncpy(value, attr->value, SYSFS_VALUE_MAX);
+ len = strlen(value);
+ if (len == 0)
+ continue;
+
+ /* remove trailing newline */
+ if (value[len-1] == '\n') {
+ value[len-1] = '\0';
+ len--;
+ }
+
+ /* skip nonprintable values */
+ while (len) {
+ if (isprint(value[len-1]) == 0)
+ break;
+ len--;
+ }
+ if (len == 0)
+ printf(" SYSFS_%s=\"%s\"\n", attr->name, value);
+ }
+ }
+ printf("\n");
+
+exit:
+ sysfs_close_directory(sysfs_dir);
+
+ return retval;
+}
+
+/* callback for database dump */
+static int print_record(char *path, struct udevice *dev)
+{
+ printf("P: %s\n", path);
+ printf("N: %s\n", dev->name);
+ printf("M: %#o\n", dev->mode);
+ printf("S: %s\n", dev->symlink);
+ printf("O: %s\n", dev->owner);
+ printf("G: %s\n", dev->group);
+ printf("\n");
+ return 0;
+}
+
+enum query_type {
+ NONE,
+ NAME,
+ PATH,
+ SYMLINK,
+ MODE,
+ OWNER,
+ GROUP
+};
+
+static int print_device_chain(const char *path)
+{
+ struct sysfs_class_device *class_dev;
+ struct sysfs_class_device *class_dev_parent;
+ struct sysfs_attribute *attr;
+ struct sysfs_device *sysfs_dev;
+ struct sysfs_device *sysfs_dev_parent;
+ int retval = 0;
+
+ /* get the class dev */
+ class_dev = sysfs_open_class_device_path(path);
+ if (class_dev == NULL) {
+ printf("couldn't get the class device\n");
+ return -1;
+ }
+
+ /* read the 'dev' file for major/minor*/
+ attr = sysfs_get_classdev_attr(class_dev, "dev");
+ if (attr == NULL) {
+ printf("couldn't get the \"dev\" file\n");
+ retval = -1;
+ goto exit;
+ }
+ printf("\ndevice '%s' has major:minor %s", class_dev->path, attr->value);
+ sysfs_close_attribute(attr);
+
+ /* open sysfs class device directory and print all attributes */
+ printf(" looking at class device '%s':\n", class_dev->path);
+ if (print_all_attributes(class_dev->path) != 0) {
+ printf("couldn't open class device directory\n");
+ retval = -1;
+ goto exit;
+ }
+
+ /* get the device link (if parent exists look here) */
+ class_dev_parent = sysfs_get_classdev_parent(class_dev);
+ if (class_dev_parent != NULL) {
+ //sysfs_close_class_device(class_dev);
+ class_dev = class_dev_parent;
+ }
+ sysfs_dev = sysfs_get_classdev_device(class_dev);
+ if (sysfs_dev != NULL)
+ printf("follow the class device's \"device\"\n");
+
+ /* look the device chain upwards */
+ while (sysfs_dev != NULL) {
+ printf(" looking at the device chain at '%s':\n", sysfs_dev->path);
+ printf(" BUS=\"%s\"\n", sysfs_dev->bus);
+ printf(" ID=\"%s\"\n", sysfs_dev->bus_id);
+
+ /* open sysfs device directory and print all attributes */
+ print_all_attributes(sysfs_dev->path);
+
+ sysfs_dev_parent = sysfs_get_device_parent(sysfs_dev);
+ if (sysfs_dev_parent == NULL)
+ break;
+
+ //sysfs_close_device(sysfs_dev);
+ sysfs_dev = sysfs_dev_parent;
+ }
+ sysfs_close_device(sysfs_dev);
+
+exit:
+ //sysfs_close_class_device(class_dev);
+ return retval;
+}
+
+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("udevinfo, 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);
+}