04-06-2012
well if the file doesn't exist return code of grep will non 0 and so it will if file exists but your pattern doesn't exist in file. Meaning the return code of grep -iqw P_BUS_DATE $COMMON_TMP/DateFile.txt 2>/dev/null will be 0 only if file exist and pattern is found in file.
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LEARN ABOUT OSX
ppi::statement::unknown
PPI::Statement::Unknown(3) User Contributed Perl Documentation PPI::Statement::Unknown(3)
NAME
PPI::Statement::Unknown - An unknown or transient statement
INHERITANCE
PPI::Statement::Unknown
isa PPI::Statement
isa PPI::Node
isa PPI::Element
DESCRIPTION
The "PPI::Statement::Unknown" class is used primarily during the lexing process to hold elements that are known to be statement, but for
which the exact "type" of statement is as yet unknown, and requires further tokens in order to resolve the correct type.
They should not exist in a fully parse valid document, and if any exists they indicate either a problem in Document, or possibly (by
allowing it to get through unresolved) a bug in PPI::Lexer.
METHODS
"PPI::Statement::Unknown" has no additional methods beyond the default ones provided by PPI::Statement, PPI::Node and PPI::Element.
SUPPORT
See the support section in the main module.
AUTHOR
Adam Kennedy <adamk@cpan.org>
COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the LICENSE file included with this module.
perl v5.16.2 2011-02-25 PPI::Statement::Unknown(3)