/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
-#include <string.h>
#include "alloc-util.h"
-#include "fileio.h"
+#include "device-util.h"
+#include "env-file.h"
#include "log.h"
+#include "parse-util.h"
+#include "signal-util.h"
+#include "string-table.h"
#include "string-util.h"
#include "udev-util.h"
-int udev_parse_config(void) {
- _cleanup_free_ char *val = NULL;
- const char *log;
- size_t n;
+static const char* const resolve_name_timing_table[_RESOLVE_NAME_TIMING_MAX] = {
+ [RESOLVE_NAME_NEVER] = "never",
+ [RESOLVE_NAME_LATE] = "late",
+ [RESOLVE_NAME_EARLY] = "early",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(resolve_name_timing, ResolveNameTiming);
+
+int udev_parse_config_full(
+ unsigned *ret_children_max,
+ usec_t *ret_exec_delay_usec,
+ usec_t *ret_event_timeout_usec,
+ ResolveNameTiming *ret_resolve_name_timing,
+ int *ret_timeout_signal) {
+
+ _cleanup_free_ char *log_val = NULL, *children_max = NULL, *exec_delay = NULL, *event_timeout = NULL, *resolve_names = NULL, *timeout_signal = NULL;
int r;
- r = parse_env_file(NULL, "/etc/udev/udev.conf", NEWLINE, "udev_log", &val, NULL);
- if (r == -ENOENT || !val)
+ r = parse_env_file(NULL, "/etc/udev/udev.conf",
+ "udev_log", &log_val,
+ "children_max", &children_max,
+ "exec_delay", &exec_delay,
+ "event_timeout", &event_timeout,
+ "resolve_names", &resolve_names,
+ "timeout_signal", &timeout_signal);
+ if (r == -ENOENT)
return 0;
if (r < 0)
return r;
- /* unquote */
- n = strlen(val);
- if (n >= 2 &&
- ((val[0] == '"' && val[n-1] == '"') ||
- (val[0] == '\'' && val[n-1] == '\''))) {
- val[n - 1] = '\0';
- log = val + 1;
- } else
- log = val;
-
- /* we set the udev log level here explicitly, this is supposed
- * to regulate the code in libudev/ and udev/. */
- r = log_set_max_level_from_string_realm(LOG_REALM_UDEV, log);
+ if (log_val) {
+ const char *log;
+ size_t n;
+
+ /* unquote */
+ n = strlen(log_val);
+ if (n >= 2 &&
+ ((log_val[0] == '"' && log_val[n-1] == '"') ||
+ (log_val[0] == '\'' && log_val[n-1] == '\''))) {
+ log_val[n - 1] = '\0';
+ log = log_val + 1;
+ } else
+ log = log_val;
+
+ /* we set the udev log level here explicitly, this is supposed
+ * to regulate the code in libudev/ and udev/. */
+ r = log_set_max_level_from_string_realm(LOG_REALM_UDEV, log);
+ if (r < 0)
+ log_syntax(NULL, LOG_WARNING, "/etc/udev/udev.conf", 0, r,
+ "failed to set udev log level '%s', ignoring: %m", log);
+ }
+
+ if (ret_children_max && children_max) {
+ r = safe_atou(children_max, ret_children_max);
+ if (r < 0)
+ log_syntax(NULL, LOG_WARNING, "/etc/udev/udev.conf", 0, r,
+ "failed to parse children_max=%s, ignoring: %m", children_max);
+ }
+
+ if (ret_exec_delay_usec && exec_delay) {
+ r = parse_sec(exec_delay, ret_exec_delay_usec);
+ if (r < 0)
+ log_syntax(NULL, LOG_WARNING, "/etc/udev/udev.conf", 0, r,
+ "failed to parse exec_delay=%s, ignoring: %m", exec_delay);
+ }
+
+ if (ret_event_timeout_usec && event_timeout) {
+ r = parse_sec(event_timeout, ret_event_timeout_usec);
+ if (r < 0)
+ log_syntax(NULL, LOG_WARNING, "/etc/udev/udev.conf", 0, r,
+ "failed to parse event_timeout=%s, ignoring: %m", event_timeout);
+ }
+
+ if (ret_resolve_name_timing && resolve_names) {
+ ResolveNameTiming t;
+
+ t = resolve_name_timing_from_string(resolve_names);
+ if (t < 0)
+ log_syntax(NULL, LOG_WARNING, "/etc/udev/udev.conf", 0, r,
+ "failed to parse resolve_names=%s, ignoring.", resolve_names);
+ else
+ *ret_resolve_name_timing = t;
+ }
+
+ if (ret_timeout_signal && timeout_signal) {
+ r = signal_from_string(timeout_signal);
+ if (r < 0)
+ log_syntax(NULL, LOG_WARNING, "/etc/udev/udev.conf", 0, r,
+ "failed to parse timeout_signal=%s, ignoring: %m", timeout_signal);
+ else
+ *ret_timeout_signal = r;
+ }
+
+ return 0;
+}
+
+struct DeviceMonitorData {
+ const char *sysname;
+ sd_device *device;
+};
+
+static int device_monitor_handler(sd_device_monitor *monitor, sd_device *device, void *userdata) {
+ struct DeviceMonitorData *data = userdata;
+ const char *sysname;
+
+ assert(device);
+ assert(data);
+ assert(data->sysname);
+ assert(!data->device);
+
+ if (sd_device_get_sysname(device, &sysname) >= 0 && streq(sysname, data->sysname)) {
+ data->device = sd_device_ref(device);
+ return sd_event_exit(sd_device_monitor_get_event(monitor), 0);
+ }
+
+ return 0;
+}
+
+static int device_timeout_handler(sd_event_source *s, uint64_t usec, void *userdata) {
+ return sd_event_exit(sd_event_source_get_event(s), -ETIMEDOUT);
+}
+
+int device_wait_for_initialization(sd_device *device, const char *subsystem, usec_t timeout, sd_device **ret) {
+ _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor = NULL;
+ _cleanup_(sd_event_source_unrefp) sd_event_source *timeout_source = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ struct DeviceMonitorData data = {};
+ int r;
+
+ assert(device);
+
+ if (sd_device_get_is_initialized(device) > 0) {
+ if (ret)
+ *ret = sd_device_ref(device);
+ return 0;
+ }
+
+ assert_se(sd_device_get_sysname(device, &data.sysname) >= 0);
+
+ /* Wait until the device is initialized, so that we can get access to the ID_PATH property */
+
+ r = sd_event_new(&event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get default event: %m");
+
+ r = sd_device_monitor_new(&monitor);
+ if (r < 0)
+ return log_error_errno(r, "Failed to acquire monitor: %m");
+
+ if (!subsystem) {
+ r = sd_device_get_subsystem(device, &subsystem);
+ if (r < 0 && r != -ENOENT)
+ return log_device_error_errno(device, r, "Failed to get subsystem: %m");
+ }
+
+ if (subsystem) {
+ r = sd_device_monitor_filter_add_match_subsystem_devtype(monitor, subsystem, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add %s subsystem match to monitor: %m", subsystem);
+ }
+
+ r = sd_device_monitor_attach_event(monitor, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to attach event to device monitor: %m");
+
+ r = sd_device_monitor_start(monitor, device_monitor_handler, &data);
+ if (r < 0)
+ return log_error_errno(r, "Failed to start device monitor: %m");
+
+ if (timeout != USEC_INFINITY) {
+ r = sd_event_add_time_relative(
+ event, &timeout_source,
+ CLOCK_MONOTONIC, timeout, 0,
+ device_timeout_handler, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add timeout event source: %m");
+ }
+
+ /* Check again, maybe things changed. Udev will re-read the db if the device wasn't initialized
+ * yet. */
+ if (sd_device_get_is_initialized(device) > 0) {
+ if (ret)
+ *ret = sd_device_ref(device);
+ return 0;
+ }
+
+ r = sd_event_loop(event);
if (r < 0)
- log_debug_errno(r, "/etc/udev/udev.conf: failed to set udev log level '%s', ignoring: %m", log);
+ return log_error_errno(r, "Failed to wait for device to be initialized: %m");
+ if (ret)
+ *ret = TAKE_PTR(data.device);
return 0;
}
+
+int device_is_renaming(sd_device *dev) {
+ int r;
+
+ assert(dev);
+
+ r = sd_device_get_property_value(dev, "ID_RENAMING", NULL);
+ if (r < 0 && r != -ENOENT)
+ return r;
+
+ return r >= 0;
+}
+
+bool device_for_action(sd_device *dev, DeviceAction action) {
+ DeviceAction a;
+
+ assert(dev);
+
+ if (device_get_action(dev, &a) < 0)
+ return false;
+
+ return a == action;
+}
projects / thirdparty / systemd.git / blobdiff