NAME

       KEYCTL_CHOWN - change the ownership of a key

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #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);

DESCRIPTION

       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.

RETURN VALUE

       On success, 0 is returned.

       On error, -1 is returned, and errno is set to indicate the error.

VERSIONS

       A wrapper is provided in the libkeyutils library: keyctl_chown(3).

STANDARDS

       Linux.

HISTORY

       Linux 2.6.10.

SEE ALSO

       keyctl(2), keyctl_chown(3)

Linux man-pages 6.16                               2025-05-17                               KEYCTL_CHOWN(2const)