Indeed, when I tried the same on a 64-bit OS I got the usual
(correct) information from file.info(). The size is wrong in R
1.9.1 but that seems to have been fixed in R-devel.
-roger
Prof Brian Ripley wrote:
This is a purely OS issue: your OS has not been set up so the fopen and
stat calls handle > 2Gb files. There is one R issue: the size will
overflow in file.info.
For example, under Solaris 64-bit applications can handle such files
whereas 32-bit ones need calls to stat64, fopen64 etc.
It seems a very exotic need, but if someone wants to find out how to use
the OS-specific ways to extend stat etc and supply patches, please do so.
We don't put OS-specific limitations on help pages.
On Tue, 31 Aug 2004, Roger D. Peng wrote:
I've got a file that's approximately 2.2GB and it seems to be foiling
file.info(). When I run `stat' from the shell I get
zooey:> stat data.csv
File: `data.csv'
Size: 2271197563 Blocks: 4440280 IO Block: 4096 regular file
Device: 342h/834d Inode: 9994308 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 500/ rpeng) Gid: ( 500/ rpeng)
Access: 2004-08-31 09:50:04.000000000 -0400
Modify: 2004-08-26 19:09:42.000000000 -0400
Change: 2004-08-31 09:53:29.000000000 -0400
Take a look at the source code for stat, in coreutils.
But, file.info() in R-devel gives me:
> file.info("data.csv")
size isdir mode mtime ctime atime uid gid uname grname
data.csv NA NA <NA> <NA> <NA> <NA> NA NA <NA> <NA>
I assume this has something to do with the underlying call to `stat'
in `do_fileinfo'.
This alone is not much of a problem but I also can't seem to be able
to open a file connection to the same file. For example,
> con <- file("data.csv")
> open(con, "r")
Error in open.connection(con, "r") : unable to open connection
In addition: Warning message:
cannot open file `data.csv'
Also, interestingly,
> file.exists("data.csv")
[1] FALSE
I take it all these things are related.
Is it possible to fix this within R? Or should there be a note in the
help pages?
> version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status Under development (unstable)
major 2
minor 0.0
year 2004
month 08
day 31
language R
-roger
______________________________________________
[EMAIL PROTECTED] mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
______________________________________________
[EMAIL PROTECTED] mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
