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jc/README.md
Kelly Brazil 756c2bc9ac add acknowledgments
2019-10-18 09:57:10 -07:00

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# JC
JSON CLI output utility
`jc` is used to JSONify the output of many standard linux cli tools for easier parsing in scripts. Parsers for `ls`, `ifconfig`, and `netstat` are currently included and more can be added via modules.
This allows further command line processing of output with tools like `jq` simply by piping commands:
```
$ ls -l /usr/bin | jc --ls | jq .[] | jq 'select(.bytes > 50000000)'
{
"filename": "emacs",
"flags": "-r-xr-xr-x",
"links": 1,
"owner": "root",
"group": "wheel",
"bytes": 117164432,
"date": "May 3 22:26"
}
```
## Installation
```
$ pip3 install jc
```
## Usage
`jc` accepts piped input from `STDIN` and outputs a JSON representation of the previous command's output to `STDOUT`. The JSON output can be compact or pretty formatted.
The first argument is required and identifies the command that is piping output to `jc` input. For example:
- `--ls` enables the `ls` parser
- `--ifconfig` enables the `ifconfig` parser
- `--netstat` enables the `netstat` parser
The second `-p` argument is optional and specifies whether to pretty format the JSON output.
## Examples
### ls
```
$ ls -l /bin | jc --ls -p
[
{
"filename": "bash",
"flags": "-r-xr-xr-x",
"links": 1,
"owner": "root",
"group": "wheel",
"bytes": 618416,
"date": "May 3 22:26"
},
{
"filename": "cat",
"flags": "-rwxr-xr-x",
"links": 1,
"owner": "root",
"group": "wheel",
"bytes": 23648,
"date": "May 3 22:26"
},
{
"filename": "chmod",
"flags": "-rwxr-xr-x",
"links": 1,
"owner": "root",
"group": "wheel",
"bytes": 30016,
"date": "May 3 22:26"
},
...
]
```
### ifconfig
```
$ ifconfig | jc --ifconfig -p
[
{
"name": "docker0",
"flags": "4099",
"state": "UP,BROADCAST,MULTICAST",
"mtu": "1500",
"ipv4_addr": "172.17.0.1",
"ipv4_mask": "255.255.0.0",
"ipv4_bcast": "0.0.0.0",
"mac_addr": "02:42:53:18:31:cc",
"type": "Ethernet",
"rx_packets": "0",
"rx_errors": "0",
"rx_dropped": "0",
"rx_overruns": "0",
"rx_frame": "0",
"tx_packets": "0",
"tx_errors": "0",
"tx_dropped": "0",
"tx_overruns": "0",
"tx_carrier": "0",
"tx_collisions": "0",
"ipv6_addr": null,
"ipv6_mask": null,
"ipv6_scope": null,
"metric": null
},
{
"name": "ens33",
"flags": "4163",
"state": "UP,BROADCAST,RUNNING,MULTICAST",
"mtu": "1500",
"ipv4_addr": "192.168.71.135",
"ipv4_mask": "255.255.255.0",
"ipv4_bcast": "192.168.71.255",
"ipv6_addr": "fe80::c1cb:715d:bc3e:b8a0",
"ipv6_mask": "64",
"ipv6_scope": "link",
"mac_addr": "00:0c:29:3b:58:0e",
"type": "Ethernet",
"rx_packets": "26348",
"rx_errors": "0",
"rx_dropped": "0",
"rx_overruns": "0",
"rx_frame": "0",
"tx_packets": "5308",
"tx_errors": "0",
"tx_dropped": "0",
"tx_overruns": "0",
"tx_carrier": "0",
"tx_collisions": "0",
"metric": null
},
{
"name": "lo",
"flags": "73",
"state": "UP,LOOPBACK,RUNNING",
"mtu": "65536",
"ipv4_addr": "127.0.0.1",
"ipv4_mask": "255.0.0.0",
"ipv4_bcast": null,
"ipv6_addr": "::1",
"ipv6_mask": "128",
"ipv6_scope": "host",
"mac_addr": null,
"type": "Local Loopback",
"rx_packets": "64",
"rx_errors": "0",
"rx_dropped": "0",
"rx_overruns": "0",
"rx_frame": "0",
"tx_packets": "64",
"tx_errors": "0",
"tx_dropped": "0",
"tx_overruns": "0",
"tx_carrier": "0",
"tx_collisions": "0",
"metric": null
}
]
```
### netstat
```
$ netstat -p | jc --netstat -p
{
"client": {
"tcp": {
"ipv4": [
{
"local_address": "localhost.localdo",
"local_port": "34480",
"foreign_address": "lb-192-30-255-113",
"foreign_port": "https",
"state": "ESTABLISHED",
"pid": 53550,
"program_name": "git-remote-ht",
"receive_q": 0,
"send_q": 0
},
{
"local_address": "localhost.localdo",
"local_port": "34478",
"foreign_address": "lb-192-30-255-113",
"foreign_port": "https",
"state": "ESTABLISHED",
"pid": 53550,
"program_name": "git-remote-ht",
"receive_q": 0,
"send_q": 0
}
]
}
}
}
```
```
$ netstat -lp | jc --netstat -p
{
"server": {
"tcp": {
"ipv4": [
{
"local_address": "localhost",
"local_port": "smtp",
"foreign_address": "0.0.0.0",
"foreign_port": "*",
"state": "LISTEN",
"pid": 1594,
"program_name": "master",
"receive_q": 0,
"send_q": 0
},
{
"local_address": "0.0.0.0",
"local_port": "ssh",
"foreign_address": "0.0.0.0",
"foreign_port": "*",
"state": "LISTEN",
"pid": 21918,
"program_name": "sshd",
"receive_q": 0,
"send_q": 0
}
],
"ipv6": [
{
"local_address": "localhost",
"local_port": "smtp",
"foreign_address": "[::]",
"foreign_port": "*",
"state": "LISTEN",
"pid": 1594,
"program_name": "master",
"receive_q": 0,
"send_q": 0
},
{
"local_address": "[::]",
"local_port": "ssh",
"foreign_address": "[::]",
"foreign_port": "*",
"state": "LISTEN",
"pid": 21918,
"program_name": "sshd",
"receive_q": 0,
"send_q": 0
}
]
},
"udp": {
"ipv4": [
{
"local_address": "0.0.0.0",
"local_port": "bootpc",
"foreign_address": "0.0.0.0",
"foreign_port": "*",
"pid": 13903,
"program_name": "dhclient",
"receive_q": 0,
"send_q": 0
},
{
"local_address": "localhost",
"local_port": "323",
"foreign_address": "0.0.0.0",
"foreign_port": "*",
"pid": 30926,
"program_name": "chronyd",
"receive_q": 0,
"send_q": 0
}
],
"ipv6": [
{
"local_address": "localhost",
"local_port": "323",
"foreign_address": "[::]",
"foreign_port": "*",
"pid": 30926,
"program_name": "chronyd",
"receive_q": 0,
"send_q": 0
}
]
}
}
}
```
## Acknowledgments
- `ifconfig-parser` module from https://github.com/KnightWhoSayNi/ifconfig-parser
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