From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-18220-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 10641 invoked by alias); 15 Dec 2013 20:06:22 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
X-Seq: 18220
Received: (qmail 3144 invoked from network); 15 Dec 2013 20:06:16 -0000
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE
	autolearn=ham version=3.3.2
From: Bart Schaefer <schaefer@brasslantern.com>
Message-id: <131215120607.ZM20484@torch.brasslantern.com>
Date: Sun, 15 Dec 2013 12:06:07 -0800
In-reply-to: <20131214104823.GA16269@chrisdown.name>
Comments: In reply to Chris Down <chris@chrisdown.name>
 "Infinite history size" (Dec 14,  6:48pm)
References: <20131214104823.GA16269@chrisdown.name>
	<2151387021752@web29g.yandex.ru>	<20131214115345.GA17562@chrisdown.name>
In-reply-to: <20131214115345.GA17562@chrisdown.name>
Comments: In reply to Chris Down <chris@chrisdown.name>
 "Re: Infinite history size" (Dec 14,  7:53pm)
X-Mailer: OpenZMail Classic (0.9.2 24April2005)
To: Zsh users <zsh-users@zsh.org>
Subject: Re: Infinite history size
MIME-version: 1.0
Content-type: text/plain; charset=us-ascii

On Dec 14,  6:48pm, Chris Down wrote:
} 
} In bash, and some other shells, this can be done by nullfying (note: not
} unsetting) HIST{,FILE}SIZE, and then making sure readline's
} "history-size" is -1.

I think what you've found there is a behavior of readline, not especially
a behavior of the shells in question.  Since zsh doesn't use readline, ...

On Dec 14,  7:53pm, Chris Down wrote:
}
} So I'll take the answer as "you can't" (although LONG_MAX is obviously
} not something that I'm going to reach :-) ).

Although setting a very large number is probably the easiest way, you
could do something along these lines:

    SAVEHIST=$(( $(wc -l $HISFILE) * 2 ))
    HISTSIZE=$SAVEHIST
    zshaddhistory() {
      if (( HISTNO == HISTSIZE ));
      then
        (( HISTSIZE *= 2 )) 
	SAVEHIST=$HISTSIZE
      fi
      return 0
    }

I haven't tested that, and obviously it needs some tweaking for cases
where file size actually becomes a significant fraction of LONG_MAX.