/*
- * udevinfo.c - fetches attributes for a device
- *
- * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * 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
*
* 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.
+ * 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 "libsysfs/sysfs/libsysfs.h"
-#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "udev_utils.h"
-#include "udev_version.h"
-#include "udev_db.h"
-#include "logging.h"
-
-#ifdef USE_LOG
-void log_message (int priority, const char *format, ...)
+static void print_all_attributes(const char *devpath, const char *key)
{
- va_list args;
-
- if (priority > udev_log_priority)
- return;
+ 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;
+
+ 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)", 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", dent->d_name);
+ continue;
+ }
- va_start(args, format);
- vsyslog(priority, format, args);
- va_end(args);
+ printf(" %s{%s}==\"%s\"\n", key, dent->d_name, value);
+ }
+ }
+ printf("\n");
}
-#endif
-static void print_all_attributes(struct dlist *attr_list)
+static int print_device_chain(const char *devpath)
{
- struct sysfs_attribute *attr;
- char value[VALUE_SIZE];
- size_t len;
+ struct sysfs_device *dev;
- dlist_for_each_data(attr_list, attr, struct sysfs_attribute) {
- if (attr->value == NULL)
- continue;
- len = strlcpy(value, attr->value, sizeof(value));
- if (len >= sizeof(value)) {
- dbg("attribute value of '%s' too long, skip", attr->name);
- continue;
- }
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL)
+ return -1;
- /* 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", attr->name);
- continue;
- }
- replace_untrusted_chars(value);
- printf(" SYSFS{%s}==\"%s\"\n", attr->name, value);
+ 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");
}
- printf("\n");
+
+ return 0;
}
-static int print_record(struct udevice *udev)
+static void print_record(struct udevice *udev)
{
struct name_entry *name_loop;
- printf("P: %s\n", udev->devpath);
+ 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);
+}
- return 0;
+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 print_device_chain(const char *path)
+static int lookup_device_by_name(struct udevice *udev, const char *name)
{
- struct sysfs_class_device *class_dev;
- struct sysfs_class_device *class_dev_parent;
- struct sysfs_attribute *attr;
- struct sysfs_device *sysfs_dev;
- struct dlist *attr_list;
- int retval = 0;
-
- /* get the class dev */
- class_dev = sysfs_open_class_device_path(path);
- if (class_dev == NULL) {
- fprintf(stderr, "couldn't get the class device\n");
- return -1;
- }
+ LIST_HEAD(name_list);
+ int count;
+ struct name_entry *device;
+ int rc = -1;
- printf("\nudevinfo 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");
+ count = udev_db_get_devices_by_name(name, &name_list);
+ if (count <= 0)
+ goto out;
- /* 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);
+ info("found %i devices for '%s'", count, name);
- /* open sysfs class device directory and print all attributes */
- printf(" looking at class device '%s':\n", class_dev->path);
- printf(" SUBSYSTEM==\"%s\"\n", class_dev->classname);
+ /* select the device that seems to match */
+ list_for_each_entry(device, &name_list, node) {
+ char filename[PATH_SIZE];
+ struct stat statbuf;
- attr_list = sysfs_get_classdev_attributes(class_dev);
- if (attr_list == NULL) {
- fprintf(stderr, "couldn't open class device directory\n");
- retval = -1;
- goto exit;
- }
- print_all_attributes(attr_list);
-
- /* 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 \"device\"-link to the physical 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);
- printf(" DRIVER==\"%s\"\n", sysfs_dev->driver_name);
-
- attr_list = sysfs_get_device_attributes(sysfs_dev);
- if (attr_list != NULL)
- print_all_attributes(attr_list);
- else
- printf("\n");
+ udev_device_init(udev);
+ if (udev_db_get_device(udev, device->name) != 0)
+ continue;
+ info("found db entry '%s'", device->name);
- sysfs_dev = sysfs_get_device_parent(sysfs_dev);
- if (sysfs_dev == NULL)
- break;
+ /* 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", udev->name);
+ continue;
+ }
+ rc = 0;
+ break;
}
-
-exit:
- sysfs_close_class_device(class_dev);
- return retval;
+out:
+ name_list_cleanup(&name_list);
+ return rc;
}
-static void dump_names(void) {
- LIST_HEAD(name_list);
- struct name_entry *name_loop;
+static int stat_device(const char *name)
+{
+ struct stat statbuf;
- udev_db_get_all_entries(&name_list);
- list_for_each_entry(name_loop, &name_list, node) {
- struct udevice udev_db;
+ if (stat(name, &statbuf) != 0)
+ return -1;
- udev_init_device(&udev_db, NULL, NULL, NULL);
- if (udev_db_get_device(&udev_db, name_loop->name) == 0)
- printf("%s=%s/%s\n", udev_db.devpath, udev_root, udev_db.name);
- udev_cleanup_device(&udev_db);
- }
- name_list_cleanup(&name_list);
+ printf("%d %d\n", major(statbuf.st_dev), minor(statbuf.st_dev));
+ return 0;
}
-int main(int argc, char *argv[], char *envp[])
+int udevinfo(int argc, char *argv[], char *envp[])
{
- static const char short_options[] = "adn:p:q:rVh";
int option;
- struct udevice udev;
+ struct udevice *udev;
int root = 0;
- int attributes = 0;
+
+ 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' },
+ { "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_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 retval = 0;
+ int rc = 0;
logging_init("udevinfo");
+ udev_config_init();
+ sysfs_init();
- udev_init_config();
- udev_init_device(&udev, NULL, NULL, NULL);
+ udev = udev_device_init(NULL);
+ if (udev == NULL) {
+ rc = 1;
+ goto exit;
+ }
- /* get command line options */
while (1) {
- option = getopt(argc, argv, short_options);
+ option = getopt_long(argc, argv, "aed:n:p:q:rVh", options, NULL);
if (option == -1)
break;
dbg("option '%c'", option);
switch (option) {
case 'n':
- dbg("udev name: %s\n", optarg);
- strlcpy(name, optarg, sizeof(name));
+ /* 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", name);
break;
-
case 'p':
- dbg("udev path: %s\n", optarg);
- strlcpy(path, optarg, sizeof(path));
+ /* 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", path);
break;
-
case 'q':
- dbg("udev query: %s\n", optarg);
-
+ 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");
- retval = 1;
+ 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':
- attributes = 1;
+ action = ACTION_ATTRIBUTE_WALK;
break;
-
- case 'd':
- dump_names();
+ case 'e':
+ export_db();
+ goto exit;
+ case 1:
+ printf("%s\n", UDEV_VERSION);
goto exit;
-
case 'V':
printf("udevinfo, version %s\n", UDEV_VERSION);
goto exit;
-
case 'h':
- retval = 2;
- case '?':
+ 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 help;
+ goto exit;
}
}
- /* process options */
- if (query != QUERY_NONE) {
+ /* run action */
+ switch (action) {
+ case ACTION_QUERY:
+ /* needs 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) {
- pos = path + strlen(sysfs_path);
- } else {
- if (path[0] != '/') {
- /* prepend '/' if missing */
- strcpy(temp, "/");
- strlcpy(temp, path, sizeof(temp));
- pos = temp;
- } else {
- pos = path;
- }
- }
- retval = udev_db_get_device(&udev, pos);
- if (retval != 0) {
- fprintf(stderr, "no record for '%s' in database\n", pos);
+ if (udev_db_get_device(udev, path) != 0) {
+ fprintf(stderr, "no record for '%s' in database\n", path);
+ rc = 3;
goto exit;
}
- goto print;
- }
-
- if (name[0] != '\0') {
- char devpath[PATH_SIZE];
- int len;
-
- /* remove udev_root if given */
- len = strlen(udev_root);
- if (strncmp(name, udev_root, len) == 0) {
- pos = &name[len+1];
- } else
- pos = name;
-
- retval = udev_db_lookup_name(pos, devpath, sizeof(devpath));
- if (retval != 0) {
- fprintf(stderr, "no record for '%s' in database\n", pos);
+ } else if (name[0] != '\0') {
+ if (lookup_device_by_name(udev, name) != 0) {
+ fprintf(stderr, "node name not found\n");
+ rc = 4;
goto exit;
}
- udev_db_get_device(&udev, devpath);
- goto print;
+ } else {
+ fprintf(stderr, "query needs --path or node --name specified\n");
+ rc = 4;
+ goto exit;
}
- fprintf(stderr, "query needs device path(-p) or node name(-n) specified\n");
- retval = 3;
- goto exit;
-
-print:
switch(query) {
case QUERY_NAME:
if (root)
- printf("%s/%s\n", udev_root, udev.name);
+ printf("%s/%s\n", udev_root, udev->name);
else
- printf("%s\n", udev.name);
- goto exit;
+ printf("%s\n", udev->name);
+ break;
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");
- goto exit;
+ 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.devpath);
+ printf("%s\n", udev->dev->devpath);
goto exit;
case QUERY_ENV:
- list_for_each_entry(name_loop, &udev.env_list, node)
+ list_for_each_entry(name_loop, &udev->env_list, node)
printf("%s\n", name_loop->name);
- goto exit;
+ break;
case QUERY_ALL:
- print_record(&udev);
- goto exit;
+ print_record(udev);
+ break;
default:
- goto help;
+ fprintf(stderr, "unknown query type\n");
+ break;
}
- }
-
- if (attributes) {
- if (path[0] == '\0') {
- fprintf(stderr, "attribute walk on device chain needs path(-p) specified\n");
- retval = 4;
- goto exit;
- } else {
- if (strncmp(path, sysfs_path, strlen(sysfs_path)) != 0) {
- /* prepend sysfs mountpoint if not given */
- snprintf(temp, sizeof(temp), "%s%s", sysfs_path, path);
- temp[sizeof(temp)-1] = '\0';
- strlcpy(path, temp, sizeof(temp));
+ 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;
}
- print_device_chain(path);
+ 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;
}
- }
-
- if (root) {
+ break;
+ case ACTION_DEVICE_ID_FILE:
+ if (stat_device(name) != 0)
+ rc = 6;
+ break;
+ case ACTION_ROOT:
printf("%s\n", udev_root);
- goto exit;
+ break;
+ default:
+ fprintf(stderr, "missing option\n");
+ rc = 1;
+ break;
}
-help:
- 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 print udev root\n"
- " -a print all SYSFS_attributes along the device chain\n"
- " -d print the relationship of devpath and the node name for all\n"
- " devices available in the database\n"
- " -V print udev version\n"
- " -h print this help text\n"
- "\n");
-
exit:
- udev_cleanup_device(&udev);
+ udev_device_cleanup(udev);
+ sysfs_cleanup();
logging_close();
- return retval;
+ return rc;
}
~ianmdlvl / elogind.git / blobdiff