Re: 4gl Program's Parent Dies, Child Continues

Paul J. Mantyla wrote: > We have a compiled 4gl program which runs another compiled 4gl program. > Both the parent process and the child process are interactive. If the parent > process is killed, it seems as if both the underlying shell (ksh) and the > child process try to claim the terminal, resulting in an unusable terminal. 4GL does its own screen handling, resulting in the terminal being left in raw mode with echo off. Try typing "stty sane" blindly, followed by a "Ctrl-J" or "Ctrl-M", maybe that will set the terminal back into normal operation mode. > If the shell process is killed, the child process continues. However it > has lost it's terminal and goes into and infinite loop, consuming 100% of > the cpu on the system. That's a behavior we're seeing, too (SNI RM400, SINIX 5.42). It happens when a PC user with terminal emulation under windows just crashes his PC or exits Windows without properly terminating the application. 4GL programs then loose their controlling terminal and go berserk. Kill -15 usually helps, but sometimes kill -12 is necessary. Kill -9 only as a last resort, and NEVER for the sqlturbo process if you are using Online! Hope this helps, Richard -- +--------------------------+------------------------------------------+ | Dr. Richard Spitz | INTERNET: spitz@ana.med.uni-muenchen.de | | EDV-Gruppe Anaesthesie | Tel : +49-89-7095-3413 | | Klinikum Grosshadern | FAX : +49-89-7095-8886 | | 81366 Munich, Germany | | +--------------------------+------------------------------------------+