591 lines
15 KiB
C
591 lines
15 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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* Nick Bane modifications flagged NCB
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* Endian handling patches by James Ng
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* makeyaffsimage.c
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*
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* Makes a YAFFS file system image that can be used to load up a file system.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <string.h>
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#include <unistd.h>
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#include "yaffs_ecc.h"
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#include "yaffs_guts.h"
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#define MAX_OBJECTS 10000
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const char * mkyaffsimage_c_version = "$Id: mkyaffsimage.c,v 1.7 2003/07/16 03:00:48 charles Exp $";
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typedef struct
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{
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dev_t dev;
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ino_t ino;
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int obj;
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} objItem;
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static objItem obj_list[MAX_OBJECTS];
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static int n_obj = 0;
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static int obj_id = YAFFS_NOBJECT_BUCKETS + 1;
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static int nObjects, nDirectories, nPages;
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static int outFile;
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static int error;
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static int convert_endian = 0;
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static int obj_compare(const void *a, const void * b)
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{
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objItem *oa, *ob;
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oa = (objItem *)a;
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ob = (objItem *)b;
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if(oa->dev < ob->dev) return -1;
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if(oa->dev > ob->dev) return 1;
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if(oa->ino < ob->ino) return -1;
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if(oa->ino > ob->ino) return 1;
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return 0;
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}
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static void add_obj_to_list(dev_t dev, ino_t ino, int obj)
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{
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if(n_obj < MAX_OBJECTS)
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{
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obj_list[n_obj].dev = dev;
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obj_list[n_obj].ino = ino;
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obj_list[n_obj].obj = obj;
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n_obj++;
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qsort(obj_list,n_obj,sizeof(objItem),obj_compare);
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}
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else
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{
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// oops! not enough space in the object array
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fprintf(stderr,"Not enough space in object array\n");
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exit(2);
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}
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}
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static int find_obj_in_list(dev_t dev, ino_t ino)
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{
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objItem *i = NULL;
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objItem test;
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test.dev = dev;
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test.ino = ino;
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if(n_obj > 0)
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{
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i = bsearch(&test,obj_list,n_obj,sizeof(objItem),obj_compare);
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}
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if(i)
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{
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return i->obj;
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}
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return -1;
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}
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// NCB added 10/9/2002
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static __u16 yaffs_CalcNameSum(const char *name)
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{
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__u16 sum = 0;
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__u16 i = 1;
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__u8 *bname = (__u8 *)name;
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while (*bname)
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{
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sum += (*bname) * i;
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i++;
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bname++;
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}
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return sum;
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}
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static void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
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{
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yaffs_ECCCalculate(data , spare->ecc1);
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yaffs_ECCCalculate(&data[256] , spare->ecc2);
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}
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static void yaffs_CalcTagsECC(yaffs_Tags *tags)
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{
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// Todo don't do anything yet. Need to calculate ecc
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unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
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unsigned i,j;
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unsigned ecc = 0;
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unsigned bit = 0;
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// Clear ECC fields
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if (!convert_endian)
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{
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tags->ecc = 0;
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}
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else
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{
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// Because we're in "munged tag" mode, we have to clear it manually
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b[6] &= 0xC0;
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b[7] &= 0x03;
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}
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for(i = 0; i < 8; i++)
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{
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// NCB modified 20-9-02 for(j = 1; j &0x7f; j<<=1)
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for(j = 1; j &0xff; j<<=1)
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{
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bit++;
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if(b[i] & j)
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{
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ecc ^= bit;
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}
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}
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}
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// Write out ECC
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if (!convert_endian)
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{
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tags->ecc = ecc;
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}
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else
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{
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// We have to munge the ECC again.
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b[6] |= ((ecc >> 6) & 0x3F);
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b[7] |= ((ecc & 0x3F) << 2);
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}
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}
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static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
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{
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yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
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//yaffs_CalcTagsECC(tagsPtr);
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sparePtr->tagByte0 = tu->asBytes[0];
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sparePtr->tagByte1 = tu->asBytes[1];
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sparePtr->tagByte2 = tu->asBytes[2];
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sparePtr->tagByte3 = tu->asBytes[3];
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sparePtr->tagByte4 = tu->asBytes[4];
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sparePtr->tagByte5 = tu->asBytes[5];
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sparePtr->tagByte6 = tu->asBytes[6];
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sparePtr->tagByte7 = tu->asBytes[7];
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}
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/* This little function converts a little endian tag to a big endian tag.
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* NOTE: The tag is not usable after this other than calculating the CRC
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* with.
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*/
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static void little_to_big_endian(yaffs_Tags *tagsPtr)
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{
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yaffs_TagsUnion * tags = (yaffs_TagsUnion* )tagsPtr; // Work in bytes.
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yaffs_TagsUnion temp;
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memset(&temp, 0, sizeof(temp));
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// Ick, I hate magic numbers.
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temp.asBytes[0] = ((tags->asBytes[2] & 0x0F) << 4) | ((tags->asBytes[1] & 0xF0) >> 4);
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temp.asBytes[1] = ((tags->asBytes[1] & 0x0F) << 4) | ((tags->asBytes[0] & 0xF0) >> 4);
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temp.asBytes[2] = ((tags->asBytes[0] & 0x0F) << 4) | ((tags->asBytes[2] & 0x30) >> 2) | ((tags->asBytes[3] & 0xC0) >> 6);
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temp.asBytes[3] = ((tags->asBytes[3] & 0x3F) << 2) | ((tags->asBytes[2] & 0xC0) >> 6);
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temp.asBytes[4] = ((tags->asBytes[6] & 0x03) << 6) | ((tags->asBytes[5] & 0xFC) >> 2);
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temp.asBytes[5] = ((tags->asBytes[5] & 0x03) << 6) | ((tags->asBytes[4] & 0xFC) >> 2);
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temp.asBytes[6] = ((tags->asBytes[4] & 0x03) << 6) | (tags->asBytes[7] & 0x3F);
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temp.asBytes[7] = (tags->asBytes[6] & 0xFC) | ((tags->asBytes[7] & 0xC0) >> 6);
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// Now copy it back.
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tags->asBytes[0] = temp.asBytes[0];
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tags->asBytes[1] = temp.asBytes[1];
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tags->asBytes[2] = temp.asBytes[2];
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tags->asBytes[3] = temp.asBytes[3];
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tags->asBytes[4] = temp.asBytes[4];
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tags->asBytes[5] = temp.asBytes[5];
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tags->asBytes[6] = temp.asBytes[6];
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tags->asBytes[7] = temp.asBytes[7];
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}
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static int write_chunk(__u8 *data, __u32 objId, __u32 chunkId, __u32 nBytes)
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{
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yaffs_Tags t;
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yaffs_Spare s;
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error = write(outFile,data,512);
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if(error < 0) return error;
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memset(&t,0xff,sizeof (yaffs_Tags));
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memset(&s,0xff,sizeof (yaffs_Spare));
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t.chunkId = chunkId;
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t.serialNumber = 0;
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t.byteCount = nBytes;
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t.objectId = objId;
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if (convert_endian)
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{
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little_to_big_endian(&t);
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}
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yaffs_CalcTagsECC(&t);
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yaffs_LoadTagsIntoSpare(&s,&t);
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yaffs_CalcECC(data,&s);
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nPages++;
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return write(outFile,&s,sizeof(yaffs_Spare));
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}
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#define SWAP32(x) ((((x) & 0x000000FF) << 24) | \
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(((x) & 0x0000FF00) << 8 ) | \
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(((x) & 0x00FF0000) >> 8 ) | \
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(((x) & 0xFF000000) >> 24))
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#define SWAP16(x) ((((x) & 0x00FF) << 8) | \
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(((x) & 0xFF00) >> 8))
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// This one is easier, since the types are more standard. No funky shifts here.
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static void object_header_little_to_big_endian(yaffs_ObjectHeader* oh)
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{
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oh->type = SWAP32(oh->type); // GCC makes enums 32 bits.
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oh->parentObjectId = SWAP32(oh->parentObjectId); // int
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oh->sum__NoLongerUsed = SWAP16(oh->sum__NoLongerUsed); // __u16 - Not used, but done for completeness.
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// name = skip. Char array. Not swapped.
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oh->yst_mode = SWAP32(oh->yst_mode);
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#ifdef CONFIG_YAFFS_WINCE // WinCE doesn't implement this, but we need to just in case.
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// In fact, WinCE would be *THE* place where this would be an issue!
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oh->notForWinCE[0] = SWAP32(oh->notForWinCE[0]);
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oh->notForWinCE[1] = SWAP32(oh->notForWinCE[1]);
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oh->notForWinCE[2] = SWAP32(oh->notForWinCE[2]);
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oh->notForWinCE[3] = SWAP32(oh->notForWinCE[3]);
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oh->notForWinCE[4] = SWAP32(oh->notForWinCE[4]);
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#else
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// Regular POSIX.
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oh->yst_uid = SWAP32(oh->yst_uid);
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oh->yst_gid = SWAP32(oh->yst_gid);
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oh->yst_atime = SWAP32(oh->yst_atime);
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oh->yst_mtime = SWAP32(oh->yst_mtime);
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oh->yst_ctime = SWAP32(oh->yst_ctime);
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#endif
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oh->fileSize = SWAP32(oh->fileSize); // Aiee. An int... signed, at that!
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oh->equivalentObjectId = SWAP32(oh->equivalentObjectId);
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// alias - char array.
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oh->yst_rdev = SWAP32(oh->yst_rdev);
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#ifdef CONFIG_YAFFS_WINCE
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oh->win_ctime[0] = SWAP32(oh->win_ctime[0]);
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oh->win_ctime[1] = SWAP32(oh->win_ctime[1]);
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oh->win_atime[0] = SWAP32(oh->win_atime[0]);
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oh->win_atime[1] = SWAP32(oh->win_atime[1]);
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oh->win_mtime[0] = SWAP32(oh->win_mtime[0]);
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oh->win_mtime[1] = SWAP32(oh->win_mtime[1]);
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oh->roomToGrow[0] = SWAP32(oh->roomToGrow[0]);
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oh->roomToGrow[1] = SWAP32(oh->roomToGrow[1]);
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oh->roomToGrow[2] = SWAP32(oh->roomToGrow[2]);
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oh->roomToGrow[3] = SWAP32(oh->roomToGrow[3]);
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oh->roomToGrow[4] = SWAP32(oh->roomToGrow[4]);
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oh->roomToGrow[5] = SWAP32(oh->roomToGrow[5]);
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#else
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oh->roomToGrow[0] = SWAP32(oh->roomToGrow[0]);
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oh->roomToGrow[1] = SWAP32(oh->roomToGrow[1]);
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oh->roomToGrow[2] = SWAP32(oh->roomToGrow[2]);
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oh->roomToGrow[3] = SWAP32(oh->roomToGrow[3]);
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oh->roomToGrow[4] = SWAP32(oh->roomToGrow[4]);
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oh->roomToGrow[5] = SWAP32(oh->roomToGrow[5]);
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oh->roomToGrow[6] = SWAP32(oh->roomToGrow[6]);
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oh->roomToGrow[7] = SWAP32(oh->roomToGrow[7]);
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oh->roomToGrow[8] = SWAP32(oh->roomToGrow[8]);
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oh->roomToGrow[9] = SWAP32(oh->roomToGrow[9]);
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oh->roomToGrow[10] = SWAP32(oh->roomToGrow[10]);
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oh->roomToGrow[11] = SWAP32(oh->roomToGrow[11]);
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#endif
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}
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static int write_object_header(int objId, yaffs_ObjectType t, struct stat *s, int parent, const char *name, int equivalentObj, const char * alias)
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{
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__u8 bytes[512];
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yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)bytes;
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memset(bytes,0xff,512);
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oh->type = t;
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oh->parentObjectId = parent;
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strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
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if(t != YAFFS_OBJECT_TYPE_HARDLINK)
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{
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oh->yst_mode = s->st_mode;
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oh->yst_uid = s->st_uid;
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// NCB 12/9/02 oh->yst_gid = s->yst_uid;
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oh->yst_gid = s->st_gid;
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oh->yst_atime = s->st_atime;
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oh->yst_mtime = s->st_mtime;
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oh->yst_ctime = s->st_ctime;
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oh->yst_rdev = s->st_rdev;
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}
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if(t == YAFFS_OBJECT_TYPE_FILE)
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{
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oh->fileSize = s->st_size;
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}
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if(t == YAFFS_OBJECT_TYPE_HARDLINK)
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{
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oh->equivalentObjectId = equivalentObj;
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}
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if(t == YAFFS_OBJECT_TYPE_SYMLINK)
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{
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strncpy(oh->alias,alias,YAFFS_MAX_ALIAS_LENGTH);
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}
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if (convert_endian)
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{
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object_header_little_to_big_endian(oh);
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}
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return write_chunk(bytes,objId,0,0xffff);
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}
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static int process_directory(int parent, const char *path)
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{
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DIR *dir;
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struct dirent *entry;
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nDirectories++;
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dir = opendir(path);
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if(dir)
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{
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while((entry = readdir(dir)) != NULL)
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{
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/* Ignore . and .. */
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if(strcmp(entry->d_name,".") &&
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strcmp(entry->d_name,".."))
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{
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char full_name[500];
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struct stat stats;
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int equivalentObj;
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int newObj;
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sprintf(full_name,"%s/%s",path,entry->d_name);
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lstat(full_name,&stats);
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if(S_ISLNK(stats.st_mode) ||
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S_ISREG(stats.st_mode) ||
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S_ISDIR(stats.st_mode) ||
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S_ISFIFO(stats.st_mode) ||
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S_ISBLK(stats.st_mode) ||
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S_ISCHR(stats.st_mode) ||
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S_ISSOCK(stats.st_mode))
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{
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newObj = obj_id++;
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nObjects++;
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printf("Object %d, %s is a ",newObj,full_name);
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/* We're going to create an object for it */
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if((equivalentObj = find_obj_in_list(stats.st_dev, stats.st_ino)) > 0)
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{
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/* we need to make a hard link */
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printf("hard link to object %d\n",equivalentObj);
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error = write_object_header(newObj, YAFFS_OBJECT_TYPE_HARDLINK, &stats, parent, entry->d_name, equivalentObj, NULL);
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}
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else
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{
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add_obj_to_list(stats.st_dev,stats.st_ino,newObj);
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if(S_ISLNK(stats.st_mode))
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{
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char symname[500];
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memset(symname,0, sizeof(symname));
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readlink(full_name,symname,sizeof(symname) -1);
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printf("symlink to \"%s\"\n",symname);
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error = write_object_header(newObj, YAFFS_OBJECT_TYPE_SYMLINK, &stats, parent, entry->d_name, -1, symname);
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}
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else if(S_ISREG(stats.st_mode))
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{
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printf("file, ");
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error = write_object_header(newObj, YAFFS_OBJECT_TYPE_FILE, &stats, parent, entry->d_name, -1, NULL);
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if(error >= 0)
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{
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int h;
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__u8 bytes[512];
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int nBytes;
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int chunk = 0;
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h = open(full_name,O_RDONLY);
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if(h >= 0)
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{
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memset(bytes,0xff,512);
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while((nBytes = read(h,bytes,512)) > 0)
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{
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chunk++;
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write_chunk(bytes,newObj,chunk,nBytes);
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memset(bytes,0xff,512);
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}
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if(nBytes < 0)
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error = nBytes;
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printf("%d data chunks written\n",chunk);
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}
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else
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{
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perror("Error opening file");
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}
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close(h);
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}
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}
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else if(S_ISSOCK(stats.st_mode))
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{
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printf("socket\n");
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error = write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
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}
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else if(S_ISFIFO(stats.st_mode))
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{
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printf("fifo\n");
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error = write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
|
|
}
|
|
else if(S_ISCHR(stats.st_mode))
|
|
{
|
|
printf("character device\n");
|
|
error = write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
|
|
}
|
|
else if(S_ISBLK(stats.st_mode))
|
|
{
|
|
printf("block device\n");
|
|
error = write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
|
|
}
|
|
else if(S_ISDIR(stats.st_mode))
|
|
{
|
|
printf("directory\n");
|
|
error = write_object_header(newObj, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, parent, entry->d_name, -1, NULL);
|
|
// NCB modified 10/9/2001 process_directory(1,full_name);
|
|
process_directory(newObj,full_name);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
printf(" we don't handle this type\n");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct stat stats;
|
|
|
|
printf("mkyaffsimage: image building tool for YAFFS built "__DATE__"\n");
|
|
|
|
if(argc < 3)
|
|
{
|
|
printf("usage: mkyaffsimage dir image_file [convert]\n");
|
|
printf(" dir the directory tree to be converted\n");
|
|
printf(" image_file the output file to hold the image\n");
|
|
printf(" 'convert' produce a big-endian image from a little-endian machine\n");
|
|
exit(1);
|
|
}
|
|
|
|
if ((argc == 4) && (!strncmp(argv[3], "convert", strlen("convert"))))
|
|
{
|
|
convert_endian = 1;
|
|
}
|
|
|
|
if(stat(argv[1],&stats) < 0)
|
|
{
|
|
printf("Could not stat %s\n",argv[1]);
|
|
exit(1);
|
|
}
|
|
|
|
if(!S_ISDIR(stats.st_mode))
|
|
{
|
|
printf(" %s is not a directory\n",argv[1]);
|
|
exit(1);
|
|
}
|
|
|
|
outFile = open(argv[2],O_CREAT | O_TRUNC | O_WRONLY, S_IREAD | S_IWRITE);
|
|
|
|
|
|
if(outFile < 0)
|
|
{
|
|
printf("Could not open output file %s\n",argv[2]);
|
|
exit(1);
|
|
}
|
|
|
|
printf("Processing directory %s into image file %s\n",argv[1],argv[2]);
|
|
error = write_object_header(1, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, 1,"", -1, NULL);
|
|
if(error)
|
|
error = process_directory(YAFFS_OBJECTID_ROOT,argv[1]);
|
|
|
|
close(outFile);
|
|
|
|
if(error < 0)
|
|
{
|
|
perror("operation incomplete");
|
|
exit(1);
|
|
}
|
|
else
|
|
{
|
|
printf("Operation complete.\n"
|
|
"%d objects in %d directories\n"
|
|
"%d NAND pages\n",nObjects, nDirectories, nPages);
|
|
}
|
|
|
|
close(outFile);
|
|
|
|
exit(0);
|
|
}
|
|
|