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Hardcoding & Record counts in a file

 
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Top Forums UNIX for Dummies Questions & Answers Hardcoding & Record counts in a file
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Old 08-22-2011
This is probably a case of semantics getting in the way, so I'll clarify what I meant.

Obviously ed would have to read the file into memory and then write out the new data, but all of this is done without creating a new file. The file is modified, so it may be considered new in the sense that the content has changed, but it is not new according to the file system layer (the inode has not changed, only timestamps).

If the file system were out of inodes, no new files could be created and sed -i and similar approaches would fail; ed would work (assuming, of course, sufficient memory).

Regards,
Alister
 
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LEARN ABOUT MOJAVE

mail::spf::v2::record5.18

Mail::SPF::v2::Record(3)				User Contributed Perl Documentation				  Mail::SPF::v2::Record(3)

NAME

       Mail::SPF::v2::Record - Sender ID ("spf2.0") record class

SYNOPSIS

       See Mail::SPF::Record.

DESCRIPTION

       An object of class Mail::SPF::v2::Record represents a Sender ID ("spf2.0") record.

   Constructors
       The following constructors are provided:

       new(%options): returns Mail::SPF::v2::Record
	   Creates a new Sender ID ("spf2.0") record object.

	   %options is a list of key/value pairs representing any of the following options:

	   text
	   terms
	   global_mods
	       See "new" in Mail::SPF::Record.

	   scopes
	       Required.  See "new" in Mail::SPF::Record.  The 'mfrom' and 'pra' scopes are supported.	There is no default.

       new_from_string($text, %options): returns Mail::SPF::v2::Record; throws Mail::SPF::ENothingToParse, Mail::SPF::EInvalidRecordVersion,
       Mail::SPF::ESyntaxError
	   Creates a new Sender ID ("spf2.0") record object by parsing the string and any options given.

   Class methods
       The following class methods are provided:

       version_tag_pattern: returns Regexp
	   Returns a regular expression that matches a version tag of 'spf2.0/' plus a comma-separated list of any of the 'mfrom' and 'pra'
	   scopes.  The following are valid version tags:

	       spf2.0/mfrom
	       spf2.0/pra
	       spf2.0/mfrom,pra
	       spf2.0/pra,mfrom

       default_qualifier
       results_by_qualifier
	   See "Class methods" in Mail::SPF::Record.

   Instance methods
       The following instance methods are provided:

       text
       scopes
       terms
       global_mods
       global_mod
       stringify
       eval
	   See "Instance methods" in Mail::SPF::Record.

       version_tag: returns string
	   Returns 'spf2.0/' plus a comma-separated list of the scopes of the record.  See "version_tag_pattern" for a list of possible return
	   values.

SEE ALSO

       Mail::SPF, Mail::SPF::Record, Mail::SPF::Term, Mail::SPF::Mech, Mail::SPF::Mod

       <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 v5.18.2							    2017-10-06						  Mail::SPF::v2::Record(3)