Hi Alex!
On 2/22/22 11:20, Alex Sassmannshausen wrote:
Hi Zelphir,
I think you want to be using the popen / pipe procedures for this. See
https://www.gnu.org/software/guile/docs/docs-2.2/guile-ref/Pipes.html
for the chapter in the manual.
Hope this helps :)
Alex
Zelphir Kaltstahl <zelphirkaltst...@posteo.de> writes:
Corrections below.
On 2/22/22 10:29, Zelphir Kaltstahl 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)
So far I have found
~~~~
(system ...)
~~~~
which I tried to use with
~~~~
scheme@(guile-user)> (with-output-to-string
(system "ls -al"))
;; lots of output immediately shown and not stored in variable
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Wrong type to apply: 0
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]> ,bt
In ice-9/ports.scm:
476:4 2 (with-output-to-string 0)
While executing meta-command:
In procedure frame-local-ref: Argument 2 out of range: 1
~~~~
But this does not give me a string back.
I also tried with
~~~~
scheme@(guile-user)> (call-with-values (lambda () (system "ls -al"))
... (lambda (exit-code output) output))
;; lots of output immediately shown
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Wrong number of values returned to continuation (expected 2)
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]> ,bt
In current input:
10:29 1 (_)
In ice-9/boot-9.scm:
1685:16 0 (raise-exception _ #:continuable? _)
~~~~
Is there another function I should be using?
I would like to have the exit code and the output of a command.
Best regards,
Zelphir
Of course I should use `with-output-to-string` correctly:
~~~~
scheme@(guile-user)> (with-output-to-string
(lambda () (system "ls -al")))
;; directly outputted stuff
$1 = ""
~~~~
But still not a win.
Regards,
Zelphir
Thanks for that!
Regards,
Zelphir
--
repositories: https://notabug.org/ZelphirKaltstahl
