Date: Sat, 10 Nov 2001 01:31:43 -0800 From: Bill Fenner <fenner@research.att.com> To: bde@zeta.org.au Cc: alfred@freebsd.org, cvs-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/fs/fifofs fifo_vnops.c Message-ID: <200111100931.BAA04711@windsor.research.att.com>
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>For read(), it is normal to have to spin if there is no writer and you >don't want to block. You don't get a choice. POSIX [seems to say] that a blocking read on a FIFO with no writers will return 0, forcing you to spin no matter what. FIFO permissions mean that it's possible that the reader cannot supply a phantom writer. Bill To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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