No such file or directory: '/etc/services'

[gssantana]

Describe the bug

Include the following information:

• OpenSnitch version. v1.6.0-rc.1
• OS: openSUSE Tumbleweed 20220607
• Version openSUSE Tumbleweed 20220607
• Window Manager: GNOME Shell
• Kernel version: Linux brain 5.18.1-1-default TypeError: pkt_callback() takes exactly 2 arguments (3 given) #1 SMP PREEMPT_DYNAMIC Mon May 30 07:49:01 UTC 2022 (d00e88d) x86_64 x86_64 x86_64 GNU/Linux

To Reproduce

After install opensnitch server and gui v1.6.0-rc.1, when I try to open opensnitch-ui, I get the error No such file or directory: '/etc/services'

Post error logs:

Themes not available. Install qt-material if you want to change GUI's appearance: pip3 install qt-material.
Loading translations: /usr/lib/python3/dist-packages/opensnitch/i18n locale: en_US
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
is new file, or IN MEMORY, setting initial schema version
setting schema version to: 1
setting schema version to: 1
schema version: 1
db schema is up to date
exception loading ipasn db: No module named 'pyasn'
Install python3-pyasn to display IP's network name.
Traceback (most recent call last):
File "/usr/bin/opensnitch-ui", line 74, in
service = UIService(app, on_exit)
File "/usr/lib/python3/dist-packages/opensnitch/service.py", line 92, in init
self._stats_dialog = StatsDialog(dbname="general", db=self._db, appicon=self.white_icon)
File "/usr/lib/python3/dist-packages/opensnitch/dialogs/stats.py", line 397, in init
self._fw_dialog = FirewallDialog(appicon=appicon)
File "/usr/lib/python3/dist-packages/opensnitch/dialogs/firewall.py", line 47, in init
self._fwrule_dialog = FwRuleDialog(appicon=self.appicon)
File "/usr/lib/python3/dist-packages/opensnitch/dialogs/firewall_rule.py", line 55, in init
self.net_srv = NetworkServices()
File "/usr/lib/python3/dist-packages/opensnitch/utils.py", line 323, in init
etcServices = open("/etc/services")
FileNotFoundError: [Errno 2] No such file or directory: '/etc/services'

[gustavo-iniguez-goya]

damn! thank you @gssantana

I'll generate a new release + GUI packages. Meanwhile you can just copy the file https://raw.githubusercontent.com/evilsocket/opensnitch/master/ui/opensnitch/utils.py to your installation directory (/usr/lib/python3/dist-packages/opensnitch/)

Or install setup on Fedora or netcfg on OpenSuse

[munix9]

@gustavo-iniguez-goya FYI:

According to the information in https://kubic.opensuse.org/blog/2019-12-05-usr-etc/, a possible solution could look like this:

--- a/ui/opensnitch/utils.py
+++ b/ui/opensnitch/utils.py
@@ -320,8 +320,12 @@ class NetworkServices():
     ports_list = []
 
     def __init__(self):
+        etcServicesPath = "/etc/services"
+        if not os.path.isfile(etcServicesPath) and os.path.isfile("/usr/etc/services"):
+            etcServicesPath = "/usr/etc/services"
+
         try:
-            etcServices = open("/etc/services")
+            etcServices = open(etcServicesPath)
             for line in etcServices:
                 if line[0] == "#":
                     continue
@@ -339,7 +343,7 @@ class NetworkServices():
             self.srv_array.append("wireguard/51820 WireGuard VPN")
             self.ports_list.append("51820")
         except Exception as e:
-            print("Error loading /etc/services:", e)
+            print("Error loading " + etcServicesPath + ":", e)
 
     def to_array(self):
         return self.srv_array

It first looks to see if an /etc/services exists. If not and a /usr/etc/services exists, this is used.

[gustavo-iniguez-goya]

Oh, I see, thank you!