/*
- * udevinfo - fetches attributes for a device
+ * udevinfo.c - 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.
#include <unistd.h>
#include <errno.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"
-#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)
+#ifdef USE_LOG
+void log_message (int priority, const char *format, ...)
{
- struct dlist *attributes;
- struct sysfs_attribute *attr;
- struct sysfs_directory *sysfs_dir;
- char value[SYSFS_VALUE_MAX];
- int len;
- int retval = 0;
+ va_list args;
- sysfs_dir = sysfs_open_directory(path);
- if (sysfs_dir == NULL)
- return -1;
+ if (priority > udev_log_priority)
+ return;
- attributes = sysfs_get_dir_attributes(sysfs_dir);
- if (attributes == NULL) {
- retval = -1;
- goto exit;
- }
+ va_start(args, format);
+ vsyslog(priority, format, args);
+ va_end(args);
+}
+#endif
- 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--;
- }
+static void print_all_attributes(struct dlist *attr_list)
+{
+ struct sysfs_attribute *attr;
+ char value[VALUE_SIZE];
+ size_t len;
+
+ 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;
+ }
- /* skip nonprintable values */
- while (len) {
- if (isprint(value[len-1]) == 0)
- break;
- len--;
- }
- if (len == 0)
- printf(" SYSFS_%s=\"%s\"\n", attr->name, value);
+ /* 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");
-
-exit:
- sysfs_close_directory(sysfs_dir);
-
- return retval;
}
-/* callback for database dump */
-static int print_record(char *path, struct udevice *dev)
+static int print_record(struct udevice *udev)
{
- 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");
+ struct name_entry *name_loop;
+
+ printf("P: %s\n", udev->devpath);
+ printf("N: %s\n", udev->name);
+ list_for_each_entry(name_loop, &udev->symlink_list, node)
+ printf("S: %s\n", name_loop->name);
+
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;
+ struct dlist *attr_list;
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");
+ fprintf(stderr, "couldn't get the class device\n");
return -1;
}
- /* read the 'dev' file for major/minor*/
+ 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");
+
+ /* look for the 'dev' file */
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);
+ if (attr != NULL)
+ printf("device '%s' has major:minor %s", class_dev->path, attr->value);
/* 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");
+ printf(" SUBSYSTEM==\"%s\"\n", class_dev->classname);
+
+ 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_close_class_device(class_dev);
- class_dev = class_dev_parent;
- }
- sysfs_dev = sysfs_get_classdev_device(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");
+ 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);
-
- /* 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)
+ 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");
+
+ sysfs_dev = sysfs_get_device_parent(sysfs_dev);
+ if (sysfs_dev == NULL)
break;
-
- //sysfs_close_device(sysfs_dev);
- sysfs_dev = sysfs_dev_parent;
}
- sysfs_close_device(sysfs_dev);
exit:
- //sysfs_close_class_device(class_dev);
+ sysfs_close_class_device(class_dev);
return retval;
}
-static int process_options(void)
+static int print_dump(const char *devpath, const char *name) {
+ printf("%s=%s/%s\n", devpath, udev_root, name);
+ return 0;
+}
+
+int main(int argc, char *argv[], char *envp[])
{
static const char short_options[] = "adn: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 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 retval = 0;
+
+ logging_init("udevinfo");
+
+ udev_init_config();
+ udev_init_device(&udev, NULL, NULL, NULL);
/* 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);
+ strlcpy(path, optarg, sizeof(path));
break;
case 'q':
dbg("udev query: %s\n", optarg);
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, "mode") == 0) {
- query = MODE;
- 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");
+ retval = 1;
+ goto exit;
case 'r':
root = 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);
+ udev_db_dump_names(print_dump);
+ goto exit;
case 'V':
printf("udevinfo, version %s\n", UDEV_VERSION);
- exit(0);
+ goto exit;
case 'h':
- retval = 0;
+ retval = 2;
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 (query != QUERY_NONE) {
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 */
- strcat(temp, "/");
- strncat(temp, path, sizeof(path));
+ strcpy(temp, "/");
+ strlcpy(temp, path, sizeof(temp));
pos = temp;
} else {
pos = path;
}
}
- retval = udevdb_get_dev(pos, &dev);
+ retval = udev_db_get_device(&udev, pos);
if (retval != 0) {
- printf("device not found in database\n");
+ fprintf(stderr, "no record for '%s' in database\n", pos);
goto exit;
}
goto print;
}
if (name[0] != '\0') {
+ char devpath[PATH_SIZE];
+ int len;
+
/* 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);
+
+ retval = udev_db_search_name(devpath, sizeof(devpath), pos);
if (retval != 0) {
- printf("device not found in database\n");
+ fprintf(stderr, "device not found in database\n");
goto exit;
}
+ udev_db_get_device(&udev, devpath);
goto print;
}
- printf("query needs device path(-p) or node name(-n) specified\n");
+ fprintf(stderr, "query needs device path(-p) or node name(-n) specified\n");
+ retval = 3;
goto exit;
print:
switch(query) {
- case NAME:
+ case QUERY_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:
+ printf("%s/%s\n", udev_root, udev.name);
+ else
+ printf("%s\n", udev.name);
+ goto exit;
+ 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;
+ case QUERY_PATH:
+ printf("%s\n", udev.devpath);
goto exit;
+ case QUERY_ENV:
+ list_for_each_entry(name_loop, &udev.env_list, node)
+ printf("%s\n", name_loop->name);
+ goto exit;
+ case QUERY_ALL:
+ print_record(&udev);
+ goto exit;
+ default:
+ goto help;
}
- 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;
+ 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 */
- strfieldcpy(temp, path);
- strfieldcpy(path, sysfs_path);
- strncat(path, temp, sizeof(path));
+ snprintf(temp, sizeof(temp), "%s%s", sysfs_path, path);
+ temp[sizeof(temp)-1] = '\0';
+ strlcpy(path, temp, sizeof(temp));
}
print_device_chain(path);
- return 0;
+ goto exit;
}
}
if (root) {
printf("%s\n", udev_root);
- return 0;
+ goto exit;
}
help:
- printf("Usage: [-anpqrdVh]\n"
+ 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"
- " 'mode' permissions of node\n"
- " 'owner' of node\n"
- " 'group' of 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 name used for query\n"
+ " -n NAME node/symlink 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"
+ " -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");
- 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);
+exit:
+ udev_cleanup_device(&udev);
+ logging_close();
+ return retval;
}
~ianmdlvl / elogind.git / blobdiff