keyctl -%uA0操作内核的密钥管理工具

内容简介

#include <keyutils.h>

long keyctl(int cmd, ...)

描述

keyctl()%uA0有许多功能可用：

标签	描述
KEYCTL_GET_KEYRING_ID
%uA0	Ask for a keyring’s ID.
KEYCTL_JOIN_SESSION_KEYRING
%uA0	Join or start named session keyring.
KEYCTL_UPDATE
%uA0	Update a key.
KEYCTL_REVOKE
%uA0	Revoke a key.
KEYCTL_CHOWN
%uA0	Set ownership of a key.
KEYCTL_SETPERM
%uA0	Set perms on a key.
KEYCTL_DESCRIBE
%uA0	Describe a key.
KEYCTL_CLEAR
%uA0	Clear contents of a keyring.
KEYCTL_LINK
%uA0	Link a key into a keyring.
KEYCTL_UNLINK
%uA0	Unlink a key from a keyring.
KEYCTL_SEARCH
%uA0	Search for a key in a keyring.
KEYCTL_READ
%uA0	Read a key or keyring’s contents.
KEYCTL_INSTANTIATE
%uA0	Instantiate a partially constructed key.
KEYCTL_NEGATE
%uA0	Negate a partially constructed key.
KEYCTL_SET_REQKEY_KEYRING
%uA0	Set default request-key keyring.
KEYCTL_SET_TIMEOUT
%uA0	Set timeout on a key.
KEYCTL_ASSUME_AUTHORITY
%uA0	Assume authority to instantiate key.

These are wrapped by%uA0libkeyutils%uA0into individual functions to permit compiler the compiler to check types. See the%uA0See Also%uA0section at the bottom.

返回值

On success%uA0keyctl() returns the serial number of the key it found. On error, the value%uA0-1will be returned and errno will have been set to an appropriate error.

错误

标签	描述
ENOKEY	No matching key was found or an invalid key was specified.
EKEYEXPIRED
%uA0	An expired key was found or specified.
EKEYREVOKED
%uA0	A revoked key was found or specified.
EKEYREJECTED
%uA0	A rejected key was found or specified.
EDQUOT	The key quota for the caller’s user would be exceeded by creating a key or linking it to the keyring.
EACCES	A key operation wasn’t permitted.

LINKING

Although this is a Linux system call, it is not present in%uA0libc%uA0but can be found rather inlibkeyutils. When linking,%uA0-lkeyutils%uA0should be specified to the linker.

另请参阅

keyctl (1)

add_key(2),%uA0 request_key(2),%uA0 keyctl_get_keyring_ID(3),%uA0 keyctl_join_session_keyring(3),%uA0 keyctl_update(3),%uA0 keyctl_revoke(3),%uA0 keyctl_chown(3),%uA0 keyctl_setperm(3),%uA0 keyctl_describe(3),%uA0 keyctl_clear(3),%uA0 keyctl_link(3),%uA0 keyctl_unlink(3),%uA0 keyctl_search(3),%uA0 keyctl_read(3),%uA0 keyctl_instantiate(3),%uA0 keyctl_negate(3),%uA0 keyctl_set_reqkey_keyring(3),%uA0 keyctl_set_timeout(3),%uA0 keyctl_assume_authority(3),%uA0 keyctl_describe_alloc(3),%uA0 keyctl_read_alloc(3),%uA0 request-key(8)%uA0

零教程

全部教程

Unix/Linux系统调用

内容简介

描述

返回值

错误

LINKING

另请参阅