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KEYCTL_SET_REQKEY_KEYRING(2const) — Linux manual page

KEYCTL_SET_REQKEY_KEYRING(2const)KEYCTL_SET_REQKEY_KEYRING(2const)

NAME        top

       KEYCTL_SET_REQKEY_KEYRING - set the implicit destination 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_SET_REQKEY_KEYRING, intop);

DESCRIPTION        top

       Set the default keyring to which implicitly requested keys will be       linked for this thread, and return the previous setting.  Implicit       key requests are those made by internal kernel components, such as       can occur when, for example, opening files on an AFS or NFS       filesystem.  Setting the default keyring also has an effect when       requesting a key from user space; seerequest_key(2) for details.       Theop argument should contain one of the following values, to       specify the new default keyring:KEY_REQKEY_DEFL_NO_CHANGE              Don't change the default keyring.  This can be used to              discover the current default keyring (without changing it).KEY_REQKEY_DEFL_DEFAULT              This selects the default behaviour, which is to use the              thread-specific keyring if there is one, otherwise the              process-specific keyring if there is one, otherwise the              session keyring if there is one, otherwise the UID-specific              session keyring, otherwise the user-specific keyring.KEY_REQKEY_DEFL_THREAD_KEYRING              Use the thread-specific keyring (thread-keyring(7)) as the              new default keyring.KEY_REQKEY_DEFL_PROCESS_KEYRING              Use the process-specific keyring (process-keyring(7)) as              the new default keyring.KEY_REQKEY_DEFL_SESSION_KEYRING              Use the session-specific keyring (session-keyring(7)) as              the new default keyring.KEY_REQKEY_DEFL_USER_KEYRING              Use the UID-specific keyring (user-keyring(7)) as the new              default keyring.KEY_REQKEY_DEFL_USER_SESSION_KEYRING              Use the UID-specific session keyring              (user-session-keyring(7)) as the new default keyring.KEY_REQKEY_DEFL_REQUESTOR_KEYRING(since Linux 2.6.29)              Use the requestor keyring.       All other values are invalid.       The setting controlled by this operation is inherited by the child       offork(2) and preserved acrossexecve(2).

RETURN VALUE        top

       On success, the ID of the previous default keyring to which       implicitly requested keys were linked (one ofKEY_REQKEY_DEFL_USER_*).       On error, -1 is returned, anderrno is set to indicate the error.

VERSIONS        top

       A wrapper is provided in thelibkeyutils library:keyctl_set_reqkey_keyring(3)

STANDARDS        top

       Linux.

HISTORY        top

       Linux 2.6.13.

SEE ALSO        top

keyctl(2),keyctl_set_reqkey_keyring(3)

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            2025-05-1K7EYCTL_SET_REQKEY_KEYRING(2const)

Pages that refer to this page:keyctl(2)

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