profile

• login
  • /etc/profile
  • Bourne compatible shells - ~/.profile, /etc/profile.d/*
  • bash - ~/.bash_profile
  • zsh - /etc/zprofile, ~/.zprofile for zsh
  • csh - /etc/csh.login, ~/.login
• non-login
  • /etc/bashrc
  • ~/.bashrc
• interactive
  • /etc/profile
  • ~/.profile
  • /etc/bashrc
  • /etc/bash.bashrc
• non-interactive
  • /etc/bashrc
  • /etc/bash.bashrc

# non-interactive login shell
echo $- | bash -lx

# interactive login shell
tty -s

• bash
  • login
    • --noprofile
    • /etc/profile
    • ~/.bash_profile
      • if [ -f ~/.bashrc ]; then . ~/.bashrc; fi
    • ~/.bash_login
    • ~/.profile
    • ~/.bash_logout
  • non-login
    • --norc, --rcfile
    • ~/.bashrc
  • non-interactive
    • BASH_ENV
      • if [ -n "$BASH_ENV" ]; then . "$BASH_ENV"; fi
  • sh
    • /etc/profile
    • ~/.profile
    • ENV
• https://www.gnu.org/software/bash/manual/html_node/Bash-Startup-Files.html

macOS

/etc/profile

if [ -x /usr/libexec/path_helper ]; then
  eval $(/usr/libexec/path_helper -s)
fi

if [ "${BASH-no}" != "no" ]; then
  [ -r /etc/bashrc ] && . /etc/bashrc
fi

# System-wide .bashrc file for interactive bash(1) shells.
if [ -z "$PS1" ]; then
   return
fi

PS1='\h:\W \u\$ '
# Make bash check its window size after a process completes
shopt -s checkwinsize

[ -r "/etc/bashrc_$TERM_PROGRAM" ] && . "/etc/bashrc_$TERM_PROGRAM"

• TERM_PROGRAM
  • iTerm.app
  • Apple_Terminal

non-interactive

[[ $- != *i* ]]

[ -z "$PS1" ]