70     char *trackbuf = NULL, *vrfybuf = NULL;  in main()  local
134 	if(!trackbuf) {  in main()
135 	    trackbuf = malloc(bpt);  in main()
136 	    if(!trackbuf) errx(1, "malloc");  in main()
150 	    memset(trackbuf,0,bpt);  in main()
152 		if(!(i = read(inputfd,trackbuf+j,bpt-j))) {  in main()
169 	    if (write (fd, trackbuf, bpt) != bpt) err(1, "write");  in main()
176 	    if (memcmp(trackbuf,vrfybuf,bpt)) err(1, "compare");  in main()
179 	    memset(trackbuf,0,bpt);  in main()
181 		if(!(i = read(inputfd,trackbuf+j,bpt-j))) {  in main()
195     free(trackbuf);  in main()