file.info {base}

R Documentation

Extract File Information

Description

Utility function to extract information about files on the user's file systems.

Usage

file.info(...)

Arguments

...	character vectors containing file names.

Details

What is meant by “file access” and hence the last access time is system-dependent.

On most systems symbolic links are followed, so information is given about the file to which the link points rather than about the link.

Value

A data frame with row names the file names and columns

size	integer: 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, creation and last access times.
uid	integer: the user ID of the file's owner.
gid	integer: the group ID of the file's group.
uname	character: uid interpreted as a user name.
grname	character: gid interpreted as a group name.

Unknown user and group names will be NA.

Entries for non-existent or non-readable files will be NA. The uid

Note

This function will only be operational on systems with the stat system call, but that seems very widely available.

Author(s)

B. D. Ripley

See Also

files, file.access, list.files, and DateTimeClasses for the date formats.

Examples

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")

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