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Full Discussion: Help required on joining one line above & below to the pattern matched string line.
Top Forums Shell Programming and Scripting Help required on joining one line above & below to the pattern matched string line. Post 302535770 by drl on Friday 1st of July 2011 03:30:32 PM
Old 07-01-2011
Hi.

With common commands in Section 2 of this script:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate extract +-1, combine,

# Section 1, setup, pre-solution.
# Infrastructure details, environment, commands for forum posts. 
# Uncomment export command to run script as external user.
# export PATH="/usr/local/bin:/usr/bin:/bin"
set +o nounset
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe ; pe "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
pe "(Versions displayed with local utility \"version\")"
c=$( ps | grep $$ | awk '{print $NF}' )
version >/dev/null 2>&1 && s=$(_eat $0 $1) || s=""
[ "$c" = "$s" ] && p="$s" || p="$c"
version >/dev/null 2>&1 && version "=o" $p printf specimen grep paste sed
set -o nounset
pe

FILE=${1-data1}

# Display sample of data file, with head & tail as a last resort.
pe " || start [ first:middle:last ]"
specimen $FILE \
|| { pe "(head/tail)"; head -n 5 $FILE; pe " ||"; tail -n 5 $FILE; }
pe " || end"

# Section 2, solution.
pl " Results:"
grep -A1 -B1 'threshold' $FILE |
tee f1 |
grep -v '^--$' |
tee f2 |
paste -d" " - - - |
tee f3 |
sed 's/$/\n/' |
tee t1

# Section 3, post-solution, check results, clean-up, etc.
n1=$(wc -l <expected-output.txt)
n2=$(wc -l < t1)
pl " Comparison of $n2 created lines with $n1 lines of desired results:"
if [ ! -f expected-output.txt -o ! -s expected-output.txt ]
then
  pe " Comparison file \"expected-output.txt\" zero-length or missing."
  exit
fi
if cmp expected-output.txt t1
then
  pe " Passed -- files have same content."
else
  pe " Failed -- files not identical -- detailed comparison follows."
  if diff -B -b expected-output.txt t1
  then
    pe " Passed by ignoring whitespace differences."
  fi
fi

exit 0

producing:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
GNU bash 3.2.39
printf - is a shell builtin [bash]
specimen (local) 1.17
GNU grep 2.5.3
paste (GNU coreutils) 6.10
GNU sed version 4.1.5

 || start [ first:middle:last ]
Edges: 5:0:5 of 32 lines in file "data1"

ABCD DEFG5 42.0.1-63.38.31
KKKK iokl IP Connection Available


   ---


ABCD DEFG5 42.0.1-63.38.31
SLK A pcnbod RCVRY-LINK-CGST: threshold has cleared
SC=01 LLI=pcnbod CLASS=VL
 || end

-----
 Results:
ABCD DEFG5 42.0.1-63.38.31 SLK A FFFFFF REPT-LINK-CGST: threshold level 0 to 1 SC=00 LLI=mmmmm CLASS=SL

ABCD DEFG5 42.0.1-63.38.31 SLK A FFFFFF RCVRY-LINK-CGST: threshold has cleared SC=00 LLI=mmmmm CLASS=SL

ABCD DEFG5 42.0.1-63.38.31 SLK A pcnbod REPT-LINK-CGST: threshold level 0 to 1 SC=01 LLI=pcnbod CLASS=VL

ABCD DEFG5 42.0.1-63.38.31 SLK A pcnbod RCVRY-LINK-CGST: threshold has cleared SC=01 LLI=pcnbod CLASS=VL


-----
 Comparison of 8 created lines with 7 lines of desired results:
cmp: EOF on expected-output.txt
 Failed -- files not identical -- detailed comparison follows.
 Passed by ignoring whitespace differences.

See temporary files f? for intermediate results, man pages for other details ... cheers, drl
 

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LEARN ABOUT OPENSOLARIS

tee

tee(1)								   User Commands							    tee(1)

NAME

       tee - replicate the standard output

SYNOPSIS

   /usr/bin/tee
       /usr/bin/tee [-ai] [file]...

   ksh93
       tee [-ail] [file]...

DESCRIPTION

   /usr/bin/tee
       /usr/bin/tee  copies  standard  input  to standard output, making a copy in zero or more files. tee does not buffer its output. The options
       determine if the specified files are overwritten or appended to.

   ksh93
       The tee built-in in ksh93 is associated with the /bin and /usr/bin paths. It is invoked when tee is executed without a pathname prefix  and
       the pathname search finds a /bin/tee or /usr/bin/tee executable.

       tee  copies  standard input to standard output and to zero or more files. The options determine whether the specified files are overwritten
       or appended to. The tee utility does not buffer output. If a write to a file fails, tee continues to write to other files although it exits
       with a non-zero exit status.

       The number of file operands that can be specified is limited by the underlying operating system.

OPTIONS

   /usr/bin/tee
       The following options are supported by /usr/bin/tee:

       -a    Appends the output to the files rather than overwriting them.

       -i    Ignores interrupts.

   ksh93
       The following options are supported by the tee built-in command in ksh93:

       -a		      Appends the output to the files rather than overwriting them.
       --append

       -i		      Ignores SIGINT signal.
       --ignore-interrupts

       -l		      Sets the standard output to be line buffered.
       --line-buffer

OPERANDS

       The following operands are supported:

       file    A path name of an output file. Processing of at least 13 file operands are supported.

USAGE

       See largefile(5) for the description of the behavior of tee when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

ENVIRONMENT VARIABLES

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

EXIT STATUS

   /usr/bin/tee
       The following exit values are returned by /usr/bin/tee:

       0     The standard input was successfully copied to all output files.

       >0    The number of files that could not be opened or whose status could not be obtained.

   ksh93
       The following exit values are returned by tee in ksh93:

       0     Successful completion.

       >0    An error occurred.

ATTRIBUTES

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

   /usr/bin/tee
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |Standard		     |See standards(5). 	   |
       +-----------------------------+-----------------------------+

   ksh93
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |See below.		   |
       +-----------------------------+-----------------------------+

       The ksh93 built-in binding to /bin and /usr/bin is Volatile. The built-in interfaces are Uncommitted.

SEE ALSO

       cat(1), ksh93(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.11							    20 Nov 2007 							    tee(1)
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