almost similar to this
 
	 
 
#include "common/hercules.h"
#include "map/pc.h"
#include "map/atcommand.h"
#include "common/timer.h"
#include "common/memmgr.h"
#include "common/HPMDataCheck.h"
HPExport struct hplugin_info pinfo = {
	"die_delay",
	SERVER_TYPE_MAP,
	"x_O",
	HPM_VERSION,
};
ACMD(kill) {
	if ( DIFF_TICK( timer->gettick(), sd->canlog_tick ) < battle->bc->prevent_logout ) {
		char msg[CHAT_SIZE_MAX];
		safesnprintf( msg, CHAT_SIZE_MAX, "There is a %d seconds delay of using this command to kill the character again", battle->bc->prevent_logout /1000 );
		clif->message( fd, msg );
		return false;
	}
	status_kill( &sd->bl );
	clif->message( sd->fd, msg_fd( fd, 13 )); // A pity! You've died.
	if ( fd != sd->fd )
		clif->message( fd, msg_fd( fd, 14 )); // Character killed.
	return true;
}
HPExport void plugin_init (void) {
	addAtcommand( "kill", kill );
}
	this assume your prevent_logout in your battle_config has default setting
 
// Prevent logout of players after being hit for how long (in ms, 0 disables)?
prevent_logout: 10000
// When should the server prevent a player from logging out? Have no effect if prevent_logout is disabled. (Note 3)
// Official servers prevent players from logging out after attacking, casting skills, and taking damage.
// 0 = Players can always logout
// 1 = Prevent logout on login
// 2 = Prevent logout after attacking
// 4 = Prevent logout after casting skill
// 8 = Prevent logout after being hit
prevent_logout_trigger: 14
	prevent_logout_trigger have to at least has 2+8