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   keyctl_link    ( 3 )

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Имя (Name)

keyctl_link, keyctl_unlink - link/unlink a key to/from a keyring

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Синопсис (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);

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Описание (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 to
       create or remove links in it.

       The caller must have link permission on a key to be able to
       create a link to it.

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Возвращаемое значение (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.

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Ошибки (Error)

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              The key or the keyring specified have been revoked.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.

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Ссылки (Linking)

This is a library function that can be found in libkeyutils.
       When linking, -lkeyutils should be specified to the linker.

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Смотри также (See also)

keyctl(1), add_key(2), keyctl(2), request_key(2), keyctl(3),
       keyrings(7), keyutils(7)

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