问题
Possible Duplicate:
Identifying received signal name in bash shell script
When using something like trap func_trap INT TERM EXIT with:
func_trap () {
...some commands...
}
Is there a way in the function block to detect which trap has called it?
Something like:
func_trap () {
if signal = INT; then
# do this
else
# do that
fi
}
Or do I need to write a separate function for each trap type that does something different? Is there a bash variable that holds the latest received signal?
Thanks in advance!
回答1:
No documentation hints of any argument or variable holding the signal that was trapped, so you'll have to write a function/trap statement for each trap you want to behave differently.
回答2:
You can implement your own trap function that automatically passes the signal to the function:
trap_with_arg() {
func="$1" ; shift
for sig ; do
trap "$func $sig" "$sig"
done
}
$ trap_with_arg func_trap INT TERM EXIT
The first argument to func_trap will be the name of the signal.
来源：https://stackoverflow.com/questions/2175647/is-it-possible-to-detect-which-trap-signal-in-bash