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|
if [ ! "$_SCRIPT_SUBR" ]; then _SCRIPT_SUBR=1
#
# Copyright (c) 2012 Devin Teske
# All Rights Reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
############################################################ INCLUDES
BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." script.subr
f_include $BSDCFG_SHARE/variable.subr
############################################################ GLOBALS
RESWORDS=
############################################################ FUNCTIONS
# f_resword_new $resword $function
#
# Create a new `reserved' word for scripting purposes. Reswords call pre-
# defined functions but differ from those functions in the following ways:
#
# + Reswords do not take arguments but instead get all their data from
# the environment variable namespace.
# + Unless noError is set (must be non-NULL), if calling the resword
# results in failure, the application will terminate prematurely.
# + noError is unset after each/every resword is called.
#
# Reswords should not be used in bsdconfig itself (hence the name `reserved
# word') but instead only in scripts loaded through f_script_load()).
#
f_resword_new()
{
local resword="$1" func="$2"
[ "$resword" ] || return $FAILURE
f_dprintf "script.subr: New resWord %s -> %s" "$resword" "$func"
eval $resword\(\){ f_dispatch $func $resword\; }
RESWORDS="$RESWORDS${RESWORDS:+ }$resword"
}
# f_dispatch $func [$resword]
#
# Wrapper function used by `reserved words' (reswords) to call other functions.
# If $noError is set and non-NULL, a failure result from $func is ignored,
# otherwise the application is prematurely terminated using f_die().
#
# NOTE: $noError is unset after every call.
#
f_dispatch()
{
local func="$1" resword="${2:-$1}"
f_dprintf "f_dispatch: calling resword \`%s'" "$resword"
eval $func
local retval=$? _ignore_this_error
f_getvar $VAR_NO_ERROR _ignore_this_error
[ $retval -eq $SUCCESS ] ||
[ "$_ignore_this_error" ] || f_die $retval \
"$msg_command_failed_rest_of_script_aborted" "$resword"
unset $VAR_NO_ERROR
}
# f_script_load [$file]
#
# Load a script (usually filled with reswords). If $file is missing or NULL,
# use one of the following instead (in order):
#
# $configFile
# install.cfg
# /stand/install.fg
# /tmp/install.cfg
#
# Unknown/unregistered reswords will generate sh(1) syntax errors but not cause
# premature termination.
#
# Returns success if a script was loaded and itself returned success.
#
f_script_load()
{
local script="$1" config_file retval=$SUCCESS
f_dprintf "f_script_load: script=[%s]" "$script"
if [ ! "$script" ]; then
f_getvar $VAR_CONFIG_FILE config_file
for script in \
$config_file \
install.cfg \
/stand/install.cfg \
/tmp/install.cfg \
; do
[ -e "$script" ] && break
done
fi
local old_interactive=
f_getvar $VAR_NONINTERACTIVE old_interactive # save a copy
# Hint to others that we're running from a script, should they care
setvar $VAR_NONINTERACTIVE yes
if [ "$script" = "-" ]; then
f_dprintf "f_script_load: Loading script from stdin"
eval "$( cat )"
retval=$?
else
f_dprintf "f_script_load: Loading script \`%s'" "$script"
if [ ! -e "$script" ]; then
f_show_msg "$msg_unable_to_open" "$script"
return $FAILURE
fi
. "$script"
retval=$?
fi
[ "$old_interactive" ] &&
setvar $VAR_NONINTERACTIVE "$old_interactive"
return $retval
}
############################################################ MAIN
#
# Reserved words meant for scripting
#
f_resword_new dumpVariables f_dump_variables
f_resword_new loadConfig f_script_load
f_dprintf "%s: Successfully loaded." script.subr
fi # ! $_SCRIPT_SUBR
|
