mirrors
/
mc
mirror of https://github.com/MidnightCommander/mc
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Ticket #1392: regression in .tar support 

Regression was introduced in lzma support
(a5ba278729)

All the heuristics stuff has been removed, only
LZMA utils 4.32.1 and later formats are supported.

Signed-off-by: Mikhail S. Pobolovets <styx.mp@gmail.com>
This commit is contained in:
Mikhail S. Pobolovets 2009-07-15 20:31:56 +03:00
parent 5894396494
commit ac2edf225e
1 changed files with 16 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/util.c
View File

@ -882,28 +882,21 @@ get_compression_type (int fd)
} }
} }
/* LZMA files; both LZMA_Alone and LZMA utils formats. The LZMA_Alone /* Support for LZMA (only utils format with magic in header).
* format is used by the LZMA_Alone tool from LZMA SDK. The LZMA utils * This is the default format of LZMA utils 4.32.1 and later. */
* format is the default format of LZMA utils 4.32.1 and later. */
if (magic[0] < 0xE1 || (magic[0] == 0xFF && magic[1] == 'L' && if (mc_read(fd, (char *) magic+4, 1) == 1)
magic[2] == 'Z' && magic[3] == 'M')) { {
if (mc_read (fd, (char *) magic + 4, 9) == 9) { /* LZMA utils format */
/* LZMA utils format */ if
if (magic[0] == 0xFF && magic[4] == 'A' && magic[5] == 0x00) ( magic[0] == 0xFF
return COMPRESSION_LZMA; && magic[1] == 'L'
/* The LZMA_Alone format has no magic bytes, thus we && magic[2] == 'Z'
* need to play a wizard. This can give false positives, && magic[3] == 'M'
* thus the detection below should be removed when && magic[4] == 'A'
* the newer LZMA utils format has got popular. */ && magic[5] == 0x00
if (magic[0] < 0xE1 && magic[4] < 0x20 && )
((magic[10] == 0x00 && magic[11] == 0x00 && return COMPRESSION_LZMA;
magic[12] == 0x00) ||
(magic[5] == 0xFF && magic[6] == 0xFF &&
magic[7] == 0xFF && magic[8] == 0xFF &&
magic[9] == 0xFF && magic[10] == 0xFF &&
magic[11] == 0xFF && magic[12] == 0xFF)))
return COMPRESSION_LZMA;
}
} }
/* XZ compression magic */ /* XZ compression magic */
@ -916,7 +909,7 @@ get_compression_type (int fd)
} }
} }
return 0; return COMPRESSION_NONE;
} }
const char * const char *