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#!/bin/sh
# (C) 2008 Gluster Inc. <http://www.gluster.com>
# 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#   
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#   
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free
# Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301 USA



_init ()
{
    # log level definitions
    LOG_NONE=NONE;
    LOG_CRITICAL=CRITICAL;
    LOG_ERROR=ERROR;
    LOG_WARNING=WARNING;
    LOG_NORMAL=NORMAL;
    LOG_DEBUG=DEBUG;

    # set default log level to ERROR
    log_level=$LOG_NORMAL;
}

start_glusterfs ()
{
    prefix="@prefix@";
    exec_prefix=@exec_prefix@;
    cmd_line=$(echo "@sbindir@/glusterfs");
    
    if [ -n "$log_level_str" ]; then
	case "$log_level_str" in
	    "ERROR")
		log_level=$LOG_ERROR;
		;;
            "NORMAL")
                log_level=$LOG_NORMAL;
                ;;
	    "DEBUG")
		log_level=$LOG_DEBUG;
		;;
	    "CRITICAL")
		log_level=$LOG_CRITICAL;
		;;
	    "WARNING")
		log_level=$LOG_WARNING;
		;;
	    "NONE")
		log_level=$LOG_NONE;
		;;
	    *)
		echo "invalid log level $log_level_str, using NORMAL";
		log_level=$LOG_NORMAL;
		;;
	esac
    fi
    cmd_line=$(echo "$cmd_line --log-level=$log_level");
    
    if [ -n "$log_file" ]; then
	cmd_line=$(echo "$cmd_line --log-file=$log_file");
    fi

    if [ -n "$volfile_check" ]; then
	cmd_line=$(echo "$cmd_line --volfile-check");
    fi

    if [ -n "$direct_io_mode" ]; then
	cmd_line=$(echo "$cmd_line --disable-direct-io-mode");
    fi
    
    if [ -z "$volfile_loc" ]; then
	if [ -n "$transport" ]; then 
	    cmd_line=$(echo "$cmd_line \
--volfile-server=$server_ip \
--volfile-server-port=$server_port \
--volfile-server-transport=$transport");
	else
	    cmd_line=$(echo "$cmd_line \
--volfile-server=$server_ip \
--volfile-server-port=$server_port");
	fi
    else
	cmd_line=$(echo "$cmd_line --volfile=$volfile_loc");
    fi

    if [ -n "$volume_name" ]; then
        cmd_line=$(echo "$cmd_line --volume-name=$volume_name");
    fi
    
    if [ -n "$volume_id" ]; then
        cmd_line=$(echo "$cmd_line --volfile-id=$volume_id");
    fi

    cmd_line=$(echo "$cmd_line $mount_point");
    exec $cmd_line;
}


main ()
{
    
    new_log_level=""
    log_file=""
    transport=""
    direct_io_mode=""
    volume_name=""
    new_fs_options=""
    volfile_check=""

    while getopts o: opt; do
	case "$opt" in
	    o) 
		options=$(echo $OPTARG | sed -n 's/.*\-o[ ]*\([^ ]*\).*/\1/p');
		[ -z $new_log_level ] && {
		    new_log_level=$(echo "$options" | sed -n 's/.*log-level=\([^,]*\).*/\1/p');
		}
		
		[ -z $log_file ] && {
		    log_file=$(echo "$options" | sed -n 's/.*log-file=\([^,]*\).*/\1/p');
		}
		
		[ -z $transport ] && {
		    transport=$(echo "$options" | sed -n 's/.*transport=\([^,]*\).*/\1/p');
		}
		
		[ -z $direct_io_mode ] && {
		    direct_io_mode=$(echo "$options" | sed -n 's/.*direct-io-mode=\([^,]*\).*/\1/p');
		}
		
		[ -z $volfile_check ] && {
		    volfile_check=$(echo "$options" | sed -n 's/.*volfile-check=\([^,]*\).*/\1/p');
		}
		
		[ -z $volume_name ] && {
		    volume_name=$(echo "$options" | sed -n 's/.*volume-name=\([^,]*\).*/\1/p');
		}

		[ -z $volume_id ] && {
		    volume_id=$(echo "$options" | sed -n 's/.*volume-id=\([^,]*\).*/\1/p');
		}

		this_option=$(echo "$options" | sed -e 's/[,]*log-file=[^,]*//' \
		    -e 's/[,]*log-level=[^,]*//' \
		    -e 's/[,]*volume-name=[^,]*//' \
		    -e 's/[,]*volfile-check=[^,]*//' \
		    -e 's/[,]*direct-io-mode=[^,]*//' \
		    -e 's/[,]*transport=[^,]*//' \
		    -e 's/[,]*volume-id=[^,]*//');
		new_fs_options="$new_fs_options $this_option";		
		;;
	esac
    done

    [ -n "$new_log_level" ] && {
	log_level_str="$new_log_level";
    }

    # TODO: use getopt. This is very much darwin specific
    volfile_loc="$1";
    while [ "$volfile_loc" == "-o" ] ; do
	shift ;
	shift ;
	volfile_loc="$1";
    done
    
    [ -r "$volfile_loc" ] || {
	server_ip=$(echo "$volfile_loc" | sed -n 's/\([^\:]*\).*/\1/p');
	server_port=$(echo "$volfile_loc" | sed -n 's/.*:\([^ ]*\).*/\1/p');
	[ -n "$server_port" ] || {
	    server_port="6996";
	}

	volfile_loc="";
    }
    # following line is product of love towards sed
    # $2=$(echo "$@" | sed -n 's/[^ ]* \([^ ]*\).*/\1/p');
    
    mount_point="$2";

    fs_options=$(echo "$fs_options,$new_fs_options");
    
    start_glusterfs;
}

_init "$@" && main "$@";