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# Uses the inline script metadata Python Enhancment Proposal (PEP 723) |
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# To install UV: https://docs.astral.sh/uv/getting-started/installation/ |
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# To run with UV: uv run share_my_wifi_qr_code.py |
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# /// script |
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# requires-python = ">=3.12" |
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# dependencies = ["qrcode-terminal"] |
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# /// |
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import shutil |
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import subprocess |
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import sys |
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import qrcode_terminal |
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def run(command: list[str]) -> str: |
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process = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, text=True) |
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if process.returncode != 0: |
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return "" |
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return process.stdout.strip() |
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def escape(text: str) -> str: |
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text = text.replace("\\", "\\\\") |
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text = text.replace(";", "\\;") |
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text = text.replace(",", "\\,") |
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text = text.replace(":", "\\:") |
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text = text.replace('"', '\\"') |
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return text |
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if shutil.which("nmcli") is None: |
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print("Missing 'nmcli'. This needs NetworkManager.") |
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sys.exit(1) |
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wifi_device = "" |
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for line in run(["nmcli", "-t", "-f", "DEVICE,TYPE,STATE", "dev"]).splitlines(): |
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parts = line.split(":") |
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if len(parts) >= 3 and parts[1] == "wifi" and parts[2] == "connected": |
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wifi_device = parts[0] |
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break |
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if not wifi_device: |
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print("No connected Wi-Fi device found.") |
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sys.exit(1) |
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connection_name = "" |
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for line in run(["nmcli", "-t", "-f", "NAME,DEVICE", "connection", "show", "--active"]).splitlines(): |
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parts = line.split(":") |
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if len(parts) == 2 and parts[1] == wifi_device: |
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connection_name = parts[0] |
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break |
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if not connection_name: |
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print("No active Wi-Fi connection profile found.") |
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sys.exit(1) |
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ssid = run(["nmcli", "-t", "-f", "802-11-wireless.ssid", "connection", "show", connection_name]) |
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if not ssid: |
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for line in run(["nmcli", "-t", "-f", "active,ssid", "dev", "wifi"]).splitlines(): |
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parts = line.split(":") |
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if len(parts) == 2 and parts[0] == "yes": |
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ssid = parts[1] |
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break |
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if not ssid: |
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print("Could not determine SSID.") |
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sys.exit(1) |
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security_key_management = run( |
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["nmcli", "-t", "-f", "802-11-wireless-security.key-mgmt", "connection", "show", connection_name] |
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) |
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enterprise_eap = run(["nmcli", "-t", "-f", "802-1x.eap", "connection", "show", connection_name]) |
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hidden_setting = run(["nmcli", "-t", "-f", "802-11-wireless.hidden", "connection", "show", connection_name]) |
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passphrase_psk = run( |
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["nmcli", "-s", "--show-secrets", "-g", "802-11-wireless-security.psk", "connection", "show", connection_name] |
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) |
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passphrase_wep = run( |
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["nmcli", "-s", "--show-secrets", "-g", "802-11-wireless-security.wep-key0", "connection", "show", connection_name] |
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) |
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if enterprise_eap: |
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print("Enterprise EAP network. Phone QR join is usually not supported.") |
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sys.exit(1) |
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ssid_escaped = escape(ssid) |
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hidden_flag = "" |
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if hidden_setting.strip().lower() == "yes": |
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hidden_flag = ";H:true" |
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wifi_payload = "" |
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display_password = None # type: str | None |
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if passphrase_psk: |
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display_password = passphrase_psk |
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wifi_payload = f"WIFI:T:WPA;S:{ssid_escaped};P:{escape(passphrase_psk)}{hidden_flag};;" |
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if wifi_payload == "" and passphrase_wep: |
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display_password = passphrase_wep |
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wifi_payload = f"WIFI:T:WEP;S:{ssid_escaped};P:{escape(passphrase_wep)}{hidden_flag};;" |
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if wifi_payload == "" and not security_key_management: |
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display_password = "" |
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wifi_payload = f"WIFI:T:nopass;S:{ssid_escaped}{hidden_flag};;" |
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if wifi_payload == "": |
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wifi_payload = f"WIFI:T:WPA;S:{ssid_escaped}{hidden_flag};;" |
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print(f"\nScan to join: {ssid}") |
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if display_password is None: |
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print("Password not readable. If this is a system connection, try: sudo uv run share_my_wifi_qr_code.py") |
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if display_password == "": |
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print("Open network (no password)") |
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if display_password not in (None, ""): |
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print(f"Password: {display_password}") |
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qrcode_terminal.draw(wifi_payload) |
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print() |
