On Fri, 24 Apr 2009, Mike Miller wrote:
I am running bash, but system calls go to sh. I want to be able to put
that input string ("0005") into a variable and do something like this:
system( "i=`cat /dev/stdin` ; run_script > file${i}.out" ,
input=sprintf("%04d", i) )
In sh, both of these commands execute ls:
echo ls | `cat /dev/stdin`
echo ls | `cat -`
In R, both of these simply hang until I hit ctrl-c...
system( "`cat /dev/stdin`", input="ls" )
system( "`cat -`", input="ls" )
...but the stdin is getting to the command because both of these return
"ls" to stdout:
system( "cat -", input="ls" )
system( "cat /dev/stdin", input="ls" )
So what am I missing? I don't understand why the backtick method isn't
working. Is there another way to do this?
Mike
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