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Full Discussion: awk: switching lines and concatenating lines?
Top Forums Shell Programming and Scripting awk: switching lines and concatenating lines? Post 302408136 by Borghal on Sunday 28th of March 2010 09:08:54 AM
Old 03-28-2010
Data awk: switching lines and concatenating lines?
Hello, I have only recently begun with awk and need to write this:
I have an input consisting of a couple of letters, a space and a number followed by various other characters:

fiRcQ 9( [various data ])
klsRo 9( [various data ]) pause
fiRcQ 9( [various data ]) pause
klsRo continue 1
aPLnJ 62( [various data ])
fiRcQ continue 5
... and so on

I want an output where each pause would be followed by a continue with the same key identifier:

fiRcQ 9( [various data ])
klsRo 9( [various data ]) pause klsRo continue 1
fiRcQ 9( [various data ]) pause fiRcQ continue 5
aPLnJ 62( [various data ])

So the algorithm would be something along the lines of:

Code:
start on line = 1
search for "pause" [else increase line by 1 and repeat]
 next line, search for "continue" [else move to next line]
  compare \^[a-zA-Z]*\ from starting line with the same regexp on the current line [else move to next line]
    in case of match, take current line, add it to starting line and delete current line
    increase line by 1 and repeat.

I know what I want to do, but being a total newbie in awk, I have no idea how the syntax would look like.
 

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LEARN ABOUT OPENSOLARIS

pause

pause(2)							   System Calls 							  pause(2)

NAME

       pause - suspend process until signal

SYNOPSIS

       #include <unistd.h>

       int pause(void);

DESCRIPTION

       The  pause()  function  suspends  the  calling  process	until it receives a signal. The signal must be one that is not currently set to be
       ignored by the calling process.

       If the signal causes termination of the calling process, pause() does not return.

       If the signal is caught by the calling process and control is returned from the signal-catching	function  (see	signal(3C)),  the  calling
       process resumes execution from the point of suspension.

RETURN VALUES

       Since  pause()  suspends thread	execution indefinitely unless interrupted by a signal, there is no successful completion return value.	If
       interrupted, it returns -1 and sets errno to indicate the error.

ERRORS

       The pause() function will fail if:

       EINTR	A signal is caught by the calling process and control is returned from the signal-catching function.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       alarm(2), kill(2), signal(3C), wait(3C), attributes(5), standards(5)

SunOS 5.11							    28 Dec 1996 							  pause(2)
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