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Full Discussion: Creating a config file with specified parameters
Top Forums Shell Programming and Scripting Creating a config file with specified parameters Post 303025509 by bakunin on Sunday 4th of November 2018 02:55:10 PM
Old 11-04-2018
Quote:
Originally Posted by multiverse22
I want to create a config file that has parameters that can be specified using - or -- (without an equals sign), as well as the ability to output the file using - or --. Could somebody point me to a generic script to do this?
You might want to investigate getopts to parse the command line, which will do a lot of the "cooking" already (tokenizing by word splitting, for instance). It will, nevertheless, restrict you to a predefined set of options you can pass this way. You can predefine it yourself but then you will have to stick with it (unless you chang the script). So the question is: is that sufficient for your purposes or not?

If it is, you might want to acquaint yourself with getopts first and then ask specific questions if you still need help. If this is not sufficient for your purpose, then i suppose you are on your own and i wouldn't know of any "generic" script you could use. You should perhaps start by deciding what your config files should look like:

- do you want to allow commentaries like this:
Code:
alpha = 1
# this is a line to be ignored
beta = 2

- do you want to allow inline commentaries like this:
Code:
alpha = 1     # this is a comment
beta = 2      # this is another comment

It is easy to dismiss such comments as unnecessary and complicating things but when you have longer complex configs you might want to have some comments explaining inplace why something is what it is and what were your reasons to put it there.

- will you need "chapters" in these config files, like in the Windows init-files-style:
Code:
[part1]
alpha =  1
beta = 2

[part2]
gamma = 3
delta = 4

and perhaps many more questions. You should, before trying to write a script, first define E-X-A-C-T-L-Y how the files you want to produce should look like. Decisions like this will not be easily corrected once you start programming and may well mean that you throw away a script that is already "almost" working and start anew.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

nsd-checkconf

nsd-checkconf(8)						    nsd 3.2.12							  nsd-checkconf(8)

NAME

       nsd-checkconf - NSD configuration file checker.

SYNOPSIS

       nsd-checkconf [-v] [-h] [-o option] [-z zonename] [-s keyname] configfile

DESCRIPTION

       nsd-checkconf  reads  a	configuration  file. It prints parse errors to standard error, and performs additional checks on the contents. The
       configfile format is described in nsd.conf(5).

       The utility of this program is to check a config file for errors before using it in nsd(8) or zonec(8). This program can also be  used  for
       shell scripts to access the nsd config file, using the -o and -z options.

OPTIONS

       -v     After  reading  print  the  options  to  standard output in configfile format. Without this option, only success or parse errors are
	      reported.

       -h     Print usage help information and exit.

       -o option
	      Return only this option from the config file. This option can to be used in conjunction with the -z option.  The special value zones
	      prints out a list of configured zones.

	      This  option  is primarily used by nsdc to parse the config file from the shell. If the -z option is given, but the -o option is not
	      given, nothing is printed.

       -s keyname
	      Prints the key secret (base64 blob) configured for this key in the config file. Used to help shell scripts parse the config file.

       -z zonename
	      Return the option specified with -o for zone 'zonename'.

	      If this option is not given, the server section of the config file is used.  This option is primarily used by nsdc to parse the con-
	      fig file from the shell.

	      The -o, -s and -z option print configfile options to standard output.

FILES

       /etc/nsd3/nsd.conf
	      default NSD configuration file

SEE ALSO

       nsd(8), nsdc(8), nsd.conf(5), nsd-notify(8), nsd-patch(8), nsd-xfer(8), zonec(8)

AUTHORS

       NSD was written by NLnet Labs and RIPE NCC joint team. Please see CREDITS file in the distribution for further details.

NLnet Labs							   jul 19, 2012 						  nsd-checkconf(8)
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