c - 如何解压使用fusecompress/lzo 压缩的文件？

Question

我已经在fusecompress/安装了目录compressed/的fusecompress我将一个大文件(几GB)复制到fusecompress 目录(好吧，我对它进行了mv 处理)。目录compressed/中的压缩文件长度为1,221,396,660。但是，我无法删除/解压缩该文件。 fusioncompress 有内存错误:“无法分配内存”。

有没有办法利用lzo库为压缩文件编写解压缩例程？

我尝试了以下操作，但出现了段错误:

    char buffer[OUT_LEN];
    char outbuffer[IN_LEN];
    int read;
    lzo_uint writ;
    unsigned long totalWrit = 0;

    while( (read = fread( buffer, sizeof(char), OUT_LEN, stdin )) > 0 )
    {
            r = lzo1x_decompress( buffer, read, outbuffer, &writ, NULL );
            fwrite( outbuffer, sizeof(char), writ, stdout );
            totalWrit += writ;
    }

    fprintf( stderr, "\nDone. %d bytes written out.\n\n", totalWrit );

更新:

响应账单，文件的前 160 个字节是:

00000000  01 1f 01 5d ff 89 04 00  a2 20 85 04 30 6e ba 48  |...]..... ..0n.H|00000010  00 00 01 02 00 00 00 00  00 00 11 3c 3c 3c 20 53  |...........<<< S|00000020  75 6e 20 56 69 72 74 75  61 6c 42 6f 78 20 44 69  |un VirtualBox Di|00000030  73 6b 20 49 6d 61 67 65  20 3e 3e 3e 0a 00 3b 00  |sk Image >>>..;.|00000040  00 08 7f 10 da be 01 00  01 00 90 01 00 54 00 3b  |.............T.;|00000050  a8 00 20 c9 70 00 02 02  00 00 00 a2 2d b8 03 6c  |.. .p.......-..l|00000060  02 a9 02 80 a9 01 10 b4  01 00 15 28 00 00 52 08  |...........(..R.|00000070  00 00 a4 15 30 3e 76 22  73 4c 96 3d bf 8f ca 66  |....0>v"sL.=...f|00000080  a8 93 2b a6 83 65 44 4d  37 41 a4 02 ca bb 56 4e  |..+..eDM7A....VN|00000090  a9 e9 b0 05 39 14 00 05  04 00 00 ff 00 00 00 3f  |....9..........?|

Answer 1

您必须查看文件是如何压缩的。 Witch Header 和附加数据存储在文件中。