tracetree

Run a process, ptrace'ing it and all of its children, and print the entire process tree at the end.

Currently only Linux support is implemented.

Examples

Print a process tree in text format to stdout:

$ tracetree /bin/bash -c '/bin/sleep 1; /bin/sleep 1'
16665 bash -c /bin/sleep 1; /bin/sleep 1 [2.004s]
	16666 sleep 1 [1.001s]
	16667 sleep 1 [1.000s]

Print a process tree in JSON format to output.json:

$ tracetree -f json -o output.json /bin/bash -c '/bin/sleep 1; /bin/sleep 1'
$ python -mjson.tool output.json
{
    "children": [
        {
            "children": [],
            "cmdline": [
                "/bin/sleep",
                "1"
            ],
            "ended": "2017-06-22T06:28:58.960384212-04:00",
            "pid": 16727,
            "started": "2017-06-22T06:28:57.959636824-04:00"
        },
        {
            "children": [],
            "cmdline": [
                "/bin/sleep",
                "1"
            ],
            "ended": "2017-06-22T06:28:59.961990469-04:00",
            "pid": 16728,
            "started": "2017-06-22T06:28:58.960849779-04:00"
        }
    ],
    "cmdline": [
        "/bin/bash",
        "-c",
        "/bin/sleep 1; /bin/sleep 1"
    ],
    "ended": "2017-06-22T06:28:59.962407641-04:00",
    "pid": 16726,
    "started": "2017-06-22T06:28:57.958836370-04:00"
}

JSON output can be viewed with this web visualizer: