chiark / gitweb /
[PATCH] provide temporary device node for callouts to access the device
[elogind.git] / namedev.c
index 0c5d050..332e2d5 100644 (file)
--- a/namedev.c
+++ b/namedev.c
@@ -201,6 +201,12 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
 
 
                switch (c) {
+               case 'p':
+                       if (strlen(udev->devpath) == 0)
+                               break;
+                       strfieldcatmax(string, udev->devpath, maxsize);
+                       dbg("substitute kernel name '%s'", udev->kernel_name);
+                       break;
                case 'b':
                        if (strlen(udev->bus_id) == 0)
                                break;
@@ -290,6 +296,15 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
                                strfieldcatmax(string, temp2, maxsize);
                        }
                        break;
+               case 'N':
+                       if (udev->tmp_node[0] == '\0') {
+                               dbg("create temporary device node for callout");
+                               snprintf(udev->tmp_node, NAME_SIZE-1, "%s/.tmp-%u-%u", udev_root, udev->major, udev->minor);
+                               udev_make_node(udev, udev->tmp_node, udev->major, udev->minor, 0600, 0, 0);
+                       }
+                       strfieldcatmax(string, udev->tmp_node, maxsize);
+                       dbg("substitute temporary device node name '%s'", udev->tmp_node);
+                       break;
                default:
                        dbg("unknown substitution type '%%%c'", c);
                        break;
@@ -787,5 +802,11 @@ int namedev_name_device(struct udevice *udev, struct sysfs_class_device *class_d
        dbg("no rule found, use kernel name '%s'", udev->name);
 
 exit:
+       if (udev->tmp_node[0] != '\0') {
+               dbg("removing temporary device node");
+               unlink_secure(udev->tmp_node);
+               udev->tmp_node[0] = '\0';
+       }
+
        return 0;
 }