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moonfire-nvr/scripts/script-functions.sh

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#
# This file is part of Moonfire NVR, a security camera network video recorder.
# Copyright (C) 2016-2017 Scott Lamb <slamb@slamb.org>
#
# This program 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.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the
# OpenSSL library under certain conditions as described in each
# individual source file, and distribute linked combinations including
# the two.
#
# You must obey the GNU General Public License in all respects for all
# of the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do
# so, delete this exception statement from your version. If you delete
# this exception statement from all source files in the program, then
# also delete it here.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
if [ -z "$BASH_VERSION" ]; then
echo "Script must run using bash (/bin/bash), not dash (/bin/sh)."
exit 1
fi
# Useful constants
#
NODE_MIN_VERSION="8"
YARN_MIN_VERSION="1.0"
CARGO_MIN_VERSION="0.2"
RUSTC_MIN_VERSION="1.17"
FFMPEG_MIN_VERSION="55.1.101"
FFMPEG_RELEASE_VERSION="3.4"
normalizeDirPath()
{
echo "$( cd -P "$1" && pwd )"
}
resolvePath()
{
local d="$1"
while [ -h "$d" ]; do # resolve $d until file no longer a symlink
DIR="$( cd -P "$( dirname "$d" )" && pwd )"
d="$(readlink "$d")"
# if $d was rel symlink, resolve relative to path of symlink
[[ "$d" != /* ]] && ="$DIR/$d"
done
echo "$d"
}
functionsInit()
{
local p="$(resolvePath "${BASH_SOURCE[0]}")"
MOONFIRE_DIR="$(normalizeDirPath "`dirname "${p}"`/..")"
}
read_lines()
{
LINES_READ=()
while read -r line; do
LINES_READ+=("$line")
done
}
catPrefix()
{
sed -e "s/^/$2/" < "$1"
}
mkdir_moonfire()
{
sudo -u "${NVR_USER}" -H mkdir "$@"
}
echo_multi()
{
local prefix=''
local plus=''
while [[ $# -gt 0 ]]; do
case "$1" in
# Define a prefix for each line
-p) shift; prefix="$1"; shift ;;
# Provide extra empty line at end
-x) shift; plus=1 ;;
# Insert contents of LINES_READ here
# Only works as leading option
-L) shift; set -- "${LINES_READ[@]}" "$@" ;;
# Stop processing options
-) shift; break ;;
# Non option break out
*) break ;;
esac
done
local A=("$@")
for l in "${A[@]/#/$prefix}"; do
echo "$l"
done
[ -n "$plus" ] && echo
}
echo_stderr()
{
echo_multi "$@" 1>&2
}
echo_info()
{
echo_multi -x -p '>>> ' "$@"
}
echo_warn()
{
echo_multi -p 'WARNING: ' "$@" 1>&2
}
echo_error()
{
echo_multi -p 'ERROR: ' "$@" 1>&2
}
echo_fatal()
{
echo_error "$@"
exit 1;
}
# Read possible user config and then compute all derived environment
# variables used by the script(s).
#
initEnvironmentVars()
{
test -z "${MOONFIRE_DIR}" && functionsInit
if [ -r "${MOONFIRE_DIR}/prep.config" ]; then
. "${MOONFIRE_DIR}/prep.config"
fi
SRC_DIR="$(resolvePath "$MOONFIRE_DIR/src")"
NVR_USER="${NVR_USER:-moonfire-nvr}"
NVR_GROUP="${NVR_GROUP:-$NVR_USER}"
NVR_PORT="${NVR_PORT:-8080}"
NVR_HOME_BASE="${NVR_HOME_BASE:-/var/lib}"
NVR_HOME="${NVR_HOME_BASE}/${NVR_USER}"
DB_NAME="${DB_NAME:-db}"
DB_DIR="${DB_DIR:-$NVR_HOME/${DB_NAME}}"
SAMPLE_FILE_DIR="${SAMPLE_FILE_DIR:-sample}"
SAMPLE_MEDIA_DIR="${SAMPLE_MEDIA_DIR:-$NVR_HOME}"
SERVICE_NAME="${SERVICE_NAME:-moonfire-nvr}"
SERVICE_DESC="${SERVICE_DESC:-Moonfire NVR}"
SERVICE_BIN="${SERVICE_BIN:-/usr/local/bin/moonfire-nvr}"
LIB_DIR="${UI_DIR:-/usr/local/lib/moonfire-nvr}"
}
# Create file with confguration variables that are user changeable.
# Not all variables are included here, only the likely ones to be
# modified.
# If the file already exists, it will not be modified
#
makePrepConfig()
{
test -z "${MOONFIRE_DIR}" && functionsInit
if [ ! -f "${MOONFIRE_DIR}/prep.config" ]; then
cat >"${MOONFIRE_DIR}/prep.config" <<-EOF_CONFIG
NVR_USER=$NVR_USER
NVR_PORT=$NVR_PORT
SAMPLE_FILE_DIR=$SAMPLE_FILE_DIR
#SAMPLE_MEDIA_DIR=/mount/media
SERVICE_NAME=$SERVICE_NAME
SERVICE_DESC="$SERVICE_DESC"
EOF_CONFIG
echo_info -x "File prep.config newly created. Inspect and change as necessary." \
"When done, re-run this setup script. Currently it contains:"
catPrefix "${MOONFIRE_DIR}/prep.config" " "
echo_info -x
exit 0
else
echo_info -x "Setting up with variables:"
catPrefix "${MOONFIRE_DIR}/prep.config" " "
echo_info -x
fi
}
# Extract version data from stdin, possibly grepping first against
# single argument.
#
extractVersion()
{
local pattern="$1"
if [ -n "${pattern}" ]; then
grep "$pattern" | sed -e 's/[^0-9.]*\([0-9. ]*\).*/\1/' | tr -d ' '
else
sed -e 's/[^0-9.]*\([0-9. ]*\).*/\1/' | tr -d ' '
fi
}
getAVersion()
{
local v=`$1 $2 2>/dev/null | extractVersion`
if [ "X${v}" = "X" ]; then echo "$3"; else echo "${v}"; fi
}
getVersion()
{
getAVersion $1 --version $2
}
getClassicVersion()
{
getAVersion $1 -version $2
}
versionAtLeast()
{
v1=(${1//./ } 0 0 0); v1=("${v1[@]:0:3}")
v2=(${2//./ } 0 0 0); v2=("${v2[@]:0:3}")
for i in 0 1 2; do
if [ "${v1[$i]}" -gt "${v2[$i]}" ]; then return 0; fi
if [ "${v1[$i]}" -lt "${v2[$i]}" ]; then return 1; fi
done
return 0
}
initCargo()
{
if [ -r ~/.cargo/env ]; then
source ~/.cargo/env
fi
}
userExists()
{
return $(id -u "$1" >/dev/null 2>&1)
}
groupExists()
{
return $(id -g "$1" >/dev/null 2>&1)
}
moonfire()
{
case "$1" in
start)
sudo systemctl start "$2"
;;
stop)
sudo systemctl stop "$2"
;;
esac
}
sudo_warn()
{
echo_warn -x -p '!!!!! ' \
'------------------------------------------------------------------------------' \
'During this script you may be asked to input your root password' \
'This is for the purpose of using the sudo command and is necessary to complete' \
'the script successfully.' \
'------------------------------------------------------------------------------'
}
# Prepare for sqlite directory and set schema into db
#
setup_db()
{
DB_NAME=${1:-db}
if [ ! -d "${DB_DIR}" ]; then
echo_info -x 'Create database directory...'
mkdir_moonfire -p "${DB_DIR}"
fi
DB_PATH="${DB_DIR}/${DB_NAME}"
if [ ! -f "${DB_PATH}" ]; then
echo_info -x 'Create database and initialize...'
sudo -u "${NVR_USER}" -H sqlite3 "${DB_PATH}" < "${SRC_DIR}/schema.sql"
fi
}
# Make sure all sample directories and files owned by moonfire
#
fix_ownership()
{
sudo chown -R ${NVR_USER}.${NVR_USER} "$1"
echo_info -x "Fix ownership of files in \"$1\"..."
}
# Make sure samples directory is ready
#
prep_sample_file_dir()
{
if [ -z "${SAMPLE_MEDIA_DIR}" ]; then
echo_fatal -x "SAMPLE_MEDIA_DIR variable not configured. Check configuration."
exit 1
fi
SAMPLE_FILE_PATH="${SAMPLE_MEDIA_DIR}/${SAMPLE_FILE_DIR}"
if [ "${SAMPLE_FILE_PATH##${NVR_HOME}}" != "${SAMPLE_FILE_PATH}" ]; then
# Under the home directory, create if not there
if [ ! -d "${SAMPLE_FILE_PATH}" ]; then
echo_info -x "Created sample file directory: \"$SAMPLE_FILE_PATH\"..."
mkdir_moonfire -p "${SAMPLE_FILE_PATH}"
fi
else
if [ ! -d "${SAMPLE_FILE_PATH}" ]; then
read_lines <<-MSG1
Samples directory $SAMPLE_FILE_PATH does not exist.
If a mounted file system, make sure /etc/fstab is properly configured,
and file system is mounted and directory created.
MSG1
echo_fatal -L
fi
fi
fix_ownership "${SAMPLE_FILE_PATH}"
}
# Create user and groups if not there
#
prep_moonfire_user()
{
echo_info -x "Create user/group and directories we need..."
if ! groupExists "${NVR_GROUP}"; then
sudo addgroup --quiet --system ${NVR_GROUP}
fi
if ! userExists "${NVR_USER}"; then
sudo adduser --quiet --system ${NVR_USER} \
--ingroup "${NVR_GROUP}" --home "${NVR_HOME}"
fi
if [ ! -d "${NVR_HOME}" ]; then
sudo mkdir "${NVR_HOME}"
sudo chown "${NVR_USER}:${NVR_GROUP}" "${NVR_HOME}"
fi
sudo chown ${NVR_USER}:${NVR_GROUP} "${NVR_HOME}"
}
# Correct possible timezone issues
#
fix_localtime()
{
if [ ! -L /etc/localtime ] && [ -f /etc/timezone ] &&
[ -f "/usr/share/zoneinfo/`cat /etc/timezone`" ]; then
echo_info -x "Correcting /etc/localtime setup issue..."
sudo ln -sf /usr/share/zoneinfo/`cat /etc/timezone` /etc/localtime
fi
}
# Add/update cameras in the database
#
# $1: path to cameras.sql file
# $2: moonfire service name
# $3: moonfire user name
# $4: moonfire database path
#
addCameras()
{
local cpath="${CAMERAS_PATH:-$1}"
if [ -r "${cpath}" ]; then
echo_info -x 'Add cameras...'
# Before adding cameras, must stop service
moonfire stop "${SERVICE_NAME:-$2}" >/dev/null 2>&1
sudo -u ${NVR_USER:-$3} -H sqlite3 "${DB_PATH:-$4}" < "${cpath}"
moonfire start "${SERVICE_NAME:-$2}" >/dev/null 2>&1
fi
}
pre_install_prep()
{
prep_moonfire_user
setup_db db
prep_sample_file_dir
fix_localtime
}
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