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Operating Systems HP-UX find the largest file in whole system Post 302221735 by buffoonix on Tuesday 5th of August 2008 04:53:01 AM
Old 08-05-2008
Yet another slight refinement special for not too dated find commands on HP-UX
(don't know which PHCO_* patch this was, search HPs' online patch database)
would be to use the plus instead of the trailing semicolon with find commands.
Then it would rather behave like piped to xargs for the exec-ed command
which improves performance and thus decreases waiting time.
e.g. looking for file exceeding 2GB (which would require largefiles support)
Code:
# find / -type f -size +4194304 -exec ll {} +

Here is the excerpt from find's manpage regarding the -exec and + speciality
Code:
      -exec cmd                True if the executed cmd returns a zero value
                               as exit status.  The end of cmd must be
                               punctuated by a semicolon (;) or a plus sign
                               (+) (semicolon and plus are special to the
                               shell and must be escaped).  When + is used,
                               cmd aggregates a set of path names and
                               executes on the set.  Any command arguments
                               between the first occurrence of {} and + are
                               ignored.  The reason for preferring + to a ;
                               is vastly improved performance.  Any command
                               argument {} is replaced by the current path
                               name.  cmd may contain supplementary code set
                               characters.

 

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File::Find::Rule::Procedural(3pm)			User Contributed Perl Documentation			 File::Find::Rule::Procedural(3pm)

NAME
File::Find::Rule::Procedural - File::Find::Rule's procedural interface SYNOPSIS
use File::Find::Rule; # find all .pm files, procedurally my @files = find(file => name => '*.pm', in => @INC); DESCRIPTION
In addition to the regular object-oriented interface, File::Find::Rule provides two subroutines for you to use. "find( @clauses )" "rule( @clauses )" "find" and "rule" can be used to invoke any methods available to the OO version. "rule" is a synonym for "find" Passing more than one value to a clause is done with an anonymous array: my $finder = find( name => [ '*.mp3', '*.ogg' ] ); "find" and "rule" both return a File::Find::Rule instance, unless one of the arguments is "in", in which case it returns a list of things that match the rule. my @files = find( name => [ '*.mp3', '*.ogg' ], in => $ENV{HOME} ); Please note that "in" will be the last clause evaluated, and so this code will search for mp3s regardless of size. my @files = find( name => '*.mp3', in => $ENV{HOME}, size => '<2k' ); ^ | Clause processing stopped here ------/ It is also possible to invert a single rule by prefixing it with "!" like so: # large files that aren't videos my @files = find( file => '!name' => [ '*.avi', '*.mov' ], size => '>20M', in => $ENV{HOME} ); AUTHOR
Richard Clamp <richardc@unixbeard.net> COPYRIGHT
Copyright (C) 2003 Richard Clamp. All Rights Reserved. This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
File::Find::Rule perl v5.12.4 2011-09-19 File::Find::Rule::Procedural(3pm)
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