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Full Discussion: grep string & a few lines after
Top Forums Shell Programming and Scripting grep string & a few lines after Post 302247902 by arunrao_oradba on Thursday 16th of October 2008 03:34:55 PM
Old 10-16-2008
sed does not work through shell script
hi gurus,
I am trying to use sed to get certain line after a requested line.
the sed works if i run manually but if i put it through shell it does not work.

Any help will be greatly appreciated.

$ cat bt.ksh
ttt=`sed -n '/LAST_UPDATED_DATE/,$p' extractedmessage.out|head -2|tail -1`

cat testing.cfg|while read extractdata
do
whattext=`echo $extractdata|awk -F"||" {'print $1'}`
howmanylines=`echo $extractdata|awk -F"||" {'print $2'}`
echo $whattext $howmanylines

sed -n '/${whattext}/,$p' extractedmessage.out|head -${howmanylines}|tail -1 >bt.out
echo $tttt
done

< ibmrxcpi-rptdb1 : nwp1 : oracle : /users/oracle/arao >
$ cat testing.cfg
LAST_UPDATED_DATE||2
LAST_UPDATED_BY||2
< ibmrxcpi-rptdb1 : nwp1 : oracle : /users/oracle/arao >
$ cat extractedmessage.out
object: RXP_PATIENT
is tag null: Y
command_type: UPDATE
old(1): PATIENT_ID
3380910
old(2): CREATED_DATE
20-JAN-99
old(3): CREATED_BY
RXP_DM_P001
old(4): LAST_UPDATED_DATE
06-APR-08
old(5): LAST_UPDATED_BY
RXP_DM_P012
< ibmrxcpi-rptdb1 : nwp1 : oracle : /users/oracle/arao >
$ ksh -x bt.ksh
+ + sed -n /LAST_UPDATED_DATE/,$p extractedmessage.out
+ head -2
+ tail -1
ttt=06-APR-08
+ cat testing.cfg
+ read extractdata
+ + echo LAST_UPDATED_DATE||2
+ awk -F|| {print $1}
whattext=LAST_UPDATED_DATE
+ + echo LAST_UPDATED_DATE||2
+ awk -F|| {print $2}
howmanylines=2
+ echo LAST_UPDATED_DATE 2
LAST_UPDATED_DATE 2
+ sed -n /${whattext}/,$p extractedmessage.out
+ head -2
+ tail -1
+ 1> bt.out
+ echo

+ read extractdata
+ + echo LAST_UPDATED_BY||2
+ awk -F|| {print $1}
whattext=LAST_UPDATED_BY
+ + echo LAST_UPDATED_BY||2
+ awk -F|| {print $2}
howmanylines=2
+ echo LAST_UPDATED_BY 2
LAST_UPDATED_BY 2
+ sed -n /${whattext}/,$p extractedmessage.out
+ head -2
+ tail -1
+ 1> bt.out
+ echo

+ read extractdata
< ibmrxcpi-rptdb1 : nwp1 : oracle : /users/oracle/arao >
 

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LEARN ABOUT FREEBSD

ddb

DDB(8)							    BSD System Manager's Manual 						    DDB(8)

NAME

     ddb -- configure DDB kernel debugger properties

SYNOPSIS

     ddb capture [-M -core] [-N -system] print
     ddb capture [-M -core] [-N -system] status
     ddb script scriptname
     ddb script scriptname=script
     ddb scripts
     ddb unscript scriptname
     ddb pathname

DESCRIPTION

     The ddb utility configures certain aspects of the ddb(4) kernel debugger from user space that are not configured at compile-time or easily
     via sysctl(8) MIB entries.

     To ease configuration, commands can be put in a file which is processed using ddb as shown in the last synopsis line.  An absolute pathname
     must be used.  The file will be read line by line and applied as arguments to the ddb utility.  Whitespace at the beginning of lines will be
     ignored as will lines where the first non-whitespace character is '#'.

OUTPUT CAPTURE

     The ddb utility can be used to extract the contents of the ddb(4) output capture buffer of the current live kernel, or from the crash dump of
     a kernel on disk.	The following debugger commands are available from the command line:

     capture [-M core] [-N system] print
	     Print the current contents of the ddb(4) output capture buffer.

     capture [-M core] [-N system] status
	     Print the current status of the ddb(4) output capture buffer.

SCRIPTING

     The ddb utility can be used to configure aspects of ddb(4) scripting from user space; scripting support is described in more detail in
     ddb(4).  Each of the debugger commands is available from the command line:

     script scriptname
	     Print the script named scriptname.

     script scriptname=script
	     Define a script named scriptname.	As many scripts contain characters interpreted in special ways by the shell, it is advisable to
	     enclose script in quotes.

     scripts
	     List currently defined scripts.

     unscript scriptname
	     Delete the script named scriptname.

EXIT STATUS

     The ddb utility exits 0 on success, and >0 if an error occurs.

EXAMPLES

     The following example defines a script that will execute when the kernel debugger is entered as a result of a break signal:

	   ddb script kdb.enter.break="show pcpu; bt"

     The following example will delete the script:

	   ddb unscript kdb.enter.break

     For further examples, see the ddb(4) and textdump(4) manual pages.

SEE ALSO

     ddb(4), textdump(4), sysctl(8)

HISTORY

     The ddb utility first appeared in FreeBSD 7.1.

AUTHORS

     Robert N M Watson

BUGS

     Ideally, ddb would not exist, as all pertinent aspects of ddb(4) could be configured directly via sysctl(8).

BSD
								 December 24, 2008							       BSD
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