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Re: Find the oldest files without using ls -tr

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>>>>> Stephane Chazelas <stephane_chazelas@yahoo.fr> writes:
>>>>> 2012-03-14 18:31:56 +0000, Sven Mascheck:

[...]

 >> or just "find ... -exec {} +" which is posix and obsoletes xargs

 > ... obsoletes xargs in direct combination with find, not in
 > combination with other commands or with other usage patterns or with
 > things like find ... | grep ... | xargs ...

	Why one may want grep(1) instead of (GNU) find's own -name,
	-regex, etc.?

 > and as far as this thread is concerned:

 > find . -printf '%T+\t%p\0' |
 >   tr '\n\0' '\0\n' |
 >   sort |
 >   head -n 3 |
 >   cut -f2- |
 >   tr '\n\0' '\0\n' |
 >   xargs -r0 ls -ldrt

 > (GNU syntax)

	Please note that both GNU sort and GNU Awk support NUL's as
	record separators.  So, it could be shortened (fork-wise) to:

$ find . -printf '%T+\t%p\0' \
      | sort -z \
      | gawk -vRS=\\0 -vORS=\\0 \
            'NR > 3 { exit; }
             1 { sub(/^[^[:blank:]]*\t/, ""); print $0; }' \
      | xargs -r0 -- ... 

	Also, %T@ could provide a shorter key for sort(1) (with -n) to
	use.

	But still, there's no need to sort the stream as a whole just to
	find the N lowest elements.

-- 
FSF associate member #7257

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Thread

Find the oldest files without using ls -tr Paul Branon <paulbranon@googlemail.com> - 2012-03-13 08:22 -0700
  Re: Find the oldest files without using ls -tr Janis Papanagnou <janis_papanagnou@hotmail.com> - 2012-03-13 18:23 +0100
    Re: Find the oldest files without using ls -tr Ivan Shmakov <oneingray@gmail.com> - 2012-03-14 12:31 +0700
      Re: Find the oldest files without using ls -tr Paul Branon <paulbranon@googlemail.com> - 2012-03-14 08:28 -0700
        Re: Find the oldest files without using ls -tr Ivan Shmakov <oneingray@gmail.com> - 2012-03-14 22:43 +0700
          Re: Find the oldest files without using ls -tr Ben Morrow <ben@morrow.me.uk> - 2012-03-14 18:05 +0000
            Re: Find the oldest files without using ls -tr Sven Mascheck <mascheck@email.invalid> - 2012-03-14 18:31 +0000
              Re: Find the oldest files without using ls -tr Stephane Chazelas <stephane_chazelas@yahoo.fr> - 2012-03-14 19:01 +0000
                Re: Find the oldest files without using ls -tr Ivan Shmakov <oneingray@gmail.com> - 2012-03-15 10:41 +0700
                Re: Find the oldest files without using ls -tr Stephane Chazelas <stephane_chazelas@yahoo.fr> - 2012-03-15 08:13 +0000
                Re: Find the oldest files without using ls -tr Ivan Shmakov <oneingray@gmail.com> - 2012-03-16 10:24 +0700
                Re: Find the oldest files without using ls -tr Sven Mascheck <mascheck@email.invalid> - 2012-03-15 19:54 +0000
              Re: Find the oldest files without using ls -tr Ben Morrow <ben@morrow.me.uk> - 2012-03-14 19:59 +0000
                Re: Find the oldest files without using ls -tr Janis Papanagnou <janis_papanagnou@hotmail.com> - 2012-03-15 00:16 +0100
                Re: Find the oldest files without using ls -tr Ben Morrow <ben@morrow.me.uk> - 2012-03-15 02:12 +0000
                Re: Find the oldest files without using ls -tr Janis Papanagnou <janis_papanagnou@hotmail.com> - 2012-03-15 09:42 +0100
                Re: Find the oldest files without using ls -tr Ben Morrow <ben@morrow.me.uk> - 2012-03-15 10:56 +0000
                Re: Find the oldest files without using ls -tr tmcd@panix.com (Tim McDaniel) - 2012-03-15 15:46 +0000
                Re: Find the oldest files without using ls -tr Ben Morrow <ben@morrow.me.uk> - 2012-03-15 16:49 +0000
                Re: Find the oldest files without using ls -tr tmcd@panix.com (Tim McDaniel) - 2012-03-15 19:06 +0000
                Re: Find the oldest files without using ls -tr Casper H.S. Dik <Casper.Dik@OrSPaMcle.COM> - 2012-03-15 17:13 +0000
  Re: Find the oldest files without using ls -tr Stephane Chazelas <stephane_chazelas@yahoo.fr> - 2012-03-13 17:40 +0000

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