Now I understand your use-case. You probably could achieve similar with $ systemctl status bluetooth.service. Also hcitool can tell if the adapter is up and running but keep in mind that hcitool is depreciated and no longer maintained by the upstream.
As for the man entry suggestion yes that could be something to consider given that the default man page is quite vague nevertheless this, as whole bluez, comes straight from the upstream. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to bluez in Ubuntu. https://bugs.launchpad.net/bugs/1565940 Title: bluetoothctl systematically hangs when there is no bluetooth hardware Status in bluez package in Ubuntu: New Bug description: On a machine WITH bluetooth hardware, the 'bluetoothctl' command works correctly. For example, the command 'bluetoothctl < /dev/null' terminates correctly. On a machine WITHOUT bluetooth hardware, the 'bluetoothctl' command systematically hangs. Even the command 'bluetoothctl < /dev/null' systematically hangs. $ bluetoothctl & [1] 6208 $ ps -l $! F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 0 T 1001 6208 2525 0 80 0 - 9578 signal pts/1 0:00 bluetoothctl [1]+ Stopped bluetoothctl ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: bluez 5.35-0ubuntu2 ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4 Uname: Linux 4.2.0-34-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 CurrentDesktop: X-Cinnamon Date: Mon Apr 4 20:09:39 2016 InstallationDate: Installed on 2015-07-20 (259 days ago) InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422) InterestingModules: bluetooth MachineType: To be filled by O.E.M. To be filled by O.E.M. ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-34-generic.efi.signed root=UUID=0d11df61-c758-41b1-9ec3-8310bf038b07 ro quiet splash vt.handoff=7 SourcePackage: bluez UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2015-10-22 (165 days ago) dmi.bios.date: 06/26/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2603 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: M5A97 R2.0 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2603:bd06/26/2015:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A97R2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: To be filled by O.E.M. hciconfig: rfkill: syslog: avril 03 15:10:45 urbah-sirius systemd[1]: Starting Automatic USB/Bluetooth printer setup (-devices-pci0000:00-0000:00:12.2-usb5-5\x2d5)... avril 03 15:10:45 urbah-sirius NetworkManager[986]: <info> Loaded device plugin: NMBluezManager (/usr/lib/x86_64-linux-gnu/NetworkManager/libnm-device-plugin-bluetooth.so) avril 03 15:10:50 urbah-sirius systemd[1]: Started Automatic USB/Bluetooth printer setup (-devices-pci0000:00-0000:00:12.2-usb5-5\x2d5). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1565940/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
