Show signal names from Sig* lines in Linux's /proc/$PID/status

siginfo

#!/bin/bash

pid=${1:-$PPID}

signals="$(trap -l)"

declare -A SIG
for s in ${signals//') '/=}
do
    i=${s%%=*}
    n=${s#*=}
    [[ $n = *[-+]* ]] && continue
    SIG["$n"]="$i"
    NUM[$i]="$n"
done

grep ^Sig /proc/$pid/status |
while read phase mask
do
    echo "$phase $mask $( for s in ${!NUM[@]} ; do (( 0x$mask & ( 1 << (s-1) ) )) && echo "${NUM[s]}" ; done )"
done