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Full Discussion: Building JSON command with bash script
Top Forums Shell Programming and Scripting Building JSON command with bash script Post 303038955 by psysc0rpi0n on Wednesday 18th of September 2019 08:59:02 AM
Old 09-18-2019
Hello again.

Well, I'm already using it (since yesterday which was when I found it - jq I mean).

So, I'll be a little bit more accurate about the thing.
The app is to process bitcoin payments to several bitcoin addresses. These addresses are in a file. One address per line.
The code I have (I cannot share it right now because I'm at work and the code I have in Github is not updated with the one I have in my personal laptop) reads the file, line by line, counts how many lines it read, then checks how much BTC there is in a certain wallet and divides that value by the number of addresses loaded from the file. This way, the available BTC amount is equally sent to as many addresses that were loaded from the file.

The only thing missing in my script is building this long command.
I'll share the code I have at the moment, later when I get home.

But the way I built it was by preppending the leading special chars to a variable, then appending each address loaded from the file already wrapped in braces, backslash and double quotes. Something like:

Code:
load_addresses # this is a function
BTCsendVal=$(printf "%.8f" $(bitcoin-cli -getbalance / $numberAddr | bc -l)) # evaluate the amount of BTC to send to each loaded address
com_params="\"\" \"{"
count=0
for i in $addr_list
count++
do
    if [[ $count -eq $numberAddr ]]; then
         com_param+="\\\"$i\\\""
    else
        com_param+="\\\"$i\\\","
done
com_params+="$params_n"
com_params+="params_[n+1]"
#etc etc

........

I might have missed some details in this code. I can't remember all the details accuratelly of the code I have, but this way, the command parameters will be seen as a single very long string!

I have some questions before I can even start playing with 'jq'.

The first parameter/argument is a double quotes with nothing inside it. Docs says its for back compatibility. But is this first parameter also considered a JSON element/or whatever it can be called?

What about the other parameters that are not wrapped in {}s or []s ???? Are those also to be processed by 'jq'?
 

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LEARN ABOUT DEBIAN

masqmail.aliases

masqmail.aliases(5)						   File Formats 					       masqmail.aliases(5)

NAME

       masqmail.aliases - masqmail alias file format

DESCRIPTION

       This man page describes the format of the masqmail alias file.  Its usual location is /etc/aliases.

FILE FORMAT

       The  alias  file consists of lines of the form: local_part: item1, item2, ...  Items can be surrounded by double quotes `"'.  If within the
       quotes other quotes are needed for an address they can be escaped with a leading backslash `'.

       A leading backslash `' indicates that this address shall not be further expanded.

       A leading pipe symbol `|' indicates that the item shall be treated as a pipe command.  The content of the message will then be sent to  the
       standard  input	of a command.  The command will run under the user id and group id masqmail is running as.  If quotes are needed, the pipe
       symbol must appear within the quotes.

       Loops will be detected, the offending address will be ignored.

       Aliases will be expanded at delivery time.  This means that if there is a message still in the queue and you change any alias which matches
       one of the recipient addresses, the change will have effect next time a delivery is attemped.

       There is no need to restart masqmail or run any command when the alias file has been changed.

AUTHOR

       Masqmail was written by Oliver Kurth.  It is now maintained by Markus Schnalke <meillo@marmaro.de>.

       You  will find the newest version of masqmail at http://marmaro.de/prog/masqmail/.  There is also a mailing list, you will find information
       about it at masqmail's main site.

BUGS

       Please report bugs to the mailing list.

SEE ALSO

       masqmail.conf(5), masqmail(8),

masqmail-0.2.30 						    2011-07-27						       masqmail.aliases(5)
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