chiark / gitweb /
libudev: add udev_device_get_syspath()
[elogind.git] / udev / lib / libudev-device.c
index f6ad541..c4d65e9 100644 (file)
 #include "libudev-private.h"
 #include "../udev.h"
 
+struct udev_device {
+       int refcount;
+       struct udev *udev;
+       char *devpath;
+       char *syspath;
+       char *devname;
+       char *subsystem;
+       struct list_head link_list;
+       struct list_head env_list;
+};
+
 struct udev_device *device_init(struct udev *udev)
 {
        struct udev_device *udev_device;
@@ -99,7 +110,7 @@ struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *
        /* resolve possible symlink to real path */
        strlcpy(path, devpath, sizeof(path));
        sysfs_resolve_link(path, sizeof(path));
-       udev_device->devpath = strdup(path);
+       device_set_devpath(udev_device, devpath);
        log_info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
 
        err = udev_db_get_device(udevice, path);
@@ -127,6 +138,7 @@ struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *
 
 /**
  * udev_device_get_udev:
+ * @udev_device: udev device
  *
  * Retrieve the udev library context the device was created with.
  *
@@ -170,7 +182,7 @@ void udev_device_unref(struct udev_device *udev_device)
        udev_device->refcount--;
        if (udev_device->refcount > 0)
                return;
-       free(udev_device->devpath);
+       free(udev_device->syspath);
        free(udev_device->devname);
        free(udev_device->subsystem);
        name_list_cleanup(&udev_device->link_list);
@@ -183,10 +195,10 @@ void udev_device_unref(struct udev_device *udev_device)
  * udev_device_get_devpath:
  * @udev_device: udev device
  *
- * Retrieve the sys path of the udev device. The path does not contain
- * the sys mount point.
+ * Retrieve the kernel devpath value of the udev device. The path
+ * does not contain the sys mount point, and starts with a '/'.
  *
- * Returns: the sys path of the udev device
+ * Returns: the devpath of the udev device
  **/
 const char *udev_device_get_devpath(struct udev_device *udev_device)
 {
@@ -196,6 +208,22 @@ const char *udev_device_get_devpath(struct udev_device *udev_device)
 }
 
 /**
+ * udev_device_get_syspath:
+ * @udev_device: udev device
+ *
+ * Retrieve the sys path of the udev device. The path is an
+ * absolute path and starts with the sys mount point.
+ *
+ * Returns: the sys path of the udev device
+ **/
+const char *udev_device_get_syspath(struct udev_device *udev_device)
+{
+       if (udev_device == NULL)
+               return NULL;
+       return udev_device->syspath;
+}
+
+/**
  * udev_device_get_devname:
  * @udev_device: udev device
  *
@@ -304,3 +332,41 @@ int udev_device_get_properties(struct udev_device *udev_device,
        }
        return count;
 }
+
+int device_set_devpath(struct udev_device *udev_device, const char *devpath)
+{
+       if (asprintf(&udev_device->syspath, "%s%s", udev_get_sys_path(udev_device->udev), devpath) < 0)
+               return -ENOMEM;
+       udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))];
+       return 0;
+}
+
+int device_set_subsystem(struct udev_device *udev_device, const char *subsystem)
+{
+       udev_device->subsystem = strdup(subsystem);
+       if (udev_device->subsystem == NULL)
+               return -1;
+       return 0;
+}
+
+int device_set_devname(struct udev_device *udev_device, const char *devname)
+{
+       udev_device->devname = strdup(devname);
+       if (udev_device->devname == NULL)
+               return -ENOMEM;
+       return 0;
+}
+
+int device_add_devlink(struct udev_device *udev_device, const char *devlink)
+{
+       if (name_list_add(&udev_device->link_list, devlink, 0) == NULL)
+               return -ENOMEM;
+       return 0;
+}
+
+int device_add_property(struct udev_device *udev_device, const char *property)
+{
+       if (name_list_add(&udev_device->env_list, property, 0) == NULL)
+               return -ENOMEM;
+       return 0;
+}