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48 lines
1.8 KiB
ReStructuredText
48 lines
1.8 KiB
ReStructuredText
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string-escape - escape special characters
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=========================================
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Synopsis
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--------
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.. BEGIN SYNOPSIS
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::
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string escape [(-n | --no-quoted)] [--style=xxx] [STRING...]
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string unescape [--style=xxx] [STRING...]
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.. END SYNOPSIS
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Description
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-----------
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.. BEGIN DESCRIPTION
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``string escape`` escapes each STRING in one of three ways. The first is ``--style=script``. This is the default. It alters the string such that it can be passed back to ``eval`` to produce the original argument again. By default, all special characters are escaped, and quotes are used to simplify the output when possible. If ``-n`` or ``--no-quoted`` is given, the simplifying quoted format is not used. Exit status: 0 if at least one string was escaped, or 1 otherwise.
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``--style=var`` ensures the string can be used as a variable name by hex encoding any non-alphanumeric characters. The string is first converted to UTF-8 before being encoded.
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``--style=url`` ensures the string can be used as a URL by hex encoding any character which is not legal in a URL. The string is first converted to UTF-8 before being encoded.
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``--style=regex`` escapes an input string for literal matching within a regex expression. The string is first converted to UTF-8 before being encoded.
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``string unescape`` performs the inverse of the ``string escape`` command. If the string to be unescaped is not properly formatted it is ignored. For example, doing ``string unescape --style=var (string escape --style=var $str)`` will return the original string. There is no support for unescaping ``--style=regex``.
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.. END DESCRIPTION
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Examples
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--------
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.. BEGIN EXAMPLES
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::
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>_ echo \\x07 | string escape
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cg
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>_ string escape --style=var 'a1 b2'\\u6161
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a1_20b2__c_E6_85_A1
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.. END EXAMPLES
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