How to resolve the algorithm Get system command output step by step in the Icon and Unicon programming language

Published on 12 May 2024 09:40 PM
#Icon and unicon

How to resolve the algorithm Get system command output step by step in the Icon and Unicon programming language

Table of Contents

Problem Statement

Execute a system command and get its output into the program. The output may be stored in any kind of collection (array, list, etc.).

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Get system command output step by step in the Icon and Unicon programming language

Source code in the icon programming language

#
# piped.icn, Get system command output
#
# Dedicated to the public domain
#
procedure main()
    # start with an empty list
    directory := []

    # ls for UNIX, dir for other, assume Windows
    command := if &features == "UNIX" then "ls" else "dir"

    # open command in pipe mode
    p := open(command, "p") | stop("Cannot open pipe for ", command)

    # read in results and append to list
    while put(directory, read(p))

    # display the fifth entry, if there is one
    write(\directory[5])

    close(p)
end

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