Re: portable way of locating an executable (like which)

Path	csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!dedekind.zen.co.uk!zen.net.uk!hamilton.zen.co.uk!reader01.nrc01.news.zen.net.uk.POSTED!not-for-mail
From	Nobody <nobody@nowhere.com>
Subject	Re: portable way of locating an executable (like which)
Date	Fri, 21 Sep 2012 00:59:53 +0100
User-Agent	Pan/0.14.2 (This is not a psychotic episode. It's a cleansing moment of clarity.)
Message-Id	<pan.2012.09.20.23.59.52.522000@nowhere.com>
Newsgroups	comp.lang.python
References	<mailman.973.1348175220.27098.python-list@python.org>
MIME-Version	1.0
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	8bit
Lines	21
Organization	Zen Internet
NNTP-Posting-Host	3f40277c.news.zen.co.uk
X-Trace	DXC=MSc<i^c6kGm1PHEoBToc[da0UP_O8AJol=dR0\ckLKG`WeZ<[7LZNRf1<`:M]jF@HbM2Z^cWRFGAkf>I6hkWndVi
X-Complaints-To	abuse@zen.co.uk
Xref	csiph.com comp.lang.python:29588

Show key headers only | View raw

On Thu, 20 Sep 2012 23:06:46 +0200, Gelonida N wrote:

> I'd like to implement the equivalent functionality of the unix command
> /usr/bin/which
> 
> The function should work under Linux and under windows.

Note that "which" attempts to emulate the behaviour of execvp() etc. The
exec(3) manpage will explain the precise algorithm used (e.g. they skip
files for which the process lacks execute permission).

Also, note that the shell has built-in commands, functions, and aliases in
addition to programs. The "type" built-in command performs a similar
function to "which" but using the shell's semantics. On some systems,
the default configuration may alias "which" to "type".

On Windows, there's a host of different "execute program" interface, all
with subtly different semantics: which extensions they will run, which
extensions can be omitted, which paths are used (e.g. %PATH%, paths
from the registry, current directory).

Thread

portable way of locating an executable (like which) Gelonida N <gelonida@gmail.com> - 2012-09-20 23:06 +0200
  Re: portable way of locating an executable (like which) Nobody <nobody@nowhere.com> - 2012-09-21 00:59 +0100
    Re: portable way of locating an executable (like which) Tarek Ziadé <tarek@ziade.org> - 2012-09-21 10:12 +0200
  Re: portable way of locating an executable (like which) Ramchandra Apte <maniandram01@gmail.com> - 2012-09-22 20:55 -0700
  Re: portable way of locating an executable (like which) Ramchandra Apte <maniandram01@gmail.com> - 2012-09-22 20:55 -0700

csiph-web