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Top Forums UNIX for Advanced & Expert Users Insert string in binary file at top Post 302526168 by Loic Domaigne on Monday 30th of May 2011 03:43:09 PM
Old 05-30-2011
Buy faster disks, perhaps? Smilie

Seriously, I am not aware of an efficient general solution for this kind of problem... Does anybody know one? ...

How is this binary produced? Perhaps you can avoid to write the file twice using e.g. pipe or redirection and appending first the EBCDIC stream. But this assumes that you have somehow access to the program that generates this binary.

My guess is that all bet are lost if you're trying to append the string at the beginning of the file after it has been created.

Just my 2c,
Loïc
 

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SQLITE_ESCAPE_STRING(3) 												   SQLITE_ESCAPE_STRING(3)

sqlite_escape_string - Escapes a string for use as a query parameter

SYNOPSIS
string sqlite_escape_string (string $item) DESCRIPTION
sqlite_escape_string(3) will correctly quote the string specified by $item for use in an SQLite SQL statement. This includes doubling up single-quote characters ( ') and checking for binary-unsafe characters in the query string. Although the encoding makes it safe to insert the data, it will render simple text comparisons and LIKE clauses in your queries unusable for the columns that contain the binary data. In practice, this shouldn't be a problem, as your schema should be such that you don't use such things on binary columns (in fact, it might be better to store binary data using other means, such as in files). PARAMETERS
o $item - The string being quoted. If the $item contains a NUL character, or if it begins with a character whose ordinal value is 0x01, PHP will apply a binary encoding scheme so that you can safely store and retrieve binary data. RETURN VALUES
Returns an escaped string for use in an SQLite SQL statement. NOTES
Note Do not use this function to encode the return values from UDF's created using sqlite_create_function(3) or sqlite_create_aggre- gate(3) - use sqlite_udf_encode_binary(3) instead. Warning addslashes(3) should NOT be used to quote your strings for SQLite queries; it will lead to strange results when retrieving your data. SEE ALSO
sqlite_udf_encode_binary(3). PHP Documentation Group SQLITE_ESCAPE_STRING(3)
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