bsd/vfs/vfs_subr.c

1540 	 * if you are the owner of drain/termination, can acquire usecount
4310 		 * if you are the owner of drain/suspend/termination , can acquire iocount
4311 		 * check for VL_TERMINATE; it does not set owner
5799 	/* default assumption is not-owner */
5808 	/* we could test the owner UUID here if we had a policy for it */
5819  *				vap->va_gid	group owner of vnode object
6048 	/* owner permissions */
6098 	/* Not owner; if group and world both grant it we're done */
6110 	ismember = 0;	/* Default to allow, if the target has no group owner */
6136 	/* Not owner, not in group, use world result */
6173  * not owner of the node or directory.
6329 	 * If we are the file owner, we automatically have some rights.
6340 	 * granted to the owner.  We need to do this because at this point
6342 	 * the owner.
6411 	 * We grant WRITE_ATTRIBUTES to the owner if it hasn't been denied.
7079 	 * If the filesystem is mounted IGNORE_OWNERSHIP and an explicit owner is set, that
7080 	 * owner takes ownership of all new files.
7087 			/* default owner is current user */
7218 		/* initialising owner/group UUID */
7226 				KAUTH_DEBUG("  ERROR - cannot create item with supplied owner UUID - not us");
7276 	uid_t		owner;
7406 		 * The owner and root may set any timestamps they like,
7407 		 * provided that the file is not immutable.  The owner still needs
7411 			KAUTH_DEBUG("ATTR - root or owner changing timestamps");
7416 				KAUTH_DEBUG("ATTR - non-root/owner changing timestamps, requiring WRITE_ATTRIBUTES");
7477 		 * Can't set the setuid bit unless you're root or the file's owner.
7483 					owner = vap->va_uid;
7485 					owner = ova.va_uid;
7491 				if (owner != kauth_cred_getuid(cred)) {
7614 		/* if the owner UUID is not actually changing ... */
7620 			 * If the current owner UUID is a null GUID, check
7621 			 * it against the UUID corresponding to the owner UID.
7634 		 * The owner UUID cannot be set by a non-superuser to anything other than
7635 		 * their own or a null GUID (to "unset" the owner UUID).
7648 				KAUTH_DEBUG("  ERROR - cannot set supplied owner UUID - not us / null");
7710 			KAUTH_DEBUG("ATTR - superuser changing file owner/group, requiring immutability check");
7728 				KAUTH_DEBUG("CHOWN - trying to change owner but cannot get mode from filesystem to mask setugid bits");
7994 	 * because we are the owner of the file.