key_get_type_from_user

Name:key_get_type_from_user

Proto:static int key_get_type_from_user(char *type, const char __user *_type, unsigned len)

Type:int

Parameter:

Type	Parameter	Name
char *	type
const char __user *	_type
unsigned	len

49

ret = Copy a NUL terminated string from userspace

50

If ret < 0 Then Return ret

52

If ret == 0 || ret >= len Then Return -EINVAL

54

If type[0] == '.' Then Return -EPERM

56

type[len - 1] = '\0'

57

Return 0

**Caller**
Name	Describe
SYSCALL_DEFINE5	Extract the description of a new key from userspace and either add it as a* new key to the specified keyring or update a matching key in that keyring.* If the description is NULL or an empty string, the key type is asked to* generate one from the payload.
SYSCALL_DEFINE4	Search the process keyrings and keyring trees linked from those for a* matching key. Keyrings must have appropriate Search permission to be* searched.* If a key is found, it will be attached to the destination keyring if there's
keyctl_keyring_search	Search the specified keyring and any keyrings it links to for a matching* key
keyctl_restrict_keyring	Apply a restriction to a given keyring.* The caller must have Setattr permission to change keyring restrictions.* The requested type name may be a NULL pointer to reject all attempts* to link to the keyring. In this case, _restriction must also be NULL.

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion