FreeCalypso > hg > freecalypso-tools

annotate target-utils/libtiffs/rdinmem.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 9214118ae941
children
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1 #include <sys/types.h>
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2 #include "types.h"
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3 #include "struct.h"
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4 #include "globals.h"
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5 #include "macros.h"
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7 tiffs_read_into_ram(pathname, buf, maxlen, lenrtn)
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8 char *pathname;
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9 u8 *buf;
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10 size_t maxlen, *lenrtn;
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11 {
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12 int stat, cont;
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13 u8 *chunk_start;
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14 size_t chunk_size, real_len, roomleft;
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16 stat = tiffs_find_file(pathname, &chunk_start, &chunk_size, &cont);
0
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17 if (stat < 0)
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18 return(stat);
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19 if (chunk_size > maxlen) {
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20 toobig: printf("Error: %s is bigger than the read buffer\n", pathname);
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21 return(-1);
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22 }
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23 real_len = chunk_size;
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24 memcpy(buf, chunk_start, chunk_size);
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25 buf += chunk_size;
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26 roomleft = maxlen - chunk_size;
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27 while (cont) {
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28 stat = tiffs_get_segment(cont, &chunk_start, &chunk_size,
0
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29 &cont);
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30 if (stat < 0)
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31 return(stat);
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32 if (chunk_size > roomleft)
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33 goto toobig;
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34 real_len += chunk_size;
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35 memcpy(buf, chunk_start, chunk_size);
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36 buf += chunk_size;
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37 roomleft -= chunk_size;
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38 }
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39 if (lenrtn)
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40 *lenrtn = real_len;
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41 return(0);
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42 }