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Top Forums Shell Programming and Scripting Running options in bash script Post 303011230 by drl on Monday 15th of January 2018 12:12:00 PM
Old 01-15-2018
Hi.

There are many schemes / methods / alternatives to help process command line -- CLI -- options. Here are a few. Some take a bit of effort to learn, but they will be time-savers in future work.

I especially like the ones that create man-like pages, and help displays automatically ... cheers, drl
Code:
Process command-line (CLI) options, arguments

        1) getopts, builtin, bash, ksh, zsh
           http://stackoverflow.com/questions/402377/using-getopts-in-bash-shell-script-to-get-long-and-short-command-line-options
           Also, search for option processing, including:
           http://mywiki.wooledge.org/ComplexOptionParsing

        2) perl: many, including libgetopt-euclid-perl, which
           creates man page, help automatically

        3) getopt, enhanced getopts, part of the util-linux, allows GNU "--"
           Examples: /usr/share/doc/util-linux/examples, 2016.03.27

        4) argp.sh, wrapper for getopt, creates man and help (text, XML), etc.
           Allows mixed options and arguments.
           Compiled argp.c -> argp for faster execution.
           https://sourceforge.net/projects/argpsh/, 2016.03.27

        5) shflags, wrapper for getopt, creates help, allow mixed options
           and arguments
           https://github.com/kward/shflags, 2016.08.01

        6) ksh getopts, enhanced, process GNU "--", creates man, help, etc.
           Examples: Learning the Korn Shell, O'Reilly, 2nd, p 380ff

        7) zsh zparseopts
           man zshmodules, part of zshutil

        8) Suggested option names:
           http://www.shelldorado.com/goodcoding/cmdargs.html#flagnames

 

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script(1)							   User Commands							 script(1)

NAME
script - make record of a terminal session SYNOPSIS
script [-a] [filename] DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the record is saved in the file typescript. See WARNINGS. The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends when the forked shell exits or when Control-d is typed. OPTIONS
The following option is supported: -a Appends the session record to filename, rather than overwriting it. NOTES
script places everything that appears on the screen in filename, including prompts. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a privileged user, that is, root. Be sure that typescript is not a link before running script. SunOS 5.10 30 Jan 2004 script(1)
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