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Full Discussion: Need help in assigning output of n commands to n variables automatically inside a for loop
Top Forums Shell Programming and Scripting Need help in assigning output of n commands to n variables automatically inside a for loop Post 302515634 by Corona688 on Wednesday 20th of April 2011 02:48:38 PM
Old 04-20-2011
If it's just numbers like 1|2|3|4, then

Code:
#!/bin/ksh

IFS="|"
# Read individual lines from inputfile
while read LINE
do
        # Split $LINE apart on IFS into the array CSI
        set -A CSI $LINE

        # Start at column 1.  Column 0 would be that time column
        N=1
        while [ ! -z "${CSI[$N]}" ]
        do
                # If the column is blank, set it to zero
                [ -z "${CS[$N]}" ] && ((CS[$N]=0))
                # Add the number to the column
                ((CS[$N] += CSI[$N]))
                # Add one to N
                ((N++))
        done
done < inputfile

N=1
while [ ! -z "${CS[$N]}" ]
do
        echo "cs$N=${CS[$N]}"
        ((N++))
done

Code:
$ cat >inputfile <<EOF
1|2|3|4
5|6|7|8
9|10|11|12
EOF
$ ./addcol.sh
cs1=18
cs2=21
cs3=24
$

---------- Post updated at 12:45 PM ---------- Previous update was at 12:41 PM ----------

Updated to fit your data better:

Code:
#!/bin/ksh

IFS="|"
# Read individual lines from inputfile
while read TIME LINE
do
        # Split $LINE apart on IFS into the array CSI
        set -A CSI $LINE

        N=0
        while [ ! -z "${CSI[$N]}" ]
        do
                [ -z "${CS[$N]}" ] && ((CS[$N]=0))
                ((CS[$N] += CSI[$N]))
                ((N++))
        done
done < inputfile

N=0
while [ ! -z "${CS[$N]}" ]
do
        echo "cs$N=${CS[$N]}"
        ((N++))
done

---------- Post updated at 12:48 PM ---------- Previous update was at 12:45 PM ----------

...or just do it all in awk then read it once into the shell:

Code:
LINE="`awk -v FS='|' '{ for(N=2; N<=NF; N++) { T[N]+=$N; MAX=N; } }
END { for(N=2; N<=MAX; N++) printf("%s ", T[N]); printf("\n"); }' inputfile`"

set -A CS $LINE

N=0
while [ ! -z "${CS[$N]}" ]
do
        echo "CS$N=${CS[$N]}"
        ((N++))
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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