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libudev: device - lookup subsystem and devtype together

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This commit is contained in:
Marcel Holtmann 2009-01-03 11:10:10 +01:00 committed by Kay Sievers
parent b92511747a
commit 883012d49b
3 changed files with 15 additions and 6 deletions
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2
udev/lib/exported_symbols
View File

@ -17,7 +17,7 @@ udev_device_new_from_devnum
udev_device_new_from_subsystem_sysname
udev_device_get_parent
udev_device_get_parent_with_subsystem
udev_device_get_parent_with_devtype
udev_device_get_parent_with_subsystem_devtype
udev_device_ref
udev_device_unref
udev_device_get_udev

17
udev/lib/libudev-device.c
View File

@ -557,17 +557,26 @@ struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *ud
return parent;
}
struct udev_device *udev_device_get_parent_with_devtype(struct udev_device *udev_device, const char *devtype)
struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype)
{
struct udev_device *parent;
if (subsystem == NULL)
return NULL;
parent = udev_device_get_parent(udev_device);
while (parent != NULL) {
const char *parent_subsystem;
const char *parent_devtype;
parent_devtype = udev_device_get_devtype(parent);
if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
break;
parent_subsystem = udev_device_get_subsystem(parent);
if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) {
if (devtype == NULL)
break;
parent_devtype = udev_device_get_devtype(parent);
if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
break;
}
parent = udev_device_get_parent(parent);
}
return parent;

2
udev/lib/libudev.h
View File

@ -63,7 +63,7 @@ extern struct udev_device *udev_device_new_from_devnum(struct udev *udev, char t
extern struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname);
extern struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
extern struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *udev_device, const char *subsystem);
extern struct udev_device *udev_device_get_parent_with_devtype(struct udev_device *udev_device, const char *devtype);
extern struct udev_device *udev_device_get_parent_with_subsytem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype);
extern struct udev_device *udev_device_ref(struct udev_device *udev_device);
extern void udev_device_unref(struct udev_device *udev_device);
extern struct udev *udev_device_get_udev(struct udev_device *udev_device);