491 lines
17 KiB
C
491 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <getopt.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
|
|
#include "sd-device.h"
|
|
|
|
#include "alloc-util.h"
|
|
#include "device-enumerator-private.h"
|
|
#include "device-private.h"
|
|
#include "device-util.h"
|
|
#include "dirent-util.h"
|
|
#include "fd-util.h"
|
|
#include "string-table.h"
|
|
#include "string-util.h"
|
|
#include "udev-util.h"
|
|
#include "udevadm-util.h"
|
|
#include "udevadm.h"
|
|
|
|
typedef enum ActionType {
|
|
ACTION_QUERY,
|
|
ACTION_ATTRIBUTE_WALK,
|
|
ACTION_DEVICE_ID_FILE,
|
|
} ActionType;
|
|
|
|
typedef enum QueryType {
|
|
QUERY_NAME,
|
|
QUERY_PATH,
|
|
QUERY_SYMLINK,
|
|
QUERY_PROPERTY,
|
|
QUERY_ALL,
|
|
} QueryType;
|
|
|
|
static bool arg_root = false;
|
|
static bool arg_export = false;
|
|
static const char *arg_export_prefix = NULL;
|
|
static usec_t arg_wait_for_initialization_timeout = 0;
|
|
|
|
static bool skip_attribute(const char *name) {
|
|
static const char* const skip[] = {
|
|
"uevent",
|
|
"dev",
|
|
"modalias",
|
|
"resource",
|
|
"driver",
|
|
"subsystem",
|
|
"module",
|
|
};
|
|
|
|
return string_table_lookup(skip, ELEMENTSOF(skip), name) >= 0;
|
|
}
|
|
|
|
static void print_all_attributes(sd_device *device, const char *key) {
|
|
const char *name, *value;
|
|
|
|
FOREACH_DEVICE_SYSATTR(device, name) {
|
|
size_t len;
|
|
|
|
if (skip_attribute(name))
|
|
continue;
|
|
|
|
if (sd_device_get_sysattr_value(device, name, &value) < 0)
|
|
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);
|
|
}
|
|
puts("");
|
|
}
|
|
|
|
static int print_device_chain(sd_device *device) {
|
|
sd_device *child, *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");
|
|
|
|
(void) sd_device_get_devpath(device, &str);
|
|
printf(" looking at device '%s':\n", str);
|
|
(void) sd_device_get_sysname(device, &str);
|
|
printf(" KERNEL==\"%s\"\n", str);
|
|
if (sd_device_get_subsystem(device, &str) < 0)
|
|
str = "";
|
|
printf(" SUBSYSTEM==\"%s\"\n", str);
|
|
if (sd_device_get_driver(device, &str) < 0)
|
|
str = "";
|
|
printf(" DRIVER==\"%s\"\n", str);
|
|
print_all_attributes(device, "ATTR");
|
|
|
|
for (child = device; sd_device_get_parent(child, &parent) >= 0; child = parent) {
|
|
(void) sd_device_get_devpath(parent, &str);
|
|
printf(" looking at parent device '%s':\n", str);
|
|
(void) sd_device_get_sysname(parent, &str);
|
|
printf(" KERNELS==\"%s\"\n", str);
|
|
if (sd_device_get_subsystem(parent, &str) < 0)
|
|
str = "";
|
|
printf(" SUBSYSTEMS==\"%s\"\n", str);
|
|
if (sd_device_get_driver(parent, &str) < 0)
|
|
str = "";
|
|
printf(" DRIVERS==\"%s\"\n", str);
|
|
print_all_attributes(parent, "ATTRS");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int print_record(sd_device *device) {
|
|
const char *str, *val;
|
|
int i;
|
|
|
|
(void) sd_device_get_devpath(device, &str);
|
|
printf("P: %s\n", str);
|
|
|
|
if (sd_device_get_devname(device, &str) >= 0) {
|
|
assert_se(val = path_startswith(str, "/dev/"));
|
|
printf("N: %s\n", val);
|
|
}
|
|
|
|
if (device_get_devlink_priority(device, &i) >= 0)
|
|
printf("L: %i\n", i);
|
|
|
|
FOREACH_DEVICE_DEVLINK(device, str) {
|
|
assert_se(val = path_startswith(str, "/dev/"));
|
|
printf("S: %s\n", val);
|
|
}
|
|
|
|
FOREACH_DEVICE_PROPERTY(device, str, val)
|
|
printf("E: %s=%s\n", str, val);
|
|
|
|
puts("");
|
|
return 0;
|
|
}
|
|
|
|
static int stat_device(const char *name, bool export, const char *prefix) {
|
|
struct stat statbuf;
|
|
|
|
if (stat(name, &statbuf) != 0)
|
|
return -errno;
|
|
|
|
if (export) {
|
|
if (!prefix)
|
|
prefix = "INFO_";
|
|
printf("%sMAJOR=%u\n"
|
|
"%sMINOR=%u\n",
|
|
prefix, major(statbuf.st_dev),
|
|
prefix, minor(statbuf.st_dev));
|
|
} else
|
|
printf("%u:%u\n", major(statbuf.st_dev), minor(statbuf.st_dev));
|
|
return 0;
|
|
}
|
|
|
|
static int export_devices(void) {
|
|
_cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
|
|
sd_device *d;
|
|
int r;
|
|
|
|
r = sd_device_enumerator_new(&e);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_device_enumerator_allow_uninitialized(e);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = device_enumerator_scan_devices(e);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
FOREACH_DEVICE_AND_SUBSYSTEM(e, d)
|
|
print_record(d);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cleanup_dir(DIR *dir, mode_t mask, int depth) {
|
|
struct dirent *dent;
|
|
|
|
if (depth <= 0)
|
|
return;
|
|
|
|
FOREACH_DIRENT_ALL(dent, dir, break) {
|
|
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)) {
|
|
_cleanup_closedir_ DIR *dir2 = NULL;
|
|
|
|
dir2 = fdopendir(openat(dirfd(dir), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC));
|
|
if (dir2)
|
|
cleanup_dir(dir2, mask, depth-1);
|
|
|
|
(void) unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR);
|
|
} else
|
|
(void) unlinkat(dirfd(dir), dent->d_name, 0);
|
|
}
|
|
}
|
|
|
|
static void cleanup_db(void) {
|
|
_cleanup_closedir_ DIR *dir1 = NULL, *dir2 = NULL, *dir3 = NULL, *dir4 = NULL, *dir5 = NULL;
|
|
|
|
(void) unlink("/run/udev/queue.bin");
|
|
|
|
dir1 = opendir("/run/udev/data");
|
|
if (dir1)
|
|
cleanup_dir(dir1, S_ISVTX, 1);
|
|
|
|
dir2 = opendir("/run/udev/links");
|
|
if (dir2)
|
|
cleanup_dir(dir2, 0, 2);
|
|
|
|
dir3 = opendir("/run/udev/tags");
|
|
if (dir3)
|
|
cleanup_dir(dir3, 0, 2);
|
|
|
|
dir4 = opendir("/run/udev/static_node-tags");
|
|
if (dir4)
|
|
cleanup_dir(dir4, 0, 2);
|
|
|
|
dir5 = opendir("/run/udev/watch");
|
|
if (dir5)
|
|
cleanup_dir(dir5, 0, 1);
|
|
}
|
|
|
|
static int query_device(QueryType query, sd_device* device) {
|
|
int r;
|
|
|
|
assert(device);
|
|
|
|
switch(query) {
|
|
case QUERY_NAME: {
|
|
const char *node;
|
|
|
|
r = sd_device_get_devname(device, &node);
|
|
if (r < 0)
|
|
return log_error_errno(r, "No device node found: %m");
|
|
|
|
if (!arg_root)
|
|
assert_se(node = path_startswith(node, "/dev/"));
|
|
printf("%s\n", node);
|
|
return 0;
|
|
}
|
|
|
|
case QUERY_SYMLINK: {
|
|
const char *devlink, *prefix = "";
|
|
|
|
FOREACH_DEVICE_DEVLINK(device, devlink) {
|
|
if (!arg_root)
|
|
assert_se(devlink = path_startswith(devlink, "/dev/"));
|
|
printf("%s%s", prefix, devlink);
|
|
prefix = " ";
|
|
}
|
|
puts("");
|
|
return 0;
|
|
}
|
|
|
|
case QUERY_PATH: {
|
|
const char *devpath;
|
|
|
|
r = sd_device_get_devpath(device, &devpath);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to get device path: %m");
|
|
|
|
printf("%s\n", devpath);
|
|
return 0;
|
|
}
|
|
|
|
case QUERY_PROPERTY: {
|
|
const char *key, *value;
|
|
|
|
FOREACH_DEVICE_PROPERTY(device, key, value)
|
|
if (arg_export)
|
|
printf("%s%s='%s'\n", strempty(arg_export_prefix), key, value);
|
|
else
|
|
printf("%s=%s\n", key, value);
|
|
return 0;
|
|
}
|
|
|
|
case QUERY_ALL:
|
|
return print_record(device);
|
|
}
|
|
|
|
assert_not_reached("unknown query type");
|
|
return 0;
|
|
}
|
|
|
|
static int help(void) {
|
|
printf("%s info [OPTIONS] [DEVPATH|FILE]\n\n"
|
|
"Query sysfs or the udev database.\n\n"
|
|
" -h --help Print this message\n"
|
|
" -V --version Print version of the program\n"
|
|
" -q --query=TYPE Query device information:\n"
|
|
" name Name of device node\n"
|
|
" symlink Pointing to node\n"
|
|
" path sysfs device path\n"
|
|
" property The device properties\n"
|
|
" all All values\n"
|
|
" -p --path=SYSPATH sysfs 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 Clean up the udev database\n"
|
|
" -w --wait-for-initialization[=SECONDS]\n"
|
|
" Wait for device to be initialized\n"
|
|
, program_invocation_short_name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int info_main(int argc, char *argv[], void *userdata) {
|
|
_cleanup_strv_free_ char **devices = NULL;
|
|
_cleanup_free_ char *name = NULL;
|
|
int c, r;
|
|
|
|
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' },
|
|
{ "wait-for-initialization", optional_argument, NULL, 'w' },
|
|
{ "version", no_argument, NULL, 'V' },
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{}
|
|
};
|
|
|
|
ActionType action = ACTION_QUERY;
|
|
QueryType query = QUERY_ALL;
|
|
|
|
while ((c = getopt_long(argc, argv, "aced:n:p:q:rxP:w::Vh", options, NULL)) >= 0)
|
|
switch (c) {
|
|
case 'n':
|
|
case 'p': {
|
|
const char *prefix = c == 'n' ? "/dev/" : "/sys/";
|
|
char *path;
|
|
|
|
path = path_join(path_startswith(optarg, prefix) ? NULL : prefix, optarg);
|
|
if (!path)
|
|
return log_oom();
|
|
|
|
r = strv_consume(&devices, path);
|
|
if (r < 0)
|
|
return log_oom();
|
|
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
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "unknown query type");
|
|
break;
|
|
case 'r':
|
|
arg_root = true;
|
|
break;
|
|
case 'd':
|
|
action = ACTION_DEVICE_ID_FILE;
|
|
r = free_and_strdup(&name, optarg);
|
|
if (r < 0)
|
|
return log_oom();
|
|
break;
|
|
case 'a':
|
|
action = ACTION_ATTRIBUTE_WALK;
|
|
break;
|
|
case 'e':
|
|
return export_devices();
|
|
case 'c':
|
|
cleanup_db();
|
|
return 0;
|
|
case 'x':
|
|
arg_export = true;
|
|
break;
|
|
case 'P':
|
|
arg_export = true;
|
|
arg_export_prefix = optarg;
|
|
break;
|
|
case 'w':
|
|
if (optarg) {
|
|
r = parse_sec(optarg, &arg_wait_for_initialization_timeout);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse timeout value: %m");
|
|
} else
|
|
arg_wait_for_initialization_timeout = USEC_INFINITY;
|
|
break;
|
|
case 'V':
|
|
return print_version();
|
|
case 'h':
|
|
return help();
|
|
case '?':
|
|
return -EINVAL;
|
|
default:
|
|
assert_not_reached("Unknown option");
|
|
}
|
|
|
|
if (action == ACTION_DEVICE_ID_FILE) {
|
|
if (argv[optind])
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Positional arguments are not allowed with -d/--device-id-of-file.");
|
|
assert(name);
|
|
return stat_device(name, arg_export, arg_export_prefix);
|
|
}
|
|
|
|
r = strv_extend_strv(&devices, argv + optind, false);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to build argument list: %m");
|
|
|
|
if (strv_isempty(devices))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"A device name or path is required");
|
|
if (action == ACTION_ATTRIBUTE_WALK && strv_length(devices) > 1)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Only one device may be specified with -a/--attribute-walk");
|
|
|
|
char **p;
|
|
STRV_FOREACH(p, devices) {
|
|
_cleanup_(sd_device_unrefp) sd_device *device = NULL;
|
|
|
|
r = find_device(*p, NULL, &device);
|
|
if (r == -EINVAL)
|
|
return log_error_errno(r, "Bad argument \"%s\", expected an absolute path in /dev/ or /sys or a unit name: %m", *p);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Unknown device \"%s\": %m", *p);
|
|
|
|
if (arg_wait_for_initialization_timeout > 0) {
|
|
sd_device *d;
|
|
|
|
r = device_wait_for_initialization(device, NULL, arg_wait_for_initialization_timeout, &d);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
sd_device_unref(device);
|
|
device = d;
|
|
}
|
|
|
|
if (action == ACTION_QUERY)
|
|
r = query_device(query, device);
|
|
else if (action == ACTION_ATTRIBUTE_WALK)
|
|
r = print_device_chain(device);
|
|
else
|
|
assert_not_reached("Unknown action");
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|