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Full Discussion: Verify the header and trailer in file
Top Forums Shell Programming and Scripting Verify the header and trailer in file Post 302748361 by Yoda on Tuesday 25th of December 2012 11:54:54 AM
Old 12-25-2012
Code:
awk -v L=$( wc -l < filename ) 'NR==1{
 header_p=sprintf "%s", substr($0,1,2);
 header=sprintf "%s", substr($0,3,22);
 } NR==L {
 trailer_p=sprintf "%s", substr($0,1,2);
 trailer=sprintf "%s", substr($0,3,22);
 trailer_L=sprintf "%s", substr($0,25,8);
 TL=sprintf "%08i", (L-2);
 if((header_p=="HH") && (trailer_p=="TT") && (header==trailer) && (trailer_L==TL))
  print "Validation Successful."
 else
  print "Validation Failed."
} ' filename

 

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LEARN ABOUT CENTOS

perl::critic::policy::builtinfunctions::prohibitlvaluesubstr

Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSuUser(Contributed Perl DocumPerl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3)

NAME

       Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr - Use 4-argument "substr" instead of writing "substr($foo, 2, 6) = $bar".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Conway discourages the use of "substr()" as an lvalue, instead recommending that the 4-argument version of "substr()" be used instead.

	   substr($something, 1, 2) = $newvalue;     # not ok
	   substr($something, 1, 2, $newvalue);      # ok

       The four-argument form of "substr()" was introduced in Perl 5.005.  This policy does not report violations on code which explicitly
       specifies an earlier version of Perl (e.g. "use 5.004;").

CONFIGURATION

       This Policy is not configurable except for the standard options.

SEE ALSO

       "substr" in perlfunc (or "perldoc -f substr").

       "4th argument to substr" in perl5005delta

AUTHOR

       Graham TerMarsch <graham@howlingfrog.com>

COPYRIGHT

       Copyright (c) 2005-2011 Graham TerMarsch.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2014-06-09	   Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3)
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