Why is variable being incremented? - bash

Question

Could someone help me figure why is the variable "$valorbase" in my script being incremented. It should continue the process for the next line when "$valorbase=8", though it happens only for the first line. Then it starts incrementing the numbers and dont stop when value 8 is reached.
Thanks!
#!/bin/bash
while read -r line <&3
do
valorbase=8
valor=0
echo "$line"
echo "Valor:"
read -r valor
echo "$valor" >&5
echo "||||||""$valor""|" >&6
valordasoma=$(awk -F"|" '{ sum += $1 } END { print sum }' < soma.txt)
var=$(awk -v o1=$valordasoma -v t1=$valorbase 'BEGIN { print (o1 >= t1)?"1":"0" }' < soma.txt)
if [[ $var -ge 1 ]]
then
echo "Valor da soma > que, ou = ao valor base"
echo "Repete comando para a linha"
else [[ $var -lt 1 ]]
until [[ $var -eq 1 ]]
do
echo "Valor:"
read -r valor
echo "$valor" >&5
echo "||||||""$valor""|" >&6
valordasoma=$(awk -F"|" '{ sum += $1 } END { print sum }' < soma.txt)
var=$(awk -v o1=$valordasoma -v t1=$valorbase 'BEGIN { print (o1 >= t1)?"1":"0" }' < soma.txt)
if [[ $var -eq 1 ]]
then
> soma.txt
else
:
fi
done
fi
done 3<resultado.txt 5>soma.txt 6>partidasdobradas.txt
resultado.txt
TEST| 31|02/05/2015|6.1.1.01.001|2.1.1.01.005||8.100|DIVERSOS|||N||| ||S|CB|||05|||||||31.000|N|N|||0.000|
TEST| 34|03/05/2015|6.1.1.01.002|2.1.1.01.005||6.900|DIVERSOS|||N||| ||S|CB|||05|||||||34.000|N|N|||0.000|
TEST| 36|03/05/2015|6.1.1.01.002|2.1.1.01.005||8.900|DIVERSOS|||N||| ||S|CB|||05|||||||36.000|N|N|||0.000|
TEST| 38|04/05/2015|6.1.1.01.001|2.1.1.01.005||13.490|DIVERSOS|||N||| ||S|CB|||05|||||||38.000|N|N|||0.000|
TEST| 64|12/05/2015|6.1.1.01.001|2.1.1.01.005||6.780|DIVERSOS|||N||| ||S|CB|||05|||||||64.000|N|N|||0.000|

Answer 1

When you write to soma.txt using >&5 inside the loop, it writes to the file at the current position in the file. When you truncate the file with > soma.txt, the current position isn't reset, so future writes go into the middle of the file, with a bunch of nulls at the beginning.
You should truncate the file before the loop, then use 5>>soma.txt as the redirection of the loop, so it will write in append mode. This will make it automatically seek to the current end of the file.
#!/bin/bash
>soma.txt
while read -r line <&3
do
valorbase=8
valor=0
echo "$line"
echo "Valor:"
read -r valor
echo "$valor" >&5
echo "||||||""$valor""|" >&6
valordasoma=$(awk -F"|" '{ sum += $1 } END { print sum }' < soma.txt)
var=$(awk -v o1=$valordasoma -v t1=$valorbase 'BEGIN { print (o1 >= t1)?"1":"0" }' < soma.txt)
if [[ $var -ge 1 ]]
then
echo "Valor da soma > que, ou = ao valor base"
echo "Repete comando para a linha"
else [[ $var -lt 1 ]]
until [[ $var -eq 1 ]]
do
echo "Valor:"
read -r valor
echo "$valor" >&5
echo "||||||""$valor""|" >&6
valordasoma=$(awk -F"|" '{ sum += $1 } END { print sum }' < soma.txt)
var=$(awk -v o1=$valordasoma -v t1=$valorbase 'BEGIN { print (o1 >= t1)?"1":"0" }' < soma.txt)
if [[ $var -eq 1 ]]
then
> soma.txt
else
:
fi
done
fi
done 3<resultado.txt 5>>soma.txt 6>partidasdobradas.txt