commands if any of
signals is received. Each
signal can be a signal name or number.
Common signals include 0, 1, 2, and 15. Multiple commands should be
quoted as a group and separated by semicolons internally. If
commands is the null string (e.g., trap “”
signals is ignored by the shell. If
commands is omitted entirely, reset
processing of specified signals to the default action. If both
signals are omitted, list current trap
assignments. See the examples at the end of this entry and under
List signal names and numbers.
Used with no
commandsto print the trap commands associated with each
signal, or all signals if none is specified.
Signals are listed along with what triggers them.
Exit from shell (usually when shell script finishes).
Hang up (usually logout).
Interrupt (usually through Ctrl-C).
Reference to invalid memory.
Write to a pipe without a process to read it.
Software termination (usually via kill).
Termination of child process.
Continue (if stopped).
Process suspended (usually through Ctrl-Z).
Background process has tty input.
Background process has tty output.
I/O possible on a channel.
trap "" 2Ignore signal 2 (interrupts)
trap 2Obey interrupts again
$tmp file ...