file.info {base} | R Documentation |
Utility function to extract information about files on the user's file systems.
file.info(...)
... |
character vectors containing file paths. |
The file paths are tilde-expanded: see path.expand
.
What is meant by ‘file access’ and hence the last access time is system-dependent.
The file ‘mode’ follows POSIX conventions, giving three octal digits summarizing the permissions for the file owner, the owner's group and for anyone respectively. Each digit is the logical or of read (4), write (2) and execute/search (1) permissions.
File modes are probably only useful on NTFS file systems, and it seems
all three digits refer to the file's owner.
The execute/search bits are set for directories, and for files based
on their extensions (e.g., ‘.exe’, ‘.com’, ‘.cmd’
and ‘.bat’ files). file.access
will give a more
reliable view of read/write access availability to the R process.
A data frame with row names the file names and columns
size |
double: File size in bytes. |
isdir |
logical: Is the file a directory? |
mode |
integer of class "octmode" . The file permissions,
printed in octal, for example 644 . |
mtime, ctime, atime |
integer of class "POSIXct" :
file modification, ‘last status change’ and last access times. |
exe |
character: what sort of executable is this? Possible
values are "no" , "msdos" , "win16" ,
"win32" , "win64" and "unknown" . Note that a
file (e.g. a script file) can be executable according to the mode
bits but not executable in this sense. |
Entries for non-existent or non-readable files will be NA
.
What is meant by the three file times depends on the OS and file
system. On Windows ctime
is the creation time.
files
, file.access
,
list.files
,
and DateTimeClasses
for the date formats.
Sys.chmod
to change permissions.
ncol(finf <- file.info(dir()))# at least six ## Not run: finf # the whole list ## Those that are more than 100 days old : finf[difftime(Sys.time(), finf[,"mtime"], units="days") > 100 , 1:4] file.info("no-such-file-exists")