KEYCTL_UNLINK(2const) — Linux manual page

KEYCTL_UNLINK(2const)                               KEYCTL_UNLINK(2const)

NAME         top

       KEYCTL_UNLINK - unlink a key from a keyring

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <linux/keyctl.h>  /* Definition of KEY* constants */
       #include <sys/syscall.h>   /* Definition of SYS_* constants */
       #include <unistd.h>

       long syscall(SYS_keyctl, KEYCTL_UNLINK, key_serial_t key,
                    key_serial_t keyring);

DESCRIPTION         top

       Unlink a key from a keyring.

       The ID of the key to be unlinked is specified in key; the ID of
       the keyring from which it is to be unlinked is specified in
       keyring.

       If the key is not currently linked into the keyring, an error
       results.

       The caller must have write permission on the keyring from which
       the key is being removed.

       If the last link to a key is removed, then that key will be
       scheduled for destruction.

RETURN VALUE         top

       On success, 0 is returned.

       On error, -1 is returned, and errno is set to indicate the error.

ERRORS         top

       ENOENT The key to be unlinked isn't linked to the keyring.

VERSIONS         top

       A wrapper is provided in the libkeyutils library:
       keyctl_unlink(3).

STANDARDS         top

       Linux.

HISTORY         top

       Linux 2.6.10.

SEE ALSO         top

       keyctl(2), keyctl_unlink(3), KEYCTL_LINK(2const)

COLOPHON         top

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Linux man-pages 6.10            2024-08-21          KEYCTL_UNLINK(2const)

Pages that refer to this page: keyctl(2),  KEYCTL_LINK(2const),  KEYCTL_SETPERM(2const)

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