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   keyctl_restrict_keyring    ( 3 )

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Имя (Name)

keyctl_restrict_keyring - restrict keys that may be linked to a
       keyring

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Синопсис (Synopsis)

#include <keyutils.h>

       long keyctl_restrict_keyring(key_serial_t keyring,
       const char *type, const char *restriction);

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Описание (Description)

keyctl_restrict_keyring() limits the linkage of keys to the given
       keyring using a provided key type and restriction scheme. The
       available options vary depending on the key type, and typically
       contain a restriction name possibly followed by key ids or other
       data relevant to the restriction. If the type and restriction are
       both NULL, the keyring will reject all links.

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Возвращаемое значение (Return value)

On success keyctl_restrict_keyring() returns 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)

EDEADLK
              A restriction cycle was avoided. Two keyrings cannot
              restrict each other.

       EEXIST The keyring is already restricted.

       EINVAL The restriction string is invalid or too large.

       ENOKEY The key type in the restriction is invalid or not
              available.

       ENOTDIR
              The provided key id references an item that is not a
              keyring.

       ENOENT The key type exists but does not support restrictions.

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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), keyctl(2), keyctl(3), keyutils(7)

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