Shell Scripting - return to previous loop until process is completed then die/done

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I am writing a bash/shell script to automate some file filtering functions. Here is what I have written so far. Its based of a script I found online.



if (( $(ps -ef | grep $service | wc -l) > 0 ))
then
echo "$service is not done" >> /root/test.txt
else
(( $(wc -l /root/filter/first.txt) > 0 ))
if (( $(ps -ef | grep $service | wc -l) < 0 ))
then
./root/filter/filefilter.sh
else (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
if (( $(ps -ef | grep awk | wc -l) > 0 ))
then
(( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
else
# here is where I would like it to loop until the filtering is complete
# then once the final file is > 0 stop/die/done
fi
fi
fi


I would like it loop until the final.txt has been created in the dir, I will add that part in, just need assistance on the loop or return function ( if return can be used to return to line 1 and start running the script again until the final.txt is created then die/done/stop)










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migrated from serverfault.com May 17 '15 at 20:43


This question came from our site for system and network administrators.














  • Take a look at shellcheck.net and please indent your code.
    – Cyrus
    May 17 '15 at 6:00










  • As I mentioned I am new to coding and I do not know what you mean by indent, I followed the serverfault rules and made the code show up in the code box.
    – LinSheller
    May 17 '15 at 6:06










  • I do not need the code checked as the site you posted does, I need help coding it to loop back to line 1 until the final.txt is not empty then die/done/stop so unfortunately your link does not help me.
    – LinSheller
    May 17 '15 at 6:08






  • 2




    Also, what you're looking for is while instead of if on the first line. The man page for bash should tell you how it works.
    – Jenny D
    May 17 '15 at 6:13






  • 2




    you should probably be using [ -s filename ] for most of those wc -l tests,
    – mikeserv
    May 18 '15 at 1:35















up vote
-1
down vote

favorite












I am writing a bash/shell script to automate some file filtering functions. Here is what I have written so far. Its based of a script I found online.



if (( $(ps -ef | grep $service | wc -l) > 0 ))
then
echo "$service is not done" >> /root/test.txt
else
(( $(wc -l /root/filter/first.txt) > 0 ))
if (( $(ps -ef | grep $service | wc -l) < 0 ))
then
./root/filter/filefilter.sh
else (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
if (( $(ps -ef | grep awk | wc -l) > 0 ))
then
(( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
else
# here is where I would like it to loop until the filtering is complete
# then once the final file is > 0 stop/die/done
fi
fi
fi


I would like it loop until the final.txt has been created in the dir, I will add that part in, just need assistance on the loop or return function ( if return can be used to return to line 1 and start running the script again until the final.txt is created then die/done/stop)










share|improve this question















migrated from serverfault.com May 17 '15 at 20:43


This question came from our site for system and network administrators.














  • Take a look at shellcheck.net and please indent your code.
    – Cyrus
    May 17 '15 at 6:00










  • As I mentioned I am new to coding and I do not know what you mean by indent, I followed the serverfault rules and made the code show up in the code box.
    – LinSheller
    May 17 '15 at 6:06










  • I do not need the code checked as the site you posted does, I need help coding it to loop back to line 1 until the final.txt is not empty then die/done/stop so unfortunately your link does not help me.
    – LinSheller
    May 17 '15 at 6:08






  • 2




    Also, what you're looking for is while instead of if on the first line. The man page for bash should tell you how it works.
    – Jenny D
    May 17 '15 at 6:13






  • 2




    you should probably be using [ -s filename ] for most of those wc -l tests,
    – mikeserv
    May 18 '15 at 1:35













up vote
-1
down vote

favorite









up vote
-1
down vote

favorite











I am writing a bash/shell script to automate some file filtering functions. Here is what I have written so far. Its based of a script I found online.



if (( $(ps -ef | grep $service | wc -l) > 0 ))
then
echo "$service is not done" >> /root/test.txt
else
(( $(wc -l /root/filter/first.txt) > 0 ))
if (( $(ps -ef | grep $service | wc -l) < 0 ))
then
./root/filter/filefilter.sh
else (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
if (( $(ps -ef | grep awk | wc -l) > 0 ))
then
(( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
else
# here is where I would like it to loop until the filtering is complete
# then once the final file is > 0 stop/die/done
fi
fi
fi


I would like it loop until the final.txt has been created in the dir, I will add that part in, just need assistance on the loop or return function ( if return can be used to return to line 1 and start running the script again until the final.txt is created then die/done/stop)










share|improve this question















I am writing a bash/shell script to automate some file filtering functions. Here is what I have written so far. Its based of a script I found online.



if (( $(ps -ef | grep $service | wc -l) > 0 ))
then
echo "$service is not done" >> /root/test.txt
else
(( $(wc -l /root/filter/first.txt) > 0 ))
if (( $(ps -ef | grep $service | wc -l) < 0 ))
then
./root/filter/filefilter.sh
else (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
if (( $(ps -ef | grep awk | wc -l) > 0 ))
then
(( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
else
# here is where I would like it to loop until the filtering is complete
# then once the final file is > 0 stop/die/done
fi
fi
fi


I would like it loop until the final.txt has been created in the dir, I will add that part in, just need assistance on the loop or return function ( if return can be used to return to line 1 and start running the script again until the final.txt is created then die/done/stop)







linux bash shell-script






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edited 2 days ago









Rui F Ribeiro

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38.2k1475123










asked May 17 '15 at 5:33







LinSheller











migrated from serverfault.com May 17 '15 at 20:43


This question came from our site for system and network administrators.






migrated from serverfault.com May 17 '15 at 20:43


This question came from our site for system and network administrators.













  • Take a look at shellcheck.net and please indent your code.
    – Cyrus
    May 17 '15 at 6:00










  • As I mentioned I am new to coding and I do not know what you mean by indent, I followed the serverfault rules and made the code show up in the code box.
    – LinSheller
    May 17 '15 at 6:06










  • I do not need the code checked as the site you posted does, I need help coding it to loop back to line 1 until the final.txt is not empty then die/done/stop so unfortunately your link does not help me.
    – LinSheller
    May 17 '15 at 6:08






  • 2




    Also, what you're looking for is while instead of if on the first line. The man page for bash should tell you how it works.
    – Jenny D
    May 17 '15 at 6:13






  • 2




    you should probably be using [ -s filename ] for most of those wc -l tests,
    – mikeserv
    May 18 '15 at 1:35

















  • Take a look at shellcheck.net and please indent your code.
    – Cyrus
    May 17 '15 at 6:00










  • As I mentioned I am new to coding and I do not know what you mean by indent, I followed the serverfault rules and made the code show up in the code box.
    – LinSheller
    May 17 '15 at 6:06










  • I do not need the code checked as the site you posted does, I need help coding it to loop back to line 1 until the final.txt is not empty then die/done/stop so unfortunately your link does not help me.
    – LinSheller
    May 17 '15 at 6:08






  • 2




    Also, what you're looking for is while instead of if on the first line. The man page for bash should tell you how it works.
    – Jenny D
    May 17 '15 at 6:13






  • 2




    you should probably be using [ -s filename ] for most of those wc -l tests,
    – mikeserv
    May 18 '15 at 1:35
















Take a look at shellcheck.net and please indent your code.
– Cyrus
May 17 '15 at 6:00




Take a look at shellcheck.net and please indent your code.
– Cyrus
May 17 '15 at 6:00












As I mentioned I am new to coding and I do not know what you mean by indent, I followed the serverfault rules and made the code show up in the code box.
– LinSheller
May 17 '15 at 6:06




As I mentioned I am new to coding and I do not know what you mean by indent, I followed the serverfault rules and made the code show up in the code box.
– LinSheller
May 17 '15 at 6:06












I do not need the code checked as the site you posted does, I need help coding it to loop back to line 1 until the final.txt is not empty then die/done/stop so unfortunately your link does not help me.
– LinSheller
May 17 '15 at 6:08




I do not need the code checked as the site you posted does, I need help coding it to loop back to line 1 until the final.txt is not empty then die/done/stop so unfortunately your link does not help me.
– LinSheller
May 17 '15 at 6:08




2




2




Also, what you're looking for is while instead of if on the first line. The man page for bash should tell you how it works.
– Jenny D
May 17 '15 at 6:13




Also, what you're looking for is while instead of if on the first line. The man page for bash should tell you how it works.
– Jenny D
May 17 '15 at 6:13




2




2




you should probably be using [ -s filename ] for most of those wc -l tests,
– mikeserv
May 18 '15 at 1:35





you should probably be using [ -s filename ] for most of those wc -l tests,
– mikeserv
May 18 '15 at 1:35











1 Answer
1






active

oldest

votes

















up vote
0
down vote













I don't really understand some parts of your code.
1) Does the script filefilter.sh performs the filtering?
2) If yes, in what condition will it filters (eg. $service exist)
3) Are you filtering selected services or all processes running



Indent is pretty important in scripting as you can easily spot the loops clearly



[ Your Code ]:



if (( $(ps -ef | grep $service | wc -l) > 0 ))
then
echo "$service is not done" >> /root/test.txt
else
(( $(wc -l /root/filter/first.txt) > 0 )) #There is no condition required for the else-loop

if (( $(ps -ef | grep $service | wc -l) < 0 ))
then
./root/filter/filefilter.sh

else
(( $(ls | grep /root/filter/final.txt | wc -l) > 0 )) #There is no condition required for the else-loop

if (( $(ps -ef | grep awk | wc -l) > 0 ))
then
(( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
else
#You can use the exit command to stop the loop base on the condition you want

fi
fi
fi





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    1 Answer
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    1 Answer
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    up vote
    0
    down vote













    I don't really understand some parts of your code.
    1) Does the script filefilter.sh performs the filtering?
    2) If yes, in what condition will it filters (eg. $service exist)
    3) Are you filtering selected services or all processes running



    Indent is pretty important in scripting as you can easily spot the loops clearly



    [ Your Code ]:



    if (( $(ps -ef | grep $service | wc -l) > 0 ))
    then
    echo "$service is not done" >> /root/test.txt
    else
    (( $(wc -l /root/filter/first.txt) > 0 )) #There is no condition required for the else-loop

    if (( $(ps -ef | grep $service | wc -l) < 0 ))
    then
    ./root/filter/filefilter.sh

    else
    (( $(ls | grep /root/filter/final.txt | wc -l) > 0 )) #There is no condition required for the else-loop

    if (( $(ps -ef | grep awk | wc -l) > 0 ))
    then
    (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
    else
    #You can use the exit command to stop the loop base on the condition you want

    fi
    fi
    fi





    share|improve this answer
























      up vote
      0
      down vote













      I don't really understand some parts of your code.
      1) Does the script filefilter.sh performs the filtering?
      2) If yes, in what condition will it filters (eg. $service exist)
      3) Are you filtering selected services or all processes running



      Indent is pretty important in scripting as you can easily spot the loops clearly



      [ Your Code ]:



      if (( $(ps -ef | grep $service | wc -l) > 0 ))
      then
      echo "$service is not done" >> /root/test.txt
      else
      (( $(wc -l /root/filter/first.txt) > 0 )) #There is no condition required for the else-loop

      if (( $(ps -ef | grep $service | wc -l) < 0 ))
      then
      ./root/filter/filefilter.sh

      else
      (( $(ls | grep /root/filter/final.txt | wc -l) > 0 )) #There is no condition required for the else-loop

      if (( $(ps -ef | grep awk | wc -l) > 0 ))
      then
      (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
      else
      #You can use the exit command to stop the loop base on the condition you want

      fi
      fi
      fi





      share|improve this answer






















        up vote
        0
        down vote










        up vote
        0
        down vote









        I don't really understand some parts of your code.
        1) Does the script filefilter.sh performs the filtering?
        2) If yes, in what condition will it filters (eg. $service exist)
        3) Are you filtering selected services or all processes running



        Indent is pretty important in scripting as you can easily spot the loops clearly



        [ Your Code ]:



        if (( $(ps -ef | grep $service | wc -l) > 0 ))
        then
        echo "$service is not done" >> /root/test.txt
        else
        (( $(wc -l /root/filter/first.txt) > 0 )) #There is no condition required for the else-loop

        if (( $(ps -ef | grep $service | wc -l) < 0 ))
        then
        ./root/filter/filefilter.sh

        else
        (( $(ls | grep /root/filter/final.txt | wc -l) > 0 )) #There is no condition required for the else-loop

        if (( $(ps -ef | grep awk | wc -l) > 0 ))
        then
        (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
        else
        #You can use the exit command to stop the loop base on the condition you want

        fi
        fi
        fi





        share|improve this answer












        I don't really understand some parts of your code.
        1) Does the script filefilter.sh performs the filtering?
        2) If yes, in what condition will it filters (eg. $service exist)
        3) Are you filtering selected services or all processes running



        Indent is pretty important in scripting as you can easily spot the loops clearly



        [ Your Code ]:



        if (( $(ps -ef | grep $service | wc -l) > 0 ))
        then
        echo "$service is not done" >> /root/test.txt
        else
        (( $(wc -l /root/filter/first.txt) > 0 )) #There is no condition required for the else-loop

        if (( $(ps -ef | grep $service | wc -l) < 0 ))
        then
        ./root/filter/filefilter.sh

        else
        (( $(ls | grep /root/filter/final.txt | wc -l) > 0 )) #There is no condition required for the else-loop

        if (( $(ps -ef | grep awk | wc -l) > 0 ))
        then
        (( $(ls | grep /root/filter/final.txt | wc -l) > 0 ))
        else
        #You can use the exit command to stop the loop base on the condition you want

        fi
        fi
        fi






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jun 3 '15 at 8:08









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