1Filter::sh(3) User Contributed Perl Documentation Filter::sh(3)
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6 Filter::sh - sh source filter
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9 use Filter::sh 'command' ;
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12 This filter pipes the current source file through the program which
13 corresponds to the "command" parameter using the Bourne shell.
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15 As with all source filters its scope is limited to the current source
16 file only. Every file you want to be processed by the filter must have
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19 use Filter::sh 'command' ;
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21 near the top.
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23 Here is an example script which uses the filter:
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25 use Filter::sh 'tr XYZ PQR' ;
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27 print "XYZ a = $a\n" ;
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29 And here is what it will output:
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31 PQR = 1
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34 You should be very careful when using this filter. Because of the way
35 the filter is implemented it is possible to end up with deadlock.
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37 Be especially careful when stacking multiple instances of the filter in
38 a single source file.
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41 Paul Marquess
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44 11th December 1995.
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48perl v5.32.1 2021-01-27 Filter::sh(3)