Movatterモバイル変換

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 ofKEY*constants */#include <sys/syscall.h>/* Definition ofSYS_*constants */#include <unistd.h>long syscall(SYS_keyctl, KEYCTL_UNLINK, key_serial_tkey,key_serial_tkeyring);

DESCRIPTION        top

       Unlink a key from a keyring.       The ID of the key to be unlinked is specified inkey; the ID of       the keyring from which it is to be unlinked is specified inkeyring.       If the key is not currently linked into the keyring, an error       results.       The caller must havewrite 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, anderrno is set to indicate the error.

ERRORS        top

ENOENTThe key to be unlinked isn't linked to the keyring.

VERSIONS        top

       A wrapper is provided in thelibkeyutils 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

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17KEYCTL_UNLINK(2const)

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

HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH.