bin/setsig.sh

   1 #!/bin/sh
   2
   3 # These should be fairly static - we can make them dynamic if we have to
   4
   5 START="FFFC0"
   6 LEN="16"
   7
   8 STR_BEGIN=`dc -e "16 i FFFC0 p"`
   9 STR_END=`expr $STR_BEGIN + $LEN`
  10
  11 IN=$1
  12 SIG=$2
  13 OUT=$3
  14
  15 if [ -z "$IN" -o -z "$SIG" ]; then
  16         echo "usage:  ./setsig.sh <input> <sig> <output>"
  17         exit 1
  18 fi
  19
  20 if [ -z "$OUT" ]; then
  21         OUTPUT=/dev/stdout
  22 fi
  23
  24 dd if=$IN bs=$STR_BEGIN count=1 > $OUT 2>/dev/null
  25 echo -n "$SIG" >> $OUT
  26 dd if=$IN bs=$STR_END skip=1 >> $OUT 2>/dev/null