| files2 {base} | R Documentation |
These functions provide a low-level interface to the computer's file system.
dir.create(path, showWarnings = TRUE, recursive = FALSE, mode = "0777")
Sys.chmod(paths, mode = "0777")
Sys.umask(mode = "0000")
path |
a character vector containing a single path name. |
paths |
character vectors containing file or directory paths. |
showWarnings |
logical; should the warnings on failure be shown? |
recursive |
logical. Should elements of the path other than the
last be created? If true, like Unix's |
mode |
the file mode to be used on Unix-alikes: it will be
coerced by |
dir.create creates the last element of the path, unless
recursive = TRUE. Trailing path separators are removed.
The mode will be modified by the umask setting in the same way
as for the system function mkdir. What modes can be set is
OS-dependent, and it is unsafe to assume that more than three octal
digits will be used. For more details see your OS's documentation on the
system call mkdir (and not that on the command-line utility of
that name).
Sys.chmod sets the file permissions of one or more files.
It may not be supported (when a warning is issued).
See the comments for dir.create for how modes are interpreted.
Changing mode on a symbolic link is unlikely to work (nor be
necessary). For more details see your OS's documentation on the
system call chmod (and not that on the command-line utility of
that name).
Sys.umask sets the umask.
It may not be supported (when a warning is issued and "0000"
returned). For more details see your OS's documentation on the
system call umask.
dir.create and Sys.chmod return a logical vector
indicating which operation succeeded for each of the files attempted.
Using a missing value for a path name will always be regarded as a
failure. dir.create indicates failure if the dirwctory already
exiss. If showWarnings = TRUE, dir.create will give a
warning for an unexpected failure (e.g. not for a missing value nor
for an already existing component for recursive = TRUE).
Sys.umask returns the previous value of the umask,
invisibly, as a length-one object of class "octmode".
Ross Ihaka, Brian Ripley
file.info, file.exists, file.path,
list.files, unlink,
basename, path.expand.