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Full Discussion: AWK sub function curious problem under bash
Top Forums UNIX for Advanced & Expert Users AWK sub function curious problem under bash Post 302370865 by Max Rebo on Thursday 12th of November 2009 05:01:24 PM
Old 11-12-2009
Ahh, so you have heard about the little blue elephant (who is not an elephant)? Exxxxcellent.

-OK- Next problem that is perplexing me (in the same large-print-file problem) is another corker... grrr.
Code:
#!/bin/bash
##### Detect potential too-large reports
function get-last-page()
{
   if [ $# == 1 ] && [ -s $1 ] && grep -qs "Page " $1 ; then # File is valid
      PAGES=`awk '/Page/{ f=$NF }; END{ sub(/Page/,"",f); print f }' $1;`
#     echo $PAGES
      if [ "$PAGES" -gt "100" ]; then
         get-operator-option $1 $PAGES "Pages"
         return $?
      fi
   fi
}
##### Ask operator how to handle too-large report
function get-operator-option()
{
   echo -e "The system has detected that your report may be larger than you"
   echo -e "expected.  You need to decide what to do with this report.\n"
   echo -e "Your $1 report is $2 $3.\n"
   echo -e "No matter what you decide your report is saved to disk now.\n"
   echo -e "Please select from the following options (Enter 1, 2, 3, or 4):\n"
   select OPTION in \
                    "Print large report anyway."                     \
                    "Don't print large report (cancel print)."       \
                    "E-mail me information on this report (cancel)." \
                    "E-mail IT department on this report (cancel)."
   do
      case \($REPLY\) in
        "1") return 0;;  # Print  report
        "2") return 1;;  # Cancel report
        "3") return 2;;  # Cancel report and email info to user and IT
#           send-too-large-email ${USER} ${PROGRAM} ${SPOOLFILE};&
        "4") return 3;;  # Cancel report and email info to IT
#           send-too-large-email "IT" ${PROGRAM} ${SPOOLFILE};;
      esac
   done
}
 
#### Test for too-large print job
if [ $(get-last-page $1) -gt 0 ]; then
   echo "exit TESTING: $?"
   read x;
fi
echo "normal TESTING: $?"
read x;

I don't know how I get myself in these fixes, but when I test my script using this function I -NEVER- see the message echo'ed at the top of my get-operator-option function. It goes straight to the select OPTION clause.

(-btw- when I type the function into my current shell and run it as an immediate function, not from a script file, I see the echo'ed text! ai!)

Why is echo not working at the top of the get-operator-option function? What silly little thing am I missing?

TIAA
 

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LEARN ABOUT PHP

round

ROUND(3)								 1								  ROUND(3)

round - Rounds a float

SYNOPSIS

       float round (float  $val, [int  $precision], [int  $mode = PHP_ROUND_HALF_UP])

DESCRIPTION

	Returns  the  rounded value of $val to specified $precision (number of digits after the decimal point). $precision can also be negative or
       zero (default).

       Note

	       PHP doesn't handle strings like "12,300.2" correctly by default. See converting from strings.

PARAMETERS

	      o $val
		- The value to round

	      o $precision
		- The optional number of decimal digits to round to.

	      o $mode
		- Use one of the following constants to specify the mode in which rounding occurs.

	      +--------------------+---------------------------------------------------+
	      |     Constant	   |						       |
	      | 		   |						       |
	      | 		   |			Description		       |
	      | 		   |						       |
	      +--------------------+---------------------------------------------------+
	      | 		   |						       |
	      | PHP_ROUND_HALF_UP  |						       |
	      | 		   |						       |
	      | 		   |  Round $val up to $precision decimal places  away |
	      | 		   | from  zero, when it is half way there. Making 1.5 |
	      | 		   | into 2 and -1.5 into -2.			       |
	      | 		   |						       |
	      | 		   |						       |
	      |PHP_ROUND_HALF_DOWN |						       |
	      | 		   |						       |
	      | 		   |  Round $val down  to  $precision  decimal	places |
	      | 		   | towards  zero,  when it is half way there. Making |
	      | 		   | 1.5 into 1 and -1.5 into -1.		       |
	      | 		   |						       |
	      | 		   |						       |
	      |PHP_ROUND_HALF_EVEN |						       |
	      | 		   |						       |
	      | 		   |  Round $val to $precision decimal places  towards |
	      | 		   | the next even value.			       |
	      | 		   |						       |
	      | 		   |						       |
	      |PHP_ROUND_HALF_ODD  |						       |
	      | 		   |						       |
	      | 		   |  Round  $val to $precision decimal places towards |
	      | 		   | the next odd value.			       |
	      | 		   |						       |
	      +--------------------+---------------------------------------------------+
RETURN VALUES

	The rounded value

EXAMPLES

       Example #1

	      round(3) examples

	      <?php
	      echo round(3.4);	       // 3
	      echo round(3.5);	       // 4
	      echo round(3.6);	       // 4
	      echo round(3.6, 0);      // 4
	      echo round(1.95583, 2);  // 1.96
	      echo round(1241757, -3); // 1242000
	      echo round(5.045, 2);    // 5.05
	      echo round(5.055, 2);    // 5.06
	      ?>

       Example #2

	      $mode examples

	      <?php
	      echo round(9.5, 0, PHP_ROUND_HALF_UP);   // 10
	      echo round(9.5, 0, PHP_ROUND_HALF_DOWN); // 9
	      echo round(9.5, 0, PHP_ROUND_HALF_EVEN); // 10
	      echo round(9.5, 0, PHP_ROUND_HALF_ODD);  // 9

	      echo round(8.5, 0, PHP_ROUND_HALF_UP);   // 9
	      echo round(8.5, 0, PHP_ROUND_HALF_DOWN); // 8
	      echo round(8.5, 0, PHP_ROUND_HALF_EVEN); // 8
	      echo round(8.5, 0, PHP_ROUND_HALF_ODD);  // 9
	      ?>

       Example #3

	      $mode with precision examples

	      <?php
	      /* Using PHP_ROUND_HALF_UP with 1 decimal digit precision */
	      echo round( 1.55, 1, PHP_ROUND_HALF_UP);	 //  1.6
	      echo round( 1.54, 1, PHP_ROUND_HALF_UP);	 //  1.5
	      echo round(-1.55, 1, PHP_ROUND_HALF_UP);	 // -1.6
	      echo round(-1.54, 1, PHP_ROUND_HALF_UP);	 // -1.5

	      /* Using PHP_ROUND_HALF_DOWN with 1 decimal digit precision */
	      echo round( 1.55, 1, PHP_ROUND_HALF_DOWN); //  1.5
	      echo round( 1.54, 1, PHP_ROUND_HALF_DOWN); //  1.5
	      echo round(-1.55, 1, PHP_ROUND_HALF_DOWN); // -1.5
	      echo round(-1.54, 1, PHP_ROUND_HALF_DOWN); // -1.5

	      /* Using PHP_ROUND_HALF_EVEN with 1 decimal digit precision */
	      echo round( 1.55, 1, PHP_ROUND_HALF_EVEN); //  1.6
	      echo round( 1.54, 1, PHP_ROUND_HALF_EVEN); //  1.5
	      echo round(-1.55, 1, PHP_ROUND_HALF_EVEN); // -1.6
	      echo round(-1.54, 1, PHP_ROUND_HALF_EVEN); // -1.5

	      /* Using PHP_ROUND_HALF_ODD with 1 decimal digit precision */
	      echo round( 1.55, 1, PHP_ROUND_HALF_ODD);  //  1.5
	      echo round( 1.54, 1, PHP_ROUND_HALF_ODD);  //  1.5
	      echo round(-1.55, 1, PHP_ROUND_HALF_ODD);  // -1.5
	      echo round(-1.54, 1, PHP_ROUND_HALF_ODD);  // -1.5
	      ?>

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.0	|						    |
       |	|						    |
       |	|	 The $mode parameter was introduced.	    |
       |	|						    |
       | 5.2.7	|						    |
       |	|						    |
       |	|  The inner workings of round(3)  was	changed  to |
       |	| conform to the C99 standard.			    |
       |	|						    |
       +--------+---------------------------------------------------+
SEE ALSO

       ceil(3), floor(3), number_format(3).

PHP Documentation Group 														  ROUND(3)
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