keyctl_link(3) [linux man page]
KEYCTL_LINK(3) Linux Key Management Calls KEYCTL_LINK(3) NAME
keyctl_link - Link a key to a keyring keyctl_unlink - Unlink a key from a keyring SYNOPSIS
#include <keyutils.h> long keyctl_link(key_serial_t key, key_serial_t keyring); long keyctl_unlink(key_serial_t key, key_serial_t keyring); DESCRIPTION
keyctl_link() creates a link from keyring to key, displacing any link to another key of the same type and description in that keyring if one exists. keyctl_unlink() removes the link from keyring to key if it exists. The caller must have write permission on a keyring to be able create or remove links in it. The caller must have link permission on a key to be able to create a link to it. RETURN VALUE
On success keyctl_link() and keyctl_unlink() return 0. On error, the value -1 will be returned and errno will have been set to an appro- priate error. ERRORS
ENOKEY The key or the keyring specified are invalid. EKEYEXPIRED The key or the keyring specified have expired. EKEYREVOKED The key or the keyring specified have been revoked. EACCES The keyring exists, but is not writable by the calling process. For keyctl_link() only: ENOMEM Insufficient memory to expand the keyring EDQUOT Expanding the keyring would exceed the keyring owner's quota. EACCES The key exists, but is not linkable by the calling process. LINKING
This is a library function that can be found in libkeyutils. When linking, -lkeyutils should be specified to the linker. SEE ALSO
keyctl(1), add_key(2), keyctl(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_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) Linux 4 May 2006 KEYCTL_LINK(3)
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KEYCTL_JOIN_SESSION_KEYRING(3) Linux Key Management Calls KEYCTL_JOIN_SESSION_KEYRING(3) NAME
keyctl_join_session_keyring - Join a different session keyring SYNOPSIS
#include <keyutils.h> key_serial_t keyctl_join_session_keyring(const char *name); DESCRIPTION
keyctl_join_session_keyring() changes the session keyring to which a process is subscribed. If name is NULL then a new anonymous keyring will be created, and the process will be subscribed to that. If name points to a string, then if a keyring of that name is available, the process will attempt to subscribe to that keyring, giving an error if that is not permitted; otherwise a new keyring of that name is created and attached as the session keyring. To attach to an extant named keyring, the keyring must have search permission available to the calling process. RETURN VALUE
On success keyctl_join_session_keyring() returns the serial number of the key it found or created. On error, the value -1 will be returned and errno will have been set to an appropriate error. ERRORS
ENOMEM Insufficient memory to create a key. EDQUOT The key quota for this user would be exceeded by creating this key or linking it to the keyring. EACCES The named keyring exists, but is not searchable by the calling process. LINKING
This is a library function that can be found in libkeyutils. When linking, -lkeyutils should be specified to the linker. SEE ALSO
keyctl(1), add_key(2), keyctl(2), request_key(2), keyctl_get_keyring_ID(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) Linux 4 May 2006 KEYCTL_JOIN_SESSION_KEYRING(3)