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Full Discussion: assign value to variable is not working
Top Forums Shell Programming and Scripting assign value to variable is not working Post 302092905 by aigles on Friday 13th of October 2006 03:07:44 AM
Old 10-13-2006
Code:
#!/bin/ksh

echo > aux

while read label
do
   valor=1
   echo $label | grep "AS-"
   if [ $? -eq 0 ]
   then
      while read labelold
      do
         if [ "${label}" = "${labelold}" ]
         then
            #echo "encon" >aux2
            valor=0
            echo $valor
            break
         fi
         echo $valor #<--- Allways is 1
      done < hosts.old
      if [$valor -eq 1]
      then
         echo "$label" >> aux
      fi
   fi
done < hosts

After assigning the value 0 to your variable, you break the while loop so you never display the variable with the new value 0.

Whith KSH the modification of variable inside loops aren't lost (that is not the case with bourne shell).
Try the following script:
[CODE]var=init
ls | while read file
do
var="Last file is $file"
done



Jean-Pierre.
Last edited by aigles; 10-13-2006 at 08:46 AM..
 

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LEARN ABOUT MINIX

join

JOIN(1) 						      General Commands Manual							   JOIN(1)

NAME

       join - relational database operator

SYNOPSIS

       join [-an] [-e s] [-o list] [-tc] file1 file2

DESCRIPTION

       Join  forms,  on the standard output, a join of the two relations specified by the lines of file1 and file2.  If file1 is `-', the standard
       input is used.

       File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the  first	in
       each line.

       There  is  one line in the output for each pair of lines in file1 and file2 that have identical join fields.  The output line normally con-
       sists of the common field, then the rest of the line from file1, then the rest of the line from file2.

       Fields are normally separated by blank, tab or newline.	In this case, multiple separators count as one, and leading  separators  are  dis-
       carded.

       These options are recognized:

       -an    In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.

       -e s   Replace empty output fields by string s.

       -o list
	      Each output line comprises the fields specified in list, each element of which has the form n.m, where n is a file number and m is a
	      field number.

       -tc    Use character c as a separator (tab character).  Every appearance of c in a line is significant.

SEE ALSO

       sort(1), comm(1), awk(1).

BUGS

       With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.

       The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.

7th Edition							  April 29, 1985							   JOIN(1)
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