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Asked: 2026-05-11T12:23:37+00:00

May God never give you the bane of working on Solaris. Now, I am

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May God never give you the bane of working on Solaris. Now, I am trying to run this simple shell script:

#!/bin/sh  input='a b c' data='123'  while read eachline do          data='$data$eachline' done <<  EOF $(echo '$input') EOF  echo '$data' exit 0

On RHEL(BASH) I receive output as expected i.e ‘123abc’, however, on Solaris I receive just ‘123’.

After fair bit of googling, I realized that Solaris is forking a process for code inside the while loop and hence the variable’s($data) value is not reflected on the outside of while loop.

Any hope to make this code compatible on both platforms would be greatly appreciated.

And oh yes, using a temp file for redirection would not be a very elegant solution 😐 .

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1 Answer

  1. This code below solved my problem. I guess the key here was to echo the variable from within the subshell and ofcourse, not use the ‘here’ document.

    I have tested this code on CSH/BASH/KSH.

    #!/bin/sh input='a b c'  printf '$input' | {  data='123' while read eachline do           data='$data$eachline' done  echo '$data' }  exit 0

    My heartfelt thanks to all who participated in this discussion.

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