get drive names on mac

keszegh · June 2022

i've been using this code on windows to get drive list, but it turns out that it returns false on mac. as i do not have a mac, it is hard to experiment, can somebody help me with a correct code?:

    local disks = {}
    for i = 65, 90 do
      local letter = string.char(i)
      local att = lfs.attributes(letter..":/.")
      if att then local data={} data.name=letter..":" table.insert(disks, data) end
    end
    rootnames=(#disks > 0 and disks)
    return rootnames

hgy29 · June 2022

There are no drive letters on Mac, file system is unified as it is with other Unix like systems. Rott directory is just /

keszegh · June 2022

so if i want a list of 'drives' then i should return a list of whatever is in "/". what would that return usually?

hgy29 · June 2022

Well, not quite, I think the best would be to display mounted drives (not sure how to get that through lfs) and also to provide a few typical locations such as Document folder or user home foldet

keszegh · June 2022

hgy29 said:
Well, not quite, I think the best would be to display mounted drives (not sure how to get that through lfs) and also to provide a few typical locations such as Document folder or user home foldet

that sounds logical, but without having a mac in hand it is hopeless for me though.

hgy29 · June 2022

Thinking of it, I remember having coded something about a getDrives() call in our lfs implementation

keszegh · June 2022

would be nice. i did not find such a thing in the documentation.

hgy29 · June 2022

Found it: the call is lfs.drives(), but it doesn't to fix anything about Mac situation, it just returns "/" here

keszegh · June 2022

hgy29 said:
Found it: the call is lfs.drives(), but it doesn't to fix anything about Mac situation, it just returns "/" here

: )

keszegh · June 2022

finally i can do tests on mac.
what would be the way to access the current user folder through lfs?
i tried

for entry in lfs.dir("~")

but it did not work.

keszegh · June 2022

or how to get the current user name on mac? (from that i could generate the user folder too)

keszegh · June 2022

@hgy29 , let me know if you have any ideas about mac user folder or if i should give up on this. thanks

hgy29 · June 2022

Did you try

print(os.getenv("HOME"))

?
That should work on Linux or Mac.

keszegh · June 2022

hgy29 said:
Did you try
print(os.getenv("HOME"))
?
That should work on Linux or Mac.

works on Mac, great. now how to do this on windows?

keszegh · June 2022

i've found out. for Windows, os.getenv("HOMEDRIVE") and os.getenv("HOMEPATH") do the job.

keszegh · June 2022

another related question. how to find out with lfs if a file or folder is system/hidden (in windows, i don't know if these terms exist on mac)?

keszegh · June 2022

i've added the windows user folder to the folder shortcuts (besides drives) in my app. but when opened, it is filled up with foldernames of type ".something".
what's your opinion, is it safe to hide folders starting with "." anywhere or just in this folder or i should leave it to the user to sort out this mess of a user folder.

rrraptor · June 2022

keszegh said:
i've added the windows user folder to the folder shortcuts (besides drives) in my app. but when opened, it is filled up with foldernames of type ".something".
what's your opinion, is it safe to hide folders starting with "." anywhere or just in this folder or i should leave it to the user to sort out this mess of a user folder.

I think you need to use "flags" in "attributes" table:

https://superuser.com/questions/44812/windows-explorers-file-attribute-column-values

Works on win8+

keszegh · June 2022

thanks @rrraptor , i will check the flags.

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