msys2 - Why are newlines not honored in SSH command on Windows? - Stack Overflow

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When I run the script test.sh below from an MSYS2 terminal on Windows the newlines are not honored in the ssh command. The remote shell is cmd and the file is saved with Windows line endings (CR LF). Any ideas?

$ cat test.sh
text=$(cat <<'EOF'
hello
there
EOF
) 
printf "%s\n\n" "$text"

ssh A-WINDOWS-SERVER $(cat <<'EOF'
echo hello
echo there
EOF
)

$ sh test.sh
hello
there

hello echo there

When I run the script test.sh below from an MSYS2 terminal on Windows the newlines are not honored in the ssh command. The remote shell is cmd and the file is saved with Windows line endings (CR LF). Any ideas?

$ cat test.sh
text=$(cat <<'EOF'
hello
there
EOF
) 
printf "%s\n\n" "$text"

ssh A-WINDOWS-SERVER $(cat <<'EOF'
echo hello
echo there
EOF
)

$ sh test.sh
hello
there

hello echo there

• ssh
• msys2

Share Improve this question Follow asked Jan 23 at 19:16 August KarlstromAugust Karlstrom 11.4k88 gold badges4444 silver badges6969 bronze badges 2

• What environment does your Windows ssh server provide? The normal Windows shell doesn't understand "cat". – Tim Roberts Commented Jan 23 at 19:20
• @TimRoberts It's only the MSYS2 shell which will execute the cat commands. – August Karlstrom Commented Jan 23 at 19:28

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1 Answer 1

Sorted by: Reset to default 2

The problem here actually occurs in the original script, not in the ssh command. Remember that the $(...) gets executed locally, not remotely. Notice this, executed in Linux:

timr@Tims-NUC:~/src$ echo $(cat <<EOF
> hello
> there
> EOF
> )
hello there
timr@Tims-NUC:~/src$ 

What you're doing here is converting words from the "file" into command line arguments. The white space all gets removed. Your command ends up being

ssh A-WINDOWS-SERVER echo hello echo there

and that's exactly what you see.

If you want to pass multiple commands through the ssh, pass them via stdin, not via the command line.

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