keyctl_get_keyring_ID(3) — Linux manual page


KEYCTL_...YRING_ID(3)  Linux Key Management Calls  KEYCTL_...YRING_ID(3)

NAME         top

       keyctl_get_keyring_ID - get the ID of a special keyring

SYNOPSIS         top

       #include <keyutils.h>

       key_serial_t keyctl_get_keyring_ID(key_serial_t key,
        int create);

DESCRIPTION         top

       keyctl_get_keyring_ID() maps a special key or keyring ID to the
       serial number of the key actually representing that feature.  The
       serial number will be returned if that key exists.

       If the key or keyring does not yet exist, then if create is non-
       zero, the key or keyring will be created if it is appropriate to
       do so.

       The following special key IDs may be specified as key:

              This specifies the caller's thread-specific keyring.

              This specifies the caller's process-specific keyring.

              This specifies the caller's session-specific keyring.

              This specifies the caller's UID-specific keyring.

              This specifies the caller's UID-session keyring.

              This specifies the authorisation key created by
              request_key() and passed to the process it spawns to
              generate a key.

       If a valid keyring ID is passed in, then this will simply be
       returned if the key exists; an error will be issued if it doesn't

RETURN VALUE         top

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

ERRORS         top

       ENOKEY No matching key was found.

       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.

LINKING         top

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

SEE ALSO         top

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

COLOPHON         top

       This page is part of the keyutils (key management utilities)
       project.  Information about the project can be found at [unknown
       -- if you know, please contact] If you have a
       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       on 2023-12-22.  (At that time, the date of the most recent commit
       that was found in the repository was 2023-03-20.)  If you
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Linux                          4 May 2006          KEYCTL_...YRING_ID(3)

Pages that refer to this page: keyctl(2)keyctl(3)