mirror of
https://github.com/systemd/systemd.git
synced 2024-11-12 15:21:19 +03:00
522 lines
20 KiB
C
522 lines
20 KiB
C
/*
|
|
* Copyright (C) 2004-2009 Kay Sievers <kay@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, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#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 <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "udev.h"
|
|
#include "udev-util.h"
|
|
|
|
static bool skip_attribute(const char *name) {
|
|
static const char* const skip[] = {
|
|
"uevent",
|
|
"dev",
|
|
"modalias",
|
|
"resource",
|
|
"driver",
|
|
"subsystem",
|
|
"module",
|
|
};
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ELEMENTSOF(skip); i++)
|
|
if (streq(name, skip[i]))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static void print_all_attributes(struct udev_device *device, const char *key) {
|
|
struct udev_list_entry *sysattr;
|
|
|
|
udev_list_entry_foreach(sysattr, udev_device_get_sysattr_list_entry(device)) {
|
|
const char *name;
|
|
const char *value;
|
|
size_t len;
|
|
|
|
name = udev_list_entry_get_name(sysattr);
|
|
if (skip_attribute(name))
|
|
continue;
|
|
|
|
value = udev_device_get_sysattr_value(device, name);
|
|
if (value == NULL)
|
|
continue;
|
|
|
|
/* skip any values that look like a path */
|
|
if (value[0] == '/')
|
|
continue;
|
|
|
|
/* skip nonprintable attributes */
|
|
len = strlen(value);
|
|
while (len > 0 && isprint(value[len-1]))
|
|
len--;
|
|
if (len > 0)
|
|
continue;
|
|
|
|
printf(" %s{%s}==\"%s\"\n", key, name, value);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
static int print_device_chain(struct udev_device *device) {
|
|
struct udev_device *device_parent;
|
|
const char *str;
|
|
|
|
printf("\n"
|
|
"Udevadm info 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", udev_device_get_devpath(device));
|
|
printf(" KERNEL==\"%s\"\n", udev_device_get_sysname(device));
|
|
str = udev_device_get_subsystem(device);
|
|
if (str == NULL)
|
|
str = "";
|
|
printf(" SUBSYSTEM==\"%s\"\n", str);
|
|
str = udev_device_get_driver(device);
|
|
if (str == NULL)
|
|
str = "";
|
|
printf(" DRIVER==\"%s\"\n", str);
|
|
print_all_attributes(device, "ATTR");
|
|
|
|
device_parent = device;
|
|
do {
|
|
device_parent = udev_device_get_parent(device_parent);
|
|
if (device_parent == NULL)
|
|
break;
|
|
printf(" looking at parent device '%s':\n", udev_device_get_devpath(device_parent));
|
|
printf(" KERNELS==\"%s\"\n", udev_device_get_sysname(device_parent));
|
|
str = udev_device_get_subsystem(device_parent);
|
|
if (str == NULL)
|
|
str = "";
|
|
printf(" SUBSYSTEMS==\"%s\"\n", str);
|
|
str = udev_device_get_driver(device_parent);
|
|
if (str == NULL)
|
|
str = "";
|
|
printf(" DRIVERS==\"%s\"\n", str);
|
|
print_all_attributes(device_parent, "ATTRS");
|
|
} while (device_parent != NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void print_record(struct udev_device *device) {
|
|
const char *str;
|
|
int i;
|
|
struct udev_list_entry *list_entry;
|
|
|
|
printf("P: %s\n", udev_device_get_devpath(device));
|
|
|
|
str = udev_device_get_devnode(device);
|
|
if (str != NULL)
|
|
printf("N: %s\n", str + strlen("/dev/"));
|
|
|
|
i = udev_device_get_devlink_priority(device);
|
|
if (i != 0)
|
|
printf("L: %i\n", i);
|
|
|
|
udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device))
|
|
printf("S: %s\n", udev_list_entry_get_name(list_entry) + strlen("/dev/"));
|
|
|
|
udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device))
|
|
printf("E: %s=%s\n",
|
|
udev_list_entry_get_name(list_entry),
|
|
udev_list_entry_get_value(list_entry));
|
|
printf("\n");
|
|
}
|
|
|
|
static int stat_device(const char *name, bool export, const char *prefix) {
|
|
struct stat statbuf;
|
|
|
|
if (stat(name, &statbuf) != 0)
|
|
return -1;
|
|
|
|
if (export) {
|
|
if (prefix == NULL)
|
|
prefix = "INFO_";
|
|
printf("%sMAJOR=%d\n"
|
|
"%sMINOR=%d\n",
|
|
prefix, major(statbuf.st_dev),
|
|
prefix, minor(statbuf.st_dev));
|
|
} else
|
|
printf("%d:%d\n", major(statbuf.st_dev), minor(statbuf.st_dev));
|
|
return 0;
|
|
}
|
|
|
|
static int export_devices(struct udev *udev) {
|
|
struct udev_enumerate *udev_enumerate;
|
|
struct udev_list_entry *list_entry;
|
|
|
|
udev_enumerate = udev_enumerate_new(udev);
|
|
if (udev_enumerate == NULL)
|
|
return -1;
|
|
udev_enumerate_scan_devices(udev_enumerate);
|
|
udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
|
|
struct udev_device *device;
|
|
|
|
device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
|
|
if (device != NULL) {
|
|
print_record(device);
|
|
udev_device_unref(device);
|
|
}
|
|
}
|
|
udev_enumerate_unref(udev_enumerate);
|
|
return 0;
|
|
}
|
|
|
|
static void cleanup_dir(DIR *dir, mode_t mask, int depth) {
|
|
struct dirent *dent;
|
|
|
|
if (depth <= 0)
|
|
return;
|
|
|
|
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
|
|
struct stat stats;
|
|
|
|
if (dent->d_name[0] == '.')
|
|
continue;
|
|
if (fstatat(dirfd(dir), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0)
|
|
continue;
|
|
if ((stats.st_mode & mask) != 0)
|
|
continue;
|
|
if (S_ISDIR(stats.st_mode)) {
|
|
DIR *dir2;
|
|
|
|
dir2 = fdopendir(openat(dirfd(dir), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC));
|
|
if (dir2 != NULL) {
|
|
cleanup_dir(dir2, mask, depth-1);
|
|
closedir(dir2);
|
|
}
|
|
unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR);
|
|
} else {
|
|
unlinkat(dirfd(dir), dent->d_name, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void cleanup_db(struct udev *udev) {
|
|
DIR *dir;
|
|
|
|
unlink("/run/udev/queue.bin");
|
|
|
|
dir = opendir("/run/udev/data");
|
|
if (dir != NULL) {
|
|
cleanup_dir(dir, S_ISVTX, 1);
|
|
closedir(dir);
|
|
}
|
|
|
|
dir = opendir("/run/udev/links");
|
|
if (dir != NULL) {
|
|
cleanup_dir(dir, 0, 2);
|
|
closedir(dir);
|
|
}
|
|
|
|
dir = opendir("/run/udev/tags");
|
|
if (dir != NULL) {
|
|
cleanup_dir(dir, 0, 2);
|
|
closedir(dir);
|
|
}
|
|
|
|
dir = opendir("/run/udev/static_node-tags");
|
|
if (dir != NULL) {
|
|
cleanup_dir(dir, 0, 2);
|
|
closedir(dir);
|
|
}
|
|
|
|
dir = opendir("/run/udev/watch");
|
|
if (dir != NULL) {
|
|
cleanup_dir(dir, 0, 1);
|
|
closedir(dir);
|
|
}
|
|
}
|
|
|
|
static struct udev_device *find_device(struct udev *udev, const char *id, const char *prefix) {
|
|
char name[UTIL_PATH_SIZE];
|
|
|
|
if (prefix && !startswith(id, prefix)) {
|
|
strscpyl(name, sizeof(name), prefix, id, NULL);
|
|
id = name;
|
|
}
|
|
|
|
if (startswith(id, "/dev/")) {
|
|
struct stat statbuf;
|
|
char type;
|
|
|
|
if (stat(id, &statbuf) < 0)
|
|
return NULL;
|
|
|
|
if (S_ISBLK(statbuf.st_mode))
|
|
type = 'b';
|
|
else if (S_ISCHR(statbuf.st_mode))
|
|
type = 'c';
|
|
else
|
|
return NULL;
|
|
|
|
return udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
|
|
} else if (startswith(id, "/sys/"))
|
|
return udev_device_new_from_syspath(udev, id);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
static int uinfo(struct udev *udev, int argc, char *argv[]) {
|
|
_cleanup_udev_device_unref_ struct udev_device *device = NULL;
|
|
bool root = 0;
|
|
bool export = 0;
|
|
const char *export_prefix = NULL;
|
|
char name[UTIL_PATH_SIZE];
|
|
struct udev_list_entry *list_entry;
|
|
int c;
|
|
|
|
static const struct option options[] = {
|
|
{ "name", required_argument, NULL, 'n' },
|
|
{ "path", required_argument, NULL, 'p' },
|
|
{ "query", required_argument, NULL, 'q' },
|
|
{ "attribute-walk", no_argument, NULL, 'a' },
|
|
{ "cleanup-db", no_argument, NULL, 'c' },
|
|
{ "export-db", no_argument, NULL, 'e' },
|
|
{ "root", no_argument, NULL, 'r' },
|
|
{ "device-id-of-file", required_argument, NULL, 'd' },
|
|
{ "export", no_argument, NULL, 'x' },
|
|
{ "export-prefix", required_argument, NULL, 'P' },
|
|
{ "version", no_argument, NULL, 'V' },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{}
|
|
};
|
|
|
|
static const char *usage =
|
|
"Usage: udevadm info [OPTIONS] [DEVPATH|FILE]\n"
|
|
" -q,--query=TYPE query device information:\n"
|
|
" name name of device node\n"
|
|
" symlink pointing to node\n"
|
|
" path sys device path\n"
|
|
" property the device properties\n"
|
|
" all all values\n"
|
|
" -p,--path=SYSPATH sys device path used for query or attribute walk\n"
|
|
" -n,--name=NAME node or symlink name used for query or attribute walk\n"
|
|
" -r,--root prepend dev directory to path names\n"
|
|
" -a,--attribute-walk print all key matches walking along the chain\n"
|
|
" of parent devices\n"
|
|
" -d,--device-id-of-file=FILE print major:minor of device containing this file\n"
|
|
" -x,--export export key/value pairs\n"
|
|
" -P,--export-prefix export the key name with a prefix\n"
|
|
" -e,--export-db export the content of the udev database\n"
|
|
" -c,--cleanup-db cleanup the udev database\n"
|
|
" --version print version of the program\n"
|
|
" -h,--help print this message\n";
|
|
|
|
enum action_type {
|
|
ACTION_QUERY,
|
|
ACTION_ATTRIBUTE_WALK,
|
|
ACTION_DEVICE_ID_FILE,
|
|
} action = ACTION_QUERY;
|
|
|
|
enum query_type {
|
|
QUERY_NAME,
|
|
QUERY_PATH,
|
|
QUERY_SYMLINK,
|
|
QUERY_PROPERTY,
|
|
QUERY_ALL,
|
|
} query = QUERY_ALL;
|
|
|
|
while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL)) >= 0)
|
|
switch (c) {
|
|
case 'n': {
|
|
if (device != NULL) {
|
|
fprintf(stderr, "device already specified\n");
|
|
return 2;
|
|
}
|
|
|
|
device = find_device(udev, optarg, "/dev/");
|
|
if (device == NULL) {
|
|
fprintf(stderr, "device node not found\n");
|
|
return 2;
|
|
}
|
|
break;
|
|
}
|
|
case 'p':
|
|
if (device != NULL) {
|
|
fprintf(stderr, "device already specified\n");
|
|
return 2;
|
|
}
|
|
|
|
device = find_device(udev, optarg, "/sys");
|
|
if (device == NULL) {
|
|
fprintf(stderr, "syspath not found\n");
|
|
return 2;
|
|
}
|
|
break;
|
|
case 'q':
|
|
action = ACTION_QUERY;
|
|
if (streq(optarg, "property") || streq(optarg, "env"))
|
|
query = QUERY_PROPERTY;
|
|
else if (streq(optarg, "name"))
|
|
query = QUERY_NAME;
|
|
else if (streq(optarg, "symlink"))
|
|
query = QUERY_SYMLINK;
|
|
else if (streq(optarg, "path"))
|
|
query = QUERY_PATH;
|
|
else if (streq(optarg, "all"))
|
|
query = QUERY_ALL;
|
|
else {
|
|
fprintf(stderr, "unknown query type\n");
|
|
return 3;
|
|
}
|
|
break;
|
|
case 'r':
|
|
root = true;
|
|
break;
|
|
case 'd':
|
|
action = ACTION_DEVICE_ID_FILE;
|
|
strscpy(name, sizeof(name), optarg);
|
|
break;
|
|
case 'a':
|
|
action = ACTION_ATTRIBUTE_WALK;
|
|
break;
|
|
case 'e':
|
|
export_devices(udev);
|
|
return 0;
|
|
case 'c':
|
|
cleanup_db(udev);
|
|
return 0;
|
|
case 'x':
|
|
export = true;
|
|
break;
|
|
case 'P':
|
|
export_prefix = optarg;
|
|
break;
|
|
case 'V':
|
|
printf("%s\n", VERSION);
|
|
return 0;
|
|
case 'h':
|
|
printf("%s\n", usage);
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
|
|
switch (action) {
|
|
case ACTION_QUERY:
|
|
if (!device) {
|
|
if (!argv[optind]) {
|
|
fprintf(stderr, "%s\n", usage);
|
|
return 2;
|
|
}
|
|
device = find_device(udev, argv[optind], NULL);
|
|
if (!device) {
|
|
fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
|
|
return 4;
|
|
}
|
|
}
|
|
|
|
switch(query) {
|
|
case QUERY_NAME: {
|
|
const char *node = udev_device_get_devnode(device);
|
|
|
|
if (node == NULL) {
|
|
fprintf(stderr, "no device node found\n");
|
|
return 5;
|
|
}
|
|
|
|
if (root)
|
|
printf("%s\n", udev_device_get_devnode(device));
|
|
else
|
|
printf("%s\n", udev_device_get_devnode(device) + strlen("/dev/"));
|
|
break;
|
|
}
|
|
case QUERY_SYMLINK:
|
|
list_entry = udev_device_get_devlinks_list_entry(device);
|
|
while (list_entry != NULL) {
|
|
if (root)
|
|
printf("%s", udev_list_entry_get_name(list_entry));
|
|
else
|
|
printf("%s", udev_list_entry_get_name(list_entry) + strlen("/dev/"));
|
|
list_entry = udev_list_entry_get_next(list_entry);
|
|
if (list_entry != NULL)
|
|
printf(" ");
|
|
}
|
|
printf("\n");
|
|
break;
|
|
case QUERY_PATH:
|
|
printf("%s\n", udev_device_get_devpath(device));
|
|
return 0;
|
|
case QUERY_PROPERTY:
|
|
list_entry = udev_device_get_properties_list_entry(device);
|
|
while (list_entry != NULL) {
|
|
if (export) {
|
|
const char *prefix = export_prefix;
|
|
|
|
if (prefix == NULL)
|
|
prefix = "";
|
|
printf("%s%s='%s'\n", prefix,
|
|
udev_list_entry_get_name(list_entry),
|
|
udev_list_entry_get_value(list_entry));
|
|
} else {
|
|
printf("%s=%s\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
|
|
}
|
|
list_entry = udev_list_entry_get_next(list_entry);
|
|
}
|
|
break;
|
|
case QUERY_ALL:
|
|
print_record(device);
|
|
break;
|
|
default:
|
|
assert_not_reached("unknown query type");
|
|
}
|
|
break;
|
|
case ACTION_ATTRIBUTE_WALK:
|
|
if (!device && argv[optind]) {
|
|
device = find_device(udev, argv[optind], NULL);
|
|
if (!device) {
|
|
fprintf(stderr, "Unknown device, absolute path in /dev/ or /sys expected.\n");
|
|
return 4;
|
|
}
|
|
}
|
|
if (!device) {
|
|
fprintf(stderr, "Unknown device, --name=, --path=, or absolute path in /dev/ or /sys expected.\n");
|
|
return 4;
|
|
}
|
|
print_device_chain(device);
|
|
break;
|
|
case ACTION_DEVICE_ID_FILE:
|
|
if (stat_device(name, export, export_prefix) != 0)
|
|
return 1;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct udevadm_cmd udevadm_info = {
|
|
.name = "info",
|
|
.cmd = uinfo,
|
|
.help = "query sysfs or the udev database",
|
|
};
|