Editing Find (Unix) (section)

==POSIX protection from infinite output==
Real-world file systems often contain looped structures created through the use of [[hard link|hard]] or [[symbolic link|soft links]]. The [[POSIX|POSIX standard]] requires that
{{Blockquote|
The <code>find</code> utility shall detect infinite loops; that is, entering a previously visited directory that is an ancestor of the last file encountered. When it detects an infinite loop, <code>find</code> shall write a diagnostic message to standard error and shall either recover its position in the hierarchy or terminate.
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