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Full Discussion: set -options not working inside for loop?
Top Forums Shell Programming and Scripting set -options not working inside for loop? Post 302497417 by kasumlolla on Thursday 17th of February 2011 06:23:58 AM
Old 02-17-2011
set -options not working inside for loop?
I'm a beginner in shell scripting (I'm using ksh). I'm manipulating some files and I'm using set -A to transform each read line into a numeric array.
However, inside the 'for' loop the options of set (ie '-A') are not recognized (the vi editor doesn't highlight it and it doesn't work).

Where is my error?

My data.entry.* files are of the format:
Code:
   2 number_of_variables
-1.654824e+02    x1
-2.4685125e+01   x2

Code:
FILEIN="data.entry."   # I've got files named like data.entry.34
FILEOUT="global_entries"
 
files=`ls $FILEIN* | cut -d "." -f 3 | sort -n`
set -A F $files                      #THIS set -A works properly
FirstEvaluation=${F[0]}
echo $FirstEvaluation First_Evaluation_Number > $FILEOUT
 
for f in $files; do
   let "count=0"
   VarsArray=" "
   while read myline;
   do
 if (($count == 0));then 
    set -A WORDS $myline   # The -A is not recognized as a set option!?
    let "NumVars=${WORDS[0]}"
 elif (($count <= $NumVars));then
    set -A WORDS $myline     # The -A is not recognized as a set option!?
    VarX=${WORDS[0]}
           VarsArray=$VarsArray"    "$VarX
 else
    break
 fi
 ((count++))
   done < $FILEIN$f
 
   echo $VarsArray >> $FILEOUT 
done

 

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LEARN ABOUT SUNOS

continue

break(1)							   User Commands							  break(1)

NAME

       break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until	loop

SYNOPSIS

   sh
       break [n]

       continue [n]

   csh
       break

       continue

   ksh
       *break [n]

       *continue [n]

DESCRIPTION

   sh
       The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels.

       The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop.

   csh
       The  break  utility  resumes  execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current
       line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line.

       The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop.

   ksh
       The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified,	then  break  n	levels.  If  n	is
       greater than the number of enclosing loops, the outermost enclosing loop shall be exited.

       The  continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n-
       th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a  vari-
	   able  assignment.  This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera-
	   tion are not performed.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), exit(1), ksh(1), sh( 1), attributes(5)

SunOS 5.10							    17 Jul 2002 							  break(1)
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