awk: switching lines and concatenating lines? Post: 302408136

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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

03-28-2010

Registered User

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.

Borghal

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LEARN ABOUT NETBSD

pause

PAUSE(3)						   BSD Library Functions Manual 						  PAUSE(3)

NAME

     pause -- stop until signal

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     int
     pause(void);

DESCRIPTION

     Pause is made obsolete by sigsuspend(2).

     The pause() function forces a process to pause until a signal is received from either the kill(2) function or an interval timer.  (See
     setitimer(2).)  Upon termination of a signal handler started during a pause(), the pause() call will return.

RETURN VALUES

     Always returns -1.

ERRORS

     The pause() function always returns:

     [EINTR]		The call was interrupted.

SEE ALSO

     kill(2), poll(2), select(2), setitimer(2), sigsuspend(2)

STANDARDS

     The pause() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').

HISTORY

     A pause() syscall appeared in Version 6 AT&T UNIX.

BSD
								   June 4, 1993 							       BSD

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