keyctl_session_to_parent(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | LINKING | SEE ALSO | COLOPHON

KEYCTL_SESSION_TO_PARENT(3)x Key Management CallsTL_SESSION_TO_PARENT(3)

NAME         top

       keyctl_session_to_parent - set the parent process's session
       keyring

SYNOPSIS         top

       #include <keyutils.h>

       long keyctl_session_to_parent();

DESCRIPTION         top

       keyctl_session_to_parent() changes the session keyring to which
       the calling process's parent subscribes to be the that of the
       calling process.

       The keyring must have link permission available to the calling
       process, the parent process must have the same UIDs/GIDs as the
       calling process, and the LSM must not reject the replacement.
       Furthermore, this may not be used to affect init or a kernel
       thread.

       Note that the replacement will not take immediate effect upon the
       parent process, but will rather be deferred to the next time it
       returns to userspace from kernel space.

RETURN VALUE         top

       On success keyctl_session_to_parent() returns 0.  On error, the
       value -1 will be returned and errno will have been set to an
       appropriate error.

ERRORS         top

       ENOMEM Insufficient memory to create a key.

       EPERM  The credentials of the parent don't match those of the
              caller.

       EACCES The named keyring exists, but is not linkable by the
              calling process.

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), session-keyring(7),
       user-session-keyring(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 man-pages@man7.org] If you have a
       bug report for this manual page, send it to
       keyrings@linux-nfs.org.  This page was obtained from the
       project's upstream Git repository
       ⟨http://git.kernel.org/pub/scm/linux/kernel/git/dhowells/keyutils.git⟩
       on 2021-08-27.  (At that time, the date of the most recent commit
       that was found in the repository was 2020-07-07.)  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                          20 Feb 2014   KEYCTL_SESSION_TO_PARENT(3)

Pages that refer to this page: keyctl(2)keyctl(3)session-keyring(7)