bash - How to set a conditional newline in PS1? -

bash - How to set a conditional newline in PS1? -

i trying set ps1 prints out right after login, preceded newline later.

suppose export ps1="\h:\w \u\$ ", first time (i.e., right after login) get:

hostname:~ username$

i’ve been trying in ~/.bashrc:

function __ps1_newline_login { if [[ -n "${ps1_newline_login-}" ]]; ps1_newline_login=true else printf '\n' fi } export ps1="\$(__ps1_newline_login)\h:\w \u\$ “

expecting get:

# <empty line> hostname:~ username$

a finish illustration the origin be:

hostname:~ username$ ls `# notice: no empty line desired above!` desktop documents hostname:~ username$

try following:

function __ps1_newline_login { if [[ -z "${ps1_newline_login}" ]]; ps1_newline_login=true else printf '\n' fi } prompt_command='__ps1_newline_login' export ps1="\h:\w \u\$ "

explanation:

prompt_command special bash variable executed every time before prompt set. you need utilize -z flag check if length of string 0.

bash shell ps1