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Im looking for a way inside a bash script to return the owner of a file. I'm guessing that this is possible using "gawk" but I've honestly got no clue and there doesn't seem to be a comprehensible answer already posted online.

5

Use stat for that.

In a GNU system:

  • To get the username of the owner:

    stat -c '%U' file.txt
    
  • To get the user ID (UID) of the owner:

    stat -c '%u' file.txt
    

Assuming the file is file.txt.


For FreeBSD and Mac OS X (thanks to @cas):

  • For username:

    stat -f '%Su' file.txt
    
  • For UID:

    stat -f '%u' file.txt
    
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    That's correct for GNU stat. For FreeBSD (and Mac OS X) stat, use stat -f '%u' file.txt for UID and stat -f '%Su' file.txt for user name. it's a real shame that GNU and *BSD stat haven't standardised on how to specify custom output formats. – cas Apr 6 '16 at 3:31
  • @cas Thanks.. i have added that to the answer.. – heemayl Apr 6 '16 at 3:34
  • @heemayl Thank you, that perfectly answered my question. I used stat -c '%U' . YNWA! – Abul Hussan Apr 6 '16 at 3:53
  • @AbulHussan Great !! YNWA :) – heemayl Apr 6 '16 at 3:54
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ls -l foo

Field #3 is owner, #4 is group. So:

set -- $(ls -l foo) ; echo $3

But stat is better, when available.

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