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Get/set Unix file 'owner'?
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Topic: Get/set Unix file 'owner'? (Read 4375 times)
AlexTP
Hero Member
Posts: 2401
Get/set Unix file 'owner'?
«
on:
June 17, 2021, 09:12:07 pm »
CudaText runs 'pkexec /bin/cp old_filename new_filename'.
It works OK but the owner of that file changes from 'root' to my name.
Can I change the owner of a file?
Can I read the owner of a file?
«
Last Edit: June 17, 2021, 09:22:23 pm by Alextp
»
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winni
Hero Member
Posts: 3197
Re: Get/set Unix file 'owner'?
«
Reply #1 on:
June 17, 2021, 09:37:41 pm »
Hi!
The unit
BaseUnix
has a wapper for the Unix command
chown
:
Code: Pascal
[Select]
[+]
[-]
Function
FpChown
(
const
path
:
RawByteString
;
owner
:
TUid
;
group
:
TGid
)
:
cInt
;
Winni
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AlexTP
Hero Member
Posts: 2401
Re: Get/set Unix file 'owner'?
«
Reply #2 on:
June 17, 2021, 10:00:02 pm »
To run the 'pkexec --user username' I need the string-user-name of file owner. How to get it?
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skalogryz
Global Moderator
Hero Member
Posts: 2770
Re: Get/set Unix file 'owner'?
«
Reply #3 on:
June 17, 2021, 10:08:13 pm »
don't you need elevated rights (sudo) to assign "root" as the owner?
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winni
Hero Member
Posts: 3197
Re: Get/set Unix file 'owner'?
«
Reply #4 on:
June 17, 2021, 10:08:42 pm »
Hi
Use the Unix command
id
:
To get the UserID:
Code: Bash
[Select]
[+]
[-]
id
-u
winni
To get the GroupId:
Code: Bash
[Select]
[+]
[-]
id
-g
winni
Winni
Logged
winni
Hero Member
Posts: 3197
Re: Get/set Unix file 'owner'?
«
Reply #5 on:
June 17, 2021, 10:10:14 pm »
Quote from: skalogryz on June 17, 2021, 10:08:13 pm
don't you need elevated rights (sudo) to assign "root" as the owner?
Yes
Winni
Logged
winni
Hero Member
Posts: 3197
Re: Get/set Unix file 'owner'?
«
Reply #6 on:
June 17, 2021, 10:36:43 pm »
Hi!
Oops - you need it vice versa.
For UserId 1000 you use:
Code: Bash
[Select]
[+]
[-]
grep
-
w
1000
/
etc
/
passwd
It returns in my case:
Code: Text
[Select]
[+]
[-]
winni:x:1000:100::/home/winni:/bin/bash
which is:
Code: Text
[Select]
[+]
[-]
UserName:pwd:UserID:GroupID:comment:HomeDirectory:shell
Winni
«
Last Edit: June 17, 2021, 10:41:29 pm by winni
»
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AlexTP
Hero Member
Posts: 2401
Re: Get/set Unix file 'owner'?
«
Reply #7 on:
June 17, 2021, 11:21:28 pm »
Thanks.
I found that 'pkexec /bin/mv' does NOT set root owner. But 'pkexec /bin/cp filename /etc/filename' does it! Solved.
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