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unzip: give better error message when presented with unsupported
zip file. Add zip documentation and an example of file we cant (yet) unpack.
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@ -99,6 +99,12 @@ static void unzip_create_leading_dirs(const char *fn)
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static void unzip_extract(zip_header_t *zip_header, int src_fd, int dst_fd)
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{
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if (zip_header->formatted.flags & (0x0008|0x0001)) {
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/* 0x0001 - encrypted */
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/* 0x0008 - streaming. [u]cmpsize can be reliably gotten
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* only from Central Directory. See unzip_doc.txt */
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bb_error_msg_and_die("zip flags 8 and 1 are not supported");
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}
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if (zip_header->formatted.method == 0) {
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/* Method 0 - stored (not compressed) */
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off_t size = zip_header->formatted.ucmpsize;
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BIN
archival/unzip_cant_handle.odt
Normal file
BIN
archival/unzip_cant_handle.odt
Normal file
Binary file not shown.
BIN
archival/unzip_doc.txt.bz2
Normal file
BIN
archival/unzip_doc.txt.bz2
Normal file
Binary file not shown.
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