# $Id: 20x11-common_process-args 305 2005-07-03 18:51:43Z dnusinow $

# This file is sourced by Xsession(5), not executed.

# read OPTIONFILE
OPTIONS=$(cat "$OPTIONFILE") || true

has_option() {
  if [ "${OPTIONS#*
$1}" != "$OPTIONS" ]; then
    return 0
  else
    return 1
  fi
}

# Determine how many arguments were provided.
case $# in
  0)
    # No arguments given; use default behavior.
    ;;
  1)
    # One argument given; see what it was.
    case "$1" in
      failsafe)
        # Failsafe session was requested.
        if has_option allow-failsafe; then
          if [ -e /usr/bin/x-terminal-emulator ]; then
            if [ -x /usr/bin/x-terminal-emulator ]; then
              exec x-terminal-emulator -geometry +1+1
            else
              # fatal error
              errormsg "unable to launch failsafe X session ---" \
                       "x-terminal-emulator not executable; aborting."
            fi
          else
            # fatal error
            errormsg "unable to launch failsafe X session ---" \
                     "x-terminal-emulator not found; aborting."
          fi
        fi
        ;;
      default)
        # Default behavior was requested.
        ;;
      *)
        # Specific program was requested.
        STARTUP_FULL_PATH=$(/usr/bin/which "$1" || true)
        if [ -n "$STARTUP_FULL_PATH" ] && [ -e "$STARTUP_FULL_PATH" ]; then
          if [ -x "$STARTUP_FULL_PATH" ]; then
            STARTUP="$1"
          else
            message "unable to launch \"$1\" X session ---" \
                    "\"$1\" not executable; falling back to default session."
          fi
        else
          message "unable to launch \"$1\" X session ---" \
                  "\"$1\" not found; falling back to default session."
        fi
        ;;
    esac
    ;;
  *)
    # More than one argument given; we don't know what to do.
    message "unsupported number of arguments ($#); falling back to default" \
            "session."
    ;;
esac

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