Arch Linux

Description:

Upon removal of a USB wireless adapter, netctl@wlan0 or netctl-auto@wlan0 (wlan0 for example) does not clean up after itself and fails to restart cleanly upon reattachment of the device. In order to have netctl or netctl-auto you need to remove some temporary files first, only after these files are removed will netctl-auto restart properly.

Additional info:
* package version(s)
netctl version 1.11

* config and/or log files etc.
-- Logs begin at Tue 2015-09-29 00:37:42 UTC. --
Oct 23 22:36:24 beluga dhcpcd[7154]: wlan0: soliciting a DHCP lease
Oct 23 22:36:28 beluga dhcpcd[7154]: wlan0: offered 192.168.200.178 from 192.168.200.1
Oct 23 22:36:28 beluga dhcpcd[7154]: wlan0: ignoring offer of 192.168.200.178 from 192.168.200.1
Oct 23 22:36:28 beluga dhcpcd[7154]: wlan0: probing static address 192.168.200.178/24
Oct 23 22:36:33 beluga dhcpcd[7154]: wlan0: leased 192.168.200.178 for 259200 seconds
Oct 23 22:36:33 beluga dhcpcd[7154]: wlan0: adding route to 192.168.200.0/24
Oct 23 22:36:33 beluga dhcpcd[7154]: wlan0: adding default route via 192.168.200.1
Oct 23 22:36:48 beluga systemd[1]: Started Automatic wireless network connection using netctl profiles.
Oct 23 22:37:21 beluga wpa_actiond[7142]: Interface 'wlan0' lost connection to network 'picostation'
Oct 23 22:37:51 beluga wpa_actiond[7142]: Interface 'wlan0' reestablished connection to network 'picostation'
Oct 24 15:06:24 beluga wpa_actiond[7142]: Interface 'wlan0' lost connection to network 'picostation'
Oct 24 15:06:24 beluga dhcpcd[7264]: wlan0: dhcp if_readrawpacket: Network is down
Oct 24 15:06:24 beluga dhcpcd[7264]: wlan0: removing IP address 192.168.200.178/24
Oct 24 15:06:24 beluga dhcpcd[7264]: wlan0: deleting route to 192.168.200.0/24
Oct 24 15:06:24 beluga dhcpcd[7264]: wlan0: deleting default route via 192.168.200.1
Oct 24 15:06:24 beluga systemd[1]: Stopping Automatic wireless network connection using netctl profiles...
Oct 24 15:06:24 beluga wpa_actiond[7142]: Interface 'wlan0' disconnected from network 'picostation'
Oct 24 15:06:24 beluga dhcpcd[25704]: sending signal TERM to pid 7264
Oct 24 15:06:24 beluga dhcpcd[25704]: waiting for pid 7264 to exit
Oct 24 15:06:24 beluga dhcpcd[7264]: wlan0: removing interface
Oct 24 15:06:35 beluga systemd[1]: Stopped Automatic wireless network connection using netctl profiles.
Oct 24 15:06:51 beluga systemd[1]: Stopped Automatic wireless network connection using netctl profiles.
Oct 24 15:06:51 beluga systemd[1]: Starting Automatic wireless network connection using netctl profiles...
Oct 24 15:06:52 beluga netctl-auto[25870]: Could not create the configuration file for interface 'wlan0'
Oct 24 15:06:52 beluga systemd[1]: netctl-auto@wlan0.service: Control process exited, code=exited status=1
Oct 24 15:06:52 beluga systemd[1]: Failed to start Automatic wireless network connection using netctl profiles.
Oct 24 15:06:52 beluga systemd[1]: netctl-auto@wlan0.service: Unit entered failed state.
Oct 24 15:06:52 beluga systemd[1]: netctl-auto@wlan0.service: Failed with result 'exit-code'.
Oct 24 15:07:21 beluga systemd[1]: Stopped Automatic wireless network connection using netctl profiles.
Oct 24 15:07:21 beluga systemd[1]: Starting Automatic wireless network connection using netctl profiles...
Oct 24 15:07:21 beluga netctl-auto[25945]: Included profile 'wlan0-picostation'
Oct 24 15:07:21 beluga netctl-auto[25945]: Included profile 'wlan0-Starbucks WiFi'
Oct 24 15:07:22 beluga wpa_actiond[25967]: Starting wpa_actiond session for interface 'wlan0'
Oct 24 15:07:22 beluga systemd[1]: Started Automatic wireless network connection using netctl profiles.
Oct 24 15:07:33 beluga wpa_actiond[25967]: Interface 'wlan0' connected to network 'picostation'
Oct 24 15:07:33 beluga dhcpcd[25993]: DUID 00:01:00:01:1d:a7:e8:c0:c4:e9:84:18:0c:77
Oct 24 15:07:33 beluga dhcpcd[25993]: wlan0: IAID 27:12:ac:19
Oct 24 15:07:34 beluga dhcpcd[25993]: wlan0: rebinding lease of 192.168.200.178
Oct 24 15:07:34 beluga dhcpcd[25993]: wlan0: probing static address 192.168.200.178/24
Oct 24 15:07:39 beluga dhcpcd[25993]: wlan0: leased 192.168.200.178 for 259200 seconds
Oct 24 15:07:39 beluga dhcpcd[25993]: wlan0: adding route to 192.168.200.0/24
Oct 24 15:07:39 beluga dhcpcd[25993]: wlan0: adding default route via 192.168.200.1

Steps to reproduce:
[root@beluga network]# systemctl start netctl-auto@wlan0
#*Physically remove the USB wireless adapter*
[root@beluga network]# systemctl status netctl-auto@wlan0 #(unit should be failed)
#*Physically reattach the USB wireless adapter*
[root@beluga network]# systemctl restart netctl-auto@wlan0 #(unit should fail to start because of the presence of temprary files)
[root@beluga network]# rm /run/network/wpa_supplicant_wlan0.conf
[root@beluga network]# systemctl restart netctl-auto@wlan0
[root@beluga network]# systemctl status netctl-auto@wlan0 #unit should be active again