Sign in to follow this  
Followers 0
orbs

how to check if a file is writable? (other then actually writing to it)

4 posts in this topic

unfortunate fact: if you FileOpen() a file for read or write, the return code may well be a valid handle even if the file is not readable or writable (no permissions, encrypted, locked, etc.)

in this case, you get an error only when you go on to the actual FileRead/FileWrite operation.

so, i'm testing if a file is actually readable like this:

Func _FileReadable($sFile)
    If FileGetSize($sFile)=0 Then Return True
    Local $hFile = FileOpen($sFile, 16)
    FileRead($hFile, 1)
    Local $nError = @error
    FileClose($hFile)
    Return ($nError = 0)
EndFunc

now i'm trying to determine if a file is writable, but doing it in a similar method - i.e. add a character, and remove it - implies changing the file (timestamp and audit trail), which i'm reluctant about.

can someone suggest a reliable, non-intrusive method to check if a file is writable?

thanks for any hints.

Share this post


Link to post
Share on other sites



orbs,

A quick search found this thread which looks as if it could be what you need. :)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

Share this post


Link to post
Share on other sites

thanks Melba23, that seems to do the trick! i'll put it to use and see how it goes.

Share this post


Link to post
Share on other sites

orbs,

Glad I could help. :)

And the "Search" box is at top-right if you have not yet noticed it. ;)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0