List Processes with open HCI Sockets

hci_socket_list.py

#!/usr/bin/env python3

import os

hci_sockets = []

with open('/proc/net/hci') as hcif:
    for line in hcif:
        if 'Inodes' in line:
            continue
        hci_sockets.append(line.split()[5])

pids = [
        pid for pid in os.listdir('/proc') if pid.isdigit()
]

pid_socket_map = {}

for pid in pids:
    proc_fd_path = '/proc/{}/fd'.format(pid)
    proc_links = []
    try:
        for fd in os.listdir(proc_fd_path):
            link_name = os.readlink("{}/{}".format(proc_fd_path, fd))
            if 'socket:' in link_name:
                proc_links.append(link_name)
        if len(proc_links) > 0:
            pid_socket_map[pid] = proc_links
    except:
        pass

hci_pids = []

for pid, sockets in pid_socket_map.items():
    for socket in sockets:
        for hci_socket in hci_sockets:
            if hci_socket in socket:
                if pid not in hci_pids:
                    hci_pids.append(pid)

print("\n".join(hci_pids))