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Full Discussion: How to replace specific text line out of multiple occurance
Top Forums Shell Programming and Scripting How to replace specific text line out of multiple occurance Post 302206292 by radoulov on Tuesday 17th of June 2008 11:57:57 AM
Old 06-17-2008
Quote:
Originally Posted by kahuna
Radoulov,



Could you explain a little more on how the second perl solution works? I can't figure out how the substitute knows which "ExitAction = NONE" to substitute. I see that you're qualifying it with the if statement, but I still don't see how that makes the substitute get right "ExitAction = NONE" and not the first "ExitAction = NONE" .
Sure,
the -00 flag+argument turns the paragraph mode on.
From perldoc perlrun:

Quote:
Switches include:

-0[octal/hexadecimal]
specifies the input record separator ($/) as an octal or hexadeci-
mal number. If there are no digits, the null character is the
separator.
[...]

The special value 00 will cause Perl to slurp files in paragraph
mode. The value 0777 will cause Perl to slurp files whole because
there is no legal byte with that value.
In this mode each record is a paragraph of text terminated by one or more empty lines.
So change the ExitAction only for the record(s)/paragraph(s) that begin with the pattern "Task sipsiproc".
 

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LEARN ABOUT REDHAT

replace

REPLACE(1)						      General Commands Manual							REPLACE(1)

NAME

       replace	-  A utility program that is used by msql2mysql, but that has more general applicability as well. replace changes strings in place
       in files or on the standard input. Uses a finite state machine to match longer strings first. Can be used to swap strings.

USAGE

       replace [-?svIV] from to from to ... -- [files]

       or

       replace [-?svIV] from to from to ... < fromfile > tofile

SYNOPSIS

       replace [-?|-I] [-s] [-v]

DESCRIPTION

       replace

       -?|-I  info

       -s     silent

       -v     verbose

EXTRA INFO

       Special characters in from string:

       ^     Match start of line.

       $     Match end of line.

            Match space-character, start of line or end of line. For a end  the next replace starts locking at the end space-character.  A	
	      alone in a string matches only a space-character.

EXAMPLE

       this command swaps a and b in the given files:

       shell> replace a b b a -- file1 file2 ...

SEE ALSO

       isamchk	(1),  isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror
       (1), replace (1), safe_mysqld (1), which1 (1), zap (1),

AUTHOR

       Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se).	This software  comes  with
       no  warranty.  Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer-
       curmedia.com)

								 20 December 2000							REPLACE(1)
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