Last change
on this file since 1473 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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Rev | Line | |
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[821] | 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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