1 /* $NetBSD: fileread_ustarfs.c,v 1.2 2006/08/26 14:13:40 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifdef _STANDALONE 40 #include <lib/libsa/stand.h> 41 #include <lib/libkern/libkern.h> 42 #endif 43 44 #include <sys/types.h> 45 #include <sys/param.h> 46 #include "bootxx.h" 47 48 #include <machine/sector.h> 49 #include <machine/sbd.h> 50 51 int ustar_size(const char *); 52 53 int 54 fileread(const char *fname, size_t *size) 55 { 56 uint8_t *p = (void *)SDBOOT_PDINFOADDR; 57 58 if (dk_read(16, 1, p) != 0) 59 return BERR_TARHDR; 60 61 if (((*(uint32_t *)(p + 256)) & 0xffffff) != 0x757374) 62 return BERR_TARMAGIC; 63 64 *size = ustar_size((const char *)(p + 124)); 65 if (dk_read(17, ROUND_SECTOR(*size) >> DEV_BSHIFT, 66 (void *)SDBOOT_SCRATCHADDR) != 0) 67 return BERR_RDFILE; 68 69 return 0; 70 } 71 72 int 73 ustar_size(const char *p) 74 { 75 int i, j, k; 76 77 for (i = 0, j = 0, k = 1, p += 10; i < 11; i++, p--, k *= 8) 78 j += (*p - '0') * k; 79 80 return j; 81 } 82