The Linux Kernel API
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devfs_get_handle

Name

devfs_get_handle --  Find the handle of a devfs entry.

Synopsis

devfs_handle_t devfs_get_handle (devfs_handle_t dir, const char * name, unsigned int major, unsigned int minor, char type, int traverse_symlinks);

Arguments

dir

The handle to the parent devfs directory entry. If this is NULL the name is relative to the root of the devfs.

name

The name of the entry.

major

The major number. This is used if name is NULL.

minor

The minor number. This is used if name is NULL.

type

The type of special file to search for. This may be either DEVFS_SPECIAL_CHR or DEVFS_SPECIAL_BLK.

traverse_symlinks

If TRUE then symlink entries in the devfs namespace are traversed. Symlinks pointing out of the devfs namespace will cause a failure. Symlink traversal consumes stack space.

Description

Returns a handle which may later be used in a call to devfs_unregister, devfs_get_flags, or devfs_set_flags. A subsequent devfs_put is required to decrement the refcount. On failure NULL is returned.

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