FreeCalypso > hg > freecalypso-tools

annotate target-utils/libtiffs/init.c @ 921:74d284add54d

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fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents c10a65f7563e
children
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1 #include "types.h"
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2 #include "struct.h"
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3 #include "globals.h"
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4 #include "macros.h"
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5
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6 static const u8 ffs_sector_signature[6] = {'F', 'f', 's', '#', 0x10, 0x02};
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7
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8 static
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9 find_indexblk()
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10 {
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11 u32 sector_addr;
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12 u8 *sector_ptr;
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13 int i;
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15 printf("Looking for TIFFS active index block\n");
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16 sector_addr = tiffs_base_addr;
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17 for (i = 0; i < tiffs_nsectors; i++) {
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18 sector_ptr = (u8 *) sector_addr;
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19 if (!bcmp(sector_ptr, ffs_sector_signature, 6) &&
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20 sector_ptr[8] == 0xAB) {
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21 printf("Found at %08X\n", sector_addr);
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22 tiffs_active_index = (struct inode *) sector_ptr;
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23 return(0);
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24 }
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25 sector_addr += tiffs_sector_size;
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26 }
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27 printf("Error: Not found in any of the %d candidate sectors\n",
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28 tiffs_nsectors);
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29 return(-1);
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30 }
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32 static
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33 find_rootino()
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34 {
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35 int ino;
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36 struct inode *irec;
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37
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38 printf("Looking for the root inode\n");
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39 for (ino = 1; ; ino++) {
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40 if (ino >= tiffs_sector_size >> 4) {
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41 printf("Error: Hit end of sector, no root inode found\n");
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42 return(-1);
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43 }
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44 irec = tiffs_active_index + ino;
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45 if (irec->type == OBJTYPE_DIR && *inode_to_dataptr(irec) == '/')
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46 break;
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47 }
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48 printf("Found at inode #%x\n", ino);
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49 tiffs_root_ino = ino;
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50 return(0);
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51 }
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53 tiffs_init()
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54 {
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55 int stat;
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57 if (tiffs_init_done)
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58 return(0);
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59 stat = find_indexblk();
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60 if (stat < 0)
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61 return(stat);
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62 stat = find_rootino();
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63 if (stat < 0)
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64 return(stat);
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65 tiffs_init_done = 1;
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66 return(0);
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67 }