chmod fails

Umdurman has asked for the wisdom of the Perl Monks concerning the following question:

Dear friends, I have a nasty problem. I am running a webserver on OSX. The images for the webserver are produced on a Windows machine. The Windows machine has a network connection with the OSX Server. Once the images are ready we drag and drop them from the PC into the image directory on the Mac. If I look in the info of the transferred files I see the owner is the same as the server but everyone is "no access". The image files fail to render in the webserver. I figured to make a nice script that chmods the transferred files and copy them in the right directory. Chmodding however does not work at all. I used to do this file preparing from one Mac to the other, the Server without this problem. Anyone with bright idears? Thanks in advance! No special code, just : chmod 755, $file_name or die "Can't chmod $old because: $!\n"; Please see this link to illustrate the problem: https://apple.stackexchange.com/questions/316205/no-write-permissions-after-copy-files-from-windows Ton

Comment on chmod fails

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Re: chmod fails by hippo (Archbishop) on Aug 14, 2020 at 22:46 UTC
`chmod 755, $file_name or die "Can't chmod $old because: $!\n";` That's not octal. 🦛	[reply] [d/l]
Re^2: chmod fails by wazat (Monk) on Aug 14, 2020 at 23:06 UTC
To futher hippo's reply 755 decimal is 1353 octal. In UNIX terms this corresponds to t-wxrw--wx. As you can see the owner won't have read permission.	[reply]
Re^2: chmod fails by Umdurman (Acolyte) on Aug 15, 2020 at 09:14 UTC
Sorry, forgot the leading 0, that I use it in all my code, 0777 for instance	[reply]
Re: chmod fails by Your Mother (Archbishop) on Aug 15, 2020 at 02:38 UTC
To futher wazat’s reply to hippo’s reply… You can write bare octal numbers in perl with a leading zero. `perldoc chmod` has some examples. `moo@cow[18]~>touch bingo moo@cow[19]~>ls -laF bingo -rw-rw-r-- 1 moo staff 0 Aug 14 22:31 bingo moo@cow[20]~>perl -E 'chmod 0624, "bingo"' moo@cow[21]~>ls -laF bingo -rw--w-r-- 1 apv staff 0 Aug 14 22:31 bingo moo@cow[22]~>perl -E 'say 0755; printf "%o\n", 493' 493 755` [download]	[reply] [d/l] [select]
Re: chmod fails by stevieb (Canon) on Aug 14, 2020 at 20:39 UTC
Post the code you have that doesn't work so we have something to review. We're not going to write something for you without you showing the attempt(s) that you've made.	[reply]
Re^2: chmod fails by Umdurman (Acolyte) on Aug 16, 2020 at 21:08 UTC
Thank you guys, this problem is not about how to chmod but how to make sure to get permissions right when copying files from Windows to Mac directories. I found the solution though. Made a multi-file upload script to transfer the files. Then all permissions will stay okay;-) The script also distributes the uploaded files in one of the 20 special directories for me. After checking if the files are valid;-) Ton	[reply]