1KEYCTL_GET_KEYRING_ID(3)  Linux Key Management Calls  KEYCTL_GET_KEYRING_ID(3)
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NAME

6       keyctl_get_keyring_ID - get the ID of a special keyring
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SYNOPSIS

9       #include <keyutils.h>
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11       key_serial_t keyctl_get_keyring_ID(key_serial_t key,
12        int create);
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DESCRIPTION

15       keyctl_get_keyring_ID()  maps a special key or keyring ID to the serial
16       number of the key actually representing that feature.  The serial  num‐
17       ber will be returned if that key exists.
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19       If  the  key or keyring does not yet exist, then if create is non-zero,
20       the key or keyring will be created if it is appropriate to do so.
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22       The following special key IDs may be specified as key:
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24       KEY_SPEC_THREAD_KEYRING
25              This specifies the caller's thread-specific keyring.
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27       KEY_SPEC_PROCESS_KEYRING
28              This specifies the caller's process-specific keyring.
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30       KEY_SPEC_SESSION_KEYRING
31              This specifies the caller's session-specific keyring.
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33       KEY_SPEC_USER_KEYRING
34              This specifies the caller's UID-specific keyring.
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36       KEY_SPEC_USER_SESSION_KEYRING
37              This specifies the caller's UID-session keyring.
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39       KEY_SPEC_REQKEY_AUTH_KEY
40              This specifies the authorisation key  created  by  request_key()
41              and passed to the process it spawns to generate a key.
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43       If  a  valid keyring ID is passed in, then this will simply be returned
44       if the key exists; an error will be issued if it doesn't exist.
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RETURN VALUE

47       On success keyctl_get_keyring_ID() returns the serial number of the key
48       it  found.  On error, the value -1 will be returned and errno will have
49       been set to an appropriate error.
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ERRORS

52       ENOKEY No matching key was found.
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54       ENOMEM Insufficient memory to create a key.
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56       EDQUOT The key quota for this user would be exceeded by  creating  this
57              key or linking it to the keyring.
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LINKING

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

64       keyctl(1), add_key(2), keyctl(2), request_key(2), keyctl(3),
65       keyrings(7), keyutils(7)
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69Linux                             4 May 2006          KEYCTL_GET_KEYRING_ID(3)
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