* same /dev/disk/by-label/xxx link because they have
* the same label. We want to make sure that the same
* device that won the symlink wins in systemd, so we
- * check the device node major/minor*/
+ * check the device node major/minor */
if (stat(p, &st) >= 0)
if ((!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) ||
st.st_rdev != udev_device_get_devnum(dev))
static RATELIMIT_DEFINE(limit, 10*USEC_PER_SEC, 5);
if (!ratelimit_test(&limit))
- log_error("Failed to get udev event: %m");
+ log_error_errno(errno, "Failed to get udev event: %m");
if (!(revents & EPOLLIN))
return 0;
}
return 0;
}
+static bool device_supported(Manager *m) {
+ static int read_only = -1;
+ assert(m);
+
+ /* If /sys is read-only we don't support device units, and any
+ * attempts to start one should fail immediately. */
+
+ if (read_only < 0)
+ read_only = path_is_read_only_fs("/sys");
+
+ return read_only <= 0;
+}
+
static const char* const device_state_table[_DEVICE_STATE_MAX] = {
[DEVICE_DEAD] = "dead",
[DEVICE_PLUGGED] = "plugged"
.enumerate = device_enumerate,
.shutdown = device_shutdown,
+ .supported = device_supported,
.status_message_formats = {
.starting_stopping = {