# return 1 stdin not present
# Example: printf "foo\nbar\n" | read_stdin
# Depends: GNU bash (version 5.1.16), GNU Coreutils 8.32 (cat)
# return 1 stdin not present
# Example: printf "foo\nbar\n" | read_stdin
# Depends: GNU bash (version 5.1.16), GNU Coreutils 8.32 (cat)