Re: Cygwin Subprocesses on XEmacs

After thinking about this for awhile, it dawned on me that the problem is not with setsid() per se, but rather with the sequence of events _following_ the setsid() call. That is, setsid() causes some of the ensuing ioctl() (or similar) calls that set up the pty to fail. I think I have verified this behavior - I restored the old sysdep.c module and moved the disconnect_controlling_terminal() call [which calls setsid()] from right after the fork() to just before the exec() call and M-x shell works on Cygwin as it always has on linux. I will endeavor to create a STC for Cygwin that includes all the code involved in setting up the terminal so we can experiment with moving the setsid() call between the beginning and the end of the function.