That sounds fine! It will be as before in version 2.2.* then? The editor I use is Vim, which says that the file "is read-only", but I can override the protection. Wordpad says that the file is "in use by another application". In notepad it is saved without protests. It's especially when I use the browser() I like to edit and save the file while R has it open. Regards, Vidar -----Original Message----- From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca] Sent: 22. september 2005 02:12 To: Prof Brian Ripley Cc: Hjellvik Vidar; r-help at stat.math.ethz.ch; Uwe Ligges Subject: Re: [R] source(file) => file becomes readonly
Prof Brian Ripley wrote:
This was not really accurate. Being `read-only' is a Windows phenomenon on open files (even files open for reading). In 2.0.1 and 2.1.1 the file was open whilst it was parsed and so `read-only' during that time. In 2.0.1 it was then closed, but in 2.1.1 it was (potentially) opened several times to find an encoding, parsed and left open until source() terminated. In 2.2.0 it will be closed once it has been parsed.
But R doesn't open files in an exclusive mode. It opens them in "share deny none" mode (_SH_DENYNO; this is an undocumented feature of the MSVC run-time library that MinGW uses). I suspect whatever editor Hjellvik was using attempted to open the file with exclusive access, and when that failed (because R had it open), it fell back to read-only access. It's certainly possible to open a file for write access in another process while R has it open for read access. You just can't get exclusive access to it. Duncan Murdoch
Changing a file after it has been parsed will have no effect, so there is no reason to prevent it (beyond that was the simplest way to implement choosing a suitable encoding). On Thu, 1 Sep 2005, Hjellvik Vidar wrote:
The OS is Windows XP. I use to work on the file while it's executed and save changes continually. It doesn't seem to have any effect on the current execution. I just find it annoying not to be able to do it. It's not crucial, but if there is some easy way around it I would like to know.... -----Original Message----- From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de] Sent: 1. september 2005 14:21 To: Hjellvik Vidar Cc: r-help at stat.math.ethz.ch Subject: Re: [R] source(file) => file becomes readonly Hjellvik Vidar wrote:
Hello, when I work in R, I write code in a text file that I run with the "source(filename)" command. In R2.1.1 the file is read-only while the source command is executed. This was not the case in R2.0.1. Is this a bug-fix or is it possible not to have the file read-only when executed?
So you want to modify a file *while* it is executed? Sounds dangerous to me, you may want to explain further... BTW: Which OS are we talking about? Uwe Ligges
Best regards Vidar
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