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Top Forums UNIX for Dummies Questions & Answers Redirect produces zero byte file Post 302386090 by AIX_user on Monday 11th of January 2010 09:55:12 AM
Old 01-11-2010
Redirect produces zero byte file

I my shell script I call a program and redirect the output to a file.
mypgm > myoutput.file
Once in a while, the output file is zero byte.
The programmer of mypgm said the program always produce some output.
Is there any situation where a redirect will create a zero byte file even if the program actually output something. I want to be sure before I go back to challenge the programmer.
 

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Mail::SPF::Mod::Redirect(3)				User Contributed Perl Documentation			       Mail::SPF::Mod::Redirect(3)

NAME
Mail::SPF::Mod::Redirect - SPF record "redirect" modifier class DESCRIPTION
An object of class Mail::SPF::Mod::Redirect represents an SPF record modifier of type "redirect". Constructors The following constructors are provided: new(%options): returns Mail::SPF::Mod::Redirect Creates a new SPF record "redirect" modifier object. %options is a list of key/value pairs representing any of the following options: domain_spec See "new" in Mail::SPF::Mod. new_from_string($text, %options): returns Mail::SPF::Mod::Redirect; throws Mail::SPF::ENothingToParse, Mail::SPF::EInvalidMod Creates a new SPF record "redirect" modifier object by parsing the string and any options given. Class methods The following class methods are provided: name: returns string Returns 'redirect'. name_pattern: returns Regexp Returns a regular expression that matches a modifier name of 'redirect'. precedence: returns real Returns a precedence value of 0.8. See "precedence" in Mail::SPF::Mod. Instance methods The following instance methods are provided: params See "params" in Mail::SPF::Mod. domain_spec: returns Mail::SPF::MacroString Returns the "domain-spec" parameter of the modifier. process($server, $request, $result): throws Mail::SPF::Result If no mechanism matched during the evaluation of the current SPF record, performs a recursive SPF check using the given SPF server and request objects and substituting the modifier's target domain name for the request's authority domain. The result of the recursive SPF check is then thrown as the result of the current record's evaluation. However, if the target domain has no acceptable SPF record, a "permerror" result is thrown. See RFC 4408, 6.1, for details. See Mail::SPF::Mod for other supported instance methods. SEE ALSO
Mail::SPF, Mail::SPF::Mod, Mail::SPF::Term, Mail::SPF::Record <http://tools.ietf.org/html/rfc4408> For availability, support, and license information, see the README file included with Mail::SPF. AUTHORS
Julian Mehnle <julian@mehnle.net>, Shevek <cpan@anarres.org> perl v5.16.2 2013-08-25 Mail::SPF::Mod::Redirect(3)
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