Changes in uspace/lib/c/generic/devman.c [e72fb34:852803a] in mainline

File:

• uspace/lib/c/generic/devman.c (modified) (1 diff)

uspace/lib/c/generic/devman.c

@@ -374 +374 @@
 }
 
+int devman_get_device_path(devman_handle_t handle, char *path, size_t path_size)
+{
+        int phone = devman_get_phone(DEVMAN_CLIENT, 0);
+
+        if (phone < 0)
+                return phone;
+
+        async_serialize_start();
+
+        ipc_call_t answer;
+        aid_t req = async_send_1(phone, DEVMAN_DEVICE_GET_DEVICE_PATH,
+            handle, &answer);
+
+        ipc_call_t data_request_call;
+        aid_t data_request = async_data_read(phone, path, path_size,
+            &data_request_call);
+        if (data_request == 0) {
+                async_wait_for(req, NULL);
+                async_serialize_end();
+                return ENOMEM;
+        }
+
+        sysarg_t data_request_rc;
+        sysarg_t opening_request_rc;
+        async_wait_for(data_request, &data_request_rc);
+        async_wait_for(req, &opening_request_rc);
+
+        async_serialize_end();
+
+        if (data_request_rc != EOK) {
+                /* Prefer the return code of the opening request. */
+                if (opening_request_rc != EOK) {
+                        return (int) opening_request_rc;
+                } else {
+                        return (int) data_request_rc;
+                }
+        }
+        if (opening_request_rc != EOK) {
+                return (int) opening_request_rc;
+        }
+
+        /* To be on the safe-side. */
+        path[path_size - 1] = 0;
+
+        size_t transferred_size = IPC_GET_ARG2(data_request_call);
+
+        if (transferred_size >= path_size) {
+                return ELIMIT;
+        }
+
+        /* Terminate the string (trailing 0 not send over IPC). */
+        path[transferred_size] = 0;
+
+        return EOK;
+}
+
 
 /** @}