CODEWITHSUNDEEP
shellbusyboxash
SpliFF
SpliFF

Reputation: 39014

error sh: 0: not found while converting bash function to sh

The function below was originally a bash function. I need it to run in busybox 1.22 ash shell. 

dockerip() {
  if (( $# != 1 ))
  then
    for d in $(docker ps -q)
    do
      name=$(docker inspect -f {{.Name}} $d)
      ip=$(docker inspect -f {{.NetworkSettings.IPAddress}} $d)
      printf "%-15s | %15s\n" $name $ip
    done
  fi
}

When the code above is loaded with source and run as dockerip the busybox shell outputs: sh: 0: not found. Not a very helpful error so my question is what does the error mean and what part(s) of the function above aren't busybox 1.22 compatible?

Upvotes: 0

Views: 1846

Answers (1)

glenn jackman
glenn jackman

Reputation: 247052

This arithmetic expression (( $# != 1 )) is bash syntax. In ash, it's launching 2 nested subshells, then executing the program "$#" with arguments "!=" and "1".

Use this instead

if [ $# -ne 1 ]

Upvotes: 3

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