Here are some notes about shell traps:

syntax [edit section]

• 'trap' - show a list of active trap handlers
• 'trap -l' - show a list of possible signals to trap (doesn't include ERR and EXIT)
• 'trap "<handler command>" <signal> [<signal2>...]' - set trap handler to indicated command
• 'trap - <signal> [<signal2]' - reset trap handler to default

notes [edit section]

• with set -e, and an ERR handler set, the error handler runs, but the script still exits
  • when err_handler exits, the script does it's EXIT routine

• entering a function clears the ERR trap handler
  • fixable with "set -o errtrace"
• I can't seem to get traptest.sh to respond to SIGTERM