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|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
#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 appropriate error.
- The key or the keyring specified are invalid.
- The key or the keyring specified have expired.
- The key or the keyring specified have been revoked.
- The keyring exists, but is not writable by the calling process.
- Insufficient memory to expand the keyring
- Expanding the keyring would exceed the keyring owner's quota.
- 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.
|4 May 2006||Linux|