From: Alex Vong <alexvong1995@gmail.com>
To: "Thompson\, David" <dthompson2@worcester.edu>
Cc: Guile User <guile-user@gnu.org>, Chris Marusich <cmmarusich@gmail.com>
Subject: Re: How to get the preferred environment variable path separator?
Date: Mon, 28 Mar 2016 21:46:15 +0800 [thread overview]
Message-ID: <87shzalnq0.fsf@gmail.com> (raw)
In-Reply-To: <CAJ=RwfbiqqLpO6_09j1CG2N4gK6Xkf6JyN1LnfsiV7VGKMSLBg@mail.gmail.com> (David Thompson's message of "Mon, 28 Mar 2016 08:20:24 -0400")
"Thompson, David" <dthompson2@worcester.edu> writes:
> On Mon, Mar 28, 2016 at 6:00 AM, Alex Vong <alexvong1995@gmail.com> wrote:
>> Hi,
>>
>> Chris Marusich <cmmarusich@gmail.com> writes:
>>
>>> Hi,
>>>
>>> Info node "(guile) File System" describes a procedure for getting the
>>> preferred file name separator of the operating system:
>>>
>>> -- Scheme Variable: file-name-separator-string
>>> The preferred file name separator.
>>>
>>> Note that on MinGW builds for Windows, both ‘/’ and ‘\’ are valid
>>> separators. Thus, programs should not assume that
>>> ‘file-name-separator-string’ is the _only_ file name
>>> separator—e.g., when extracting the components of a file name.
>>>
>>>
>>> Is there an equivalent procedure for getting the preferred environment
>>> variable path separator, too? I would expect such a procedure to return
>>> the ":" string (or does it return a character?) on most GNU/Linux
>>> distributions, since that is the separator e.g. for the PATH environment
>>> variable.
>>>
>> I can't find one either. If the machine has perl/python, you could try
>> (use-modules (ice-9 rdelim) (ice-9 popen))
>> (read-line (open-pipe* OPEN_READ
>> "perl"
>> "-e"
>> "use Config; print $Config{path_sep}"))
>> or
>> (use-modules (ice-9 rdelim) (ice-9 popen))
>> (read-line (open-pipe* OPEN_READ
>> "python"
>> "-c"
>> "import os; print(os.pathsep)"))
>
> Please don't do this. Use file-name-separator-string. Section 7.2.3
> in the manual, titled "File System". In Emacs, you can press 'i' to
> search the manual for identifiers.
>
> Another way of finding out things like this is to use the REPL:
>
> scheme@(guile-user)> ,a separator
> (guile): file-name-separator-string
> (guile): file-name-separator? #<procedure file-name-separator? (c)>
> scheme@(guile-user)> file-name-separator-string
> $2 = "/"
>
I think Christ is asking for ":" instead of "/", do we have environment
path separator in Guile?
>
> - Dave
next prev parent reply other threads:[~2016-03-28 13:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-28 0:42 How to get the preferred environment variable path separator? Chris Marusich
2016-03-28 10:00 ` Alex Vong
2016-03-28 12:20 ` Thompson, David
2016-03-28 13:46 ` Alex Vong [this message]
2016-03-28 14:24 ` Thompson, David
2016-03-28 15:36 ` Paul Smith
2016-03-28 15:36 ` Eli Zaretskii
2016-03-28 15:40 ` Thompson, David
2016-03-29 7:53 ` tomas
2016-03-31 4:38 ` Chris Marusich
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