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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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KEYCTL_SESSION_TO_PARENT(2const) KEYCTL_SESSION_TO_PARENT(2const)
KEYCTL_SESSION_TO_PARENT - set the parent process's session
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>
longsyscall(SYS_keyctl,KEYCTL_SESSION_TO_PARENT);
Replace the session keyring to which the parent of the calling
process subscribes with the session keyring of the calling
process.
The keyring will be replaced in the parent process at the point
where the parent next transitions from kernel space to user space.
The keyring must exist and must grant the caller link permission.
The parent process must be single-threaded and have the same
effective ownership as this process and must not be set-user-ID or
set-group-ID. The UID of the parent process's existing session
keyring (f it has one), as well as the UID of the caller's session
keyring much match the caller's effective UID.
The fact that it is the parent process that is affected by this
operation allows a program such as the shell to start a child
process that uses this operation to change the shell's session
keyring. (This is what the keyctl(1) new_session command does.)
On success, 0 is returned.
On error, -1 is returned, and errno is set to indicate the error.
EPERM All of the UIDs (GIDs) of the parent process do not match
the effective UID (GID) of the calling process.
EPERM The UID of the parent's existing session keyring or the UID
of the caller's session keyring did not match the effective
UID of the caller.
EPERM The parent process is not single-threaded.
EPERM The parent process is init(1) or a kernel thread.
A wrapper is provided in the libkeyutils library:
keyctl_session_to_parent(3).
Linux.
Linux 2.6.32.
keyctl(2), keyctl_session_to_parent(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-6.10.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-02-02. 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 6.10 2024-08-21KEYCTL_SESSION_TO_PARENT(2const)
Pages that refer to this page: keyctl(2), KEYCTL_SETPERM(2const)
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HTML rendering created 2025-02-02 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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