+ D.2. + /lib/lsb/init-functions +

#!/bin/sh
+########################################################################
+#
+# Begin /lib/lsb/init-funtions
+#
+# Description : Run Level Control Functions
+#
+# Authors     : Gerard Beekmans - gerard@linuxfromscratch.org
+#             : DJ Lucas - dj@linuxfromscratch.org
+# Update      : Bruce Dubbs - bdubbs@linuxfromscratch.org
+#
+# Version     : LFS 7.0
+#
+# Notes       : With code based on Matthias Benkmann's simpleinit-msb
+#               http://winterdrache.de/linux/newboot/index.html
+#
+#               The file should be located in /lib/lsb
+#
+########################################################################
+
+## Environmental setup
+# Setup default values for environment
+umask 022
+export PATH="/bin:/usr/bin:/sbin:/usr/sbin"
+
+## Set color commands, used via echo
+# Please consult `man console_codes for more information
+# under the "ECMA-48 Set Graphics Rendition" section
+#
+# Warning: when switching from a 8bit to a 9bit font,
+# the linux console will reinterpret the bold (1;) to
+# the top 256 glyphs of the 9bit font.  This does
+# not affect framebuffer consoles
+
+NORMAL="\\033[0;39m"         # Standard console grey
+SUCCESS="\\033[1;32m"        # Success is green
+WARNING="\\033[1;33m"        # Warnings are yellow
+FAILURE="\\033[1;31m"        # Failures are red
+INFO="\\033[1;36m"           # Information is light cyan
+BRACKET="\\033[1;34m"        # Brackets are blue
+
+# Use a colored prefix
+BMPREFIX="      "
+SUCCESS_PREFIX="${SUCCESS}  *  ${NORMAL} "
+FAILURE_PREFIX="${FAILURE}*****${NORMAL} "
+WARNING_PREFIX="${WARNING} *** ${NORMAL} "
+SKIP_PREFIX="${INFO}  S   ${NORMAL}"
+
+SUCCESS_SUFFIX="${BRACKET}[${SUCCESS}  OK  ${BRACKET}]${NORMAL}"
+FAILURE_SUFFIX="${BRACKET}[${FAILURE} FAIL ${BRACKET}]${NORMAL}"
+WARNING_SUFFIX="${BRACKET}[${WARNING} WARN ${BRACKET}]${NORMAL}"
+SKIP_SUFFIX="${BRACKET}[${INFO} SKIP ${BRACKET}]${NORMAL}"
+
+BOOTLOG=/run/bootlog
+KILLDELAY=3
+SCRIPT_STAT="0"
+
+# Set any user specified environment variables e.g. HEADLESS
+[ -r /etc/sysconfig/rc.site ]  && . /etc/sysconfig/rc.site
+
+## Screen Dimensions
+# Find current screen size
+if [ -z "${COLUMNS}" ]; then
+   COLUMNS=$(stty size)
+   COLUMNS=${COLUMNS##* }
+fi
+
+# When using remote connections, such as a serial port, stty size returns 0
+if [ "${COLUMNS}" = "0" ]; then
+   COLUMNS=80
+fi
+
+## Measurements for positioning result messages
+COL=$((${COLUMNS} - 8))
+WCOL=$((${COL} - 2))
+
+## Set Cursor Position Commands, used via echo
+SET_COL="\\033[${COL}G"      # at the $COL char
+SET_WCOL="\\033[${WCOL}G"    # at the $WCOL char
+CURS_UP="\\033[1A\\033[0G"   # Up one line, at the 0'th char
+CURS_ZERO="\\033[0G"
+
+################################################################################
+# start_daemon()                                                               #
+# Usage: start_daemon [-f] [-n nicelevel] [-p pidfile] pathname [args...]      #
+#                                                                              #
+# Purpose: This runs the specified program as a daemon                         #
+#                                                                              #
+# Inputs: -f: (force) run the program even if it is already running.           #
+#         -n nicelevel: specify a nice level. See 'man nice(1)'.               #
+#         -p pidfile: use the specified file to determine PIDs.                #
+#         pathname: the complete path to the specified program                 #
+#         args: additional arguments passed to the program (pathname)          #
+#                                                                              #
+# Return values (as defined by LSB exit codes):                                #
+#       0 - program is running or service is OK                                #
+#       1 - generic or unspecified error                                       #
+#       2 - invalid or excessive argument(s)                                   #
+#       5 - program is not installed                                           #
+################################################################################
+start_daemon()
+{
+    local force=""
+    local nice="0"
+    local pidfile=""
+    local pidlist=""
+    local retval=""
+
+    # Process arguments
+    while true
+    do
+        case "${1}" in
+
+            -f)
+                force="1"
+                shift 1
+                ;;
+
+            -n)
+                nice="${2}"
+                shift 2
+                ;;
+
+            -p)
+                pidfile="${2}"
+                shift 2
+                ;;
+
+            -*)
+                return 2
+                ;;
+
+            *)
+                program="${1}"
+                break
+                ;;
+        esac
+    done
+
+    # Check for a valid program
+    if [ ! -e "${program}" ]; then return 5; fi
+
+    # Execute
+    if [ -z "${force}" ]; then
+        if [ -z "${pidfile}" ]; then
+            # Determine the pid by discovery
+            pidlist=`pidofproc "${1}"`
+            retval="${?}"
+        else
+            # The PID file contains the needed PIDs
+            # Note that by LSB requirement, the path must be given to pidofproc,
+            # however, it is not used by the current implementation or standard.
+            pidlist=`pidofproc -p "${pidfile}" "${1}"`
+            retval="${?}"
+        fi
+
+        # Return a value ONLY
+        # It is the init script's (or distribution's functions) responsibility
+        # to log messages!
+        case "${retval}" in
+
+            0)
+                # Program is already running correctly, this is a
+                # successful start.
+                return 0
+                ;;
+
+            1)
+                # Program is not running, but an invalid pid file exists
+                # remove the pid file and continue
+                rm -f "${pidfile}"
+                ;;
+
+            3)
+                # Program is not running and no pidfile exists
+                # do nothing here, let start_deamon continue.
+                ;;
+
+            *)
+                # Others as returned by status values shall not be interpreted
+                # and returned as an unspecified error.
+                return 1
+                ;;
+        esac
+    fi
+
+    # Do the start!
+    nice -n "${nice}" "${@}"
+}
+
+################################################################################
+# killproc()                                                                   #
+# Usage: killproc [-p pidfile] pathname [signal]                               #
+#                                                                              #
+# Purpose: Send control signals to running processes                           #
+#                                                                              #
+# Inputs: -p pidfile, uses the specified pidfile                               #
+#         pathname, pathname to the specified program                          #
+#         signal, send this signal to pathname                                 #
+#                                                                              #
+# Return values (as defined by LSB exit codes):                                #
+#       0 - program (pathname) has stopped/is already stopped or a             #
+#           running program has been sent specified signal and stopped         #
+#           successfully                                                       #
+#       1 - generic or unspecified error                                       #
+#       2 - invalid or excessive argument(s)                                   #
+#       5 - program is not installed                                           #
+#       7 - program is not running and a signal was supplied                   #
+################################################################################
+killproc()
+{
+    local pidfile
+    local program
+    local prefix
+    local progname
+    local signal="-TERM"
+    local fallback="-KILL"
+    local nosig
+    local pidlist
+    local retval
+    local pid
+    local delay="30"
+    local piddead
+    local dtime
+
+    # Process arguments
+    while true; do
+        case "${1}" in
+            -p)
+                pidfile="${2}"
+                shift 2
+                ;;
+
+             *)
+                 program="${1}"
+                 if [ -n "${2}" ]; then
+                     signal="${2}"
+                     fallback=""
+                 else
+                     nosig=1
+                 fi
+
+                 # Error on additional arguments
+                 if [ -n "${3}" ]; then
+                     return 2
+                 else
+                     break
+                 fi
+                 ;;
+        esac
+    done
+
+    # Check for a valid program
+    if [ ! -e "${program}" ]; then return 5; fi
+
+    # Check for a valid signal
+    check_signal "${signal}"
+    if [ "${?}" -ne "0" ]; then return 2; fi
+
+    # Get a list of pids
+    if [ -z "${pidfile}" ]; then
+        # determine the pid by discovery
+        pidlist=`pidofproc "${1}"`
+        retval="${?}"
+    else
+        # The PID file contains the needed PIDs
+        # Note that by LSB requirement, the path must be given to pidofproc,
+        # however, it is not used by the current implementation or standard.
+        pidlist=`pidofproc -p "${pidfile}" "${1}"`
+        retval="${?}"
+    fi
+
+    # Return a value ONLY
+    # It is the init script's (or distribution's functions) responsibility
+    # to log messages!
+    case "${retval}" in
+
+        0)
+            # Program is running correctly
+            # Do nothing here, let killproc continue.
+            ;;
+
+        1)
+            # Program is not running, but an invalid pid file exists
+            # Remove the pid file.
+
+            progname=${program##*/}
+
+            if [[ -e "/run/${progname}.pid" ]]; then
+                pidfile="/run/${progname}.pid"
+                rm -f "${pidfile}"
+            fi
+
+            # This is only a success if no signal was passed.
+            if [ -n "${nosig}" ]; then
+                return 0
+            else
+                return 7
+            fi
+            ;;
+
+        3)
+            # Program is not running and no pidfile exists
+            # This is only a success if no signal was passed.
+            if [ -n "${nosig}" ]; then
+                return 0
+            else
+                return 7
+            fi
+            ;;
+
+        *)
+            # Others as returned by status values shall not be interpreted
+            # and returned as an unspecified error.
+            return 1
+            ;;
+    esac
+
+    # Perform different actions for exit signals and control signals
+    check_sig_type "${signal}"
+
+    if [ "${?}" -eq "0" ]; then # Signal is used to terminate the program
+
+        # Account for empty pidlist (pid file still exists and no
+        # signal was given)
+        if [ "${pidlist}" != "" ]; then
+
+            # Kill the list of pids
+            for pid in ${pidlist}; do
+
+                kill -0 "${pid}" 2> /dev/null
+
+                if [ "${?}" -ne "0" ]; then
+                    # Process is dead, continue to next and assume all is well
+                    continue
+                else
+                    kill "${signal}" "${pid}" 2> /dev/null
+
+                    # Wait up to ${delay}/10 seconds to for "${pid}" to
+                    # terminate in 10ths of a second
+
+                    while [ "${delay}" -ne "0" ]; do
+                        kill -0 "${pid}" 2> /dev/null || piddead="1"
+                        if [ "${piddead}" = "1" ]; then break; fi
+                        sleep 0.1
+                        delay="$(( ${delay} - 1 ))"
+                    done
+
+                    # If a fallback is set, and program is still running, then
+                    # use the fallback
+                    if [ -n "${fallback}" -a "${piddead}" != "1" ]; then
+                        kill "${fallback}" "${pid}" 2> /dev/null
+                        sleep 1
+                        # Check again, and fail if still running
+                        kill -0 "${pid}" 2> /dev/null && return 1
+                    fi
+                fi
+            done
+        fi
+
+        # Check for and remove stale PID files.
+        if [ -z "${pidfile}" ]; then
+            # Find the basename of $program
+            prefix=`echo "${program}" | sed 's/[^/]*$//'`
+            progname=`echo "${program}" | sed "s@${prefix}@@"`
+
+            if [ -e "/run/${progname}.pid" ]; then
+                rm -f "/run/${progname}.pid" 2> /dev/null
+            fi
+        else
+            if [ -e "${pidfile}" ]; then rm -f "${pidfile}" 2> /dev/null; fi
+        fi
+
+    # For signals that do not expect a program to exit, simply
+    # let kill do its job, and evaluate kill's return for value
+
+    else # check_sig_type - signal is not used to terminate program
+        for pid in ${pidlist}; do
+            kill "${signal}" "${pid}"
+            if [ "${?}" -ne "0" ]; then return 1; fi
+        done
+    fi
+}
+
+################################################################################
+# pidofproc()                                                                  #
+# Usage: pidofproc [-p pidfile] pathname                                       #
+#                                                                              #
+# Purpose: This function returns one or more pid(s) for a particular daemon    #
+#                                                                              #
+# Inputs: -p pidfile, use the specified pidfile instead of pidof               #
+#         pathname, path to the specified program                              #
+#                                                                              #
+# Return values (as defined by LSB status codes):                              #
+#       0 - Success (PIDs to stdout)                                           #
+#       1 - Program is dead, PID file still exists (remaining PIDs output)     #
+#       3 - Program is not running (no output)                                 #
+################################################################################
+pidofproc()
+{
+    local pidfile
+    local program
+    local prefix
+    local progname
+    local pidlist
+    local lpids
+    local exitstatus="0"
+
+    # Process arguments
+    while true; do
+        case "${1}" in
+
+            -p)
+                pidfile="${2}"
+                shift 2
+                ;;
+
+            *)
+                program="${1}"
+                if [ -n "${2}" ]; then
+                    # Too many arguments
+                    # Since this is status, return unknown
+                    return 4
+                else
+                    break
+                fi
+                ;;
+        esac
+    done
+
+    # If a PID file is not specified, try and find one.
+    if [ -z "${pidfile}" ]; then
+        # Get the program's basename
+        prefix=`echo "${program}" | sed 's/[^/]*$//'`
+
+        if [ -z "${prefix}" ]; then
+           progname="${program}"
+        else
+           progname=`echo "${program}" | sed "s@${prefix}@@"`
+        fi
+
+        # If a PID file exists with that name, assume that is it.
+        if [ -e "/run/${progname}.pid" ]; then
+            pidfile="/run/${progname}.pid"
+        fi
+    fi
+
+    # If a PID file is set and exists, use it.
+    if [ -n "${pidfile}" -a -e "${pidfile}" ]; then
+
+        # Use the value in the first line of the pidfile
+        pidlist=`/bin/head -n1 "${pidfile}"`
+        # This can optionally be written as 'sed 1q' to repalce 'head -n1'
+        # should LFS move /bin/head to /usr/bin/head
+    else
+        # Use pidof
+        pidlist=`pidof "${program}"`
+    fi
+
+    # Figure out if all listed PIDs are running.
+    for pid in ${pidlist}; do
+        kill -0 ${pid} 2> /dev/null
+
+        if [ "${?}" -eq "0" ]; then
+            lpids="${lpids}${pid} "
+        else
+            exitstatus="1"
+        fi
+    done
+
+    if [ -z "${lpids}" -a ! -f "${pidfile}" ]; then
+        return 3
+    else
+        echo "${lpids}"
+        return "${exitstatus}"
+    fi
+}
+
+################################################################################
+# statusproc()                                                                 #
+# Usage: statusproc [-p pidfile] pathname                                      #
+#                                                                              #
+# Purpose: This function prints the status of a particular daemon to stdout    #
+#                                                                              #
+# Inputs: -p pidfile, use the specified pidfile instead of pidof               #
+#         pathname, path to the specified program                              #
+#                                                                              #
+# Return values:                                                               #
+#       0 - Status printed                                                     #
+#       1 - Input error. The daemon to check was not specified.                #
+################################################################################
+statusproc()
+{
+   local pidfile
+   local pidlist
+
+   if [ "${#}" = "0" ]; then
+      echo "Usage: statusproc [-p pidfle] {program}"
+      exit 1
+   fi
+
+   # Process arguments
+   while true; do
+       case "${1}" in
+
+           -p)
+               pidfile="${2}"
+               shift 2
+               ;;
+
+           *)
+               if [ -n "${2}" ]; then
+                   echo "Too many arguments"
+                   return 1
+               else
+                   break
+               fi
+               ;;
+       esac
+   done
+
+   if [ -n "${pidfile}" ]; then
+      pidlist=`pidofproc -p "${pidfile}" $@`
+   else
+      pidlist=`pidofproc $@`
+   fi
+
+   # Trim trailing blanks
+   pidlist=`echo "${pidlist}" | sed -r 's/ +$//'`
+
+   base="${1##*/}"
+
+   if [ -n "${pidlist}" ]; then
+      /bin/echo -e "${INFO}${base} is running with Process" \
+         "ID(s) ${pidlist}.${NORMAL}"
+   else
+      if [ -n "${base}" -a -e "/run/${base}.pid" ]; then
+         /bin/echo -e "${WARNING}${1} is not running but" \
+            "/run/${base}.pid exists.${NORMAL}"
+      else
+         if [ -n "${pidfile}" -a -e "${pidfile}" ]; then
+            /bin/echo -e "${WARNING}${1} is not running" \
+               "but ${pidfile} exists.${NORMAL}"
+         else
+            /bin/echo -e "${INFO}${1} is not running.${NORMAL}"
+         fi
+      fi
+   fi
+}
+
+################################################################################
+# timespec()                                                                   #
+#                                                                              #
+# Purpose: An internal utility function to format a timestamp                  #
+#          a boot log file.  Sets the STAMP variable.                          #
+#                                                                              #
+# Return value: Not used                                                       #
+################################################################################
+timespec()
+{
+   STAMP="$(echo `date +"%b %d %T %:z"` `hostname`) "
+   return 0
+}
+
+################################################################################
+# log_success_msg()                                                            #
+# Usage: log_success_msg ["message"]                                           #
+#                                                                              #
+# Purpose: Print a successful status message to the screen and                 #
+#          a boot log file.                                                    #
+#                                                                              #
+# Inputs: $@ - Message                                                         #
+#                                                                              #
+# Return values: Not used                                                      #
+################################################################################
+log_success_msg()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+    /bin/echo -e "${CURS_ZERO}${SUCCESS_PREFIX}${SET_COL}${SUCCESS_SUFFIX}"
+
+    # Strip non-printable characters from log file
+    logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
+
+    timespec
+    /bin/echo -e "${STAMP} ${logmessage} OK" >> ${BOOTLOG}
+
+    return 0
+}
+
+log_success_msg2()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+    /bin/echo -e "${CURS_ZERO}${SUCCESS_PREFIX}${SET_COL}${SUCCESS_SUFFIX}"
+
+    echo " OK" >> ${BOOTLOG}
+
+    return 0
+}
+
+################################################################################
+# log_failure_msg()                                                            #
+# Usage: log_failure_msg ["message"]                                           #
+#                                                                              #
+# Purpose: Print a failure status message to the screen and                    #
+#          a boot log file.                                                    #
+#                                                                              #
+# Inputs: $@ - Message                                                         #
+#                                                                              #
+# Return values: Not used                                                      #
+################################################################################
+log_failure_msg()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+    /bin/echo -e "${CURS_ZERO}${FAILURE_PREFIX}${SET_COL}${FAILURE_SUFFIX}"
+
+    # Strip non-printable characters from log file
+
+    timespec
+    logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
+    /bin/echo -e "${STAMP} ${logmessage} FAIL" >> ${BOOTLOG}
+
+    return 0
+}
+
+log_failure_msg2()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+    /bin/echo -e "${CURS_ZERO}${FAILURE_PREFIX}${SET_COL}${FAILURE_SUFFIX}"
+
+    echo "FAIL" >> ${BOOTLOG}
+
+    return 0
+}
+
+################################################################################
+# log_warning_msg()                                                            #
+# Usage: log_warning_msg ["message"]                                           #
+#                                                                              #
+# Purpose: Print a warning status message to the screen and                    #
+#          a boot log file.                                                    #
+#                                                                              #
+# Return values: Not used                                                      #
+################################################################################
+log_warning_msg()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+    /bin/echo -e "${CURS_ZERO}${WARNING_PREFIX}${SET_COL}${WARNING_SUFFIX}"
+
+    # Strip non-printable characters from log file
+    logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
+    timespec
+    /bin/echo -e "${STAMP} ${logmessage} WARN" >> ${BOOTLOG}
+
+    return 0
+}
+
+log_skip_msg()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+    /bin/echo -e "${CURS_ZERO}${SKIP_PREFIX}${SET_COL}${SKIP_SUFFIX}"
+
+    # Strip non-printable characters from log file
+    logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
+    /bin/echo "SKIP" >> ${BOOTLOG}
+
+    return 0
+}
+
+################################################################################
+# log_info_msg()                                                               #
+# Usage: log_info_msg message                                                  #
+#                                                                              #
+# Purpose: Print an information message to the screen and                      #
+#          a boot log file.  Does not print a trailing newline character.      #
+#                                                                              #
+# Return values: Not used                                                      #
+################################################################################
+log_info_msg()
+{
+    /bin/echo -n -e "${BMPREFIX}${@}"
+
+    # Strip non-printable characters from log file
+    logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
+    timespec
+    /bin/echo -n -e "${STAMP} ${logmessage}" >> ${BOOTLOG}
+
+    return 0
+}
+
+log_info_msg2()
+{
+    /bin/echo -n -e "${@}"
+
+    # Strip non-printable characters from log file
+    logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
+    /bin/echo -n -e "${logmessage}" >> ${BOOTLOG}
+
+    return 0
+}
+
+################################################################################
+# evaluate_retval()                                                            #
+# Usage: Evaluate a return value and print success or failure as appropriate  #
+#                                                                              #
+# Purpose: Convenience function to terminate an info message                   #
+#                                                                              #
+# Return values: Not used                                                      #
+################################################################################
+evaluate_retval()
+{
+   local error_value="${?}"
+
+   if [ ${error_value} = 0 ]; then
+      log_success_msg2
+   else
+      log_failure_msg2
+   fi
+}
+
+################################################################################
+# check_signal()                                                               #
+# Usage: check_signal [ -{signal} ]                                            #
+#                                                                              #
+# Purpose: Check for a valid signal.  This is not defined by any LSB draft,    #
+#          however, it is required to check the signals to determine if the    #
+#          signals chosen are invalid arguments to the other functions.        #
+#                                                                              #
+# Inputs: Accepts a single string value in the form of -{signal}               #
+#                                                                              #
+# Return values:                                                               #
+#       0 - Success (signal is valid                                           #
+#       1 - Signal is not valid                                                #
+################################################################################
+check_signal()
+{
+    local valsig
+
+    # Add error handling for invalid signals
+    valsig=" -ALRM -HUP -INT -KILL -PIPE -POLL -PROF -TERM -USR1 -USR2"
+    valsig="${valsig} -VTALRM -STKFLT -PWR -WINCH -CHLD -URG -TSTP -TTIN"
+    valsig="${valsig} -TTOU -STOP -CONT -ABRT -FPE -ILL -QUIT -SEGV -TRAP"
+    valsig="${valsig} -SYS -EMT -BUS -XCPU -XFSZ -0 -1 -2 -3 -4 -5 -6 -8 -9"
+    valsig="${valsig} -11 -13 -14 -15 "
+
+    echo "${valsig}" | grep -- " ${1} " > /dev/null
+
+    if [ "${?}" -eq "0" ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+################################################################################
+# check_sig_type()                                                             #
+# Usage: check_signal [ -{signal} | {signal} ]                                 #
+#                                                                              #
+# Purpose: Check if signal is a program termination signal or a control signal #
+#          This is not defined by any LSB draft, however, it is required to    #
+#          check the signals to determine if they are intended to end a        #
+#          program or simply to control it.                                    #
+#                                                                              #
+# Inputs: Accepts a single string value in the form or -{signal} or {signal}   #
+#                                                                              #
+# Return values:                                                               #
+#       0 - Signal is used for program termination                             #
+#       1 - Signal is used for program control                                 #
+################################################################################
+check_sig_type()
+{
+    local valsig
+
+    # The list of termination signals (limited to generally used items)
+    valsig=" -ALRM -INT -KILL -TERM -PWR -STOP -ABRT -QUIT -2 -3 -6 -9 -14 -15 "
+
+    echo "${valsig}" | grep -- " ${1} " > /dev/null
+
+    if [ "${?}" -eq "0" ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+################################################################################
+# wait_for_user()                                                              #
+#                                                                              #
+# Purpose: Wait for the user to respond if not a headless system               #
+#                                                                              #
+################################################################################
+wait_for_user()
+{
+   # Wait for the user by default
+   [ "${HEADLESS=0}" = "0" ] && read ENTER
+   return 0
+}
+
+################################################################################
+# is_true()                                                                    #
+#                                                                              #
+# Purpose: Utility to test if a variable is true | yes | 1                     #
+#                                                                              #
+################################################################################
+is_true()
+{
+   [ "$1" = "1" ] || [ "$1" = "yes" ] || [ "$1" = "true" ] ||  [ "$1" = "y" ] ||
+   [ "$1" = "t" ]
+}
+
+# End /lib/lsb/init-functions
+
+ Линукс с нуля - Версия 12.0 +

+ Приложение D. Скрипты загрузки и настройки системы-20230728 +

+ D.2. + /lib/lsb/init-functions +
