add: if (strlen(fname) == MAXPATHLEN-1) { fprintf(FERROR, "send_files failed on long-named directory %s\n", fname); return -1; }
context: off_t send_files(struct file_list *flist,int f_out,int f_in){   int fd;  struct sum_struct *s;  struct map_struct *buf;  struct stat st;  char fname[MAXPATHLEN];    off_t total=0;  int i;  struct file_struct *file;  int phase = 0;  if (verbose > 2)    fprintf(FERROR,"send_files starting\n");  setup_nonblocking(f_in,f_out);  while (1)     {      i = read_int(f_in);      if (i == -1) {	if (phase==0 && remote_version >= 13) {	  phase++;	  csum_length = SUM_LENGTH;	  write_int(f_out,-1);	  write_flush(f_out);	  if (verbose > 2)	    fprintf(FERROR,"send_files phase=%d\n",phase);	  continue;	}	break;      }      file = &flist->files[i];      fname[0] = 0;      if (file->dir) {	strncpy(fname,file->dir,MAXPATHLEN-1);	fname[MAXPATHLEN-1] = 0;	strcat(fname,"/");      }      strncat(fname,file->name,MAXPATHLEN-strlen(fname));      if (verbose > 2) 	fprintf(FERROR,"send_files(%d,%s)\n",i,fname);      if (dry_run) {		if (!am_server && verbose)	  printf("%s\n",fname);	write_int(f_out,i);	continue;      }      s = receive_sums(f_in);      if (!s) {	fprintf(FERROR,"receive_sums failed\n");	return -1;      }      fd = open(fname,O_RDONLY);      if (fd == -1) {	fprintf(FERROR,"send_files failed to open %s: %s\n",		fname,strerror(errno));	continue;      }        /* map the local file */      if (fstat(fd,&st) != 0) {	fprintf(FERROR,"fstat failed : %s\n",strerror(errno));	close(fd);	return -1;      }            if (st.st_size > 0) {	buf = map_file(fd,st.st_size);      } else {	buf = NULL;      }      if (verbose > 2)	fprintf(FERROR,"send_files mapped %s of size %d\n",		fname,(int)st.st_size);      write_int(f_out,i);      write_int(f_out,s->count);      write_int(f_out,s->n);      write_int(f_out,s->remainder);      if (verbose > 2)	fprintf(FERROR,"calling match_sums %s\n",fname);      if (!am_server && verbose)	printf("%s\n",fname);            match_sums(f_out,s,buf,st.st_size);      write_flush(f_out);            if (buf) unmap_file(buf);      close(fd);      free_sums(s);      if (verbose > 2)	fprintf(FERROR,"sender finished %s\n",fname);      total += st.st_size;    }  if (verbose > 2)    fprintf(FERROR,"send files finished\n");  match_report();  write_int(f_out,-1);  write_flush(f_out);  return total;}