Help with code Post: 302753637

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Top Forums Shell Programming and Scripting Help with code Post 302753637 by Don Cragun on Wednesday 9th of January 2013 05:54:00 AM

01-09-2013

Registered User

Here are a couple of ways to do what you want:

Code:

#!/bin/ksh
echo simplififed translation from given code
while read i
do      grep $i /tmp/b | awk '{printf("echo mail -s \"%s is your new ID\" %s@companydomain.com", $2, $1)}' | ksh
done < /tmp/a

echo awk replacement
awk 'FNR == NR {
        newID[$1] = $2
        next
}
{       printf("echo mail -s \"%s is your new ID\" %s@companydomain.com\n",
                newID[$1], $1);
}' /tmp/b /tmp/a | ksh

I use ksh and I added echo commands in several places so it will show what it will do rather than actually invoke mail to send messages. You'll need to change /bin/ksh in the first line of the script to the absolute pathname of a shell on your system that processes traditional Bourne shell command syntax (e.g., bash, ksh, or sh) to run the script and then remove echo from the awk printf() command after you verify that the script does what you want.

Choose whichever code segment you prefer to use. They both should do what you want. The first segment is a simplified and corrected version of what it looked like you were trying to do. The second one produces the same results, but should be more efficient.

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LEARN ABOUT OPENSOLARIS

echo

echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME

       echo - echo arguments to standard output

SYNOPSIS

       /usr/ucb/echo [-n] [argument]

DESCRIPTION

       echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.

       echo  is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
       ronment variables.

       For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:

	   o	  echo your current-working-directory's full pathname

	   o	  pipe the output through tr to translate the path's embedded slash-characters into space-characters

	   o	  pipe that output through wc -w for a count of the names in your path.

		    example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"

       See tr(1) and wc(1) for their functionality.

       The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be  invoked	if
       the  user  calls  echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
       characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the  black-slashed  escape  characters,	and  ksh's
       echo() also understands a as the audible bell character; however, these commands do not have an -n option.

OPTIONS

       -n    Do not add the NEWLINE to the output.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5)

NOTES

       The -n option is a transition aid for BSD applications, and may not be supported in future  releases.

SunOS 5.11							    3 Aug 1994								  echo(1B)