walt@walt (07/04/90)
I have a program which I am running under UNIX System V/386 Release 3.2, and I am having trouble catching with interrupt handling. Here's the problem: The process switches between two virtual terminal screens. I have a signal handler to catch the interrupt signal, and I want to be able to catch this signal when either screen is being displayed. However, according to the manual (Release 3.2 System Administrator's Reference manual), TERMIO(7) page 1 "The very first terminal file opened by the process group becomes the control terminal for that process group. The control terminal plays a special role in handling quit and interrupt signals, as discussed below." Apparently, the control terminal sends the signal to controlling process and any other terminal owned by the same process does not. Consequently, when the first terminal is being displayed ^C handling works just fine, but when the second virtual terminal is in use the interrupt signal seems to get swallowed up and not sent on to the process. It does clear out the input buffer but that is all it does. No signal is sent to the process. Does anyone out there know how I can get around this problem? -- Walter Holladay | walt@walt.hf.intel.com Intel DTO, Hillsboro, OR 97124 | uunet!intelhf!walt!walt