4 ms·

I think the best "defensive" piece of advice you left out that everyone abuses is never pipe `find` results to `xargs.` One should always do `find ... -print0`

I think the best "defensive" piece of advice you left out that everyone abuses is never pipe `find` results to `xargs.` One should always do `find ... -print0` to a read-while loop because of filenames with whitespace.

Gnouc 11y ago
And you also want to prevent `while` loop in shell script. See http://unix.stackexchange.com/q/169716/38906 http://unix.stackexchange.com/q/169716/38906 for more details.
elevation 11y ago
`xargs -0' was designed to properly handle the output of `find -print0' -- no while loop needed. `find -print0 | xargs -0 grep some_pattern'
_ZeD_ 11y ago
avoid read-while loop... there are problems with filenames starting/ending with spaces... better use find ... -print0 | xargs -0 ... [eventually with -n1]
- Gnouc 11y ago
  And you need non-standard feature `-print0` and `xargs -0` there. Better way should be `find ... -exec cmd {} +`.
  - potatosareok2 11y ago
    Is there a place you can use `-exec cmd {} +` but not `print0`? My experience has been I can use both or I can use none (Solaris 10 boxes).
    - dumol 11y ago
      Systems with a non-GNU find, including the default one in Solaris 10 (I've just double-checked). Perhaps you were using the GNU find in Solaris? By the way, there are systems where 'print0' is a recognized parameter for the default find, but not '+'. RHEL 4.x comes to mind.
      - potatosareok2 11y ago
        Sorry I think we're saying same thing. On systems with non-GNU find do either `-exec cmd {} +` or `print0` work? My exp was both did NOT work. So either both work or both don't. But if I understand you correctly on RHEL 4.X `print0` works but `-exec cmd {} +` doesn't. Which is to say I disagree with op that it's better to rely on `exec cmd {} +` when it seems you're more likely to have `print0 and xargs -0` then that.
lisivka 11y ago
Use "find ... -exec command '{}' '+'" instead of "find | xargs command".

Gnouc 11y ago

And you also want to prevent `while` loop in shell script. See http://unix.stackexchange.com/q/169716/38906 http://unix.stackexchange.com/q/169716/38906 for more details.

elevation 11y ago

`xargs -0' was designed to properly handle the output of `find -print0' -- no while loop needed. `find -print0 | xargs -0 grep some_pattern'

_ZeD_ 11y ago

avoid read-while loop... there are problems with filenames starting/ending with spaces... better use find ... -print0 | xargs -0 ... [eventually with -n1]

Gnouc 11y ago
And you need non-standard feature `-print0` and `xargs -0` there. Better way should be `find ... -exec cmd {} +`.
- potatosareok2 11y ago
  Is there a place you can use `-exec cmd {} +` but not `print0`? My experience has been I can use both or I can use none (Solaris 10 boxes).
  - dumol 11y ago
    Systems with a non-GNU find, including the default one in Solaris 10 (I've just double-checked). Perhaps you were using the GNU find in Solaris? By the way, there are systems where 'print0' is a recognized parameter for the default find, but not '+'. RHEL 4.x comes to mind.
    - potatosareok2 11y ago
      Sorry I think we're saying same thing. On systems with non-GNU find do either `-exec cmd {} +` or `print0` work? My exp was both did NOT work. So either both work or both don't. But if I understand you correctly on RHEL 4.X `print0` works but `-exec cmd {} +` doesn't. Which is to say I disagree with op that it's better to rely on `exec cmd {} +` when it seems you're more likely to have `print0 and xargs -0` then that.

lisivka 11y ago

Use "find ... -exec command '{}' '+'" instead of "find | xargs command".