#!/bin/sh
###############################################################################
# WebSphere Application Client liberty launch script
#
# Copyright IBM Corp. 2011, 2014
# The source code for this program is not published or other-
# wise divested of its trade secrets, irrespective of what has
# been deposited with the U.S. Copyright Office.
# 
# ----------------------------------------------------------------------------
#
# To customize the use of this script (for example with /etc/init.d system 
# service managers), use the following environment variables:
#
# JAVA_HOME  - The java executable is found in ${JAVA_HOME}/bin
#
# JVM_ARGS   - A list of JVM command line options,
#              e.g. system properties or -X parameters
#              The value will be expanded by the shell (use quotes for spaces)
#
# LOG_DIR    - The log file directory
#              The default value is ${WLP_CLIENT_OUTPUT_DIR}/clientName/logs
#
# LOG_FILE   - The log file name
#              This log file is only used if the client is run in the
#              background via the start action. This is not supported in client.
#              The default value is console.log
#
# WLP_USER_DIR - The user/custom configuration directory used to store
#              shared and client-specific configuration. 
#              See README.TXT for details about shared resource locations.
#              A client's configuration is at ${WLP_USER_DIR}/clients/clientName
#              The default value is the usr directory in the install directory.
#
# WLP_CLIENT_OUTPUT_DIR - The directory containing output files for defined clients.
#              This directory must have both read and write permissions for
#              the user or users that start clients.
#              By default, a client's output logs and workarea are stored
#              in the ${WLP_USER_DIR}/clients/clientName directory
#              (alongside configuration and applications).
#              If this variable is set, the output logs and workarea 
#              would be stored in ${WLP_CLIENT_OUTPUT_DIR}/clientName.
#
# WLP_DEBUG_ADDRESS - The port to use when running the client in debug mode.
#              The default value is 7778.
#
# WLP_SKIP_UMASK -  Skip setting the umask value to allow the default value 
#                   to be used.
###############################################################################

##
## Determine the platform and absolute path of the installation directory.
##
case $OSTYPE in
  cygwin)
    uname=CYGWIN_NT

    # Determine the installation directory without forking if possible.  Use
    # eval to hide ${var//find/replace}, ${var%suffix}, and ${var:first:length}
    # syntaxes from shells that can't parse them.
    eval '
      # cd to the install directory.
      savePWD=$PWD
      script=${0//\\/\/}
      unset CDPATH; cd "${script%/*}"/..

      # Convert the install (current working) directory to a Windows path.
      case $PWD in
        /cygdrive/?/*)
          # Use ${var:first:length} to avoid forking for cygpath.
          WLP_INSTALL_DIR=${PWD:10:1}:${PWD:11}
          ;;
        *)
          WLP_INSTALL_DIR=`cygpath -ma .`
      esac

      cd "$savePWD"
    '
    ;;

  *)
    uname=`uname`

    case $uname in
      CYGWIN_*)
        WLP_INSTALL_DIR=`cygpath -ma "${0}"/../..`
        ;;

      *)
        dirname=`dirname "$0"`
        WLP_INSTALL_DIR=`unset CDPATH; cd "$dirname/.." && pwd`
    esac
esac

##
## Platform specific setup
##
UMASK_O='umask o='
tryShellExtensions=true
shareclassesCacheDirPerm=true
defaultFileEncoding=
newline='
'
nativeEBCDIC=false

case ${uname} in
  CYGWIN_*)
    # java.exe is a non-Cygwin process, so we need to pass -W.
    shareclassesCacheDirPerm=false
    ;;

  OS/390)
    defaultFileEncoding=iso8859-1
    nativeEBCDIC=true         # Auto-convert client.env/client.jvm.options from ASCII-to-EBCDIC, if necessary.
    _BPXK_WLM_PROPAGATE=NO    # Prevent WLM enclave propagation to spawned processes
    _EDC_PTHREAD_YIELD=-2     # Disable sleeps inside of pthread_yield
    JAVA_PROPAGATE=NO         # Prevent WLM enclave propagation to new threads
    export _BPXK_WLM_PROPAGATE _EDC_PTHREAD_YIELD JAVA_PROPAGATE

    WLP_NLS_PATH="${WLP_INSTALL_DIR}/lib/native/zos/s390x/nls/%N.cat"
    if [ ${NLSPATH} ]
    then          
      NLSPATH="${WLP_NLS_PATH}:${NLSPATH}" 
    else
      NLSPATH="${WLP_NLS_PATH}"
    fi
    ;;

esac

##
## safeEcho: Portable echo that can handle backslashes and leading dashes.
safeEcho()
{
  cat <<EOF
$*
EOF
}

# Define escapeForEval functions using ${var//find/replace} and ${var#suffix}
# if possible since those constructs are significantly faster than safeEcho+sed
# since they avoid forks.  Use eval (to hide the syntax from shells that don't
# support them) in a subshell (to avoid exiting the shell process on error) to
# test if the shell has support.
if ${tryShellExtensions} && (eval 'true ${1//b/c} ${1#*=}') 2> /dev/null; then
  # The shell has support.  Define the functions using eval, again to hide the
  # syntax from shells that don't support it.
  eval "
    escapeForEval()
    {
      escapeForEvalResult=\\'\${1//\\'/\\'\\\"\\'\\\"\\'}\\'
    }

    extractValueAndEscapeForEval()
    {
      escapeForEval \"\${1#*=}\"
    }

    substitutePrefixVar()
    {
      case \$1 in
      @\$2@*) substitutePrefixVarResult=\$3\${1#@\$2@};;
      *) substitutePrefixVarResult=\$1
      esac
    }
  "
else
  ##
  ## escapeForEval: Escape the first parameter to be safe for use in eval,
  ##                and set escapeForEvalResult with the result.
  ##
  escapeForEval() 
  {
    escapeForEvalResult=\'`safeEcho "$1" | sed s/\'/\'\"\'\"\'/g`\'
  }

  ##
  ## extractValueAndEscapeForEval: Extract the value of a var=value string,
  ##                               and set escapeForEvalResult with the result.
  ##
  extractValueAndEscapeForEval()
  {
    escapeForEvalResult=\'`safeEcho "$1" | sed -e 's/[^=]*=//' -e s/\'/\'\"\'\"\'/g`\'
  }

  ##
  ## substitutePrefixVar: If $1 has a prefix @$2@, set substitutePrefixVarResult
  ##                      to $1 with the prefix replaced by $3.  Otherwise, set
  ##                      to $1.
  substitutePrefixVar()
  {
    case $1 in
    @$2@*) substitutePrefixVarResult=$3`safeEcho "$1" | sed -e "s/^@$2@//"`;;
    *) substitutePrefixVarResult=$1
    esac
  }
fi

##
## Quote ${WLP_INSTALL_DIR} for eval.
##
escapeForEval "${WLP_INSTALL_DIR}"
WLP_INSTALL_DIR_QUOTED=${escapeForEvalResult}
READ_ETC=1

##
## Consume script parameters: 
##   action is required/positional, 
##   clientName is optional, --options following
##
if [ $# -lt 1 ]
then
  ACTION=help:usage
else
  ACTION=$1
  shift #consume
  if [ $# -ge 1 ]
  then
    # Only use if it isn't something that looks like an option
    case $1 in
    -*);;
    *)
      CLIENT_NAME=$1
      shift #consume
    esac
  fi
fi

##
## Set client name and directory
##
if [ -z "$CLIENT_NAME" ]
then
  CLIENT_NAME=defaultClient
fi


##
## Set JAVA_AGENT_QUOTED if WLP_SKIP_BOOTSTRAP_AGENT is unset.
##
JAVA_AGENT_QUOTED=-javaagent:${WLP_INSTALL_DIR_QUOTED}/bin/tools/ws-javaagent.jar
if [ -n "${WLP_SKIP_BOOTSTRAP_AGENT}" ]; then
  JAVA_AGENT_QUOTED=
fi

##
## createClient: Function to launch client create
##
createClient()
{
  javaCmd "${CLIENT_NAME}" --create "$@"
  rc=$?
  return $rc
}

##
## mkdirs: Create a directory and all parent directories, if necessary.
##
mkdirs()
{
  if [ ! -d "$1" ]; then
    mkdir -p "$1"
  fi
}

##
## checkClient: Check for created/existing client.  If it does not, issue an
##              error message if the first argument is true, and then exit the
##              script regardless.
checkClient()
{
  if [ -d "${CLIENT_CONFIG_DIR}" ] || [ "defaultClient" = "${CLIENT_NAME}" ]
  then
    return 0
  fi

  if $1
  then
    javaCmd --message:info.clientNotExist "${CLIENT_NAME}"
    rc=$?
    if [ $rc = 0 ]
    then
      rc=1
    fi
  else
    rc=1
  fi

  return $rc
}

##
## installEnv: Set variables for a non-client or nonexistent client command.
installEnv()
{
  readClientEnv "${WLP_INSTALL_DIR}/etc/client.env"
  installEnvDefaults
  clientEnvDefaults
}

##
## installEnvDefaults: Set variable defaults for a non-client or nonexistent
##                     client command.
installEnvDefaults()
{
  readClientEnv "${WLP_INSTALL_DIR}/java/java.env"
  readClientEnv "${WLP_INSTALL_DIR}/etc/default.env"

  if [ -z "${WLP_USER_DIR}" ]
  then
    if [ -z "${WLP_DEFAULT_USER_DIR}" ]
    then
      WLP_DEFAULT_USER_DIR=${WLP_INSTALL_DIR}/usr
    fi
    WLP_USER_DIR=${WLP_DEFAULT_USER_DIR}
  fi

  if [ -z "${WLP_CLIENT_OUTPUT_DIR}" ]
  then
    if [ -z "${WLP_DEFAULT_OUTPUT_DIR}" ]
    then
      WLP_DEFAULT_OUTPUT_DIR=${WLP_USER_DIR}/clients
    fi
    WLP_CLIENT_OUTPUT_DIR=${WLP_DEFAULT_OUTPUT_DIR}
  fi

  CLIENT_CONFIG_DIR=${WLP_USER_DIR}/clients/${CLIENT_NAME}  
  
  export WLP_USER_DIR
  export WLP_CLIENT_OUTPUT_DIR
}

##
## clientEnvDefaults: Set defaults for client variables.
clientEnvDefaults()
{
  CLIENT_OUTPUT_DIR=${WLP_CLIENT_OUTPUT_DIR}/${CLIENT_NAME}

  # Unset set/tested variables to prevent collisions with nested process invocations
  if [ -z "$LOG_DIR" ]
  then
    X_LOG_DIR=${CLIENT_OUTPUT_DIR}/logs
  else
    X_LOG_DIR=${LOG_DIR}
    unset LOG_DIR
  fi
  export X_LOG_DIR

  if [ -z "$LOG_FILE" ]
  then
    X_LOG_FILE=console.log
  else
    X_LOG_FILE=${LOG_FILE}
    unset LOG_FILE
  fi
  export X_LOG_FILE
  
  if [ -z "${JAVA_HOME}" ]
  then
    if [ -z "${JRE_HOME}" ]
    then
      if [ -z "${WLP_DEFAULT_JAVA_HOME}" ]
      then
        # Use whatever java is on the path
        JAVA_CMD=java
      else
        substitutePrefixVar "${WLP_DEFAULT_JAVA_HOME}" WLP_INSTALL_DIR "${WLP_INSTALL_DIR}"
        JAVA_HOME=${substitutePrefixVarResult}
        JAVA_CMD=${JAVA_HOME}/bin/java
      fi
    else
      JAVA_HOME=${JRE_HOME}
      JAVA_CMD=${JRE_HOME}/bin/java
    fi
  else
    if [ -f "${JAVA_HOME}/jre/bin/java" ]
    then
        JAVA_CMD=${JAVA_HOME}/jre/bin/java
    else
        JAVA_CMD=${JAVA_HOME}/bin/java
    fi
  fi

  # Set a default file encoding if needed
  if [ -n "$defaultFileEncoding" ]; then
    if ! expr "${JVM_OPTIONS_QUOTED} ${JVM_ARGS}" : '.*\(-Dfile\.encoding\=[^[:space:]]\)' > /dev/null; then
      JVM_ARGS="${JVM_ARGS} -Dfile.encoding=$defaultFileEncoding"
    fi
  fi
  
  clientUmask
}

##
## clientEnv: Set variables for an existing client.
clientEnv()
{
  readClientEnv "${WLP_INSTALL_DIR}/etc/client.env"
  installEnvDefaults

  readClientEnv "${CLIENT_CONFIG_DIR}/client.env"
  clientEnvDefaults
}

##
## clientEnvAndJVMOptions: Read client.env files and set environment variables.
##                         Read client.jvm.options file into ${JVM_OPTIONS_QUOTED}
clientEnvAndJVMOptions()
{
  clientEnv

  # Allow Headless mode for running AWT application.
  JVM_OPTIONS_QUOTED=-Djava.awt.headless=true

  rc=0
  mergeJVMOptions "${CLIENT_CONFIG_DIR}/client.jvm.options"
  if [ $rc -ne 0 ]; then
    return $rc
  fi
  
  # If ${CLIENT_CONFIG_DIR}/client.jvm.options did not exist, then
  # try to read ${WLP_INSTALL_DIR}/etc/client.jvm.options.
  if [ $READ_ETC -eq 1 ]; then
    mergeJVMOptions "${WLP_INSTALL_DIR}/etc/client.jvm.options"
  fi
  
  JPMS_MODULE_FILE_LOCATION="${JAVA_HOME}/lib/modules"
  if [ -z "${JAVA_HOME}" ]; then
    JPMS_MODULE_FILE_LOCATION=$(dirname $(dirname $(which java)))/lib/modules
  fi

  # If we are running on Java 9, apply Liberty's built-in java 9 options  
  if [ -f "${JPMS_MODULE_FILE_LOCATION}" ]; then
    mergeJVMOptions "${WLP_INSTALL_DIR}/lib/platform/java/java9.options"
  fi

  return $rc
}

mergeJVMOptions()
{
    jvmOptions=$1
     
    if [ -f "$jvmOptions" ]; then
      READ_ETC=0
      saveIFS=$IFS
      IFS=$newline
      
      for option in `readNativeFile "$jvmOptions" '[#-]' | tr -d '\r'`; do
        if [ -n "$option" ]; then
          case $option in
          \#*);;
          *)
            escapeForEval "${option}"
            JVM_OPTIONS_QUOTED="${JVM_OPTIONS_QUOTED} ${escapeForEvalResult}"
            ;;
          esac
        fi
      done
      IFS=$saveIFS
    fi
}

##
## readClientEnv: Read client.env file and export environment variables.
readClientEnv()
{
  if [ -f "$1" ]; then
    saveIFS=$IFS
    IFS=$newline
    for line in `readNativeFile "$1" '[#_A-Za-z=]' | tr -d '\r'`; do
      case $line in
      \#*);;
      *=*)
        # Only accept alphanumeric variable names to avoid eval complexities.
        if var=`safeEcho "$line" | sed -e 's/^\([a-zA-Z0-9_][a-zA-Z0-9_]*\)=.*/\1/'`; then
          extractValueAndEscapeForEval "${line}"
          eval "${var}=${escapeForEvalResult}; export ${var}"
        fi
      esac
    done
    IFS=$saveIFS
  fi
}

##
## Detects the code page of the file and converts to EBCDIC,
## if necessary, before cat'ing.
##
## Only applicable if running in a native EBCDIC environment (z/OS).
##
## $1 the file name
## $2 pattern denoting the expected first char of file
readNativeFile() {
  if ${nativeEBCDIC}; then
    # ASCII 'm' overlaps with EBCDIC '_', so strip it out before detecting the codepage.
    # Note: cat used here to handle ASCII-tagged files.
    filecontents=`cat "$1" | iconv -f ISO8859-1 -t IBM-1047 | tr -d 'm\r\n'`
    case $filecontents in
      $2*) iconv -f ISO8859-1 -t IBM-1047 "$1" ;;  # ASCII file.
      *) cat "$1"                # EBCDIC file or ASCII-tagged file.
    esac
  else
    cat "$1"
  fi
}

##
## clientWorkingDirectory: Change the working directory to ${CLIENT_OUTPUT_DIR}
clientWorkingDirectory()
{
  # Change the working directory to ${CLIENT_OUTPUT_DIR}.
  mkdirs "${CLIENT_OUTPUT_DIR}"
  cd "${CLIENT_OUTPUT_DIR}"
}

## set the umask value to remove all permissions for the Other category
## but leave existing values for User and Group unaltered
##
## If the WLP_SKIP_UMASK variable is set then do not set umask
clientUmask()
{
  if [ -z "${WLP_SKIP_UMASK}" ]; then
    $UMASK_O
  fi
}

##
## javaCmd: Execute a java-based command.  Arguments are:
##
##   "$@"
##     All command-line arguments to be passed to the command
##
## The following variables must be set:
##   ${JAVA_CMD} - the java command
##   ${JAVA_DEBUG} - JVM options to enable debug, or empty
##   ${JAVA_AGENT_QUOTED} - The -javaagent argument quoted for eval
##   ${JVM_OPTIONS_QUOTED} - jvm.options quoted for eval
##   ${WLP_INSTALL_DIR_QUOTED} - ${WLP_INSTALL_DIR} quoted for eval
javaCmd()
{
  # Set all the parameters for the java command.  We use eval so that each line
  # in client.jvm.options is treated as a distinct argument.
  eval "set -- ${JAVA_AGENT_QUOTED} ${JVM_OPTIONS_QUOTED} ${JAVA_DEBUG} ${JVM_ARGS} -jar ${WLP_INSTALL_DIR_QUOTED}/bin/tools/ws-client.jar "'"$@"'
  ARGS="$@"

  # Do not add extra logic after the commands without preserving $?
  "${JAVA_CMD}" "$@"
}

##
## clientCmd: Launch a client process.
##
##
clientCmd()
{
  X_CMD="${JAVA_CMD} ${ARGS}"
  export X_CMD

  javaCmd "${CLIENT_NAME}" "$@"
  rc=$?

  return $rc
}

JAVA_DEBUG=
JVM_OPTIONS_QUOTED=
INVOKED="$0"
export INVOKED

case "$ACTION" in

  # Start the client in the foreground
  run | debug)
    if clientEnvAndJVMOptions
    then
      :
    else
      exit $?
    fi

    if checkClient true
    then
      if [ "${ACTION}" = "debug" ]
      then
        if [ -z "${WLP_DEBUG_ADDRESS}" ]
        then
          WLP_DEBUG_ADDRESS=7778
        fi
        JAVA_DEBUG="-Dwas.debug.mode=true -Dcom.ibm.websphere.ras.inject.at.transform=true -Dsun.reflect.noInflation=true -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=${WLP_DEBUG_ADDRESS}"
      fi

      clientWorkingDirectory
      clientCmd "$@"
      exit $?
    else
      exit 2
    fi
  ;;
   
  create)
    installEnv
    createClient "$@"
    exit $rc
  ;;

  # Package up the runtime and target client configuration
  package)
    clientEnv
    # Check to see if the client exists
    if checkClient true
    then
      javaCmd "${CLIENT_NAME}" --package "$@" 
      exit $?
    else
      exit 2
    fi    
  ;;
  
  help)
    installEnv
    javaCmd --help "${CLIENT_NAME}"
  ;;  

  help:usage)
    installEnv
    javaCmd --help:usage
  ;;
  
  *)
    installEnv
    javaCmd --help:actions:${ACTION}
  ;;
esac

exit 0