From mboxrd@z Thu Jan  1 00:00:00 1970
From: arisawa <arisawa@ar.aichi-u.ac.jp>
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Message-Id: <63E9BCDE-8F08-40AF-89C4-E50FF60F2BDF@ar.aichi-u.ac.jp>
Date: Sun, 14 Sep 2014 11:54:30 +0900
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: [9fans] segattach in telnetd
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Hello,

we have an example for segattach() in /sys/src/cmd/ip/telnetd.c

void*
share(ulong len)
{
	uchar *vastart;

	vastart = sbrk(0);
	if(vastart == (void*)-1)
		return 0;
	vastart += 2*1024*1024;

	if(segattach(0, "shared", vastart, len) == (void*)-1)
		return 0;

	return vastart;
}

I think it should be
-	if(segattach(0, "shared", vastart, len) == (void*)-1)
+	if((vastart = segattach(0, "shared", vastart, len)) == (void*)-1)

Kenji Arisawa