Change File Attributes On the Fly

[jalbao]

It's been a while since I used ColdFusion - I have forgotten many concepts

How, if possible, can I script ColdFusion to change the file
attributes (MODE) of a specific file located in CF Server's root directory(running on Linux)?

For example:
I have a file named "myfile.txt" located in the /var/chroot/html/ web root directory. The "myfile.txt" only has "Read" rights. Now, in my CF app, I want a user to be able to Delete the "myfile.txt" file (i.e.<cffile action="delete"....>. However, CF will fail on the execution
of the <cffile action="delete"...> tag since the file doesn't have "Write" rights.

Ideally, prior to deleting a file, I would like to check it's attributes. If the file does not have 'Write" rights, then I would like to change the rights (file attributes) of the file to "777" (rwx). Is this possible? If so, how?

By the way, it's nice to see a lot of the familiar names that are still making this forum tick! - Can you believe we're getting close to 10 years on this forum!

 

[GUJUm0deL]

See if this works:

First take the file and do a cffile action="write" -
<cffile action="write" file="myfile.txt" mode=777>

Then, do a cffile action="delete" -
<cffile action = "delete" file="myfile.txt">

Now the file should be deletable cause you chnaged the mode.

This is untested, so let us know if this works.


____________________________________
Just Imagine.

http://www.imajinarts.com

 

[Sarky78]

I'm not on a linix system here so there may be a little tweeking to do but this works for me:

<cfset myFile = ExpandPath('./files.cfm')>
<cfset fileObj = createObject("java", "java.io.File")>

<cfset fileObj = createObject("java", "java.io.File").init(myFile)>

<cfif NOT fileObj.canWrite()>
	<cffile action="copy" source="#myFile#" destination="#expandPath('./mynewfile.cfm')#" mode="777">
</cfif>

The deleting part you're still gonna have a problem with as the user won't have the permissions, so maybe take the suggestion from above and combine the two.

Hope this helps!

Tony

 

[jalbao]

I attempted to do the "Write" action, but I received the following error messages:

"An error occurred when performing a file operation WRITE on file.

The cause of this exception was: java.io.FileNotFoundException: /var/chroot/home/html/literature2.txt (Permission denied)."

I have a feeling that there is no solution to my problem.

The bummer is, I'm on a shared Linux server and the way that my host has the server setup is to NOT have child directories/files inherit the permissions of their parent. Which implies that I can't just set the permissions of the directory that stores all my literature files and have those files inherit the permissions (777).