Last change
on this file since 1565 was 821, checked in by Bruno Cornec, 18 years ago |
Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
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File size:
1.3 KB
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1 | #include <stdlib.h>
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2 | #include <unistd.h>
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3 | #include "libbb.h"
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4 | #include "unarchive.h" /* for external decl of check_header_gzip */
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5 |
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6 | void check_header_gzip(int src_fd)
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7 | {
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8 | union {
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9 | unsigned char raw[8];
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10 | struct {
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11 | unsigned char method;
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12 | unsigned char flags;
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13 | unsigned int mtime;
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14 | unsigned char xtra_flags;
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15 | unsigned char os_flags;
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16 | } formated;
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17 | } header;
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18 |
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19 | bb_xread_all(src_fd, header.raw, 8);
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20 |
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21 | /* Check the compression method */
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22 | if (header.formated.method != 8) {
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23 | bb_error_msg_and_die("Unknown compression method %d",
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24 | header.formated.method);
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25 | }
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26 |
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27 | if (header.formated.flags & 0x04) {
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28 | /* bit 2 set: extra field present */
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29 | unsigned char extra_short;
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30 |
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31 | extra_short = bb_xread_char(src_fd) + (bb_xread_char(src_fd) << 8);
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32 | while (extra_short > 0) {
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33 | /* Ignore extra field */
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34 | bb_xread_char(src_fd);
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35 | extra_short--;
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36 | }
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37 | }
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38 |
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39 | /* Discard original name if any */
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40 | if (header.formated.flags & 0x08) {
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41 | /* bit 3 set: original file name present */
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42 | while(bb_xread_char(src_fd) != 0);
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43 | }
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44 |
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45 | /* Discard file comment if any */
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46 | if (header.formated.flags & 0x10) {
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47 | /* bit 4 set: file comment present */
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48 | while(bb_xread_char(src_fd) != 0);
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49 | }
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50 |
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51 | /* Read the header checksum */
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52 | if (header.formated.flags & 0x02) {
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53 | bb_xread_char(src_fd);
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54 | bb_xread_char(src_fd);
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55 | }
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56 |
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57 | return;
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58 | }
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