1Mtunefs tunefs.c /^main(argc, argv)$/ 2bread tunefs.c /^bread(bno, buf, cnt)$/ 3bwrite tunefs.c /^bwrite(blk, buf, size)$/ 4fatal tunefs.c /^fatal(fmt, arg1, arg2)$/ 5getsb tunefs.c /^getsb(fs, file)$/ 6