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Full Discussion: Merging two lines into one (awk)
Top Forums UNIX for Beginners Questions & Answers Merging two lines into one (awk) Post 303039776 by sand1234 on Tuesday 15th of October 2019 08:42:09 AM
Old 10-15-2019
Hi RavinderSingh13,

Thanks for the explanation and solution.

However in this case we need to match on lines which have 80 character length.

I changed your solution to the one below.

However, I just realized that although the code works, the logic is incorrect. If len(line)==80, add newline, else add "". This in fact is the opposite of what we are trying to achieve!

Code:
$ awk '{printf("%s%s",$0~length==80?ORS:"",$0)} END {print ""}' unwrap2.txt

2019 Sep 28 10:47:24.695 hkaet9612 last message repeated 1 time
2019 Sep 28 10:47:24.695 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interface Ethernet1/45 is down (Interface removed)
2019 Sep 28 10:47:24.699 hkaet9612 last message repeated 1 time
2019 Sep 28 10:47:24.699 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interfa
2019 Sep 28 10:47:24.699 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interface Ethernet1/46 is down (Interface removed)
2019 Sep 28 10:47:24.702 hkaet9612 last message repeated 1 time

Further to this point, the matching criteria does not match the 80 character lines we want, and instead matches everything.

Code:
$ awk '$0~length==80' unwrap2.txt
2019 Sep 28 10:47:24.695 hkaet9612 last message repeated 1 time
2019 Sep 28 10:47:24.695 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interfa
2019 Sep 28 10:47:24.699 hkaet9612 last message repeated 1 time
2019 Sep 28 10:47:24.699 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interfa
2019 Sep 28 10:47:24.699 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interfa
2019 Sep 28 10:47:24.702 hkaet9612 last message repeated 1 time

How can I modify the logic of my code to correctly match on 80 char lines and achieve the desired result?

Thanks.

--- Post updated at 12:42 PM ---

Hi RudiC,

Thanks for the explanation. Both of your solutions work well.

I've just updated the sample file, I would like the solution to cater for lines which are meant to be 80 char in length, and do not need to be condensed.

Interestingly enough, the following seems to work, although the logic doesn't make much sense (as explained in my previous post). Perhaps you can shed some light on this?

Code:
awk '{printf("%s%s",$0~length==80?ORS:"",$0)} END {print ""}' unwrap2.txt

2019 Sep 28 10:47:24.695 hkaet9612 last message repeated 1 time
2019 Sep 28 10:47:24.695 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interface Ethernet1/45 is down (Interface removed)
2019 Sep 28 10:47:24.699 hkaet9612 last message repeated 1 time
2019 Sep 28 10:47:24.699 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interfa
2019 Sep 28 10:47:24.699 hkaet9612 %ETHPORT-5-IF_DOWN_INTERFACE_REMOVED: Interface Ethernet1/46 is down (Interface removed)
2019 Sep 28 10:47:24.702 hkaet9612 last message repeated 1 time

Thanks.
 

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LEARN ABOUT FREEBSD

rpm2cpio

rpm2cpio(1)							   User Commands						       rpm2cpio(1)

NAME

       rpm2cpio - convert Red Hat Package (RPM) to cpio archive

SYNOPSIS

       rpm2cpio [file.rpm]

DESCRIPTION

       The  rpm2cpio  utility converts the .rpm file specified as its sole argument to a cpio archive on standard output. (See NOTES.) If no argu-
       ment is given, an rpm stream is read from standard input. In both cases, rpm2cpio will fail and print a usage message if the standard  out-
       put is a terminal. Therefore, the output is usually redirected to a file or piped through the cpio(1) utility.

EXAMPLES

       Example 1: Converting an rpm file

       example% rpm2cpio Device3Dfx-1.1-2.src.rpm | cpio -itv
       CPIO archive found!
       -rw-r--r--   1 root  root    2635 Sep 13 16:39 1998, 3dfx.gif
       -rw-r--r--   1 root  root   11339 Sep 27 16:03 1998, Dev3Dfx.tar.gz
       -rw-r--r--   1 root  root    1387 Sep 27 16:04 1998, Device3Dfx-1.1-2.spec
       31 blocks

       Example 2: Converting from standard input

       example% rpm2cpio < Device3Dfx-1.1-2.src.rpm | cpio -itv
       CPIO archive found!
       -rw-r--r--   1 root  root    2635 Sep 13 16:39 1998, 3dfx.gif
       -rw-r--r--   1 root  root   11339 Sep 27 16:03 1998, Dev3Dfx.tar.gz
       -rw-r--r--   1 root  root    1387 Sep 27 16:04 1998, Device3Dfx-1.1-2.spec
       31 blocks

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWrpm			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cpio(1), attributes(5)

NOTES

       rpm2cpio handles versions 3 and 4 RPMs.

SunOS 5.10							    20 Aug 2001 						       rpm2cpio(1)
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