[//000000001]: # (string::token::shell \- Text and string utilities) [//000000002]: # (Generated from file 'token\_shell\.man' by tcllib/doctools with format 'markdown') [//000000003]: # (string::token::shell\(n\) 1\.2 tcllib "Text and string utilities")
[ Main Table Of Contents | Table Of Contents | Keyword Index | Categories | Modules | Applications ]
# NAME string::token::shell \- Parsing of shell command line # Table Of Contents - [Table Of Contents](#toc) - [Synopsis](#synopsis) - [Description](#section1) - [Bugs, Ideas, Feedback](#section2) - [Keywords](#keywords) - [Category](#category) # SYNOPSIS package require Tcl 8\.5 package require string::token::shell ?1\.2? package require string::token ?1? package require fileutil [__::string token shell__ ?__\-indices__? ?__\-partial__? ?\-\-? *string*](#1) # DESCRIPTION This package provides a command which parses a line of text using basic __sh__\-syntax into a list of words\. The complete set of procedures is described below\. - __::string token shell__ ?__\-indices__? ?__\-partial__? ?\-\-? *string* This command parses the input *string* under the assumption of it following basic __sh__\-syntax\. The result of the command is a list of words in the *string*\. An error is thrown if the input does not follow the allowed syntax\. The behaviour can be modified by specifying any of the two options __\-indices__ and __\-partial__\. * __\-\-__ When specified option parsing stops at this point\. This option is needed if the input *string* may start with dash\. In other words, this is pretty much required if *string* is user input\. * __\-indices__ When specified the output is not a list of words, but a list of 4\-tuples describing the words\. Each tuple contains the type of the word, its start\- and end\-indices in the input, and the actual text of the word\. Note that the length of the word as given by the indices can differ from the length of the word found in the last element of the tuple\. The indices describe the words extent in the input, including delimiters, intra\-word quoting, etc\. whereas for the actual text of the word delimiters are stripped, intra\-word quoting decoded, etc\. The possible token types are + __PLAIN__ Plain word, not quoted\. + __D:QUOTED__ Word is delimited by double\-quotes\. + __S:QUOTED__ Word is delimited by single\-quotes\. + __D:QUOTED:PART__ + __S:QUOTED:PART__ Like the previous types, but the word has no closing quote, i\.e\. is incomplete\. These token types can occur if and only if the option __\-partial__ was specified, and only for the last word of the result\. If the option __\-partial__ was not specified such incomplete words cause the command to thrown an error instead\. * __\-partial__ When specified the parser will accept an incomplete quoted word \(i\.e\. without closing quote\) at the end of the line as valid instead of throwing an error\. The basic shell syntax accepted here are unquoted, single\- and double\-quoted words, separated by whitespace\. Leading and trailing whitespace are possible too, and stripped\. Shell variables in their various forms are *not* recognized, nor are sub\-shells\. As for the recognized forms of words, see below for the detailed specification\. * __single\-quoted word__ A single\-quoted word begins with a single\-quote character, i\.e\. __'__ \(ASCII 39\) followed by zero or more unicode characters not a single\-quote, and then closed by a single\-quote\. The word must be followed by either the end of the string, or whitespace\. A word cannot directly follow the word\. * __double\-quoted word__ A double\-quoted word begins with a double\-quote character, i\.e\. __"__ \(ASCII 34\) followed by zero or more unicode characters not a double\-quote, and then closed by a double\-quote\. Contrary to single\-quoted words a double\-quote can be embedded into the word, by prefacing, i\.e\. escaping, i\.e\. quoting it with a backslash character __\\__ \(ASCII 92\)\. Similarly a backslash character must be quoted with itself to be inserted literally\. * __unquoted word__ Unquoted words are not delimited by quotes and thus cannot contain whitespace or single\-quote characters\. Double\-quote and backslash characters can be put into unquoted words, by quting them like for double\-quoted words\. * __whitespace__ Whitespace is any unicode space character\. This is equivalent to __string is space__, or the regular expression \\\\s\. Whitespace may occur before the first word, or after the last word\. Whitespace must occur between adjacent words\. # Bugs, Ideas, Feedback This document, and the package it describes, will undoubtedly contain bugs and other problems\. Please report such in the category *textutil* of the [Tcllib Trackers](http://core\.tcl\.tk/tcllib/reportlist)\. Please also report any ideas for enhancements you may have for either package and/or documentation\. When proposing code changes, please provide *unified diffs*, i\.e the output of __diff \-u__\. Note further that *attachments* are strongly preferred over inlined patches\. Attachments can be made by going to the __Edit__ form of the ticket immediately after its creation, and then using the left\-most button in the secondary navigation bar\. # KEYWORDS [bash](\.\./\.\./\.\./\.\./index\.md\#bash), [lexing](\.\./\.\./\.\./\.\./index\.md\#lexing), [parsing](\.\./\.\./\.\./\.\./index\.md\#parsing), [shell](\.\./\.\./\.\./\.\./index\.md\#shell), [string](\.\./\.\./\.\./\.\./index\.md\#string), [tokenization](\.\./\.\./\.\./\.\./index\.md\#tokenization) # CATEGORY Text processing