# Copyright 2011 George Danchev <danchev@spnet.net>
# Copyright 2011 Thomas Schmitt <scdbackup@gmx.net>
# Licensed under GNU GPL version 2 or later

SELF=$(basename $0)
RELENG_XORRISO=0
KEEP=0
SIMULATE_FAILURE=0
CLEANUP=1
RELENG_PRINTED_HELP=0

START_DIR_DONT_CHANGE=`pwd`
GEN_DATA_DIR=releng_generated_data/${SELF}

#############################################
print_help() {
cat << EOF

Usage: $SELF -x path/to/xorriso [-k0|1] [-f0|1] [-c0|1] [-h]
                                              [-- ...test specific options...]
General options:
       -x  absolute or relative path to binary to be run.
       -k  keep selfgenerated data (values 0,1, default 0).
       -c  cleanup selfgenerated data kept from previous
           run and exit            (values 0,1, default 0).
       -f  simulate failure        (values 0,1, default 0).
       --  end of general options, begin of test specific options.
EOF
}

boldify() {
 if which tput >/dev/null 2>&1; then tput smso; fi
}

unboldify() {
 if which tput >/dev/null 2>&1; then tput rmso; fi
}

#############################################
cleanup() {
 if [ ${KEEP} -eq 0 -a ${CLEANUP} -eq 1 ]; then
   # safety net, just in case -> we want to be in the starting
   # directory before removing whatever self-generated stuff
   if [ -d "${GEN_DATA_DIR}" ]; then
       cd "${START_DIR_DONT_CHANGE}" || exit 2
       
       # Verify once again we are in the releng_generated_data directory
       # Check for both returned code of grep and returned matching string
       READ_CANON_EXISTS=`readlink -e "${GEN_DATA_DIR}"`
       DIR_NAME_GEN_DATA=`dirname "${READ_CANON_EXISTS}"`
       set +e
       RET_NON_EMPTY_STRING=`echo "${DIR_NAME_GEN_DATA}" | grep -P "\w+\/releng_generated_data$"`
       GREP_RET_GEN_DATA="$?"
       case "${GREP_RET_GEN_DATA}" in
            0)
	      if [ x"${RET_NON_EMPTY_STRING}" != x"" ]; then
                 # now call the nastiness
                 chmod +w -R ${GEN_DATA_DIR}
                 rm -rf ${GEN_DATA_DIR}
		 boldify
                 printf "${SELF}: Removed (self-generated) %s\n" ${GEN_DATA_DIR}
		 unboldify
	      else
                 printf "${SELF}: FAIL: Safety check for being in releng_generated_data directory.\n"
                 printf "${SELF}: FAIL: GREP returned empty string: ${RET_NON_EMPTY_STRING}.\n"
                 printf "${SELF}: FAIL: Skipped trying to remove ${GEN_DATA_DIR} directory. Exiting.\n"
	      fi
            ;;
	    *)
              printf "${SELF}: FAIL: Safety check for being in releng_generated_data directory.\n"
              printf "${SELF}: FAIL: GREP returned code: ${GREP_RET_GEN_DATA}.\n"
              printf "${SELF}: FAIL: Skipped trying to remove ${GEN_DATA_DIR} directory. Exiting.\n"
	      exit 30
	    ;;
       esac
   else
       printf "${SELF}: ${GEN_DATA_DIR} does not exist. Nothing to clean.\n"
   fi
 else
   boldify
   printf "${SELF}: Leaving (self-generated) %s\n" ${GEN_DATA_DIR}
   unboldify
 fi 
}

#############################################

no_getopts=1
if test "$no_getopts" = 1
then

next_is=
for i in "$@"
do
  if test "$next_is" = "ignore"
  then
       dummy=dummy
  elif test "$next_is" = "x"
  then
       RELENG_XORRISO="$i"
       next_is=
  elif test x"$i" = x"-x"
  then
       next_is="x"
  elif test x"$i" = x"-k" -o x"$i" = x"-k0"
  then
       KEEP=0
  elif test x"$i" = x"-k1"
  then
       KEEP=1
  elif test x"$i" = x"-c" -o x"$i" = x"-c0"
  then
       CLEANUP=0
  elif test x"$i" = x"-c1"
  then
       CLEANUP=1
  elif test x"$i" = x"-f" -o x"$i" = x"-f0"
  then
       SIMULATE_FAILURE=0
  elif test x"$i" = x"-f1"
  then
       SIMULATE_FAILURE=1
  elif test x"$i" = x"-h"
  then
       print_help
       RELENG_PRINTED_HELP=1
  elif test x"$i" = x"--"
  then 
       # Begin of private arguments for caller
       next_is="ignore"
  else
       echo >&2
       echo "Unknown general option: $i" >&2
       print_help
       exit 31
  fi
done

if test "$next_is" = x
then
       echo >&2
       echo "Option -x expects an argument (the path to the xorriso program)" >&2
       print_help
       exit 31
fi

# no_getopts = 1
else
# no_getopts != 1

while getopts "x:k:c:f:h" OPTION
do
    case $OPTION in
       x)
         RELENG_XORRISO=$OPTARG
         ;;
       k)
         KEEP=$OPTARG
         ;;
       c)
         CLEANUP=$OPTARG
	 cleanup
	 exit 0
         ;;
       f)
         SIMULATE_FAILURE=$OPTARG
         ;;
       h)
         print_help
         exit 0
         ;;
       *)
#         print_help
#         exit 31
         ;;
  esac
done

# no_getopts != 1
fi


# Each releng_ test should decide whether or not to check that
#if [ ! -x $RELENG_XORRISO ]; then
# print_help
# printf "\n${SELF}: -x  absolute or relative path to binary to be run.\n\n"
# exit 31
#fi

if [ x"$KEEP" != x"0" -a x"$KEEP" != x"1" ]; then
 print_help
 printf "\n${SELF}: -k  keep selfgenerated data.\n\n"
 exit 31
fi

if [ x"$CLEANUP" != x"0" -a x"$CLEANUP" != x"1" ]; then
 print_help
 printf "\n${SELF}: -c  cleanup selfgenerated data kept from previous run.\n\n"
 exit 31
fi


# <<< This cannot happen if $no_getopts = 1
if [ x"$SIMULATE_FAILURE" != x"0" -a x"$SIMULATE_FAILURE" != x"1" ]; then
 print_help
 printf "\n${SELF}: -f  simulate failure.\n\n"
 exit 31
fi