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KEYCTL
Section: Linux Key Management Calls (2)
Updated: 2010-02-25
Index
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NAME
keyctl - Manipulate the kernel's key management facility
SYNOPSIS
#include <keyutils.h>
long keyctl(int cmd, ...);
DESCRIPTION
keyctl()
has a number of functions available:
- KEYCTL_GET_KEYRING_ID
-
Ask for a keyring's ID.
- KEYCTL_JOIN_SESSION_KEYRING
-
Join or start named session keyring.
- KEYCTL_UPDATE
-
Update a key.
- KEYCTL_REVOKE
-
Revoke a key.
- KEYCTL_CHOWN
-
Set ownership of a key.
- KEYCTL_SETPERM
-
Set perms on a key.
- KEYCTL_DESCRIBE
-
Describe a key.
- KEYCTL_CLEAR
-
Clear contents of a keyring.
- KEYCTL_LINK
-
Link a key into a keyring.
- KEYCTL_UNLINK
-
Unlink a key from a keyring.
- KEYCTL_SEARCH
-
Search for a key in a keyring.
- KEYCTL_READ
-
Read a key or keyring's contents.
- KEYCTL_INSTANTIATE
-
Instantiate a partially constructed key.
- KEYCTL_NEGATE
-
Negate a partially constructed key.
- KEYCTL_SET_REQKEY_KEYRING
-
Set default request-key keyring.
- KEYCTL_SET_TIMEOUT
-
Set timeout on a key.
- KEYCTL_ASSUME_AUTHORITY
-
Assume authority to instantiate key.
These are wrapped by
libkeyutils
into individual functions to permit compiler the compiler to check types.
See the
See Also
section at the bottom.
RETURN VALUE
On success
keyctl()
returns the serial number of the key it found.
On error, the value
-1
will be returned and errno will have been set to an appropriate error.
ERRORS
- ENOKEY
-
No matching key was found or an invalid key was specified.
- EKEYEXPIRED
-
An expired key was found or specified.
- EKEYREVOKED
-
A revoked key was found or specified.
- EKEYREJECTED
-
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
libc
but can be found rather in
libkeyutils.
When linking,
-lkeyutils
should be specified to the linker.
SEE ALSO
keyctl(1),
add_key(2),
request_key(2),
keyctl_get_keyring_ID(3),
keyctl_join_session_keyring(3),
keyctl_update(3),
keyctl_revoke(3),
keyctl_chown(3),
keyctl_setperm(3),
keyctl_describe(3),
keyctl_clear(3),
keyctl_link(3),
keyctl_unlink(3),
keyctl_search(3),
keyctl_read(3),
keyctl_instantiate(3),
keyctl_negate(3),
keyctl_set_reqkey_keyring(3),
keyctl_set_timeout(3),
keyctl_assume_authority(3),
keyctl_describe_alloc(3),
keyctl_read_alloc(3),
request-key(8)
COLOPHON
This page is part of release 3.27 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- LINKING
-
- SEE ALSO
-
- COLOPHON
-
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