gawk: Command Line

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1 2.1 Invoking 'awk'
1 ==================
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1 There are two ways to run 'awk'--with an explicit program or with one or
1 more program files.  Here are templates for both of them; items enclosed
1 in [...] in these templates are optional:
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1      'awk' [OPTIONS] '-f' PROGFILE ['--'] FILE ...
1      'awk' [OPTIONS] ['--'] ''PROGRAM'' FILE ...
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1    In addition to traditional one-letter POSIX-style options, 'gawk'
1 also supports GNU long options.
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1    It is possible to invoke 'awk' with an empty program:
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1      awk '' datafile1 datafile2
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1 Doing so makes little sense, though; 'awk' exits silently when given an
1 empty program.  (d.c.)  If '--lint' has been specified on the command
1 line, 'gawk' issues a warning that the program is empty.
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