Hi, Perhaps someone can help me with this:
When I try to stop a scan with scanimage using Ctrl+C on OS/2 the System crashes ( TRAP D). This is probably a fault of the driver used for SCSI-access. I can work around this problem by encapsulating all DosDevIOCtl() functions in a DosEnterMustComplete() DosExitMustComplete() pair. But this 'solution' is not perfect. When I now 'Ctrl+C' the scanner stops, the error-LED on the scanner (EPSON GT-9500) lights up and scanimage tells: scanimage.exe: received signal 2 scanimage.exe: trying to stop scanner and _wait's_ until I SIGKILL the process (second Ctrl+C doesn't work). - How to tell scanimage that the scanner allready has stopped? - How do I reset the scanner so that the error-led turns off again? (OK I can use the RESET-button of my EPSON-Scanner, but other scanners probably don't have a RESET-Button) Probably some atexit() function but where and how to place it, scanimage allready has one? In a second approach I've tried the following: /* Prevent the calling process from being killed */ sigfillset(&all); sigprocmask(SIG_BLOCK, &all, &oldset); DosDevIOCtl() /* Now it is ok to be killed */ sigprocmask(SIG_SETMASK, &oldset, NULL); But this way the machine still crashes hard when entering Ctrl+C (Perhaps I made a mistake with the syntax?) - How do I correctly delay SIG_INT with unix-like functions? Hoping for some enlightenment, Franz
