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-rw-r--r--src/udev/udevadm-info.c871
1 files changed, 871 insertions, 0 deletions
diff --git a/src/udev/udevadm-info.c b/src/udev/udevadm-info.c
new file mode 100644
index 0000000..fccc967
--- /dev/null
+++ b/src/udev/udevadm-info.c
@@ -0,0 +1,871 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#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 "errno-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "glyph-util.h"
+#include "pager.h"
+#include "sort-util.h"
+#include "static-destruct.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "terminal-util.h"
+#include "udev-util.h"
+#include "udevadm.h"
+#include "udevadm-util.h"
+
+typedef enum ActionType {
+ ACTION_QUERY,
+ ACTION_ATTRIBUTE_WALK,
+ ACTION_DEVICE_ID_FILE,
+ ACTION_TREE,
+} ActionType;
+
+typedef enum QueryType {
+ QUERY_NAME,
+ QUERY_PATH,
+ QUERY_SYMLINK,
+ QUERY_PROPERTY,
+ QUERY_ALL,
+} QueryType;
+
+static char **arg_properties = NULL;
+static bool arg_root = false;
+static bool arg_export = false;
+static bool arg_value = false;
+static const char *arg_export_prefix = NULL;
+static usec_t arg_wait_for_initialization_timeout = 0;
+PagerFlags arg_pager_flags = 0;
+
+/* Put a limit on --tree descent level to not exhaust our stack */
+#define TREE_DEPTH_MAX 64
+
+static bool skip_attribute(const char *name) {
+ assert(name);
+
+ /* Those are either displayed separately or should not be shown at all. */
+ return STR_IN_SET(name,
+ "uevent",
+ "dev",
+ "modalias",
+ "resource",
+ "driver",
+ "subsystem",
+ "module");
+}
+
+typedef struct SysAttr {
+ const char *name;
+ const char *value;
+} SysAttr;
+
+STATIC_DESTRUCTOR_REGISTER(arg_properties, strv_freep);
+
+static int sysattr_compare(const SysAttr *a, const SysAttr *b) {
+ assert(a);
+ assert(b);
+
+ return strcmp(a->name, b->name);
+}
+
+static int print_all_attributes(sd_device *device, bool is_parent) {
+ _cleanup_free_ SysAttr *sysattrs = NULL;
+ const char *name, *value;
+ size_t n_items = 0;
+ int r;
+
+ assert(device);
+
+ value = NULL;
+ (void) sd_device_get_devpath(device, &value);
+ printf(" looking at %sdevice '%s':\n", is_parent ? "parent " : "", strempty(value));
+
+ value = NULL;
+ (void) sd_device_get_sysname(device, &value);
+ printf(" %s==\"%s\"\n", is_parent ? "KERNELS" : "KERNEL", strempty(value));
+
+ value = NULL;
+ (void) sd_device_get_subsystem(device, &value);
+ printf(" %s==\"%s\"\n", is_parent ? "SUBSYSTEMS" : "SUBSYSTEM", strempty(value));
+
+ value = NULL;
+ (void) sd_device_get_driver(device, &value);
+ printf(" %s==\"%s\"\n", is_parent ? "DRIVERS" : "DRIVER", strempty(value));
+
+ FOREACH_DEVICE_SYSATTR(device, name) {
+ size_t len;
+
+ if (skip_attribute(name))
+ continue;
+
+ r = sd_device_get_sysattr_value(device, name, &value);
+ if (r >= 0) {
+ /* skip any values that look like a path */
+ if (value[0] == '/')
+ continue;
+
+ /* skip nonprintable attributes */
+ len = strlen(value);
+ while (len > 0 && isprint((unsigned char) value[len-1]))
+ len--;
+ if (len > 0)
+ continue;
+
+ } else if (ERRNO_IS_PRIVILEGE(r))
+ value = "(not readable)";
+ else
+ continue;
+
+ if (!GREEDY_REALLOC(sysattrs, n_items + 1))
+ return log_oom();
+
+ sysattrs[n_items] = (SysAttr) {
+ .name = name,
+ .value = value,
+ };
+ n_items++;
+ }
+
+ typesafe_qsort(sysattrs, n_items, sysattr_compare);
+
+ for (size_t i = 0; i < n_items; i++)
+ printf(" %s{%s}==\"%s\"\n", is_parent ? "ATTRS" : "ATTR", sysattrs[i].name, sysattrs[i].value);
+
+ puts("");
+
+ return 0;
+}
+
+static int print_device_chain(sd_device *device) {
+ sd_device *child, *parent;
+ int r;
+
+ assert(device);
+
+ 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");
+
+ r = print_all_attributes(device, false);
+ if (r < 0)
+ return r;
+
+ for (child = device; sd_device_get_parent(child, &parent) >= 0; child = parent) {
+ r = print_all_attributes(parent, true);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int print_record(sd_device *device, const char *prefix) {
+ const char *str, *val, *subsys;
+ dev_t devnum;
+ uint64_t q;
+ int i, ifi;
+
+ assert(device);
+
+ prefix = strempty(prefix);
+
+ /* We don't show syspath here, because it's identical to devpath (modulo the "/sys" prefix).
+ *
+ * We don't show action/seqnum here because that only makes sense for records synthesized from
+ * uevents, not for those synthesized from database entries.
+ *
+ * We don't show sysattrs here, because they can be expensive and potentially issue expensive driver
+ * IO.
+ *
+ * Coloring: let's be conservative with coloring. Let's use it to group related fields. Right now:
+ *
+ * • white for fields that give the device a name
+ * • green for fields that categorize the device into subsystem/devtype and similar
+ * • cyan for fields about associated device nodes/symlinks/network interfaces and such
+ * • magenta for block device diskseq
+ * • yellow for driver info
+ * • no color for regular properties */
+
+ assert_se(sd_device_get_devpath(device, &str) >= 0);
+ printf("%sP: %s%s%s\n", prefix, ansi_highlight_white(), str, ansi_normal());
+
+ if (sd_device_get_sysname(device, &str) >= 0)
+ printf("%sM: %s%s%s\n", prefix, ansi_highlight_white(), str, ansi_normal());
+
+ if (sd_device_get_sysnum(device, &str) >= 0)
+ printf("%sR: %s%s%s\n", prefix, ansi_highlight_white(), str, ansi_normal());
+
+ if (sd_device_get_subsystem(device, &subsys) >= 0)
+ printf("%sU: %s%s%s\n", prefix, ansi_highlight_green(), subsys, ansi_normal());
+
+ if (sd_device_get_devtype(device, &str) >= 0)
+ printf("%sT: %s%s%s\n", prefix, ansi_highlight_green(), str, ansi_normal());
+
+ if (sd_device_get_devnum(device, &devnum) >= 0)
+ printf("%sD: %s%c %u:%u%s\n",
+ prefix,
+ ansi_highlight_cyan(),
+ streq_ptr(subsys, "block") ? 'b' : 'c', major(devnum), minor(devnum),
+ ansi_normal());
+
+ if (sd_device_get_ifindex(device, &ifi) >= 0)
+ printf("%sI: %s%i%s\n", prefix, ansi_highlight_cyan(), ifi, ansi_normal());
+
+ if (sd_device_get_devname(device, &str) >= 0) {
+ assert_se(val = path_startswith(str, "/dev/"));
+ printf("%sN: %s%s%s\n", prefix, ansi_highlight_cyan(), val, ansi_normal());
+
+ if (device_get_devlink_priority(device, &i) >= 0)
+ printf("%sL: %s%i%s\n", prefix, ansi_highlight_cyan(), i, ansi_normal());
+
+ FOREACH_DEVICE_DEVLINK(device, str) {
+ assert_se(val = path_startswith(str, "/dev/"));
+ printf("%sS: %s%s%s\n", prefix, ansi_highlight_cyan(), val, ansi_normal());
+ }
+ }
+
+ if (sd_device_get_diskseq(device, &q) >= 0)
+ printf("%sQ: %s%" PRIu64 "%s\n", prefix, ansi_highlight_magenta(), q, ansi_normal());
+
+ if (sd_device_get_driver(device, &str) >= 0)
+ printf("%sV: %s%s%s\n", prefix, ansi_highlight_yellow4(), str, ansi_normal());
+
+ FOREACH_DEVICE_PROPERTY(device, str, val)
+ printf("%sE: %s=%s\n", prefix, str, val);
+
+ if (isempty(prefix))
+ puts("");
+ return 0;
+}
+
+static int stat_device(const char *name, bool export, const char *prefix) {
+ struct stat statbuf;
+
+ assert(name);
+
+ 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 log_oom();
+
+ r = sd_device_enumerator_allow_uninitialized(e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set allowing uninitialized flag: %m");
+
+ r = device_enumerator_scan_devices(e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to scan devices: %m");
+
+ pager_open(arg_pager_flags);
+
+ FOREACH_DEVICE_AND_SUBSYSTEM(e, d)
+ (void) print_record(d, NULL);
+
+ return 0;
+}
+
+static void cleanup_dir(DIR *dir, mode_t mask, int depth) {
+ assert(dir);
+
+ if (depth <= 0)
+ return;
+
+ FOREACH_DIRENT_ALL(dent, dir, break) {
+ struct stat stats;
+
+ if (dot_or_dot_dot(dent->d_name))
+ 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 *subdir = NULL;
+
+ subdir = xopendirat(dirfd(dir), dent->d_name, O_NOFOLLOW);
+ if (!subdir)
+ log_debug_errno(errno, "Failed to open subdirectory '%s', ignoring: %m", dent->d_name);
+ else
+ cleanup_dir(subdir, mask, depth-1);
+
+ (void) unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR);
+ } else
+ (void) unlinkat(dirfd(dir), dent->d_name, 0);
+ }
+}
+
+/*
+ * Assume that dir is a directory with file names matching udev data base
+ * entries for devices in /run/udev/data (such as "b8:16"), and removes
+ * all files except those that haven't been deleted in /run/udev/data
+ * (i.e. they were skipped during db cleanup because of the db_persist flag).
+ */
+static void cleanup_dir_after_db_cleanup(DIR *dir, DIR *datadir) {
+ assert(dir);
+ assert(datadir);
+
+ FOREACH_DIRENT_ALL(dent, dir, break) {
+ if (dot_or_dot_dot(dent->d_name))
+ continue;
+
+ if (faccessat(dirfd(datadir), dent->d_name, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)
+ /* The corresponding udev database file still exists.
+ * Assuming the parsistent flag is set for the database. */
+ continue;
+
+ (void) unlinkat(dirfd(dir), dent->d_name, 0);
+ }
+}
+
+static void cleanup_dirs_after_db_cleanup(DIR *dir, DIR *datadir) {
+ assert(dir);
+ assert(datadir);
+
+ FOREACH_DIRENT_ALL(dent, dir, break) {
+ struct stat stats;
+
+ if (dot_or_dot_dot(dent->d_name))
+ continue;
+ if (fstatat(dirfd(dir), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) < 0)
+ continue;
+ if (S_ISDIR(stats.st_mode)) {
+ _cleanup_closedir_ DIR *subdir = NULL;
+
+ subdir = xopendirat(dirfd(dir), dent->d_name, O_NOFOLLOW);
+ if (!subdir)
+ log_debug_errno(errno, "Failed to open subdirectory '%s', ignoring: %m", dent->d_name);
+ else
+ cleanup_dir_after_db_cleanup(subdir, datadir);
+
+ (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;
+
+ dir1 = opendir("/run/udev/data");
+ if (dir1)
+ cleanup_dir(dir1, S_ISVTX, 1);
+
+ dir2 = opendir("/run/udev/links");
+ if (dir2)
+ cleanup_dirs_after_db_cleanup(dir2, dir1);
+
+ dir3 = opendir("/run/udev/tags");
+ if (dir3)
+ cleanup_dirs_after_db_cleanup(dir3, dir1);
+
+ dir4 = opendir("/run/udev/static_node-tags");
+ if (dir4)
+ cleanup_dir(dir4, 0, 2);
+
+ /* Do not remove /run/udev/watch. It will be handled by udevd well on restart.
+ * And should not be removed by external program when udevd is running. */
+}
+
+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_properties && !strv_contains(arg_properties, key))
+ continue;
+
+ if (arg_export)
+ printf("%s%s='%s'\n", strempty(arg_export_prefix), key, value);
+ else if (arg_value)
+ printf("%s\n", value);
+ else
+ printf("%s=%s\n", key, value);
+ }
+
+ return 0;
+ }
+
+ case QUERY_ALL:
+ return print_record(device, NULL);
+
+ default:
+ assert_not_reached();
+ }
+}
+
+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"
+ " --property=NAME Show only properties by this name\n"
+ " --value When showing properties, print only their 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"
+ " -t --tree Show tree of 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"
+ " --no-pager Do not pipe output into a pager\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int draw_tree(
+ sd_device *parent,
+ sd_device *const array[], size_t n,
+ const char *prefix,
+ unsigned level);
+
+static int output_tree_device(
+ sd_device *device,
+ const char *str,
+ const char *prefix,
+ bool more,
+ sd_device *const array[], size_t n,
+ unsigned level) {
+
+ _cleanup_free_ char *subprefix = NULL, *subsubprefix = NULL;
+
+ assert(device);
+ assert(str);
+
+ prefix = strempty(prefix);
+
+ printf("%s%s%s\n", prefix, special_glyph(more ? SPECIAL_GLYPH_TREE_BRANCH : SPECIAL_GLYPH_TREE_RIGHT), str);
+
+ subprefix = strjoin(prefix, special_glyph(more ? SPECIAL_GLYPH_TREE_VERTICAL : SPECIAL_GLYPH_TREE_SPACE));
+ if (!subprefix)
+ return log_oom();
+
+ subsubprefix = strjoin(subprefix, special_glyph(SPECIAL_GLYPH_VERTICAL_DOTTED), " ");
+ if (!subsubprefix)
+ return log_oom();
+
+ (void) print_record(device, subsubprefix);
+
+ return draw_tree(device, array, n, subprefix, level + 1);
+}
+
+static int draw_tree(
+ sd_device *parent,
+ sd_device *const array[], size_t n,
+ const char *prefix,
+ unsigned level) {
+
+ const char *parent_path;
+ size_t i = 0;
+ int r;
+
+ if (n == 0)
+ return 0;
+
+ assert(array);
+
+ if (parent) {
+ r = sd_device_get_devpath(parent, &parent_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get sysfs path of parent device: %m");
+ } else
+ parent_path = NULL;
+
+ if (level > TREE_DEPTH_MAX) {
+ log_warning("Eliding tree below '%s', too deep.", strna(parent_path));
+ return 0;
+ }
+
+ while (i < n) {
+ sd_device *device = array[i];
+ const char *device_path, *str;
+ bool more = false;
+ size_t j;
+
+ r = sd_device_get_devpath(device, &device_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get sysfs path of enumerated device: %m");
+
+ /* Scan through the subsequent devices looking children of the device we are looking at. */
+ for (j = i + 1; j < n; j++) {
+ sd_device *next = array[j];
+ const char *next_path;
+
+ r = sd_device_get_devpath(next, &next_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get sysfs of child device: %m");
+
+ if (!path_startswith(next_path, device_path)) {
+ more = !parent_path || path_startswith(next_path, parent_path);
+ break;
+ }
+ }
+
+ /* Determine the string to display for this node. If we are at the top of the tree, the full
+ * device path so far, otherwise just the part suffixing the parent's device path. */
+ str = parent ? ASSERT_PTR(path_startswith(device_path, parent_path)) : device_path;
+
+ r = output_tree_device(device, str, prefix, more, array + i + 1, j - i - 1, level);
+ if (r < 0)
+ return r;
+
+ i = j;
+ }
+
+ return 0;
+}
+
+static int print_tree(sd_device* below) {
+ _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
+ const char *below_path;
+ sd_device **array;
+ size_t n = 0;
+ int r;
+
+ if (below) {
+ r = sd_device_get_devpath(below, &below_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get sysfs path of device: %m");
+
+ } else
+ below_path = NULL;
+
+ r = sd_device_enumerator_new(&e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate device enumerator: %m");
+
+ if (below) {
+ r = sd_device_enumerator_add_match_parent(e, below);
+ if (r < 0)
+ return log_error_errno(r, "Failed to install parent enumerator match: %m");
+ }
+
+ r = sd_device_enumerator_allow_uninitialized(e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to enable enumeration of uninitialized devices: %m");
+
+ r = device_enumerator_scan_devices_and_subsystems(e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to scan for devices and subsystems: %m");
+
+ if (below) {
+ /* This must be called after device_enumerator_scan_devices_and_subsystems(). */
+ r = device_enumerator_add_parent_devices(e, below);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add parent devices: %m");
+ }
+
+ assert_se(array = device_enumerator_get_devices(e, &n));
+
+ if (n == 0) {
+ log_info("No items.");
+ return 0;
+ }
+
+ r = draw_tree(NULL, array, n, NULL, 0);
+ if (r < 0)
+ return r;
+
+ printf("\n%zu items shown.\n", n);
+ 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, ret;
+
+ enum {
+ ARG_PROPERTY = 0x100,
+ ARG_VALUE,
+ ARG_NO_PAGER,
+ };
+
+ static const struct option options[] = {
+ { "attribute-walk", no_argument, NULL, 'a' },
+ { "tree", no_argument, NULL, 't' },
+ { "cleanup-db", no_argument, NULL, 'c' },
+ { "device-id-of-file", required_argument, NULL, 'd' },
+ { "export", no_argument, NULL, 'x' },
+ { "export-db", no_argument, NULL, 'e' },
+ { "export-prefix", required_argument, NULL, 'P' },
+ { "help", no_argument, NULL, 'h' },
+ { "name", required_argument, NULL, 'n' },
+ { "path", required_argument, NULL, 'p' },
+ { "property", required_argument, NULL, ARG_PROPERTY },
+ { "query", required_argument, NULL, 'q' },
+ { "root", no_argument, NULL, 'r' },
+ { "value", no_argument, NULL, ARG_VALUE },
+ { "version", no_argument, NULL, 'V' },
+ { "wait-for-initialization", optional_argument, NULL, 'w' },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ {}
+ };
+
+ ActionType action = ACTION_QUERY;
+ QueryType query = QUERY_ALL;
+
+ while ((c = getopt_long(argc, argv, "atced:n:p:q:rxP:w::Vh", options, NULL)) >= 0)
+ switch (c) {
+ case ARG_PROPERTY:
+ /* Make sure that if the empty property list was specified, we won't show any
+ properties. */
+ if (isempty(optarg) && !arg_properties) {
+ arg_properties = new0(char*, 1);
+ if (!arg_properties)
+ return log_oom();
+ } else {
+ r = strv_split_and_extend(&arg_properties, optarg, ",", true);
+ if (r < 0)
+ return log_oom();
+ }
+ break;
+ case ARG_VALUE:
+ arg_value = true;
+ break;
+ 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 't':
+ action = ACTION_TREE;
+ 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 ARG_NO_PAGER:
+ arg_pager_flags |= PAGER_DISABLE;
+ break;
+ case '?':
+ return -EINVAL;
+ default:
+ assert_not_reached();
+ }
+
+ 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 (action != ACTION_TREE && strv_isempty(devices))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "A device name or path is required");
+ if (IN_SET(action, ACTION_ATTRIBUTE_WALK, ACTION_TREE) && strv_length(devices) > 1)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Only one device may be specified with -a/--attribute-walk and -t/--tree");
+
+ if (arg_export && arg_value)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "-x/--export or -P/--export-prefix cannot be used with --value");
+
+ pager_open(arg_pager_flags);
+
+ if (strv_isempty(devices)) {
+ assert(action == ACTION_TREE);
+ return print_tree(NULL);
+ }
+
+ ret = 0;
+ STRV_FOREACH(p, devices) {
+ _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+
+ r = find_device(*p, NULL, &device);
+ if (r < 0) {
+ if (r == -EINVAL)
+ log_error_errno(r, "Bad argument \"%s\", expected an absolute path in /dev/ or /sys/ or a unit name: %m", *p);
+ else
+ log_error_errno(r, "Unknown device \"%s\": %m", *p);
+
+ if (ret == 0)
+ ret = r;
+ continue;
+ }
+
+ 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 if (action == ACTION_TREE)
+ r = print_tree(device);
+ else
+ assert_not_reached();
+ if (r < 0)
+ return r;
+ }
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 09:38:51 +0000