How to find owner of file or folder?

How to find owner of file or folder?

[TJ Luoma]

This is the only way that I know of to get the username who owns a
certain file or folder, such as /usr/local/

          command ls -ld /usr/local | awk '{print $3}'

(or `ls -dn` if you want the number instead of the name)

but that seems fairly inelegant.

Is there a better way?

Re: How to find owner of file or folder?

[Dan Nelson]

In the last episode (Feb 27), TJ Luoma said:
> This is the only way that I know of to get the username who owns a
> certain file or folder, such as /usr/local/
> 
>           command ls -ld /usr/local | awk '{print $3}'
> 
> (or `ls -dn` if you want the number instead of the name)
> 
> but that seems fairly inelegant.
> 
> Is there a better way?

$ zmodload zsh/stat
$ zstat -H fileinfo /usr/local
$ echo $fileinfo[uid]
0
$ ls -ld /usr/local
drwxr-xr-x  42 root  wheel  42 Feb 19 17:05 /usr/local/
$ typeset fileinfo
fileinfo=(atime 1313171206 blksize 4096 blocks 5 ctime 1329692755 device
 4201426224 gid 0 inode 3366 link '' mode 16877 mtime 1329692755 nlink 42
 rdev 4294967295 size 42 uid 0 )

-- 
	Dan Nelson
	dnelson@allantgroup.com

Re: How to find owner of file or folder?

[TJ Luoma]

On Mon, Feb 27, 2012 at 12:31 PM, Dan Nelson <dnelson@allantgroup.com> wrote:
> $ zmodload zsh/stat
> $ zstat -H fileinfo /usr/local
> $ echo $fileinfo[uid]
> 0
> $ ls -ld /usr/local
> drwxr-xr-x  42 root  wheel  42 Feb 19 17:05 /usr/local/
> $ typeset fileinfo
> fileinfo=(atime 1313171206 blksize 4096 blocks 5 ctime 1329692755 device
>  4201426224 gid 0 inode 3366 link '' mode 16877 mtime 1329692755 nlink 42
>  rdev 4294967295 size 42 uid 0 )

Oh cool… I didn't know about $fileinfo either… I actually thought
about doing something along the same lines.

THERE IS SO MUCH ABOUT ZSH I DON'T KNOW! And I've been using it since
1990-something (1995? I think)

Thanks again, and also to Danek Duvall.

TjL

Re: How to find owner of file or folder?

[Dan Nelson]

In the last episode (Feb 27), TJ Luoma said:
> On Mon, Feb 27, 2012 at 12:31 PM, Dan Nelson <dnelson@allantgroup.com> wrote:
> > $ zmodload zsh/stat
> > $ zstat -H fileinfo /usr/local
> > $ echo $fileinfo[uid]
> > 0
> > $ ls -ld /usr/local
> > drwxr-xr-x  42 root  wheel  42 Feb 19 17:05 /usr/local/
> > $ typeset fileinfo
> > fileinfo=(atime 1313171206 blksize 4096 blocks 5 ctime 1329692755 device
> >  4201426224 gid 0 inode 3366 link '' mode 16877 mtime 1329692755 nlink 42
> >  rdev 4294967295 size 42 uid 0 )
> 
> Oh cool... I didn't know about $fileinfo either... I actually thought
> about doing something along the same lines.

Note that "fileinfo" is just an arbitrary variable name I picked.  See the
zshmodules manpage for more info.

-- 
	Dan Nelson
	dnelson@allantgroup.com

Re: How to find owner of file or folder?

[TJ Luoma]

On Mon, Feb 27, 2012 at 1:38 PM, Dan Nelson <dnelson@allantgroup.com> wrote:
> Note that "fileinfo" is just an arbitrary variable name I picked.  See the
> zshmodules manpage for more info.

Ah, I hadn't looked closely enough. Thanks for the clarification!

TjL

Re: How to find owner of file or folder?

[Danek Duvall]

On Mon, Feb 27, 2012 at 11:55:14AM -0500, TJ Luoma wrote:

> This is the only way that I know of to get the username who owns a
> certain file or folder, such as /usr/local/
> 
>           command ls -ld /usr/local | awk '{print $3}'
> 
> (or `ls -dn` if you want the number instead of the name)
> 
> but that seems fairly inelegant.
> 
> Is there a better way?

The stat builtin, from the zsh/stat module (see zshmodules(1).  Or the
similar utility of the same name, part of GNU coreutils.

Danek

Re: How to find owner of file or folder?

[Peter Stephenson]

On Mon, 27 Feb 2012 11:55:14 -0500
TJ Luoma <luomat@gmail.com> wrote:
> This is the only way that I know of to get the username who owns a
> certain file or folder, such as /usr/local/
> 
>           command ls -ld /usr/local | awk '{print $3}'
> 
> (or `ls -dn` if you want the number instead of the name)
> 
> but that seems fairly inelegant.
> 
> Is there a better way?

% zmodload -F zsh/stat b:zstat
% zstat -s +uid /usr/local/bin/zsh
root

-- 
Peter Stephenson <pws@csr.com>            Software Engineer
Tel: +44 (0)1223 692070                   Cambridge Silicon Radio Limited
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Re: How to find owner of file or folder?

[TJ Luoma]

Excellent! I knew there had to be a better way. Thanks, Peter.

Here's a little script I wrote up which will show the owner if just
one argument is given, or will shown the owner and filename if more
than one argument is given:

#!/bin/zsh

zmodload -F zsh/stat b:zstat

# if there's just one argument given, show the owner and exit
if [ "$#" = "1" ]
then
		zstat -s +uid "$@"
		exit
fi		

# otherwise, loop through and shown the owner for each file which exists
for F in $@
do

	[[ -e "$F" ]] || continue

	echo -n "$F: "
	zstat -s +uid "$F"

done