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From: Thiago Adams <thiago.adams@gmail.com>
Newsgroups: comp.unix.programmer
Subject: Re: how copy file on linux?
Date: Wed, 26 Jun 2024 21:40:06 -0300
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Em 6/26/2024 8:24 PM, Lew Pitcher escreveu:
> (Followup set to comp.unix.programmer)
> 
> On Wed, 26 Jun 2024 15:35:00 -0700, Keith Thompson wrote:
> 
>> Thiago Adams <thiago.adams@gmail.com> writes:
>>> How to copy a file on linux keeping the original file information?
>>> timestamp etc?
>>>
>>> Or in other words the equivalent of CopyFileA from windows.
>>
>> comp.unix.programmer is likely to give you better answers.  I don't
>> think POSIX defines any functions that copy files.
> 
> No, AFAIK, POSIX doesn't define an "all-in-one" file copy function.
> However, Linux (the OS Thiago asks about) defines a number of them.
> 
>> If I uunderstand correctly, you want to do the equivalent of "cp -p",
> 
> Which /can/ be accomplished with POSIX calls
>    - the standard I/O functions (fopen()/open(), fread()/read(),
>      fwrite()/write(), fclose()/close() ) to copy the file data
>    - stat() to obtain the "original file information", and
>    - utime() to set the copy timestamps,
>    - chmod() to set the copy file permissions
>    - chown() to set the file ownership
> 
> But, perhaps Thiago would be satisfied with just a hardlinked file.
> 
>> but from C rather than from a shell.  You might consider using system(),
>> but that has some drawbacks, and there are probably better ways.
> 
> 

I am using this to create a "deploy" folder with all files necessary to 
run a program. So on windows I am coping dlls and I think it is a good 
idea to keep the original file attributes . (I am not sure if zip files 
keep that.. I need to check)

On linux I may need to copy some files and I think is is a good idea to 
keep the original attributes as well.