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-rw-r--r--installer/functions.sh344
1 files changed, 344 insertions, 0 deletions
diff --git a/installer/functions.sh b/installer/functions.sh
new file mode 100644
index 00000000..36d10ec7
--- /dev/null
+++ b/installer/functions.sh
@@ -0,0 +1,344 @@
+# no shebang necessary - this is a library to be sourced
+
+# -----------------------------------------------------------------------------
+# checking the availability of commands
+
+which_cmd() {
+ which "${1}" 2>/dev/null || \
+ command -v "${1}" 2>/dev/null
+}
+
+check_cmd() {
+ which_cmd "${1}" >/dev/null 2>&1 && return 0
+ return 1
+}
+
+
+# -----------------------------------------------------------------------------
+
+setup_terminal() {
+ TPUT_RESET=""
+ TPUT_BLACK=""
+ TPUT_RED=""
+ TPUT_GREEN=""
+ TPUT_YELLOW=""
+ TPUT_BLUE=""
+ TPUT_PURPLE=""
+ TPUT_CYAN=""
+ TPUT_WHITE=""
+ TPUT_BGBLACK=""
+ TPUT_BGRED=""
+ TPUT_BGGREEN=""
+ TPUT_BGYELLOW=""
+ TPUT_BGBLUE=""
+ TPUT_BGPURPLE=""
+ TPUT_BGCYAN=""
+ TPUT_BGWHITE=""
+ TPUT_BOLD=""
+ TPUT_DIM=""
+ TPUT_UNDERLINED=""
+ TPUT_BLINK=""
+ TPUT_INVERTED=""
+ TPUT_STANDOUT=""
+ TPUT_BELL=""
+ TPUT_CLEAR=""
+
+ # Is stderr on the terminal? If not, then fail
+ test -t 2 || return 1
+
+ if check_cmd tput
+ then
+ if [ $(( $(tput colors 2>/dev/null) )) -ge 8 ]
+ then
+ # Enable colors
+ TPUT_RESET="$(tput sgr 0)"
+ TPUT_BLACK="$(tput setaf 0)"
+ TPUT_RED="$(tput setaf 1)"
+ TPUT_GREEN="$(tput setaf 2)"
+ TPUT_YELLOW="$(tput setaf 3)"
+ TPUT_BLUE="$(tput setaf 4)"
+ TPUT_PURPLE="$(tput setaf 5)"
+ TPUT_CYAN="$(tput setaf 6)"
+ TPUT_WHITE="$(tput setaf 7)"
+ TPUT_BGBLACK="$(tput setab 0)"
+ TPUT_BGRED="$(tput setab 1)"
+ TPUT_BGGREEN="$(tput setab 2)"
+ TPUT_BGYELLOW="$(tput setab 3)"
+ TPUT_BGBLUE="$(tput setab 4)"
+ TPUT_BGPURPLE="$(tput setab 5)"
+ TPUT_BGCYAN="$(tput setab 6)"
+ TPUT_BGWHITE="$(tput setab 7)"
+ TPUT_BOLD="$(tput bold)"
+ TPUT_DIM="$(tput dim)"
+ TPUT_UNDERLINED="$(tput smul)"
+ TPUT_BLINK="$(tput blink)"
+ TPUT_INVERTED="$(tput rev)"
+ TPUT_STANDOUT="$(tput smso)"
+ TPUT_BELL="$(tput bel)"
+ TPUT_CLEAR="$(tput clear)"
+ fi
+ fi
+
+ return 0
+}
+setup_terminal
+
+progress() {
+ echo >&2 " --- ${TPUT_DIM}${TPUT_BOLD}${*}${TPUT_RESET} --- "
+}
+
+# -----------------------------------------------------------------------------
+
+netdata_banner() {
+ local l1=" ^" \
+ l2=" |.-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-. .-" \
+ l3=" | '-' '-' '-' '-' '-' '-' '-' '-' '-' '-' '-' '-' " \
+ l4=" +----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--->" \
+ sp=" " \
+ netdata="netdata" start end msg="${*}" chartcolor="${TPUT_DIM}"
+
+ [ ${#msg} -lt ${#netdata} ] && msg="${msg}${sp:0:$(( ${#netdata} - ${#msg}))}"
+ [ ${#msg} -gt $(( ${#l2} - 20 )) ] && msg="${msg:0:$(( ${#l2} - 23 ))}..."
+
+ start="$(( ${#l2} / 2 - 4 ))"
+ [ $(( start + ${#msg} + 4 )) -gt ${#l2} ] && start=$((${#l2} - ${#msg} - 4))
+ end=$(( ${start} + ${#msg} + 4 ))
+
+ echo >&2
+ echo >&2 "${chartcolor}${l1}${TPUT_RESET}"
+ echo >&2 "${chartcolor}${l2:0:start}${sp:0:2}${TPUT_RESET}${TPUT_BOLD}${TPUT_GREEN}${netdata}${TPUT_RESET}${chartcolor}${sp:0:$((end - start - 2 - ${#netdata}))}${l2:end:$((${#l2} - end))}${TPUT_RESET}"
+ echo >&2 "${chartcolor}${l3:0:start}${sp:0:2}${TPUT_RESET}${TPUT_BOLD}${TPUT_CYAN}${msg}${TPUT_RESET}${chartcolor}${sp:0:2}${l3:end:$((${#l2} - end))}${TPUT_RESET}"
+ echo >&2 "${chartcolor}${l4}${TPUT_RESET}"
+ echo >&2
+}
+
+# -----------------------------------------------------------------------------
+# portable service command
+
+service_cmd="$(which_cmd service)"
+systemctl_cmd="$(which_cmd systemctl)"
+service() {
+ local cmd="${1}" action="${2}"
+
+ if [ ! -z "${service_cmd}" ]
+ then
+ run "${service_cmd}" "${cmd}" "${action}"
+ return $?
+ elif [ ! -z "${systemctl_cmd}" ]
+ then
+ run "${systemctl_cmd}" "${action}" "${cmd}"
+ return $?
+ fi
+ return 1
+}
+
+# -----------------------------------------------------------------------------
+
+run_ok() {
+ printf >&2 "${TPUT_BGGREEN}${TPUT_WHITE}${TPUT_BOLD} OK ${TPUT_RESET} ${*} \n\n"
+}
+
+run_failed() {
+ printf >&2 "${TPUT_BGRED}${TPUT_WHITE}${TPUT_BOLD} FAILED ${TPUT_RESET} ${*} \n\n"
+}
+
+run_logfile="/dev/null"
+run() {
+ local user="${USER}" dir="$(basename "${PWD}")" info info_console
+
+ if [ "${UID}" = "0" ]
+ then
+ info="[root ${dir}]# "
+ info_console="[${TPUT_DIM}${dir}${TPUT_RESET}]# "
+ else
+ info="[${user} ${dir}]$ "
+ info_console="[${TPUT_DIM}${dir}${TPUT_RESET}]$ "
+ fi
+
+ printf >> "${run_logfile}" "${info}"
+ printf >> "${run_logfile}" "%q " "${@}"
+ printf >> "${run_logfile}" " ... "
+
+ printf >&2 "${info_console}${TPUT_BOLD}${TPUT_YELLOW}"
+ printf >&2 "%q " "${@}"
+ printf >&2 "${TPUT_RESET}\n"
+
+ "${@}"
+
+ local ret=$?
+ if [ ${ret} -ne 0 ]
+ then
+ run_failed
+ printf >> "${run_logfile}" "FAILED with exit code ${ret}\n"
+ else
+ run_ok
+ printf >> "${run_logfile}" "OK\n"
+ fi
+
+ return ${ret}
+}
+
+portable_add_user() {
+ local username="${1}"
+
+ getent passwd "${username}" > /dev/null 2>&1
+ [ $? -eq 0 ] && echo >&2 "User '${username}' already exists." && return 0
+
+ echo >&2 "Adding ${username} user account ..."
+
+ local nologin="$(which nologin 2>/dev/null || command -v nologin 2>/dev/null || echo '/bin/false')"
+
+ # Linux
+ if check_cmd useradd
+ then
+ run useradd -r -g "${username}" -c "${username}" -s "${nologin}" -d / "${username}" && return 0
+ fi
+
+ # FreeBSD
+ if check_cmd pw
+ then
+ run pw useradd "${username}" -d / -g "${username}" -s "${nologin}" && return 0
+ fi
+
+ # BusyBox
+ if check_cmd adduser
+ then
+ run adduser -D -G "${username}" "${username}" && return 0
+ fi
+
+ echo >&2 "Failed to add ${username} user account !"
+
+ return 1
+}
+
+portable_add_group() {
+ local groupname="${1}"
+
+ getent group "${groupname}" > /dev/null 2>&1
+ [ $? -eq 0 ] && echo >&2 "Group '${groupname}' already exists." && return 0
+
+ echo >&2 "Adding ${groupname} user group ..."
+
+ # Linux
+ if check_cmd groupadd
+ then
+ run groupadd -r "${groupname}" && return 0
+ fi
+
+ # FreeBSD
+ if check_cmd pw
+ then
+ run pw groupadd "${groupname}" && return 0
+ fi
+
+ # BusyBox
+ if check_cmd addgroup
+ then
+ run addgroup "${groupname}" && return 0
+ fi
+
+ echo >&2 "Failed to add ${groupname} user group !"
+ return 1
+}
+
+portable_add_user_to_group() {
+ local groupname="${1}" username="${2}"
+
+ getent group "${groupname}" > /dev/null 2>&1
+ [ $? -ne 0 ] && echo >&2 "Group '${groupname}' does not exist." && return 1
+
+ # find the user is already in the group
+ local users=$(getent group "${groupname}" | cut -d ':' -f 4)
+ if [[ ",${users}," =~ ,${username}, ]]
+ then
+ # username is already there
+ echo >&2 "User '${username}' is already in group '${groupname}'."
+ return 0
+ else
+ # username is not in group
+ echo >&2 "Adding ${username} user to the ${groupname} group ..."
+
+ # Linux
+ if check_cmd usermod
+ then
+ run usermod -a -G "${groupname}" "${username}" && return 0
+ fi
+
+ # FreeBSD
+ if check_cmd pw
+ then
+ run pw groupmod "${groupname}" -m "${username}" && return 0
+ fi
+
+ # BusyBox
+ if check_cmd addgroup
+ then
+ run addgroup "${username}" "${groupname}" && return 0
+ fi
+
+ echo >&2 "Failed to add user ${username} to group ${groupname} !"
+ return 1
+ fi
+}
+
+iscontainer() {
+ # man systemd-detect-virt
+ local cmd=$(which_cmd systemd-detect-virt)
+ if [ ! -z "${cmd}" -a -x "${cmd}" ]
+ then
+ "${cmd}" --container >/dev/null 2>&1 && return 0
+ fi
+
+ # /proc/1/sched exposes the host's pid of our init !
+ # http://stackoverflow.com/a/37016302
+ local pid=$( cat /proc/1/sched 2>/dev/null | head -n 1 | { IFS='(),#:' read name pid th threads; echo $pid; } )
+ pid=$(( pid + 0 ))
+ [ ${pid} -ne 1 ] && return 0
+
+ # lxc sets environment variable 'container'
+ [ ! -z "${container}" ] && return 0
+
+ # docker creates /.dockerenv
+ # http://stackoverflow.com/a/25518345
+ [ -f "/.dockerenv" ] && return 0
+
+ # ubuntu and debian supply /bin/running-in-container
+ # https://www.apt-browse.org/browse/ubuntu/trusty/main/i386/upstart/1.12.1-0ubuntu4/file/bin/running-in-container
+ if [ -x "/bin/running-in-container" ]
+ then
+ "/bin/running-in-container" >/dev/null 2>&1 && return 0
+ fi
+
+ return 1
+}
+
+issystemd() {
+ local pids p myns ns systemctl
+
+ # if the directory /etc/systemd/system does not exit, it is not systemd
+ [ ! -d /etc/systemd/system ] && return 1
+
+ # if there is no systemctl command, it is not systemd
+ systemctl=$(which systemctl 2>/dev/null || command -v systemctl 2>/dev/null)
+ [ -z "${systemctl}" -o ! -x "${systemctl}" ] && return 1
+
+ # if pid 1 is systemd, it is systemd
+ [ "$(basename $(readlink /proc/1/exe) 2>/dev/null)" = "systemd" ] && return 0
+
+ # if systemd is not running, it is not systemd
+ pids=$(pidof systemd 2>/dev/null)
+ [ -z "${pids}" ] && return 1
+
+ # check if the running systemd processes are not in our namespace
+ myns="$(readlink /proc/self/ns/pid 2>/dev/null)"
+ for p in ${pids}
+ do
+ ns="$(readlink /proc/${p}/ns/pid 2>/dev/null)"
+
+ # if pid of systemd is in our namespace, it is systemd
+ [ ! -z "${myns}" && "${myns}" = "${ns}" ] && return 0
+ done
+
+ # else, it is not systemd
+ return 1
+}
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