Organization: Thought Unlimited. Public service Unix since 1986.
Of_Interest: With 27 years of service to the Unix community.
On Thu, Sep 26, 2013 at 10:05:06PM +0200, Polytropon wrote:
> On Thu, 26 Sep 2013 12:51:32 -0700, Gary Kline wrote:
> > my zsh does a default to 10 or so history with just
> >
> > % h
> >
> > I was trying to remember how to set it to ,, say, 100.
>
> Depending on _typical_ terminal heights (100 lines?), this
> seems to be a bit high. But I assume zsh handles the "h"
> alias similarly to the csh, where an alias is defined
> (system-wide in /etc/csh.cshrc or per user in ~/.cshrc).
> Look for ~/.zshrc (if I remember correctly):
>
> alias h 'history 25'
>
> and change it accordingly. An interactive change is also
> possible (but will only be kept for the current session).
>
> I also assume the zsh has some settings on how many commands
> should be kept in history. The system's /etc/csh.cshrc provides
> the csh's equivalent:
>
> set history = 100
> set savehist = 100
>
> Probably zsh has something similar.
>
FWIW, I just tried:
alias -- h='history 50'
works as it ought; last time I tried, the history quit
after ~10. [?]
>
> > (for as many centuries as ive been using vi [nvi], there are
> > *still* things I never had need to learn. so it turns out that
> > a lot of theses "clever" sh scripts are over my head .... it
> > takes mins -> hours to figure out.
>
> You notice that you're saying that to a programmer whose
> shell scripts are usually overcomplicated, dull, and could
> use lots of optimization? ;-)
>
>
>
> > > % history 20 | awk 'BEGIN {cmds=20} { printf("\t%2d\t%s\n", -(cmds-i),
> > > $0); i++ }' | grep -v "history"
> > >
> > > It might be good to define a better exclusion pattern than just
> > > "history" because that might lead to false-positives. I'd suggest
> > > to rename the variables in the awk script to something unique and
> > > then grep for those instead...
> > >
> > I have grep -v aliased to grv.
>
> If you're using that alias inside another alias, zsh (if it
> acts like csh) will expand it properly. Using such an alias
> in a "one-time entry" (as I'd consider an addition to a
> configuration file) still doesn't sound optimal regarding
> readability and maintainability. As if we would ever maintain
> our "naturally grown" (over centuries) configuration files... ;-)
>
> Still I think turning the example into a shell alias ("h20") or
> assigning it (with 20 -> 10) to the "precmd" alias could not
> be trivial, at least regarding the C shell, because lots of
> quoting and escaping would be needed; maybe zsh does not behave
> like a madman in this regards ("unmatched this, unmatched that,
> sytax error, cannot expand, missing argument, blah ..."). :-)
>
>
>
>
> --
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
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--
Gary Kline kl...@thought.org http://www.thought.org Public Service Unix
Twenty-seven years of service to the Unix community.
http://www.thought.org/HOPE
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