Shell Programming and Scripting

TRAPS


# ----------------------------------------------
 308 # Step #3: Trap CTRL+C, CTRL+Z and quit singles
 309 # ----------------------------------------------
 310 trap '' SIGINT SIGQUIT SIGTSTP
 311  



err_report() {
  31     echo "Error on line $1"
  32 }
  33
  34 trap 'err_report $LINENO' ERR




OFFENDING CODE 



do_hostname() {
 910   if [ "$INTERACTIVE" = True ]; then
 911     whiptail --msgbox "\
 912 Please note: RFCs mandate that a hostname's labels \
 913 may contain only the ASCII letters 'a' through 'z' (case-insensitive), 
 914 the digits '0' through '9', and the hyphen.
 915 Hostname labels cannot begin or end with a hyphen. 
 916 No other symbols, punctuation characters, or blank spaces are permitted.\
 917 " 20 70 1



TRAP output 



pi@pi:/usr/bin $ sudo raspi-config.debug_7.sh
trap: ERR: bad trap
trap: SIGINT: bad trap
/usr/bin/raspi-config.debug_7.sh: 913: /usr/bin/raspi-config.debug_7.sh: Syntax error: "(" unexpected (expecting "fi")