getvar() { eval "echo \"\${$1}\"" } var2file() { local var eval "var=\"\${$1}\"" if [ -n "$var" ]; then echo "$var" > "$2"; fi } isset() { local var eval "var=\"\${$1}\"" [ -n "$var" ] } trapret() {( local retvals="$1"; shift local cmd="$1"; shift for retval in $(echo $retvals); do local trap_$retval=1 done "$cmd" "$@" || { local retval="$?" eval "trapped=\${trap_$retval}" [ -n "$trapped" ] || { return $retval } } )} md5s() { cat "$@" | ( md5sum 2>/dev/null || md5 ) | awk '{print $1}' } it'>
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