08-26-2008
A suffiently big file, not very well.
Unless you did it in C - and use the rewrite command. This will work only if the new data is the same size as the old.
Perhaps a C class would be the way to go.
Quote:
Originally Posted by
prassu
Can it be done without using a new_file ?
I mean updating the same file is that possible?
Please Advice
Thanks
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LEARN ABOUT DEBIAN
carp::datum::strip
Datum::Strip(3pm) User Contributed Perl Documentation Datum::Strip(3pm)
NAME
Carp::Datum::Strip - strips most Carp::Datum calls lexically
SYNOPSIS
use Carp::Datum::Strip qw(datum_strip);
datum_strip("-", "-");
datum_strip($file, "$file.new", ".bak");
DESCRIPTION
This module exports a single routine, datum_strip(), whose purpose is to remove calls to "Carp::Datum" routines lexically.
Because stripping is done lexically, there are some restrictions about what is actually supported. Unless the conventions documented in
Carp::Datum are followed, stripping will be incorrect.
The general guidelines are:
o Do not use here documents or generalized quotes (qq) within assertion expression or tags. Write assertions using '' or "", as
appropriate.
o Assertions can be safely put on several lines, but must end with a semi-colon, outside any string.
There are two calls that will never be stripped: VERIFY() and DTRACE(). The VERIFY() is meant to be preserved (or "DREQUIRE" would have
been used). "DTRACE", when called, will be remapped dynamically to some "Log::Agent" routine, depending on the trace level. See
Carp::Datum for details.
INTERFACE
The interface of the datum_strip() routine is:
"datum_strip" old_file, new_file, [ext]
The old_file specifies the old file path, the one to be stripped. The stripped version will be written to new_file.
If the optional third argument ext is given (e.g. ".bak"), then old_file will be renamed with the supplied extension, and new_file will
be renamed old_file. Renaming only occurs if stripping was successful (i.e. the new file was correctly written to disk).
The lowest nine "rwx" mode bits from old_file are preserved when creating new_file.
Both old_file and new_file can be set to "-", in which case STDIN and STDOUT are used, respectively, and no renaming can occur, nor any
mode bit propagation.
Returns true on success, "undef" on error.
AUTHORS
Christophe Dehaudt and Raphael Manfredi are the original authors.
Send bug reports, hints, tips, suggestions to Dave Hoover at <squirrel@cpan.org>.
SEE ALSO
Carp::Datum(3).
perl v5.10.0 2006-04-13 Datum::Strip(3pm)