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tar: fix a bug where autodetection messes up -z on extract

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2011-02-06 20:01:11 +01:00
parent ca18e25525
commit aef441cb4d
4 changed files with 30 additions and 14 deletions
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20
include/archive.h
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@ -8,22 +8,22 @@ enum {
#if BB_BIG_ENDIAN
COMPRESS_MAGIC = 0x1f9d,
GZIP_MAGIC = 0x1f8b,
BZIP2_MAGIC = 'B' * 256 + 'Z',
BZIP2_MAGIC = 256 * 'B' + 'Z',
/* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */
/* More info at: http://tukaani.org/xz/xz-file-format.txt */
XZ_MAGIC1 = 0xfd * 256 + '7',
XZ_MAGIC2 = (('z' * 256 + 'X') * 256 + 'Z') * 256 + 0,
XZ_MAGIC1 = 256 * 0xfd + '7',
XZ_MAGIC2 = 256 * (256 * (256 * 'z' + 'X') + 'Z') + 0,
/* Different form: 32 bits, then 16 bits: */
XZ_MAGIC1a = ((0xfd * 256 + '7') * 256 + 'z') * 256 + 'X',
XZ_MAGIC2a = 'Z' * 256 + 0,
XZ_MAGIC1a = 256 * (256 * (256 * 0xfd + '7') + 'z') + 'X',
XZ_MAGIC2a = 256 * 'Z' + 0,
#else
COMPRESS_MAGIC = 0x9d1f,
GZIP_MAGIC = 0x8b1f,
BZIP2_MAGIC = 'Z' * 256 + 'B',
XZ_MAGIC1 = '7' * 256 + 0xfd,
XZ_MAGIC2 = ((0 * 256 + 'Z') * 256 + 'X') * 256 + 'z',
XZ_MAGIC1a = (('X' * 256 + 'z') * 256 + '7') * 256 + 0xfd,
XZ_MAGIC2a = 0 * 256 + 'Z',
BZIP2_MAGIC = 'B' + 'Z' * 256,
XZ_MAGIC1 = 0xfd + '7' * 256,
XZ_MAGIC2 = 'z' + ('X' + ('Z' + 0 * 256) * 256) * 256,
XZ_MAGIC1a = 0xfd + ('7' + ('z' + 'X' * 256) * 256) * 256,
XZ_MAGIC2a = 'Z' + 0 * 256,
#endif
};