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Re: ulimit should limit the shell?
- X-seq: zsh-workers 1486
- From: schaefer@xxxxxxxxxxxxxx (Barton E. Schaefer)
- To: Zoltan Hidvegi <hzoli@xxxxxxxxxx>, zsh-workers@xxxxxxxxxxxxxxx (Zsh hacking and development)
- Subject: Re: ulimit should limit the shell?
- Date: Sun, 30 Jun 1996 00:30:21 -0700
- In-reply-to: Zoltan Hidvegi <hzoli@xxxxxxxxxx> "ulimit should limit the shell?" (Jun 29, 5:53pm)
- References: <199606291553.RAA02304@xxxxxxxxxxxxxxxxxxxx>
- Reply-to: schaefer@xxxxxxxxxxxxxx
On Jun 29, 5:53pm, Zoltan Hidvegi wrote:
} Subject: ulimit should limit the shell?
}
} In other shells (bash, ksh93 and pdksh) ulimit affects the shell itself,
} not only child processes. I think zsh ulimit should behave similarily.
} Even after ulimit is changed limit can still be used to set limits which
} affect child processes only.
According to zshbuiltins.1, `ulimit' affects child processes only, but
`limit' affects both zsh and its children. Is this description wrong?
I believe the reason for the zsh behavior is that the zsh `limit' is
derived from csh/tcsh, where `ulimit' does not exist. Why `ulimit' is
not simply a synonym for `limit' I do not know; `ulimit' got put in to
zsh during one of the stretches when I wasn't paying much attention to
the mailing list.
} I enable coredumps by defaults in my .zshrc to catch rare zsh bugs but
} this does not affect login shells so I have no coredumps when zsh crashes
} (fortunately this does not seem to occur recently).
If all you're worried about is having the ability to affect the shell
itself, use `limit' instead of `ulimit'. If you're worried about the
ksh compatibility issue, I don't know of any shell other than zsh that
allows you to set limits for children differently from the limits of
the parent shell; so for all I care, the difference between `ulimit'
and `limit' can go away, or be made available only throug a switch
given to `ulimit'.
--
Bart Schaefer
schaefer@xxxxxxxxxx
http://www.well.com/www/barts
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