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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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KEYCTL_SET_REQKEY_KEYRING(2const) KEYCTL_SET_REQKEY_KEYRING(2const)
KEYCTL_SET_REQKEY_KEYRING - set the implicit destination keyring
Standard C library (libc, -lc)
#include <linux/keyctl.h> /* Definition of KEY* constants */
#include <sys/syscall.h> /* Definition of SYS_* constants */
#include <unistd.h>
long syscall(SYS_keyctl, KEYCTL_SET_REQKEY_KEYRING, int op);
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; see request_key(2) for details.
The op 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
of fork(2) and preserved across execve(2).
On success, the ID of the previous default keyring to which
implicitly requested keys were linked (one of
KEY_REQKEY_DEFL_USER_*).
On error, -1 is returned, and errno is set to indicate the error.
A wrapper is provided in the libkeyutils library:
keyctl_set_reqkey_keyring(3)
Linux.
Linux 2.6.13.
keyctl(2), keyctl_set_reqkey_keyring(3)
This page is part of the man-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 is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-1K7EYCTL_SET_REQKEY_KEYRING(2const)
Pages that refer to this page: keyctl(2)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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