#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include "nano-X.h"int main(int argc, char *argv[]){	GR_WINDOW_ID wid;	GR_EVENT event;	FILE *fp;	char *buf = NULL;	int buf_size = 0;	int data_len = 0;	int ret = 0;	GR_EVENT_CLIENT_DATA_REQ *req;	GR_EVENT_SELECTION_CHANGED *sc;	if(argc != 2) {		fprintf(stderr, "Usage: setselection <text file>\n");		return 1;	}	if(!(fp = fopen(argv[1], "r"))) {		fprintf(stderr, "Couldn't open text file\n");		return 2;	}	do {		data_len += ret;		buf_size = data_len + 65536;		if(!(buf = realloc(buf, buf_size))) {			fprintf(stderr, "Out of memory\n");			return 3;		}	} while((ret = fread(buf + data_len, 1, 65536, fp)) > 0);	if(ret < 0) {		fprintf(stderr, "Failed to read text file sucessfully\n");		return 2;	}	if(GrOpen() < 0) {		fprintf(stderr, "Couldn't connect to Nano-X server\n");		return 4;	}	wid = GrNewWindow(GR_ROOT_WINDOW_ID, 0, 0, 1, 1, 0, 0, 0);	if(!wid) {		fprintf(stderr, "Couldn't get a window\n");		return 5;	}	GrSelectEvents(wid, GR_EVENT_MASK_CLIENT_DATA_REQ |				GR_EVENT_MASK_SELECTION_CHANGED);	GrSetSelectionOwner(wid, "nota/realtype text/plain non/existant "				"something/else");	while(1) {		GrGetNextEvent(&event);		switch(event.type) {			case GR_EVENT_TYPE_CLIENT_DATA_REQ:				req = &event.clientdatareq;				fprintf(stderr, "Got request with serial "					"number %ld from window %d for mime "					"type %d\n", req->serial, req->rid,							req->mimetype);				GrSendClientData(wid, req->rid, req->serial,						data_len, data_len, buf);				break;			case GR_EVENT_TYPE_SELECTION_CHANGED:				sc = &event.selectionchanged;				if(sc->new_owner != wid) {					fprintf(stderr, "Lost selection to "						"window %d\n", sc->new_owner);					return 0;				}			default:				break;		}	}	return 0;}