From: Nemeth Ervin <airwin@inf.bme.hu>
To: Vincent Lefevre <vincent@vinc17.org>
Cc: zsh-users@sunsite.auc.dk
Subject: Re: tcsh -X behavior
Date: 13 Oct 2000 18:08:25 +0200 [thread overview]
Message-ID: <gmv7l7c4tc6.fsf@kempelen.iit.bme.hu> (raw)
In-Reply-To: Vincent Lefevre's message of "Fri, 13 Oct 2000 17:29:56 +0200"
Vincent Lefevre <vincent@vinc17.org> writes:
> Could we have the tcsh -X behavior in zsh conditional expressions?
>
> The tcsh manual says:
>
> X Executable in the path or shell builtin, e.g. ` - X
> ls' and ` - X ls - F' are generally true, but `-X
> /bin/ls' is not (+)
You want probably the hash builtin:
hash [ -dfmr ] [ name[=value] ] ...
[snip...]
value. For each name with no corresponding value,
search for name in the path, and add it to the command
hash table, and associating it with the discovered
path, if it is found.
So in a shell-script:
if hash ls 2> /dev/null; then
:
fi
--
Ervin
"Intelligenti pauca."
next prev parent reply other threads:[~2000-10-13 16:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-13 15:29 Vincent Lefevre
2000-10-13 16:08 ` Nemeth Ervin [this message]
2000-10-13 21:23 ` Vincent Lefevre
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