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Path: utzoo!utgpu!water!watmath!clyde!rutgers!husc6!hao!oddjob!gargoyle!jpusa1!news
From: news@jpusa1.UUCP (usenet)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: wait3 emulation in SYSTEMV ??
Summary: it depends...
Message-ID: <643@jpusa1.UUCP>
Date: 15 Jan 88 00:15:52 GMT
References: <360@rruxa.UUCP> <7060@brl-smoke.ARPA>
Reply-To: stu@jpusa1.UUCP (Stu Heiss)
Organization: JPUSA - Chicago, IL
Lines: 25
Expires:
Followup-To:

In article <7060@brl-smoke.ARPA> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes:
-In article <360@rruxa.UUCP> jpage@rruxa.UUCP (J Page) writes:
->UNIX Wizards:  Anyone on the net have any suggestions, or ideas on
->	how to emulate the 4.2BSD wait3() system call under System V???
-
-Basically, you can't, at least not with the current release.
-

It depends on what you're trying to do.  If all you need is a nonblocking wait
you can do something like:

noop(){;}
nonblockingwait()
{
	int i, w;
	int (*oldsig)() = signal(SIGALRM, noop);
	int oldalrm = alarm(1);
	i = wait(&w);
	alarm(0);
	signal(SIGALRM, oldsig);
	alarm(oldalrm);
	...
}
--
Stu Heiss {gargoyle,ihnp4}!jpusa1!stu