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From: Olivier Dion via General Guile related discussions <guile-user@gnu.org>
To: Zelphir Kaltstahl <zelphirkaltstahl@posteo.de>,
	Guile User <guile-user@gnu.org>
Subject: Re: Shell commands with output to string
Date: Tue, 22 Feb 2022 09:27:57 -0500	[thread overview]
Message-ID: <87o82z5636.fsf@laura> (raw)
In-Reply-To: <e6859100-a234-37b9-c677-3e72f36f0578@posteo.de>

On Tue, 22 Feb 2022, Zelphir Kaltstahl <zelphirkaltstahl@posteo.de> wrote:
> Hello Guile users!
>
> How would I run a shell command from inside Guile and get its output
> as a string, instead of the output being outputted directly? (Guile
> 3.0.8)

I use the following:

(define-module (shell utils)
  #:use-module (ice-9 format)
  #:use-module (ice-9 popen)
  #:use-module (ice-9 textual-ports))

(define (shell% proc fmt . args)
  (let* ((port (open-input-pipe (format #f "~?" fmt args)))
         (output (proc port)))
    (close-pipe port)
    output))

(define-public (shell . args)
  (apply shell% (cons get-string-all args)))

(define-public (shell$ . args)
  (apply shell% (cons get-line args)))

Then
(shell "ls" "-l")

The $ variant is to get a single line in the output.

-- 
Olivier Dion
Polymtl



  parent reply	other threads:[~2022-02-22 14:27 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-22  9:29 Shell commands with output to string Zelphir Kaltstahl
2022-02-22  9:38 ` Zelphir Kaltstahl
2022-02-22 10:20   ` Alex Sassmannshausen
2022-02-22 10:43     ` post
2022-02-23 14:01       ` Josselin Poiret
2022-03-08 23:12         ` Zelphir Kaltstahl
2022-03-09 14:14           ` Josselin Poiret
2022-02-22 11:20     ` Neil Jerram
2022-02-23  1:28       ` Zelphir Kaltstahl
2022-02-23  1:29     ` Zelphir Kaltstahl
2022-02-22 10:21   ` tomas
2022-02-22 14:27 ` Olivier Dion via General Guile related discussions [this message]
2022-02-22 16:00   ` Leo Butler
2022-02-22 16:33     ` Olivier Dion via General Guile related discussions
2022-02-23  1:26       ` Zelphir Kaltstahl
2022-02-23 14:13         ` Olivier Dion via General Guile related discussions
2022-02-26  0:32           ` Zelphir Kaltstahl
  -- strict thread matches above, loose matches on Subject: below --
2022-02-23 17:48 Blake Shaw
2022-02-23 18:25 ` Olivier Dion via General Guile related discussions

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