[PATCH 2/2] tuna: Replace python_ethtool with builtin funtionality

[John Kacur]

This patch replaces the dependency on python_ethtool with some
simplified functions to achieve the same result.

Reviewed-by: Federico Pellegrin <fede(a)evolware.org&gt;
- return 'tun' only if tun_flags exists
Signed-off-by: John Kacur <jkacur(a)redhat.com&gt;
---
 tuna-cmd.py         |  2 +-
 tuna/gui/irqview.py |  2 +-
 tuna/new_eth.py     | 37 +++++++++++++++++++++++++++++++++++++
 tuna/tuna.py        |  2 +-
 4 files changed, 40 insertions(+), 3 deletions(-)
 create mode 100755 tuna/new_eth.py

diff --git a/tuna-cmd.py b/tuna-cmd.py
index 297fd6e13318..79e33371837e 100755
--- a/tuna-cmd.py
+++ b/tuna-cmd.py
@@ -25,7 +25,7 @@ import fnmatch
 import gettext
 import locale
 from functools import reduce
-import ethtool
+import tuna.new_eth as ethtool
 import tuna.tuna_sched as tuna_sched
 import procfs
 from tuna import tuna, sysfs
diff --git a/tuna/gui/irqview.py b/tuna/gui/irqview.py
index 35fc3fd0b0ca..5143d6dc0df5 100755
--- a/tuna/gui/irqview.py
+++ b/tuna/gui/irqview.py
@@ -7,7 +7,7 @@ from gi.repository import Gtk
 from gi.repository import GObject
 import os
 from functools import reduce
-import ethtool
+import tuna.new_eth as ethtool
 import tuna.tuna_sched as tuna_sched
 
 import gi
diff --git a/tuna/new_eth.py b/tuna/new_eth.py
new file mode 100755
index 000000000000..98f9179d5695
--- /dev/null
+++ b/tuna/new_eth.py
@@ -0,0 +1,37 @@
+# Copyright (C) 2022 John Kacur
+""" A few functions similar to ethtool """
+import os
+import socket
+
+def get_active_devices():
+    """ return a list of network devices """
+    ret = []
+
+    for device in socket.if_nameindex():
+        ret.append(device[1])
+
+    return ret
+
+def get_module(intf):
+    """ return the kernel module for the given network interface
"""
+    if intf == 'lo':
+        return ""
+    myp = f'/sys/class/net/{intf}/device/driver'
+    if os.path.exists(myp):
+        return os.path.basename(os.readlink(myp))
+    if os.path.exists(f'/sys/class/net/{intf}/bridge'):
+        return 'bridge'
+    if os.path.exists(f'/sys/class/net/{intf}/tun_flags'):
+        return 'tun'
+    return ""
+
+if __name__ == "__main__":
+    nics = get_active_devices()
+    print(f'nics = {nics}')
+
+    for intf in nics:
+        driver = get_module(intf)
+        if driver:
+            print(f'{intf}, {driver}')
+        else:
+            print(f'{intf}')
diff --git a/tuna/tuna.py b/tuna/tuna.py
index 31707c9cb69c..84419c957b1b 100755
--- a/tuna/tuna.py
+++ b/tuna/tuna.py
@@ -9,7 +9,7 @@ import sys
 import shlex
 import fnmatch
 import platform
-import ethtool
+import tuna.new_eth as ethtool
 import procfs
 from procfs import utilist
 from tuna import help
-- 
2.37.3