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|
# pro-archman
# src/pro-archman.sh
# Main program file
#
# Copyright (C) 2013 Patrick McDermott
#
# This file is part of the ProteanOS Archive Manager.
#
# The ProteanOS Archive Manager is free software: you can redistribute
# it and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# The ProteanOS Archive Manager 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the ProteanOS Archive Manager. If not, see
# <http://www.gnu.org/licenses/>.
set -eu
# Constant global variables
LF='
'
OPTSTRING='hVvb:'
# Global variables
in_place=
builddir=
loading_cmd=
base_dir=
conf_incoming_channel=
conf_incoming_dir=
conf_pool_gc_delay=
conf_verbose=
conf_gzip=
conf_key=
lock=
exit_status=
_get_options()
{
local opt=
OPTIND=1
unset OPTARG
while getopts "${OPTSTRING}" opt; do
case "${opt}" in
'?')
return 1
;;
*)
eval "opt_${opt}=\"\${OPTARG:-true}\""
;;
esac
unset OPTARG
done
return 0
}
main()
{
local cmd=
if [ -f "$(dirname -- "${0}")/.builddirstamp" ]; then
in_place=true
builddir="$(dirname -- "${0}")"
else
in_place=false
builddir=''
fi
load_locale || return 1
if ! _get_options "${@}"; then
cmd_help_main 1>&2
return 1
fi
shift $((${OPTIND} - 1))
base_dir="${opt_b:-.}"
if ${opt_h:-false}; then
cmd='help'
elif ${opt_V:-false}; then
cmd='version'
elif [ ${#} -lt 1 ]; then
cmd_help_main 1>&2
return 1
else
cmd="${1}"
shift 1
fi
if run_cmd "${cmd}" "${@}"; then
return 0
else
return ${?}
fi
}
_lock()
{
mkdir -p -- "${base_dir}/.db"
lock="${base_dir}/.db/lock"
if ! (set -C; printf '%d\n' "${$}" >"${lock}") 2>/dev/null; then
error 2 "$(get_msg 'lock_fail')"
fi
}
_unlock()
{
rm -f -- "${lock}"
}
_handle_sig()
{
local sig="${1}"
shift 1
_unlock
if [ "x${exit_status:+set}" = 'xset' ]; then
exit ${exit_status}
else
exit $((128 + ${sig}))
fi
}
_init_sigs()
{
local i=
local sig=
# We need the signal *number* in the signal handler. The only portable
# and easy way to get the number of a named signal is to search for it
# as in the following loop hack.
i=0
while [ ${i} -lt 127 ]; do
i=$((${i} + 1))
sig="$(kill -l ${i} 2>/dev/null)" || continue
case "${sig}" in
'HUP' | 'INT' | 'QUIT' | 'ABRT' | 'ALRM' | 'TERM')
trap "_handle_sig ${i}" ${i}
;;
esac
done
}
_get_conf()
{
local old_dir=
# Set defaults.
conf_incoming_channel='dev'
conf_incoming_dir='../incoming'
conf_pool_gc_delay=86400
conf_verbose=false
conf_gzip=true
conf_key=''
eval "$(cat -- "${base_dir}/conf" 2>/dev/null || :)"
old_dir="$(pwd)"
cd -- "${base_dir}"
if [ -d "${conf_incoming_dir}" ]; then
conf_incoming_dir="$(cd -- "${conf_incoming_dir}" && pwd)"
fi
cd -- "${old_dir}"
case "${conf_pool_gc_delay}" in *[!0-9]* | '')
error 1 "$(get_msg 'conf_invalid')" 'conf_pool_gc_delay'
esac
case "${conf_verbose}" in
'false' | '0' | 'off' | 'no' | '') conf_verbose=false;;
*) conf_verbose=true;;
esac
case "${conf_gzip}" in
'false' | '0' | 'off' | 'no' | '') conf_gzip=false;;
*) conf_gzip=true;;
esac
return 0
}
init()
{
_init_sigs
_lock
_get_conf
}
fini()
{
update_feeds
collect_garbage
_unlock
}
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