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From: paul@CAEN.ENGIN.UMICH.EDU (Paul Killey)
Newsgroups: comp.sys.apollo
Subject: signals on domain/os.
Message-ID: <4eb271297.000f088@caen.engin.umich.edu>
Date: 19 Dec 90 22:35:13 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22


This is my latest discovery in comparative signalology.

this program behaves differently on apollos than on
suns or decs, where the behavior is the same.

main()
{
	pause();
	perror("pause");
}
pause()
{ sigpause(sigblock(0)); }


run the program, suspend it with ^Z, and fg it.

on apollos, the program exits and perror says "pause: Interrupted system call".
sending the process a SIGSTOP/SIGCONT does the same thing.

on the decs and suns, no perror, and the program
does not exit.