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Full Discussion: AWK Utitlity
Top Forums Shell Programming and Scripting AWK Utitlity Post 302335772 by durden_tyler on Monday 20th of July 2009 11:49:51 AM
Old 07-20-2009
You may want to consider Perl. String manipulation in Perl is amazingly flexible.

Quote:
Originally Posted by RSC1985
I have replace one particular substring in a string.I could get the substring value using awk command.
...
I need to replace this with a new value in the same string.
Please throw some light on this.
To perform inline conversion of the substring "defg" to "DEFG" in the string "abcdefg":

Code:
$
$ echo $x
abcdefg
$
$ echo $x | perl -ne 's/defg/DEFG/; print'
abcDEFG
$

Quote:
Originally Posted by RSC1985
...
More over the above solution only replaces the first occurance of the substring. But if i have many occurances like that how can i do that if want the replacement to be done at a particular place?
Let's say the string is "abcdefg abcdefg abcdefg". And you want to replace (inline) the second occurrence of "defg" to "UVWXYZ".

Code:
$
$ # Original string    => "abcdefg abcdefg abcdefg"
$ # Transformed string => "abcdefg abcUVWXYZ abcdefg"
$
$ echo $y
abcdefg abcdefg abcdefg
$
$ echo $y | perl -ne '$c=0; s{(abc)(defg)}{if (++$c==2){ $1."UVWXYZ" }else{ $1.$2 }}gex; print'
abcdefg abcUVWXYZ abcdefg
$

HTH,
tyler_durden

---------- Post updated at 11:49 AM ---------- Previous update was at 11:40 AM ----------

The code posted above was the solution of the problem: "In the string S, replace inline the Nth occurrence of substring X to Y".

If the problem is: "In the string S, replace inline to X, the substring of length M starting at position N", then that is simpler in Perl.

Code:
$
$ echo $y
abcdefg abcdefg abcdefg
$
$ # Replace the substring of 4 characters, starting at position 11, to "UVWXYZ"
$
$ echo $y | perl -ne 'substr($_,11,4)="UVWXYZ"; print'
abcdefg abcUVWXYZ abcdefg
$

tyler_durden
 

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LEARN ABOUT HPUX

mailq

mailq(1)						      General Commands Manual							  mailq(1)

NAME

       mailq - prints the mail queue

SYNOPSIS

DESCRIPTION

       prints a summary of the mail messages queued for future delivery.

       The  first line printed for each message shows the internal identifier used on this host for the message, the size of the message in bytes,
       the date and time the message was accepted into the queue, and the envelope sender of the message.  The second line shows the error message
       that  caused  this  message  to be retained in the queue; it will not be present if the message is being processed for the first time.  The
       status characters are:

	      to indicate that the job is being processed

	      to indicate that the load is too high to process the job

	      to indicate that the job is too new in the queue to process.

       The output lines that follow the second line show the message recipients, one per line.

       is identical to

   Options
       The supported options are:

       Show the mail submission queue specified in the
		       file instead of the MTA queue specified in the file.

       Show the lost items in the mail queue instead of normal queue items.

       Show the quarantined items in the mail queue instead
		       of the normal queue items.

       Limit processed jobs to those containing
		       substr as a substring of the queue ID or not when is specified.

       Limit processed jobs to quarantined jobs containing
		       substr as a substring of the quarantine reason or not when is specified.

       Limit processed jobs to those containing
		       substr as a substring of one of the recipients or not when is specified.

       Limit processed jobs to those containing
		       substr as a substring of the sender or not when is specified.

       Print verbose information.
		       This adds the priority of the message and a single character indicator or blank) indicating whether a warning  message  has
		       been  sent on the first line of the message.  In addition, extra lines may be intermixed with the recipients indicating the
		       `controlling user' information.	This shows who owns the programs that are executed on behalf of this message and the  name
		       of the alias this command expanded from, if any.

RETURN VALUE

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

AUTHOR

       was developed by the University of California, Berkeley, and originally appeared in 4.0BSD.

FILES

       mail queue files for

SEE ALSO

       sendmail(1M).

																	  mailq(1)
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