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Full Discussion: sed *\n*
Top Forums Shell Programming and Scripting sed *\n* Post 302312557 by devtakh on Friday 1st of May 2009 11:36:11 PM
Old 05-02-2009
Code:
/identification/{
N
s/identification *\n*and *\n*tracking *\n*system/Identification System/
}

* means 0 or mor occurance of the preceding character.
\n means new line as you know
N - reads the next line and appends it to the existing cotents in the pattern space
- without the *, it must have the space and the \n for sure.

ok..so it says, whereever it finds the word identification, it reads the next line into the pattern space. so it appends the next line to the pattern space ( so your pattern space will have "identification....\n next line "

and then you are trying to substitute identification *\n*and *\n*tracking *\n*system
with Identification System in the pattern space.


cheers,
Devaraj Takhellambam
 

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LEARN ABOUT PLAN9

what

what(1) 							   User Commands							   what(1)

NAME

       what - extract SCCS version information from a file

SYNOPSIS

       what [-s] filename...

DESCRIPTION

       The what utility searches each filename for occurrences of the pattern @(#) that the SCCS get command (see sccs-get(1)) substitutes for the
       %Z% ID keyword, and prints what follows up to a ", >, NEWLINE, , or NULL character.

OPTIONS

       The following option is supported:

       -s	Stops after the first occurrence of the pattern.

EXAMPLES

       Example 1: Extracting SCCS version information

       If a C program in file program.c contains

       char sccsid[] = "@(#)identification information";

       and program.c is compiled to yield program.o and a.out, the command:

       example% what program.c program.o a.out

       produces:

       program.c:      identification information

       program.o:      identification information

       a.out:	       identification information

EXIT STATUS

       The following exit values are returned:

       0	Any matches were found.

       1	No matches found.

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect the execution of what: LANG, LC_ALL,	LC_CTYPE,  LC_MES-
       SAGES, and NLSPATH.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsprot 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sccs(1), sccs-admin(1), sccs-cdc(1), sccs-comb(1), sccs-delta(1), sccs-get(1), sccs-help(1), sccs-prs(1), sccs-prt(1), sccs-rmdel(1), sccs-
       sact(1), sccs-sccsdiff(1),  sccs-unget(1), sccs-val(1), sccsfile(4), attributes(5), environ(5), standards(5)

DIAGNOSTICS

       Use the SCCS help command for explanations (see sccs-help(1)).

BUGS

       There is a remote possibility that a spurious occurrence of the `@(#)' pattern could be found by what.

SunOS 5.10							    30 Sep 2002 							   what(1)
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