Shell Script Table Post: 302879116

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Top Forums Shell Programming and Scripting Shell Script Table Post 302879116 by Corona688 on Tuesday 10th of December 2013 01:44:20 PM

12-10-2013

Registered User

Standard input and output amount to pre-opened files. Usually, standard input is connected to your keyboard, and standard output is connected to your screen, but the shell lets you attach them to anything you want like this:

Code:

./myscript < inputfile > outputfile

< redirects standard input. Any commands you run in that script, and the read builtin, will read from inputfile instead of the keyboard.

> redirects standard output. Any commands you run, and the echo builtin, will write to outputfile instead of the terminal.

So when they are telling you to read from standard input, they are telling you to just read from the default with read and feed whatever you want into it later.

You use read like

Code:

read VAR1 VAR2 VAR3 VAR4

and if the first line is A B C D E, it effectively does VAR1="A"; VAR2="B" ; VAR3="C" ; VAR4="D E"

And 'standard output' just means 'print to the terminal with echo or whatever'.

We really can't give you a direct answer, we can give you the tools. And this should really be in the homework forum, please re-post there following the homework template.

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LEARN ABOUT MOJAVE

native2ascii

native2ascii(1) 					      General Commands Manual						   native2ascii(1)

NAME

       native2ascii - native to ASCII converter

SYNOPSIS

       native2ascii [ options ]
	    [ inputfile [outputfile]]

DESCRIPTION

       The  Java  compiler  and  other	Java  tools  can  only process files that contain Latin-1 or Unicode-encoded (udddd notation) characters.
       native2ascii converts files that contain other character encoding into files containing Latin-1 or Unicode-encoded charaters.

       If outputfile is omitted, standard output is used for output.  In addition, if inputfile is omitted, standard input is used for input.

OPTIONS

       The following options are supported:

       -encoding encoding_name
	    Specifies the encoding name that is used by the conversion procedure.  The default encoding is taken from system property  file.encod-
	    ing.   The encoding_name string must be one taken from the first column of the table of supported encodings in the Supported Encodings
	    document:

	    http://java.sun.com/j2se/1.5/docs/guide/intl/encoding.doc.html

       -reverse
	    Performs the reverse operation: converts a file with Latin-1 or Unicode-encoded characters to one with native-encoded characters.

       -Joption       Pass option to the Java virtual machine, where option is one of the options described on the man page for the java  applica-
		      tion  launcher, java(1). For example, -J-Xms48m sets the startup memory to 48 megabytes. It is a common convention for -J to
		      pass options to the underlying virtual machine.

								    22 Jun 2004 						   native2ascii(1)

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