From bed7e5b6a0b9ea0ddfc76c6f77eb91df81b92521 Mon Sep 17 00:00:00 2001
From: Federico Ceratto <federico.ceratto@gmail.com>
Date: Sun, 30 Apr 2017 17:09:37 +0100
Subject: New upstream version 1.6.0+dfsg

---
 installer/functions.sh | 344 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 344 insertions(+)
 create mode 100644 installer/functions.sh

(limited to 'installer/functions.sh')

diff --git a/installer/functions.sh b/installer/functions.sh
new file mode 100644
index 000000000..36d10ec70
--- /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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