Output of control commands using the JSON format

To simplify parsing command output when integrating with external platforms and web applications, fdpi_ctrl supports JSON output.

To enable JSON output, specify the following additional command-line parameter:

--outformat json

For convenient JSON processing, we recommend installing the jq utility:

yum install epel-release
yum-config-manager --disable epel
yum --enablerepo epel install jq

Examples:

1. Pretty-print the command output:

   fdpi_ctrl list all profile --policing --outformat json | jq .

2. Display statistics for different policing profiles:

   fdpi_ctrl list all --policing --outformat json | jq '.lpolicings[].description.name' | sort | uniq -c

   or produce the same statistics in JSON format using jq:

   fdpi_ctrl list all --policing --outformat json | jq '[{ name: .lpolicings[].description.name, login: .login }] | group_by(.name) | .[] | { name: .[0].name, count: . | length }'

3. For repeated use, this command can be wrapped in a Bash function:

   function fdpi_policing_stat() { fdpi_ctrl list all --policing --outformat json | jq '[{ name: .lpolicings[].description.name, login: .login }] | group_by(.name) | .[] | { name: .[0].name, count: . | length }'; }

   and then simply invoked from the command line:

   fdpi_policing_stat

To make such functions permanently available, save them in the .bash_profile file.