Originally posted by: Roald_Dupuis

Using sed for a direct stdin treatment of data, I expect that a line is treated after the enter. This is what happens when I test on CygWin or Linux but on my AIX, a second new line is needed to treat the line. I tried with the -u flag to avoid buffer latency without modification in behaviour. Is there an option or parameter to let the POSIX AIX sed work like on other OSs?

Example:

sed -u '=;l;s/foo/bar/'
like my foo            (enter)
but not the lazy dog   (enter)
1                      (stdout)
like my foo$           (stdout)
like my bar            (stdout)