include/shell.sh

   1 var2file() {
   2         local var
   3         eval "var=\"\${$1}\""
   4         if [ -n "$var" ]; then echo "$var" > "$2"; fi
   5 }
   6
   7 isset() {
   8         local var
   9         eval "var=\"\${$1}\""
  10         [ -n "$var" ]
  11 }
  12
  13 trapret() {(
  14         local retvals="$1"; shift
  15         local cmd="$1"; shift
  16         for retval in $(echo $retvals); do
  17                 local trap_$retval=1
  18         done
  19         "$cmd" "$@" || {
  20                 local retval="$?"
  21                 eval "trapped=\${trap_$retval}"
  22                 [ -n "$trapped" ] || {
  23                         return $retval
  24                 }
  25         }
  26 )}
  27
  28 md5s() {
  29         cat "$@" | (
  30                 md5sum 2>/dev/null ||
  31                 md5
  32         ) | awk '{print $1}'
  33 }