Re^2: [Cygwin] Setting and getting file permissions as octal numbers

I do find that execute permissions are automatically set for new files from a non-cygwin source copied to somewhere under /cygdrive/

That's the type of problem I'm trying to avoid - the programmatic alterations are being made on a copy of the original file and then moved back.
Prior to reading your post, I had not realized that it was the move rather than the "programmatic alterations" that was the source of the trouble.

I'm finding that even copying a file (using the Windows clipboard) from /home/me/someplace to /home/me/elsewhere will set the execution bits on the copy.
It's probably a case of just avoiding moving the file, by editing the file in place. (That seems to work ok, but I'll still be setting the perms to their original value anyway.)

A rarer case is that I have also had execution bits mysteriously vanish. I haven't really found out how that happens, so I'll be guarding against that, too.

Should I also be paying attention to the perms settings of the files that make up my perl module source distros on CPAN ?
Those files inside the source tarballs all originate from a Cygwin environment, and the ones that I have just checked have their execution bits set.
Should I be concerned about that ? (No-one has ever complained about the perms settings of the files in my perl modules.)

Cheers,
Rob

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Re^3: [Cygwin] Setting and getting file permissions as octal numbers by kcott (Archbishop) on Sep 04, 2022 at 08:42 UTC
Firstly, see the update to my post. Hopefully, the originally incorrect `/cygdrive/` (now changed to `/cygdrive/c/cygwin64`) didn't mislead you; my apologies if it did. It seems our mode of operating differs somewhat; for instance, I don't believe I've ever used Windows clipboard to copy a file. I rarely use File Explorer for anything; ironically, the most common use is to update Cygwin (for the current `3.3.5` version: `C:\Users\ken\local\opt\cygwin\3_3_5\setup-x86_64.exe`). I use a Cygwin CLI to create files: "`cp old new`", "`vim new`" and "`> new`" would be the most common for individual files; "`module-starter --module=New::Module`" creates a directory structure for a new module — none of these creates files with inappropriate permissions. I checked through all of my (Perl v5.36) `@INC` directories. The core modules were installed using `perlbrew`; all CPAN modules were installed using the cpan utility (two exceptions; "cpan: Terminal does not support AddHistory." has details); all personal modules were installed with a standard "`make install`". All `.pm` files had `444` permissions (except for one black sheep, `Tcl.pm`, which had `555` — I've no idea what happened there). I found an old Strawberry Perl `v5.26.3` installation; I don't recall details of setting this up. All `.pm` files in `lib` and `vendor/lib` had `444` permissions with owner `ken`; all in `site/lib` had `555` with owner `Administrators`. That's about all the info I could think of that was relevant. I'm happy to share more if you think it will be useful; just ask. Bear in mind how our different ways of working may affect outcomes. "No-one has ever complained about the perms settings of the files in my perl modules." I'm really no expert in this area; take the following as (potentially ill-informed) opinion. If no one has ever complained, there's probably no urgency to "fix" what's not broken. I see you have "25 distributions uploaded to CPAN". Perhaps change the permissions in one distro as a test; look at working on the others as updates are made. — Ken	[reply] [d/l] [select]
Re^4: [Cygwin] Setting and getting file permissions as octal numbers by syphilis (Archbishop) on Sep 04, 2022 at 13:38 UTC
Perhaps change the permissions in one distro as a test;look at working on the others as updates are made Yes - I think that's the approach to take. Thanks for the feedback. Cheers, Rob	[reply]