coda_conf_functions

# -*-Shell-script-*-
#
# coda_conf_functions
#  This file contains functions to be used to parse a coda component
#  config file.
#
#  Currently parses
#   CODA_COMPONENT_TABLE
#  Provides variables
#   CODA_COMPONENT_NAME
#   CODA_COMPONENT_OPTION
#   CODA_HOSTMAME_LIST
#
#

if [ -z $CODA ]; then
    echo "ERROR: CODA environment variable not defined!"
    exit -1
fi

if [ -z $CODA_COMPONENT_TABLE ]; then
    echo "ERROR: CODA_COMPONENT_TABLE environment variable not defined!"
    exit -1
fi

# check for the existance of the config CODA_COMPONENT_TABLE
if [ ! -f $CODA_COMPONENT_TABLE ]; then
    echo "ERROR: CODA_COMPONENT_TABLE not found!"
    exit -1
fi

#
# codaconf_get_component_name hostname type
#
#   return the component name
#
codaconf_get_component_name() {
    local component_hostname=$1
    local component_type=$2
    local component_name=

    CODA_COMPONENT_NAME=
    component_name=$(sed -n -r \
			 "s/^$component_hostname\s+$component_type\s+(\S*).*$/\1/p" \
			 $CODA_COMPONENT_TABLE)

    if [ -n "$component_name" ]; then
	CODA_COMPONENT_NAME=$component_name
	return 1
    fi

    echo ERROR: Component Name not found for hostname=$component_hostname, type=$component_type
    return 0

}

#
# codaconf_get_name_option hostname name
#
#   return the component name's option
#
codaconf_get_name_option() {
    local component_hostname=$1
    local component_name=$2
    local component_option=

    CODA_COMPONENT_OPTION=
    component_option=$(sed -n -r \
			 "s/^$component_hostname\s+\S+\s+$component_name\s+(.*)$/\1/p" \
			 $CODA_COMPONENT_TABLE)

    if [ -n "$component_option" ]; then
	CODA_COMPONENT_OPTION=$component_option
	return 1
    fi

#    echo ERROR: Component Option not found for hostname=$component_hostname, name=$component_name
    return 0

}

#
# coda_conf_get_component_list type
#
#   return a list (array) of hostnames matching type
#
coda_conf_get_component_list() {
    local component_type=$1
    local hostname_list=

    CODA_HOSTMAME_LIST=
    hostname_list=$(sed -n -r \
			 "s/^(\S+)\s+$component_type\s+.*$/\1/p" \
			 $CODA_COMPONENT_TABLE)

    if [ -n "$hostname_list" ]; then
	CODA_HOSTNAME_LIST=($hostname_list)
	return 1
    fi

#    echo ERROR: Hostnames not found for type=$component_type
    return 0

}