How can I get `apt-get update` to reflect error status in its exit code?












0














When running sudo apt-get update -q, sometimes I see things like



Err:23 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main i386 Packages
Could not connect to ppa.launchpad.net:80 (91.189.95.83), connection timed out
Err:24 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main Translation-en
Unable to connect to ppa.launchpad.net:http:


or like



W: http://us-central1.gce.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)


But echo $? tells me that apt-get update -q succeeded. How can I get the error/warning status to be fatal, and make apt-get update fail with a non-zero exit code?










share|improve this question


















  • 1




    Hmmmm, if I run it with an error my echo $? returns 100. Without errors it returns 0.
    – Terrance
    Jan 16 '18 at 16:54










  • Hmmm, maybe I was misreading the travis logs I was looking at... What about when there are warnings?
    – Jason Gross
    Jan 16 '18 at 21:40






  • 1




    Look at unix.stackexchange.com/questions/175146/… in the answer there is a little script that could detect both W: and E:. But when I did the apt update -q with just warnings, I got 0 on the echo $?. But the script passed and got both errors and warnings.
    – Terrance
    Jan 16 '18 at 22:18
















0














When running sudo apt-get update -q, sometimes I see things like



Err:23 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main i386 Packages
Could not connect to ppa.launchpad.net:80 (91.189.95.83), connection timed out
Err:24 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main Translation-en
Unable to connect to ppa.launchpad.net:http:


or like



W: http://us-central1.gce.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)


But echo $? tells me that apt-get update -q succeeded. How can I get the error/warning status to be fatal, and make apt-get update fail with a non-zero exit code?










share|improve this question


















  • 1




    Hmmmm, if I run it with an error my echo $? returns 100. Without errors it returns 0.
    – Terrance
    Jan 16 '18 at 16:54










  • Hmmm, maybe I was misreading the travis logs I was looking at... What about when there are warnings?
    – Jason Gross
    Jan 16 '18 at 21:40






  • 1




    Look at unix.stackexchange.com/questions/175146/… in the answer there is a little script that could detect both W: and E:. But when I did the apt update -q with just warnings, I got 0 on the echo $?. But the script passed and got both errors and warnings.
    – Terrance
    Jan 16 '18 at 22:18














0












0








0







When running sudo apt-get update -q, sometimes I see things like



Err:23 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main i386 Packages
Could not connect to ppa.launchpad.net:80 (91.189.95.83), connection timed out
Err:24 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main Translation-en
Unable to connect to ppa.launchpad.net:http:


or like



W: http://us-central1.gce.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)


But echo $? tells me that apt-get update -q succeeded. How can I get the error/warning status to be fatal, and make apt-get update fail with a non-zero exit code?










share|improve this question













When running sudo apt-get update -q, sometimes I see things like



Err:23 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main i386 Packages
Could not connect to ppa.launchpad.net:80 (91.189.95.83), connection timed out
Err:24 http://ppa.launchpad.net/chris-lea/redis-server/ubuntu precise/main Translation-en
Unable to connect to ppa.launchpad.net:http:


or like



W: http://us-central1.gce.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)


But echo $? tells me that apt-get update -q succeeded. How can I get the error/warning status to be fatal, and make apt-get update fail with a non-zero exit code?







apt updates error-handling aptitude






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Jan 16 '18 at 16:41









Jason Gross

1034




1034








  • 1




    Hmmmm, if I run it with an error my echo $? returns 100. Without errors it returns 0.
    – Terrance
    Jan 16 '18 at 16:54










  • Hmmm, maybe I was misreading the travis logs I was looking at... What about when there are warnings?
    – Jason Gross
    Jan 16 '18 at 21:40






  • 1




    Look at unix.stackexchange.com/questions/175146/… in the answer there is a little script that could detect both W: and E:. But when I did the apt update -q with just warnings, I got 0 on the echo $?. But the script passed and got both errors and warnings.
    – Terrance
    Jan 16 '18 at 22:18














  • 1




    Hmmmm, if I run it with an error my echo $? returns 100. Without errors it returns 0.
    – Terrance
    Jan 16 '18 at 16:54










  • Hmmm, maybe I was misreading the travis logs I was looking at... What about when there are warnings?
    – Jason Gross
    Jan 16 '18 at 21:40






  • 1




    Look at unix.stackexchange.com/questions/175146/… in the answer there is a little script that could detect both W: and E:. But when I did the apt update -q with just warnings, I got 0 on the echo $?. But the script passed and got both errors and warnings.
    – Terrance
    Jan 16 '18 at 22:18








1




1




Hmmmm, if I run it with an error my echo $? returns 100. Without errors it returns 0.
– Terrance
Jan 16 '18 at 16:54




Hmmmm, if I run it with an error my echo $? returns 100. Without errors it returns 0.
– Terrance
Jan 16 '18 at 16:54












Hmmm, maybe I was misreading the travis logs I was looking at... What about when there are warnings?
– Jason Gross
Jan 16 '18 at 21:40




Hmmm, maybe I was misreading the travis logs I was looking at... What about when there are warnings?
– Jason Gross
Jan 16 '18 at 21:40




1




1




Look at unix.stackexchange.com/questions/175146/… in the answer there is a little script that could detect both W: and E:. But when I did the apt update -q with just warnings, I got 0 on the echo $?. But the script passed and got both errors and warnings.
– Terrance
Jan 16 '18 at 22:18




Look at unix.stackexchange.com/questions/175146/… in the answer there is a little script that could detect both W: and E:. But when I did the apt update -q with just warnings, I got 0 on the echo $?. But the script passed and got both errors and warnings.
– Terrance
Jan 16 '18 at 22:18










2 Answers
2






active

oldest

votes


















1














You could create a bash script that check the command output :



if { apt-get update 2>&1 || echo E: update failed; } > result.txt; cat result.txt | grep -q '^[(W)|(E]:'; then
echo error
else (
if cat result.txt | grep -q '^[(Get)]:'; then
echo repaired
else
echo success
fi
)
fi


Here, we check if a line start with E (Err: or E:, etc..) for errors or with W for warnings. Both return the status code error.



If there is no error and there is a Get:, it means that we update our repos. It returns the status code repaired.



And finally, if we havent encountered any of those, the script was a success.






share|improve this answer





























    1














    As mentioned by @Terrance, this question is very close to that other question apt-get update exit status (in Unix & Linux StackExchange).



    FYI I've just posted there another solution that can also be combined with the travis_retry Travis CI command (which might be the intended use case of the OP):



    exec {fd}>&2 # copy stderr to some unused fd
    travis_retry bash -o pipefail -c "sudo apt-get update -y -q 2>&1 | tee /dev/fd/$fd | ( ! grep -q -e '^Err:' -e '^E:' )"
    exec {fd}>&- # close file descriptor





    share|improve this answer





















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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

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      1














      You could create a bash script that check the command output :



      if { apt-get update 2>&1 || echo E: update failed; } > result.txt; cat result.txt | grep -q '^[(W)|(E]:'; then
      echo error
      else (
      if cat result.txt | grep -q '^[(Get)]:'; then
      echo repaired
      else
      echo success
      fi
      )
      fi


      Here, we check if a line start with E (Err: or E:, etc..) for errors or with W for warnings. Both return the status code error.



      If there is no error and there is a Get:, it means that we update our repos. It returns the status code repaired.



      And finally, if we havent encountered any of those, the script was a success.






      share|improve this answer


























        1














        You could create a bash script that check the command output :



        if { apt-get update 2>&1 || echo E: update failed; } > result.txt; cat result.txt | grep -q '^[(W)|(E]:'; then
        echo error
        else (
        if cat result.txt | grep -q '^[(Get)]:'; then
        echo repaired
        else
        echo success
        fi
        )
        fi


        Here, we check if a line start with E (Err: or E:, etc..) for errors or with W for warnings. Both return the status code error.



        If there is no error and there is a Get:, it means that we update our repos. It returns the status code repaired.



        And finally, if we havent encountered any of those, the script was a success.






        share|improve this answer
























          1












          1








          1






          You could create a bash script that check the command output :



          if { apt-get update 2>&1 || echo E: update failed; } > result.txt; cat result.txt | grep -q '^[(W)|(E]:'; then
          echo error
          else (
          if cat result.txt | grep -q '^[(Get)]:'; then
          echo repaired
          else
          echo success
          fi
          )
          fi


          Here, we check if a line start with E (Err: or E:, etc..) for errors or with W for warnings. Both return the status code error.



          If there is no error and there is a Get:, it means that we update our repos. It returns the status code repaired.



          And finally, if we havent encountered any of those, the script was a success.






          share|improve this answer












          You could create a bash script that check the command output :



          if { apt-get update 2>&1 || echo E: update failed; } > result.txt; cat result.txt | grep -q '^[(W)|(E]:'; then
          echo error
          else (
          if cat result.txt | grep -q '^[(Get)]:'; then
          echo repaired
          else
          echo success
          fi
          )
          fi


          Here, we check if a line start with E (Err: or E:, etc..) for errors or with W for warnings. Both return the status code error.



          If there is no error and there is a Get:, it means that we update our repos. It returns the status code repaired.



          And finally, if we havent encountered any of those, the script was a success.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Apr 24 '18 at 14:31









          Quentin Pétel

          112




          112

























              1














              As mentioned by @Terrance, this question is very close to that other question apt-get update exit status (in Unix & Linux StackExchange).



              FYI I've just posted there another solution that can also be combined with the travis_retry Travis CI command (which might be the intended use case of the OP):



              exec {fd}>&2 # copy stderr to some unused fd
              travis_retry bash -o pipefail -c "sudo apt-get update -y -q 2>&1 | tee /dev/fd/$fd | ( ! grep -q -e '^Err:' -e '^E:' )"
              exec {fd}>&- # close file descriptor





              share|improve this answer


























                1














                As mentioned by @Terrance, this question is very close to that other question apt-get update exit status (in Unix & Linux StackExchange).



                FYI I've just posted there another solution that can also be combined with the travis_retry Travis CI command (which might be the intended use case of the OP):



                exec {fd}>&2 # copy stderr to some unused fd
                travis_retry bash -o pipefail -c "sudo apt-get update -y -q 2>&1 | tee /dev/fd/$fd | ( ! grep -q -e '^Err:' -e '^E:' )"
                exec {fd}>&- # close file descriptor





                share|improve this answer
























                  1












                  1








                  1






                  As mentioned by @Terrance, this question is very close to that other question apt-get update exit status (in Unix & Linux StackExchange).



                  FYI I've just posted there another solution that can also be combined with the travis_retry Travis CI command (which might be the intended use case of the OP):



                  exec {fd}>&2 # copy stderr to some unused fd
                  travis_retry bash -o pipefail -c "sudo apt-get update -y -q 2>&1 | tee /dev/fd/$fd | ( ! grep -q -e '^Err:' -e '^E:' )"
                  exec {fd}>&- # close file descriptor





                  share|improve this answer












                  As mentioned by @Terrance, this question is very close to that other question apt-get update exit status (in Unix & Linux StackExchange).



                  FYI I've just posted there another solution that can also be combined with the travis_retry Travis CI command (which might be the intended use case of the OP):



                  exec {fd}>&2 # copy stderr to some unused fd
                  travis_retry bash -o pipefail -c "sudo apt-get update -y -q 2>&1 | tee /dev/fd/$fd | ( ! grep -q -e '^Err:' -e '^E:' )"
                  exec {fd}>&- # close file descriptor






                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Aug 13 '18 at 12:53









                  ErikMD

                  1113




                  1113






























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