How to export a function in Bourne shell?
No. The POSIX specification for export lacks the -f present in bash that allows one to export a function.
A (very verbose) workaround is to save your function to a file and source it in the child script.
script.sh:
#!/bin/sh --function_holder="$(cat <<'EOF' function_to_export() { printf '%s\n' "This function is being run in ${0}" }EOF)"function_file="$(mktemp)" || exit 1export function_fileprintf '%s\n' "$function_holder" > "$function_file". "$function_file"function_to_export./script2.shrm -- "$function_file"script2.sh:
#!/bin/sh --. "${function_file:?}"function_to_exportRunning script.sh from the terminal:
[user@hostname /tmp]$ ./script.shThis function is being run in ./script.shThis function is being run in ./script2.sh