| Line 25... |
Line 25... |
| 25 |
|
25 |
|
| 26 |
The file \sQuote{mode} follows POSIX conventions, giving three octal
|
26 |
The file \sQuote{mode} follows POSIX conventions, giving three octal
|
| 27 |
digits summarizing the permissions for the file owner, the owner's
|
27 |
digits summarizing the permissions for the file owner, the owner's
|
| 28 |
group and for anyone respectively. Each digit is the logical
|
28 |
group and for anyone respectively. Each digit is the logical
|
| 29 |
\emph{or} of read (4), write (2) and execute/search (1) permissions.
|
29 |
\emph{or} of read (4), write (2) and execute/search (1) permissions.
|
| 30 |
|
30 |
|
| 31 |
#ifdef unix
|
31 |
#ifdef unix
|
| 32 |
On most systems symbolic links are followed, so information is given
|
32 |
On most systems symbolic links are followed, so information is given
|
| 33 |
about the file to which the link points rather than about the link.
|
33 |
about the file to which the link points rather than about the link.
|
| 34 |
#endif
|
34 |
#endif
|
| 35 |
#ifdef windows
|
35 |
#ifdef windows
|
| Line 37... |
Line 37... |
| 37 |
all three digits refer to the file's owner.
|
37 |
all three digits refer to the file's owner.
|
| 38 |
The execute/search bits are set for directories, and for files based
|
38 |
The execute/search bits are set for directories, and for files based
|
| 39 |
on their extensions (e.g., \file{.exe}, \file{.com}, \file{.cmd}
|
39 |
on their extensions (e.g., \file{.exe}, \file{.com}, \file{.cmd}
|
| 40 |
and \file{.bat} files). \code{\link{file.access}} will give a more
|
40 |
and \file{.bat} files). \code{\link{file.access}} will give a more
|
| 41 |
reliable view of read/write access availability to the \R process.
|
41 |
reliable view of read/write access availability to the \R process.
|
| 42 |
|
42 |
|
| 43 |
UTF-8-encoded file names not valid in the current locale can be used.
|
43 |
UTF-8-encoded file names not valid in the current locale can be used.
|
| 44 |
|
44 |
|
| 45 |
Junction points and symbolic links are followed, so information is
|
45 |
Junction points and symbolic links are followed, so information is
|
| 46 |
given about the file/directory to which the link points rather than
|
46 |
given about the file/directory to which the link points rather than
|
| 47 |
about the link.
|
47 |
about the link.
|
| 48 |
#endif
|
48 |
#endif
|
| 49 |
}
|
49 |
}
|
| Line 80... |
Line 80... |
| 80 |
What is meant by the three file times depends on the OS and file
|
80 |
What is meant by the three file times depends on the OS and file
|
| 81 |
system. On Windows native file systems \code{ctime} is the file
|
81 |
system. On Windows native file systems \code{ctime} is the file
|
| 82 |
creation time (something which is not recorded on most Unix-alike file
|
82 |
creation time (something which is not recorded on most Unix-alike file
|
| 83 |
systems). What is meant by \sQuote{file access} and hence the
|
83 |
systems). What is meant by \sQuote{file access} and hence the
|
| 84 |
\sQuote{last access time} is system-dependent.
|
84 |
\sQuote{last access time} is system-dependent.
|
| 85 |
|
85 |
|
| 86 |
The times are reported to an accuracy of seconds, and perhaps more on
|
86 |
The times are reported to an accuracy of seconds, and perhaps more on
|
| 87 |
some systems. However, many file systems only record times in
|
87 |
some systems. However, many file systems only record times in
|
| 88 |
seconds, and some (e.g. modification time on FAT systems) are recorded
|
88 |
seconds, and some (e.g. modification time on FAT systems) are recorded
|
| 89 |
in increments of 2 or more seconds.
|
89 |
in increments of 2 or more seconds.
|
| 90 |
}
|
90 |
}
|
| Line 100... |
Line 100... |
| 100 |
\seealso{
|
100 |
\seealso{
|
| 101 |
\code{\link{Sys.readlink}} to find out about symbolic links,
|
101 |
\code{\link{Sys.readlink}} to find out about symbolic links,
|
| 102 |
\code{\link{files}}, \code{\link{file.access}},
|
102 |
\code{\link{files}}, \code{\link{file.access}},
|
| 103 |
\code{\link{list.files}},
|
103 |
\code{\link{list.files}},
|
| 104 |
and \code{\link{DateTimeClasses}} for the date formats.
|
104 |
and \code{\link{DateTimeClasses}} for the date formats.
|
| 105 |
|
105 |
|
| 106 |
\code{\link{Sys.chmod}} to change permissions.
|
106 |
\code{\link{Sys.chmod}} to change permissions.
|
| 107 |
}
|
107 |
}
|
| 108 |
\examples{
|
108 |
\examples{
|
| 109 |
ncol(finf <- file.info(dir())) # at least six
|
109 |
ncol(finf <- file.info(dir())) # at least six
|
| 110 |
\dontrun{finf # the whole list}
|
110 |
\dontrun{finf # the whole list}
|
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