[Rd] .Rhistory created with wrong permissions (PR#13752)

[Paul Gilbert]

Nicolas.Thierry-Mieg at imag.fr wrote:
> Hi,
>
>
> This is with a centos 5.3 x86_64 system, using R 2.8.1 (details below).
>
> In a directory where R is invoked, at the end of a session R offers to 
> "Save workspace image". Replying yes creates/updates at least two files 
> in the current directory: .Rhistory and .RData.
> .Rhistory is created with permissions 0600, therefore it effectively 
> ignores umask. In particular, .Rhistory cannot be group-readable, which 
> can be problematic in some environments.
> This is not the case for .RData (created 0666, modified by umask as 
> usual), so I doubt that the .Rhistory permissions are restrictive by design?
>   
I`m not sure, but it may be by design.  For example, users sometimes use 
passwords to connections, which one might not want accidentally recorded 
in a readable file.

Paul
> If not, it would be better to create .Rhistory 0666 and let the user 
> control the actual permissions through umask.
>
> Regards,
> Nicolas Thierry-Mieg
>
> *****************************
> Steps to reproduce:
>
> [nthierry at tryo ~]$ mkdir ttt
> [nthierry at tryo ~]$ cd ttt
> [nthierry at tryo ttt]$ R
> <snip copyright and greeting message>
>  > y<-3
>  > q()
> Save workspace image? [y/n/c]: y
> [nthierry at tryo ttt]$ ls -la
> total 20
> drwxr-xr-x  2 nthierry timb 4096 Jun 10 16:21 .
> drwxr-x--- 80 nthierry timb 4096 Jun 10 15:18 ..
> -rw-r--r--  1 nthierry timb   61 Jun 10 16:21 .RData
> -rw-------  1 nthierry timb    9 Jun 10 16:21 .Rhistory
> [nthierry at tryo ttt]$
>
>
>
> Using strace on the R process shows the following, which seems to 
> confirm that the problem comes from R itself:
>
> open(".RDataTmp", O_WRONLY|O_CREAT|O_TRUNC, 0666)
> <snip>
> rename(".RDataTmp", ".RData")
> open(".Rhistory", O_WRONLY|O_CREAT|O_TRUNC, 0600)
>
>
>
> *****************************
>  > version
> platform       x86_64-redhat-linux-gnu
> arch           x86_64
> os             linux-gnu
> system         x86_64, linux-gnu
> status
> major          2
> minor          8.1
> year           2008
> month          12
> day            22
> svn rev        47281
> language       R
> version.string R version 2.8.1 (2008-12-22)
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>   
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