/*
- * udevinfo - fetches attributes for a device
- *
- * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * udevinfo.c - fetches stored device information or sysfs attributes
*
+ * Copyright (C) 2004-2005 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
#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 "libsysfs/sysfs/libsysfs.h"
-#include "libsysfs/dlist.h"
#include "udev.h"
-#include "udev_version.h"
-#include "logging.h"
-#include "udevdb.h"
-
-
-# define SYSFS_VALUE_MAX 200
-char **main_argv;
-int main_argc;
-#ifdef LOG
-unsigned char logname[42];
-void log_message (int level, const char *format, ...)
+#ifdef USE_LOG
+void log_message (int priority, const char *format, ...)
{
va_list args;
+ if (priority > udev_log_priority)
+ return;
+
va_start(args, format);
- vsyslog(level, format, args);
+ vsyslog(priority, format, args);
va_end(args);
}
#endif
-static int print_all_attributes(const char *path)
+static void print_all_attributes(const char *devpath)
{
- 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) {
- strfieldcpy(value, attr->value);
- len = strlen(value);
- if (len == 0)
+ 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)) {
+ char *attr_value;
+ char value[NAME_SIZE];
+ size_t len;
+
+ attr_value = sysfs_attr_get_value(devpath, dent->d_name);
+ if (attr_value == NULL)
continue;
+ len = strlcpy(value, attr_value, sizeof(value));
+ dbg("attr '%s'='%s'(%zi)", dent->d_name, value, len);
- /* remove trailing newline */
- if (value[len-1] == '\n') {
- value[len-1] = '\0';
- len--;
- }
+ /* remove trailing newlines */
+ while (len && value[len-1] == '\n')
+ value[--len] = '\0';
- /* skip nonprintable values */
- while (len) {
- if (isprint(value[len-1]) == 0)
- break;
+ /* skip nonprintable attributes */
+ while (len && isprint(value[len-1]))
len--;
+ if (len) {
+ dbg("attribute value of '%s' non-printable, skip", dent->d_name);
+ continue;
}
- if (len == 0)
- printf(" SYSFS{%s}=\"%s\"\n", attr->name, value);
+
+ replace_untrusted_chars(value);
+ printf(" SYSFS{%s}==\"%s\"\n", dent->d_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)
+static int print_device_chain(const char *devpath)
{
- 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;
-}
+ struct sysfs_device *dev;
+
+ printf("\n"
+ "udevinfo starts with the device the node belongs to and then walks up the\n"
+ "device chain, to print for every device found, all possibly useful attributes\n"
+ "in the udev key format.\n"
+ "Only attributes within one device section may be used together in one rule,\n"
+ "to match the device for which the node will be created.\n"
+ "\n");
-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");
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL)
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;
- }
+ printf(" looking at device '%s':\n", dev->devpath);
+ printf(" KERNEL==\"%s\"\n", dev->kernel_name);
+ printf(" SUBSYSTEM==\"%s\"\n", dev->subsystem);
+ print_all_attributes(dev->devpath);
- /* 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;
+ /* walk up the chain of devices */
+ while (1) {
+ dev = sysfs_device_get_parent(dev);
+ if (dev == NULL)
+ break;
+ printf(" looking at device '%s':\n", dev->devpath);
+ printf(" ID==\"%s\"\n", dev->kernel_name);
+ printf(" BUS==\"%s\"\n", dev->subsystem);
+ printf(" DRIVER==\"%s\"\n", dev->driver);
+
+ print_all_attributes(dev->devpath);
}
- 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);
+ return 0;
+}
- /* open sysfs device directory and print all attributes */
- print_all_attributes(sysfs_dev->path);
+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);
+ list_for_each_entry(name_loop, &udev->env_list, node)
+ printf("E: %s\n", name_loop->name);
+}
- sysfs_dev_parent = sysfs_get_device_parent(sysfs_dev);
- if (sysfs_dev_parent == NULL)
- break;
+static void export_name_devpath(struct udevice *udev) {
+ printf("%s=%s/%s\n", udev->dev->devpath, udev_root, udev->name);
+}
+
+static void export_record(struct udevice *udev) {
+ print_record(udev);
+ printf("\n");
+}
+
+static void export_db(void fnct(struct udevice *udev)) {
+ LIST_HEAD(name_list);
+ struct name_entry *name_loop;
- //sysfs_close_device(sysfs_dev);
- sysfs_dev = sysfs_dev_parent;
+ 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();
+ if (udev_db == NULL)
+ continue;
+ if (udev_db_get_device(udev_db, name_loop->name) == 0)
+ fnct(udev_db);
+ udev_device_cleanup(udev_db);
}
- sysfs_close_device(sysfs_dev);
+ name_list_cleanup(&name_list);
+}
-exit:
- //sysfs_close_class_device(class_dev);
- return retval;
+static void print_help(void)
+{
+ fprintf(stderr, "Usage: udevinfo [-anpqrVh]\n"
+ " -q 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"
+ "\n"
+ " -p PATH sysfs device path used for query or chain\n"
+ " -n NAME node/symlink name used for query\n"
+ "\n"
+ " -r prepend to query result or print udev_root\n"
+ " -a print all SYSFS_attributes along the device chain\n"
+ " -e export the content of the udev database\n"
+ " -V print udev version\n"
+ " -h print this help text\n"
+ "\n");
}
-static int process_options(void)
+int main(int argc, char *argv[], char *envp[])
{
- static const char short_options[] = "adn:p:q:rVh";
+ static const char short_options[] = "aden:p:q:rVh";
int option;
- int retval = 1;
- struct udevice dev;
+ struct udevice *udev;
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];
+
+ enum action_type {
+ ACTION_NONE,
+ ACTION_QUERY,
+ ACTION_ATTRIBUTE_WALK,
+ ACTION_ROOT,
+ } 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] = "";
+ char temp[PATH_SIZE];
+ struct name_entry *name_loop;
char *pos;
+ int rc = 0;
+
+ logging_init("udevinfo");
+
+ udev_config_init();
+ sysfs_init();
+
+ udev = udev_device_init();
+ if (udev == NULL) {
+ rc = 1;
+ goto exit;
+ }
/* get command line options */
while (1) {
- option = getopt(main_argc, main_argv, short_options);
+ option = getopt(argc, argv, short_options);
if (option == -1)
break;
switch (option) {
case 'n':
dbg("udev name: %s\n", optarg);
- strfieldcpy(name, optarg);
+ strlcpy(name, optarg, sizeof(name));
break;
-
case 'p':
dbg("udev path: %s\n", optarg);
- strfieldcpy(path, optarg);
+ /* remove sysfs mountpoint if not given */
+ if (strncmp(optarg, sysfs_path, strlen(sysfs_path)) == 0)
+ strlcpy(path, &optarg[strlen(sysfs_path)], sizeof(path));
+ else
+ strlcpy(path, optarg, sizeof(path));
break;
-
case 'q':
dbg("udev query: %s\n", optarg);
-
+ action = ACTION_QUERY;
if (strcmp(optarg, "name") == 0) {
- query = NAME;
+ query = QUERY_NAME;
break;
}
-
if (strcmp(optarg, "symlink") == 0) {
- query = SYMLINK;
- break;
- }
-
- if (strcmp(optarg, "mode") == 0) {
- query = MODE;
+ query = QUERY_SYMLINK;
break;
}
-
- if (strcmp(optarg, "owner") == 0) {
- query = OWNER;
+ if (strcmp(optarg, "path") == 0) {
+ query = QUERY_PATH;
break;
}
-
- if (strcmp(optarg, "group") == 0) {
- query = GROUP;
+ if (strcmp(optarg, "env") == 0) {
+ query = QUERY_ENV;
break;
}
-
- if (strcmp(optarg, "path") == 0) {
- query = PATH;
+ if (strcmp(optarg, "all") == 0) {
+ query = QUERY_ALL;
break;
}
-
- printf("unknown query type\n");
- exit(1);
-
+ fprintf(stderr, "unknown query type\n");
+ rc = 2;
+ goto exit;
case 'r':
+ if (action == ACTION_NONE)
+ action = ACTION_ROOT;
root = 1;
break;
-
case 'a':
- attributes = 1;
+ action = ACTION_ATTRIBUTE_WALK;
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);
-
+ export_db(export_name_devpath);
+ goto exit;
+ case 'e':
+ export_db(export_record);
+ goto exit;
case 'V':
printf("udevinfo, version %s\n", UDEV_VERSION);
- exit(0);
-
+ goto exit;
case 'h':
- retval = 0;
case '?':
default:
- goto help;
+ print_help();
+ goto exit;
}
}
- /* process options */
- if (query != NONE) {
- retval = udevdb_open_ro();
- if (retval != 0) {
- printf("unable to open udev database\n");
- return -EACCES;
- }
-
+ /* run action */
+ switch (action) {
+ case ACTION_QUERY:
+ /* need devpath or node/symlink name for query */
if (path[0] != '\0') {
/* remove sysfs_path if given */
if (strncmp(path, sysfs_path, strlen(sysfs_path)) == 0) {
} else {
if (path[0] != '/') {
/* prepend '/' if missing */
- strfieldcat(temp, "/");
- strfieldcat(temp, path);
+ strcpy(temp, "/");
+ strlcpy(temp, path, sizeof(temp));
pos = temp;
} else {
pos = path;
}
}
- retval = udevdb_get_dev(pos, &dev);
- if (retval != 0) {
- printf("device not found in database\n");
+ if (udev_db_get_device(udev, pos) != 0) {
+ fprintf(stderr, "no record for '%s' in database\n", pos);
+ rc = 3;
goto exit;
}
- goto print;
- }
+ } else if (name[0] != '\0') {
+ char devpath[PATH_SIZE];
+ int len;
- if (name[0] != '\0') {
/* remove udev_root if given */
- if (strncmp(name, udev_root, strlen(udev_root)) == 0) {
- pos = name + strlen(udev_root);
+ len = strlen(udev_root);
+ if (strncmp(name, udev_root, len) == 0) {
+ pos = &name[len+1];
} else
pos = name;
- retval = udevdb_get_dev_byname(pos, path, &dev);
- if (retval != 0) {
- printf("device not found in database\n");
+
+ if (udev_db_lookup_name(pos, devpath, sizeof(devpath)) != 0) {
+ fprintf(stderr, "no record for '%s' in database\n", pos);
+ rc = 3;
goto exit;
}
- goto print;
+ udev_db_get_device(udev, devpath);
+ } else {
+ fprintf(stderr, "query needs device path(-p) or node name(-n) specified\n");
+ rc = 4;
+ goto exit;
}
- printf("query needs device path(-p) or node name(-n) specified\n");
- goto exit;
-
-print:
switch(query) {
- case NAME:
+ case QUERY_NAME:
if (root)
- strfieldcpy(result, udev_root);
- strfieldcat(result, dev.name);
+ printf("%s/%s\n", udev_root, udev->name);
+ else
+ printf("%s\n", udev->name);
break;
-
- case SYMLINK:
- strfieldcpy(result, dev.symlink);
- break;
-
- case MODE:
- sprintf(result, "%#o", dev.mode);
+ case QUERY_SYMLINK:
+ if (list_empty(&udev->symlink_list))
+ goto exit;
+ if (root)
+ list_for_each_entry(name_loop, &udev->symlink_list, node)
+ printf("%s/%s ", udev_root, name_loop->name);
+ else
+ list_for_each_entry(name_loop, &udev->symlink_list, node)
+ printf("%s ", name_loop->name);
+ printf("\n");
break;
-
- case GROUP:
- strfieldcpy(result, dev.group);
+ 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 OWNER:
- strfieldcpy(result, dev.owner);
+ case QUERY_ALL:
+ print_record(udev);
break;
-
- case PATH:
- strfieldcpy(result, path);
- break;
-
default:
- goto exit;
+ print_help();
+ break;
}
- printf("%s\n", result);
-
-exit:
- udevdb_exit();
- return retval;
- }
-
- if (attributes) {
+ break;
+ case ACTION_ATTRIBUTE_WALK:
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);
- strfieldcat(path, temp);
- }
+ fprintf(stderr, "attribute walk on device chain needs path(-p) specified\n");
+ rc = 4;
+ goto exit;
+ } else
print_device_chain(path);
- return 0;
- }
- }
-
- if (root) {
+ break;
+ case ACTION_ROOT:
printf("%s\n", udev_root);
- return 0;
+ break;
+ default:
+ print_help();
+ rc = 1;
+ break;
}
-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 SYSFS_attributes along the device chain\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;
-
- init_logging("udevinfo");
-
- /* initialize our configuration */
- udev_init_config();
-
- retval = process_options();
- if (retval != 0)
- exit(1);
- exit(0);
+exit:
+ udev_device_cleanup(udev);
+ sysfs_cleanup();
+ logging_close();
+ return rc;
}
~ianmdlvl / elogind.git / blobdiff