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Re: POSIX conformance in Solaris

X-seq: zsh-workers 20699
From: Danek Duvall <duvall@xxxxxxxxxxxxxx>
To: zsh-workers@xxxxxxxxxx
Subject: Re: POSIX conformance in Solaris
Date: Wed, 12 Jan 2005 08:12:52 -0800
In-reply-to: <20050112091800.GA4486@sc>
Mail-followup-to: Danek Duvall <duvall@xxxxxxxxxxxxxx>, zsh-workers@xxxxxxxxxx
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References: <m3r7kr31g9.fsf@xxxxxxxxxxxx> <20050112091800.GA4486@sc>

On Wed, Jan 12, 2005 at 09:18:00AM +0000, Stephane Chazelas wrote:

> tail -n 1, even if POSIX, is not portable. I think I've come
> across a system where it was not supported recently (maybe
> Solaris).

Very possible.  When POSIX introduces an interface that would break
compatibility with already released Solaris commands, the functionality
gets stuck in /usr/xpg?.  So in this case /usr/bin/tail doesn't require (or
even support) -n, while /usr/xpg4/bin/tail supports (but doesn't require)
it.

Danek

References:
- POSIX conformance in coreutils
  - From: Vin Shelton
- Re: POSIX conformance in coreutils
  - From: Stephane Chazelas

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