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Full Discussion: sed to replace a line with multi lines from a var
Top Forums Shell Programming and Scripting sed to replace a line with multi lines from a var Post 302703059 by alister on Wednesday 19th of September 2012 09:56:54 AM
Old 09-19-2012
Quote:
Originally Posted by rdrtx1
Code:
 
sed '/Replace_Flag/r myfile' /pathto/test.file | sed '/Replace_Flag/d'

That's a much better solution than the original approach which is vulnerable to delimiters, backslash escape sequences, and ampersands in the replacement text. However, it suffers its own shortcoming: If the flag occurs in the replacement text, some (if not all) of the replacement text will be deleted.

Granted, that scenario is likely to be uncommon and it wasn't mentioned in the original problem statement, but since the fix is painless and also makes the solution more efficient, it seems like a good idea.
Code:
sed '/^FLAG$/{r myfile
d;}' /pathto/test.file

Regards,
Alister
Last edited by alister; 09-19-2012 at 12:10 PM.. Reason: The original sample data implies that the flag is the only text on the line, so anchor it.
This User Gave Thanks to alister For This Post:
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LEARN ABOUT OPENSOLARIS

replace

replace(1)							  MySQL database							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), mysql(1), mysqlaccess(1), mysqladmin(1), mysqld(1), mysqld_multi(1), mysqld_safe(1), mysqldump(1), mysql_fix_privi-
       lege_tables(1), mysqlshow(1), mysql_zap(1), perror(1),

       For more information please refer to the MySQL reference manual, which may already be installed locally and which is also available  online
       at http://www.mysql.com/doc/en/

BUGS

       Please refer to http://bugs.mysql.com/ to report bugs.

AUTHOR

       Ver  1.0,  distribution	4.0.24	Michael (Monty) Widenius (monty@mysql.com), MySQL AB (http://www.mysql.com/).  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.mercur-
       media.com)

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+------------------------------------+
       |  ATTRIBUTE TYPE    |	       ATTRIBUTE VALUE		 |
       +--------------------+------------------------------------+
       |Availability	    | SUNWmysqlr, SUNWmysqlu, SUNWmysqlt |
       +--------------------+------------------------------------+
       |Interface Stability | External				 |
       +--------------------+------------------------------------+
NOTES

       Source for mysql is available on http://opensolaris.org.

MySQL 4.0							 19 December 2000							replace(1)
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