[Rd] restoring LANGUAGE env variable within an R session
I was playing around with the setting of the LANGUAGE variable and am wondering whether I'm missing something obvious about resetting the value to its original state once it's been set. I seem to be able to reset the language for warnings/errors once, but not to change it a second time (or reset it) once it's been set ... ?? ## default (no LANGUAGE set, English locale) > sqrt(-1) [1] NaN Warning message: In sqrt(-1) : NaNs produced ## no complaints, doesn't change (as expected) > Sys.setenv(LANGUAGE = "en") > sqrt(-1) [1] NaN Warning message: In sqrt(-1) : NaNs produced ## change to German > Sys.setenv(LANGUAGE = "de") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## try to change to Spanish - no luck ## (this does work in a clean session) > Sys.setenv(LANGUAGE = "es") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## try resetting to blank > Sys.setenv(LANGUAGE = "") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## or back to English explicitly? > Sys.setenv(LANGUAGE = "en") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt > __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] restoring LANGUAGE env variable within an R session
Ben, POSIX level / glibc level variables are set at process start and AGAIK cannot really be altered after start. They clearly work when set _before_ calling sqrt(-1): $ LANGUAGE=es Rscript -e 'sqrt(-1)' [1] NaN Warning message: In sqrt(-1) : Se han producido NaNs $ LANGUAGE=de Rscript -e 'sqrt(-1)' [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt $ I think the `callr` package can help you with this use from with R by effectively spawning a new process for you. Or, lower-level, you can call `system()` or `system2()` yourself and take care of the setup. Cheers, Dirk -- dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] restoring LANGUAGE env variable within an R session
There is also some inconsistency. Even though sqrt(-1) returns the warning/error about NaNs in German after setting the language to Spanish, if you give the command > messages() it will respond in Spanish. On Mon, Jun 26, 2023 at 4:39 PM Dirk Eddelbuettel wrote: > > > Ben, > > POSIX level / glibc level variables are set at process start and AGAIK cannot > really be altered after start. They clearly work when set _before_ calling > sqrt(-1): > > $ LANGUAGE=es Rscript -e 'sqrt(-1)' > [1] NaN > Warning message: > In sqrt(-1) : Se han producido NaNs > $ LANGUAGE=de Rscript -e 'sqrt(-1)' > [1] NaN > Warnmeldung: > In sqrt(-1) : NaNs wurden erzeugt > $ > > I think the `callr` package can help you with this use from with R by > effectively spawning a new process for you. Or, lower-level, you can call > `system()` or `system2()` yourself and take care of the setup. > > Cheers, Dirk > > -- > dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] restoring LANGUAGE env variable within an R session
That's reasonable, but I'm wondering why it works the *first* time
it's called in a session. Is this just undefined behaviour (so I
shouldn't be surprised whatever happens)? Again,
$ Rscript -e 'sqrt(-1); Sys.setenv(LANGUAGE="es"); sqrt(-1)'
[1] NaN
Warning message:
In sqrt(-1) : NaNs produced
[1] NaN
Warning message:
In sqrt(-1) : Se han producido NaNs
I should clarify that this really isn't that important for my
workflow, it just seemed like an odd loose end.
Weirdly, I just discovered that Sys.setLanguage(). Don't know how it
differs, but there's a bindtextdomain(NULL) call there which may be the
magic sauce ... ???
sqrt(-1)
[1] NaN
Warning message:
In sqrt(-1) : NaNs produced
> Sys.setLanguage("de")
> sqrt(-1)
[1] NaN
Warnmeldung:
In sqrt(-1) : NaNs wurden erzeugt
> Sys.setLanguage("en")
> sqrt(-1)
[1] NaN
Warning message:
In sqrt(-1) : NaNs produced
On 2023-06-26 9:38 a.m., Dirk Eddelbuettel wrote:
Ben,
POSIX level / glibc level variables are set at process start and AGAIK cannot
really be altered after start. They clearly work when set _before_ calling
sqrt(-1):
$ LANGUAGE=es Rscript -e 'sqrt(-1)'
[1] NaN
Warning message:
In sqrt(-1) : Se han producido NaNs
$ LANGUAGE=de Rscript -e 'sqrt(-1)'
[1] NaN
Warnmeldung:
In sqrt(-1) : NaNs wurden erzeugt
$
I think the `callr` package can help you with this use from with R by
effectively spawning a new process for you. Or, lower-level, you can call
`system()` or `system2()` yourself and take care of the setup.
Cheers, Dirk
--
Dr. Benjamin Bolker
Professor, Mathematics & Statistics and Biology, McMaster University
Director, School of Computational Science and Engineering
(Acting) Graduate chair, Mathematics & Statistics
> E-mail is sent at my convenience; I don't expect replies outside of
working hours.
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Re: [Rd] restoring LANGUAGE env variable within an R session
Translated strings are cached. I'd recommend to use the • New partly experimental Sys.setLanguage() utility, solving the main problem of PR#18055. introduced in R 4.2.0. Best, Sebastian Meyer Am 26.06.23 um 15:15 schrieb Ben Bolker: I was playing around with the setting of the LANGUAGE variable and am wondering whether I'm missing something obvious about resetting the value to its original state once it's been set. I seem to be able to reset the language for warnings/errors once, but not to change it a second time (or reset it) once it's been set ... ?? ## default (no LANGUAGE set, English locale) > sqrt(-1) [1] NaN Warning message: In sqrt(-1) : NaNs produced ## no complaints, doesn't change (as expected) > Sys.setenv(LANGUAGE = "en") > sqrt(-1) [1] NaN Warning message: In sqrt(-1) : NaNs produced ## change to German > Sys.setenv(LANGUAGE = "de") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## try to change to Spanish - no luck ## (this does work in a clean session) > Sys.setenv(LANGUAGE = "es") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## try resetting to blank > Sys.setenv(LANGUAGE = "") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## or back to English explicitly? > Sys.setenv(LANGUAGE = "en") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt > __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] restoring LANGUAGE env variable within an R session
Thanks, this is exactly PR#18055. Should have looked (but assumed I was probably just overlooking something ...) On 2023-06-26 10:02 a.m., Sebastian Meyer wrote: Translated strings are cached. I'd recommend to use the • New partly experimental Sys.setLanguage() utility, solving the main problem of PR#18055. introduced in R 4.2.0. Best, Sebastian Meyer Am 26.06.23 um 15:15 schrieb Ben Bolker: I was playing around with the setting of the LANGUAGE variable and am wondering whether I'm missing something obvious about resetting the value to its original state once it's been set. I seem to be able to reset the language for warnings/errors once, but not to change it a second time (or reset it) once it's been set ... ?? ## default (no LANGUAGE set, English locale) > sqrt(-1) [1] NaN Warning message: In sqrt(-1) : NaNs produced ## no complaints, doesn't change (as expected) > Sys.setenv(LANGUAGE = "en") > sqrt(-1) [1] NaN Warning message: In sqrt(-1) : NaNs produced ## change to German > Sys.setenv(LANGUAGE = "de") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## try to change to Spanish - no luck ## (this does work in a clean session) > Sys.setenv(LANGUAGE = "es") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## try resetting to blank > Sys.setenv(LANGUAGE = "") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt ## or back to English explicitly? > Sys.setenv(LANGUAGE = "en") > sqrt(-1) [1] NaN Warnmeldung: In sqrt(-1) : NaNs wurden erzeugt > __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel -- Dr. Benjamin Bolker Professor, Mathematics & Statistics and Biology, McMaster University Director, School of Computational Science and Engineering (Acting) Graduate chair, Mathematics & Statistics > E-mail is sent at my convenience; I don't expect replies outside of working hours. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] dir.exists returns FALSE on Symlink directory
I hope I'm not asking a stupid question... If I symlink a directory, is symlink considered as directory in R? If so, why `dir.exists` returns FALSE on directory? I understand symlink is essentially a file, but functionally a symlink to directory is no different to the directory itself, but a directory is also essentially a file. Is there any way that allow me to check if a symlink is linked to directory in base R, like `dir.exists(..., symlink_ok = TRUE)`? Thanks, Dipterix __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] dir.exists returns FALSE on Symlink directory
В Mon, 26 Jun 2023 10:26:07 -0400
Dipterix Wang пишет:
> If I symlink a directory, is symlink considered as directory in R?
It seems to work, at least on GNU/Linux:
# (on this system, /var/lock is a symbolic link pointing to /run/lock/)
system('ls -l /var/lock')
# lrwxrwxrwx 1 root root <...> /var/lock -> /run/lock
dir.exists('/var/lock')
# [1] TRUE
> If so, why `dir.exists` returns FALSE on directory?
Which operating system? Judging by your User-Agent, it must be some
version of macOS. Can you provide the output of `ls -l` on the symbolic
link?
--
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Ivan
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Re: [Rd] dir.exists returns FALSE on Symlink directory
It sounds like either R as a whole or the R session does not have
permission to view the directory.
*Stephen Dawson, DSL*
/Executive Strategy Consultant/
Business & Technology
+1 (865) 804-3454
http://www.shdawson.com
On 6/26/23 11:07, Ivan Krylov wrote:
В Mon, 26 Jun 2023 10:26:07 -0400
Dipterix Wang пишет:
If I symlink a directory, is symlink considered as directory in R?
It seems to work, at least on GNU/Linux:
# (on this system, /var/lock is a symbolic link pointing to /run/lock/)
system('ls -l /var/lock')
# lrwxrwxrwx 1 root root <...> /var/lock -> /run/lock
dir.exists('/var/lock')
# [1] TRUE
If so, why `dir.exists` returns FALSE on directory?
Which operating system? Judging by your User-Agent, it must be some
version of macOS. Can you provide the output of `ls -l` on the symbolic
link?
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Re: [Rd] dir.exists returns FALSE on Symlink directory
Le 26/06/2023 à 16:26, Dipterix Wang a écrit :
I hope I'm not asking a stupid question...
Many think that there is no such thing as "stupid question". However,
this one looks more appropriate for r-help list, does not it?
If I symlink a directory, is symlink considered as directory in R? If so, why
`dir.exists` returns FALSE on directory?
I understand symlink is essentially a file, but functionally a symlink to
directory is no different to the directory itself, but a directory is also
essentially a file.
Is there any way that allow me to check if a symlink is linked to directory in
base R, like `dir.exists(..., symlink_ok = TRUE)`?
What about :
dir.exists(Sys.readlink("your_link"))
?
Best,
Serguei.
Thanks,
Dipterix
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TBI, INSA/INRAE UMR 792, INSA/CNRS UMR 5504
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31077 Toulouse Cedex 04
tel: +33 5 61 55 98 49
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Re: [Rd] dir.exists returns FALSE on Symlink directory
Le 26/06/2023 à 17:17, Serguei Sokol a écrit :
Le 26/06/2023 à 16:26, Dipterix Wang a écrit :
I hope I'm not asking a stupid question...
Many think that there is no such thing as "stupid question". However,
this one looks more appropriate for r-help list, does not it?
If I symlink a directory, is symlink considered as directory in R?
If so, why `dir.exists` returns FALSE on directory?
I understand symlink is essentially a file, but functionally a
symlink to directory is no different to the directory itself, but a
directory is also essentially a file.
Is there any way that allow me to check if a symlink is linked to
directory in base R, like `dir.exists(..., symlink_ok = TRUE)`?
What about :
dir.exists(Sys.readlink("your_link"))
Or even better:
file_test("-d", "your_real_dir_or_simlink_to_dir")
which returns TRUE for both a real dir and a simlink to a dir.
Best,
Serguei.
?
Best,
Serguei.
Thanks,
Dipterix
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Ingenieur de recherche INRAE
Cellule Mathématiques
TBI, INSA/INRAE UMR 792, INSA/CNRS UMR 5504
135 Avenue de Rangueil
31077 Toulouse Cedex 04
tel: +33 5 61 55 98 49
email: so...@insa-toulouse.fr
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Re: [Rd] dir.exists returns FALSE on Symlink directory
Thanks!
I think Sys.readlink resolved my issue. Indeed I found a permission issue. I
will post my questions to r-help next time.
Best,
Dipterix
> On Jun 26, 2023, at 11:17 AM, Serguei Sokol wrote:
>
> Le 26/06/2023 à 16:26, Dipterix Wang a écrit :
>> I hope I'm not asking a stupid question...
> Many think that there is no such thing as "stupid question". However, this
> one looks more appropriate for r-help list, does not it?
>
>> If I symlink a directory, is symlink considered as directory in R? If so,
>> why `dir.exists` returns FALSE on directory?
>>
>> I understand symlink is essentially a file, but functionally a symlink to
>> directory is no different to the directory itself, but a directory is also
>> essentially a file.
>>
>> Is there any way that allow me to check if a symlink is linked to directory
>> in base R, like `dir.exists(..., symlink_ok = TRUE)`?
> What about :
>
> dir.exists(Sys.readlink("your_link"))
>
> ?
>
> Best,
> Serguei.
>
>>
>> Thanks,
>> Dipterix
>> __
>> R-devel@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>
>
> --
> Serguei Sokol
> Ingenieur de recherche INRAE
>
> Cellule Mathématiques
> TBI, INSA/INRAE UMR 792, INSA/CNRS UMR 5504
> 135 Avenue de Rangueil
> 31077 Toulouse Cedex 04
>
> tel: +33 5 61 55 98 49
> email: so...@insa-toulouse.fr
> https://www.toulouse-biotechnology-institute.fr/en/plateformes-plateaux/cellule-mathematiques/
>
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