keyctl_chown (3) - Linux Manuals
keyctl_chown: Change the ownership of a key
keyctl_chown - Change the ownership of a key
#include <keyutils.h> long keyctl_chown(key_serial_t key, uid_t uid, gid_t gid);
DESCRIPTIONkeyctl_chown() changes the user and group ownership details of a key.
A setting of -1 on either uid or gid will cause that setting to be ignored.
A process that does not have the SysAdmin capability may not change a key's UID or set the key's GID to a value that does not match the process's GID or one of its group list.
RETURN VALUEOn success keyctl_chown() returns 0 . On error, the value -1 will be returned and errno will have been set to an appropriate error.
- The specified key does not exist.
- The specified key has expired.
- The specified key has been revoked.
- Changing the UID to the one specified would run that UID out of quota.
- The key exists, but does not grant setattr permission to the calling process.