Difference between revisions of "Manual:File System Functions"

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{{TOC right}}
 
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== File System Functions ==
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= File System Functions =
 
A collection of functions for interacting with the file system.
 
A collection of functions for interacting with the file system.
  
===io.exists===
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==io.exists==
 
; io.exists()
 
; io.exists()
 
: Checks to see if a given file or folder exists.
 
: Checks to see if a given file or folder exists.
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===lfs.attributes===
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==lfs.attributes==
 
; lfs.attributes(path)
 
; lfs.attributes(path)
 
: Returns a table with detailed information regarding a file or directory, or nil if path is invalid / file or folder does not exist.
 
: Returns a table with detailed information regarding a file or directory, or nil if path is invalid / file or folder does not exist.

Revision as of 23:28, 29 June 2017

File System Functions

A collection of functions for interacting with the file system.

io.exists

io.exists()
Checks to see if a given file or folder exists.
If it exists, it’ll return the Lua true boolean value, otherwise false.
See lfs.attributes() for a cross-platform solution.
Example
-- This example works on Linux only
if io.exists("/home/vadi/Desktop") then
  echo("This folder exists!")
else
  echo("This folder doesn't exist.")
end

-- This example will work on both Windows and Linux.
if io.exists("/home/vadi/Desktop/file.tx") then
  echo("This file exists!")
else
  echo("This file doesn't exist.")
end

lfs.attributes

lfs.attributes(path)
Returns a table with detailed information regarding a file or directory, or nil if path is invalid / file or folder does not exist.
Example
fileInfo = lfs.attributes("/path/to/file_or_directory")
if fileInfo then
    if fileInfo.mode == "directory" then
        echo("Path points to a directory.")
    elseif fileInfo.mode == "file" then
        echo("Path points to a file.")
    else
        echo("Path points to: "..fileInfo.mode)
    end
    display(fileInfo) -- to see the detailed information
else
    echo("The path is invalid (file/directory doesn't exist)")
end