/*
- * 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_lib.h"
-#include "udev_version.h"
-#include "udev_db.h"
-#include "logging.h"
-
-#define SYSFS_VALUE_SIZE 256
-#ifdef LOG
-unsigned char logname[LOGNAME_SIZE];
-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_SIZE];
- 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;
}
-static int print_record(struct udevice *udev)
+static int print_device_chain(const char *devpath)
{
- printf("P: %s\n", udev->devpath);
- printf("N: %s\n", udev->name);
- printf("S: %s\n", udev->symlink);
- printf("\n");
- return 0;
-}
+ struct sysfs_device *dev;
-enum query_type {
- NONE,
- NAME,
- PATH,
- SYMLINK,
- ALL
-};
-
-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;
- }
-
- printf("\nudevinfo starts with the device the node belongs to and then walks up the\n"
+ 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");
- /* look for the 'dev' file */
- attr = sysfs_get_classdev_attr(class_dev, "dev");
- if (attr != NULL)
- printf("device '%s' has major:minor %s", class_dev->path, attr->value);
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL)
+ return -1;
- /* 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_dev = sysfs_get_classdev_device(class_dev_parent);
- else
- 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)
+ /* 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);
- sysfs_dev = sysfs_dev_parent;
+ print_all_attributes(dev->devpath);
}
-exit:
- sysfs_close_class_device(class_dev);
- return retval;
+ return 0;
}
-/* print all class/main block devices with major/minor, physical device, driver and bus */
-static int print_sysfs_devices(void)
+static void print_record(struct udevice *udev)
{
- struct dlist *subsyslist;
- char *class;
-
- subsyslist = sysfs_open_subsystem_list("class");
- if (!subsyslist)
- return -1;
-
- dlist_for_each_data(subsyslist, class, char) {
- struct sysfs_class *cls;
- struct dlist *class_devices;
- struct sysfs_class_device *class_dev;
- struct sysfs_device *phys_dev;
- unsigned int major, minor;
+ struct name_entry *name_loop;
- cls = sysfs_open_class(class);
- if (!cls)
- continue;
+ 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);
+}
- class_devices = sysfs_get_class_devices(cls);
- if (!class_devices)
- continue;
+static void export_name_devpath(struct udevice *udev) {
+ printf("%s=%s/%s\n", udev->dev->devpath, udev_root, udev->name);
+}
- dlist_for_each_data(class_devices, class_dev, struct sysfs_class_device) {
- struct sysfs_attribute *attr;
+static void export_record(struct udevice *udev) {
+ print_record(udev);
+ printf("\n");
+}
- printf("\n");
- printf("DEVPATH '%s'\n", class_dev->path);
- printf("SUBSYSTEM '%s'\n", class_dev->classname);
-
- attr = sysfs_get_classdev_attr(class_dev, "dev");
- if (attr) {
- sscanf(attr->value, "%u:%u", &major, &minor);
- printf("MAJOR %u\n", minor);
- printf("MINOR %u\n", major);
- }
+static void export_db(void fnct(struct udevice *udev)) {
+ LIST_HEAD(name_list);
+ struct name_entry *name_loop;
- phys_dev = sysfs_get_classdev_device(class_dev);
- if (phys_dev) {
- printf("PHYSDEVPATH '%s'\n", phys_dev->path);
- if (phys_dev->bus[0] != '\0')
- printf("PHYSDEVBUS '%s'\n", phys_dev->bus);
+ udev_db_get_all_entries(&name_list);
+ list_for_each_entry(name_loop, &name_list, node) {
+ struct udevice *udev_db;
- if (phys_dev->driver_name[0] != '\0')
- printf("PHYSDEVDRIVER '%s'\n", phys_dev->driver_name);
- }
- }
- sysfs_close_class(cls);
+ 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_list(subsyslist);
+ name_list_cleanup(&name_list);
+}
- return 0;
+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(int argc, char *argv[])
+int main(int argc, char *argv[], char *envp[])
{
- static const char short_options[] = "adn:p:q:rsVh";
+ static const char short_options[] = "aden:p:q:rVh";
int option;
- int retval = 1;
- struct udevice udev;
+ struct udevice *udev;
int root = 0;
- int attributes = 0;
- enum query_type query = NONE;
- char result[1024] = "";
- 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) {
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;
+ query = QUERY_SYMLINK;
break;
}
-
if (strcmp(optarg, "path") == 0) {
- query = PATH;
+ query = QUERY_PATH;
+ break;
+ }
+ if (strcmp(optarg, "env") == 0) {
+ query = QUERY_ENV;
break;
}
-
if (strcmp(optarg, "all") == 0) {
- query = ALL;
+ 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 's':
- print_sysfs_devices();
- exit(0);
-
case 'a':
- attributes = 1;
+ action = ACTION_ATTRIBUTE_WALK;
break;
-
+ case 'd':
+ 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) {
+ /* 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;
}
}
- memset(&udev, 0x00, sizeof(struct udevice));
- strfieldcpy(udev.devpath, pos);
- retval = udev_db_get_device(&udev);
- 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 */
- int len = strlen(udev_root);
-
+ len = strlen(udev_root);
if (strncmp(name, udev_root, len) == 0) {
pos = &name[len+1];
} else
pos = name;
- memset(&udev, 0x00, sizeof(struct udevice));
- strfieldcpy(udev.name, pos);
- retval = udev_db_get_device_byname(&udev, pos);
- 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:
- if (root) {
- snprintf(result, NAME_SIZE-1, "%s/%s", udev_root, udev.name);
- result[NAME_SIZE-1] = '\0';
- } else {
- strfieldcpy(result, udev.name);
- }
- break;
-
- case SYMLINK:
- if (root) {
- int slen;
- char *spos;
- char slink[NAME_SIZE];
-
- pos = result;
- foreach_strpart(udev.symlink, " \n\r", spos, slen) {
- strncpy(slink, spos, slen);
- slink[slen] = '\0';
- pos += sprintf(pos, "%s/%s ", udev_root, slink);
- }
- } else {
- strfieldcpy(result, udev.symlink);
- }
+ case QUERY_NAME:
+ if (root)
+ printf("%s/%s\n", udev_root, udev->name);
+ else
+ printf("%s\n", udev->name);
break;
-
- case PATH:
- strfieldcpy(result, path);
+ 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 ALL:
- print_record(&udev);
+ 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:
- goto exit;
+ print_help();
+ break;
}
- printf("%s\n", result);
-
-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"
- " 'path' sysfs device path\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 print udev root\n"
- " -a print all SYSFS_attributes along the device chain\n"
- " -s print all sysfs devices with major/minor, physical device and bus\n"
- " -V print udev version\n"
- " -h print this help text\n"
- "\n");
- return retval;
-}
-
-int main(int argc, char *argv[], char *envp[])
-{
- int rc = 0;
-
- logging_init("udevinfo");
-
- /* initialize our configuration */
- udev_init_config();
-
- rc = process_options(argc, argv);
-
+exit:
+ udev_device_cleanup(udev);
+ sysfs_cleanup();
logging_close();
- exit(rc);
+ return rc;
}
~ianmdlvl / elogind.git / blobdiff