Read from a file and return new line with loop

Question

I have a file like

foo.txt

xxx B=C     D: A
yyy F=H     D:A
zzz K=L     D:  A
fff M=H     D:/llll
kkk S=D     D: /kkkkk

this is what I try to get;

xxx B=C;     D: A           ;pass
yyy F=H;     D:A            ;pass
zzz K=L;     D:  A          ;pass
fff M=H;     D:/llll        ;try
kkk S=D;     D: /kkkkk/bb   ;try

The second part of line which starts with "D:",if starts with "/", it should be write "try" else it has to write "pass" end of the line for every line in it.

I can read file like this but there is spaces which is another problem

In addition after "D:" always starts with "A" or "/".

I tried while loop but I have not succeeded.

cat /tmp/foo.txt | cut -d ":" -f,2

Output

 A      (one empty space)
A       (none)
   A    (three empty space)
/llll   (none)
 /kkkkk/bb (two empty space)

This is a example what I have tried

while read -r line;
do 
if [[ $line ]]; then
          echo $line "try"
else
          echo $line "pass" 
fi
done < foo.txt

Marco Bonelli · Accepted Answer · 2018-11-13 17:06:23Z

1

You can use awk, which makes it very easy to accomplish what you want:

awk '!/D: *\//{print $0 " ;pass"; next} {print $0 " ;try"}' foo.txt

Output:

xxx B=C     D: A ;pass
yyy F=H     D:A ;pass
zzz K=L     D:  A ;pass
fff M=H     D:/llll ;try
kkk S=D     D: /kkkkk ;try

This basically matches every line not containing D: and / and appends ;pass to it, then skips to the next line. Otherwise it appends ;try to it.

answered Nov 13, 2018 at 17:06

Marco Bonelli

4564 silver badges17 bronze badges

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Javier Salas · Accepted Answer · 2018-11-13 18:01:46Z

0

You can't write in the same file, I would recommend to create a new file and then rename it.

tmpFile="/tmp/foo2.txt.tmp"

cat /tmp/foo.txt | while read line; do
      isSlash=$(echo $line | cut -d ":" -f2 | awk '{print $1}' | grep -c ^"/")
      if (( $isSlash )); then
          echo "$line ;try" >> $tmpFile
      else 
          echo "$line ;pass" >> $tmpFile
      fi
done

mv $tmpFile /tmp/foo.txt

edited Nov 13, 2018 at 18:01

answered Nov 13, 2018 at 16:59

Javier Salas

1341 silver badge7 bronze badges

kkk S=D D: /kkkkk ;pass it writes pass beacause of the empty space before the "/" so can we add something that ignore the empty spaces?

1010111100011
– 1010111100011

2018-11-13 17:51:51 +00:00
Commented Nov 13, 2018 at 17:51
I updated my answer, awk '{print $1}' will solve the issue with the empty space.

Javier Salas
– Javier Salas

2018-11-13 18:02:23 +00:00
Commented Nov 13, 2018 at 18:02

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RudiC · Accepted Answer · 2018-11-13 17:32:07Z

0

sed OK?

$ sed '/D: *A/ s/$/\t;pass/; /D: *\// s/$/\t;try/' file
 xxx B=C     D: A   ;pass
 yyy F=H     D:A    ;pass
 zzz K=L     D:  A  ;pass
 fff M=H     D:/llll    ;try
 kkk S=D     D: /kkkkk  ;try

answered Nov 13, 2018 at 17:32

RudiC

9,0592 gold badges12 silver badges22 bronze badges

posixly: sed -e 's+D: */.*+&\t;try+ ; t' -e 's+$+\t;pass+'

user232326
– user232326

2018-11-13 21:18:59 +00:00
Commented Nov 13, 2018 at 21:18

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