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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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KEYCTL_CHOWN(2const) KEYCTL_CHOWN(2const)
KEYCTL_CHOWN - change the ownership of a key
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_CHOWN, key_serial_t key,
uid_t uid, gid_t gid);
Change the ownership (user and group ID) of a key.
key contains the key ID. uid contains the new user ID (or -1 in
case the user ID shouldn't be changed). gid contains the new
group ID (or -1 in case the group ID shouldn't be changed).
The key must grant the caller setattr permission.
For the UID to be changed, or for the GID to be changed to a group
the caller is not a member of, the caller must have the
CAP_SYS_ADMIN capability (see capabilities(7)).
If the UID is to be changed, the new user must have sufficient
quota to accept the key. The quota deduction will be removed from
the old user to the new user should the UID be changed.
On success, 0 is returned.
On error, -1 is returned, and errno is set to indicate the error.
A wrapper is provided in the libkeyutils library: keyctl_chown(3).
Linux.
Linux 2.6.10.
keyctl(2), keyctl_chown(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⟩.
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2025-08-11. If you discover any rendering problems in this HTML
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Linux man-pages 6.15 2025-05-17 KEYCTL_CHOWN(2const)
Pages that refer to this page: keyctl(2), KEYCTL_SETPERM(2const)
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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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