Hi Rodrigo, Based on your direct message on LinkedIn I think you already found it, right?
RTOS Features-> Tasks & Scheduling-> [*] Support parent/child task relationship I think the current behavior is expected for a POSIX / Unix SO, please take a look: http://morningcoffee.io/killing-a-process-and-all-of-its-descendants.html BR, Alan On 5/28/21, Rodrigo Garcia <rpgar...@gmail.com> wrote: > Hello all, > > My issue is related to testing the SIGKILL in Nuttx and not making it work > correctly. > > Description: > ========= > I am using a ESP32 DevKitC Board using default NSH configuration. > > 1) Enabled CONFIG_SIG_DEFAULT=y and CONFIG_SCHED_HAVE_PARENT=y > 2) After starting the board, type "sh" + <enter> 3 times. Run "ps": > > nsh> sh > nsh> sh > nsh> sh > nsh> ps > PID PPID PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK > COMMAND > 0 0 0 FIFO Kthread N-- Ready 00000000 003072 > Idle Task > 1 0 100 RR Task --- Waiting Signal 00000000 002096 > init > 4 1 100 RR Task --- Waiting Signal 00000000 002096 sh > 5 4 100 RR Task --- Waiting Signal 00000000 002096 sh > 6 5 100 RR Task --- Running 00000000 002096 sh > > 3) kill the parent "sh" and try to run "ps" > Result is a situation where it is very hard to type any command, as seen > below: > > nsh> kill -9 4 > nsh> nsh> > nsh> > nsh> ps > nsh: p: command not found > nsh> sp > nsh: ss: command not found > nsh> ps > nsh: pp: command not found > nsh> ss > nsh: ss: command not found > nsh> pps > nsh: p: command not found > nsh> ps > nsh: spsp: command not found > nsh> sp > nsh: ss: command not found > nsh> sp > PID PPID PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK > COMMAND > 0 0 0 FIFO Kthread N-- Ready 00000000 003072 > Idle Task > 1 0 100 RR Task --- Ready 00000000 002096 > init > 5 4 100 RR Task --- Waiting Signal 00000000 002096 sh > 6 5 100 RR Task --- Running 00000000 002096 sh > > 4) As above, none of the children were killed... and I think that init (pid > 1) and sh (pid 6) are both reading the console input, generating all those > "sort of typing errors" above. I had to type "sp" to run "ps". > > Question: > Do I need to set up some other option on menuconfig in order to kill the > pid of the parent and all its children all together? > > Best Regards, > Rodrigo Garcia. >