keyctl_session_to_parent(3) — Linux manual page


KEYCTL_S...O_PARENT(3) Linux Key Management Calls KEYCTL_S...O_PARENT(3)

NAME         top

       keyctl_session_to_parent - set the parent process's session

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

       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

       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),

COLOPHON         top

       This page is part of the keyutils (key management utilities)
       project.  Information about the project can be found at [unknown
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       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       on 2023-12-22.  (At that time, the date of the most recent commit
       that was found in the repository was 2023-03-20.)  If you
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       manual page), send a mail to

Linux                          20 Feb 2014        KEYCTL_S...O_PARENT(3)

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