From r-deve| @end|ng |rom @ker@t|ng@de  Fri Dec  6 08:04:53 2019
From: r-deve| @end|ng |rom @ker@t|ng@de (Andreas Kersting)
Date: Fri, 06 Dec 2019 08:04:53 +0100 (CET)
Subject: [Rd] Error in close.connection(p) : ignoring SIGPIPE signal
In-Reply-To: <a0461c12-0e5d-104c-5fb4-32631667c9d9@gmail.com>
Message-ID: <E1id7fZ-0000XB-A0@rmmprod05.runbox>

Hi Benjamin,

you cannot pipe to echo, since it does not read from stdin. 

echo just echos is first arg, i.e. echo /dev/stdin > /dev/null will echo the string "/dev/stdin"to /dev/stdout, which is redirected to /dev/null.

Try 

p <- pipe("cat > /dev/null", open = "w")

instead.

Regards,
Andreas

2019-12-06 02:46 GMT+01:00 Benjamin Tyner<btyner at gmail.com>:
> Not sure if this is a bug, so posting here first. If I run:
> ?? cnt <- 0L
> ?? while (TRUE) {
> ? ? ?? cnt <- cnt + 1L
> ? ? ?? p <- pipe("echo /dev/stdin > /dev/null", open = "w")
> ? ? ?? writeLines("foobar", p)
> ? ? ?? tryCatch(close(p), error = function(e) { print(cnt); stop(e)})
> ?? }
> 
> then once cnt gets to around 650, it fails with:
> 
> ?? [1] 654
> ?? Error in close.connection(p) : ignoring SIGPIPE signal
> 
> Should I not be using pipe() in this way? Here is my sessionInfo()
> 
> ?? R version 3.6.0 (2019-04-26)
> ?? Platform: x86_64-pc-linux-gnu (64-bit)
> ?? Running under: Ubuntu 18.04.3 LTS
> 
> ?? Matrix products: default
> ?? BLAS:?? /home/btyner/R360/lib64/R/lib/libRblas.so
> ?? LAPACK: /home/btyner/R360/lib64/R/lib/libRlapack.so
> 
> ?? locale:
> ? ? [1] LC_CTYPE=en_US.UTF-8?????? LC_NUMERIC=C
> ? ? [3] LC_TIME=en_US.UTF-8??????? LC_COLLATE=en_US.UTF-8
> ? ? [5] LC_MONETARY=en_US.UTF-8??? LC_MESSAGES=en_US.UTF-8
> ? ? [7] LC_PAPER=en_US.UTF-8?????? LC_NAME=C
> ? ? [9] LC_ADDRESS=C?????????????? LC_TELEPHONE=C
> ?? [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
> 
> ?? attached base packages:
> ?? [1] stats???? graphics? grDevices utils???? datasets? methods base
> 
> ?? loaded via a namespace (and not attached):
> ?? [1] compiler_3.6.0
> 
> Regards,
> Ben
> 
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> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
> 


[Rd] Error in close.connection(p) : ignoring SIGPIPE signal
Andreas Kersting