The rc script is the first script
called by init and initiates the
boot process.
#!/bin/bash ######################################################################## # Begin rc # # Description : Main Run Level Control Script # # Authors : Gerard Beekmans - [email protected] # : DJ Lucas - [email protected] # Update : Bruce Dubbs - [email protected] # # Version : LFS 7.0 # ######################################################################## . /lib/lsb/init-functions print_error_msg() { log_failure_msg # $i is set when called MSG="FAILURE:\n\nYou should not be reading this error message.\n\n" MSG="${MSG}It means that an unforeseen error took place in\n" MSG="${MSG}${i},\n" MSG="${MSG}which exited with a return value of ${error_value}.\n" MSG="${MSG}If you're able to track this error down to a bug in one of\n" MSG="${MSG}the files provided by the files provided by\n" MSG="${MSG}the ${DISTRO_MINI} book, please be so kind to inform us at\n" MSG="${MSG}${DISTRO_CONTACT}.\n" log_failure_msg "${MSG}" log_info_msg "Press Enter to continue..." wait_for_user } check_script_status() { # $i is set when called if [ ! -f ${i} ]; then log_warning_msg "${i} is not a valid symlink." continue fi if [ ! -x ${i} ]; then log_warning_msg "${i} is not executable, skipping." continue fi } run() { if [ -z $interactive ]; then ${1} ${2} return $? fi while true; do read -p "Run ${1} ${2} (Yes/no/continue)? " -n 1 runit echo case ${runit} in c | C) interactive="" ${i} ${2} ret=${?} break; ;; n | N) return 0 ;; y | Y) ${i} ${2} ret=${?} break ;; esac done return $ret } # Read any local settings/overrides [ -r /etc/sysconfig/rc.site ] && source /etc/sysconfig/rc.site DISTRO=${DISTRO:-"Linux From Scratch"} DISTRO_CONTACT=${DISTRO_CONTACT:-"[email protected] (Registration required)"} DISTRO_MINI=${DISTRO_MINI:-"LFS"} IPROMPT=${IPROMPT:-"no"} # These 3 signals will not cause our script to exit trap "" INT QUIT TSTP [ "${1}" != "" ] && runlevel=${1} if [ "${runlevel}" == "" ]; then echo "Usage: ${0} <runlevel>" >&2 exit 1 fi previous=${PREVLEVEL} [ "${previous}" == "" ] && previous=N if [ ! -d /etc/rc.d/rc${runlevel}.d ]; then log_info_msg "/etc/rc.d/rc${runlevel}.d does not exist.\n" exit 1 fi if [ "$runlevel" == "6" -o "$runlevel" == "0" ]; then IPROMPT="no"; fi # Note: In ${LOGLEVEL:-7}, it is ':' 'dash' '7', not minus 7 if [ "$runlevel" == "S" ]; then [ -r /etc/sysconfig/console ] && source /etc/sysconfig/console dmesg -n "${LOGLEVEL:-7}" fi if [ "${IPROMPT}" == "yes" -a "${runlevel}" == "S" ]; then # The total length of the distro welcome string, without escape codes wlen=${wlen:-$(echo "Welcome to ${DISTRO}" | wc -c )} welcome_message=${welcome_message:-"Welcome to ${INFO}${DISTRO}${NORMAL}"} # The total length of the interactive string, without escape codes ilen=${ilen:-$(echo "Press 'I' to enter interactive startup" | wc -c )} i_message=${i_message:-"Press '${FAILURE}I${NORMAL}' to enter interactive startup"} # dcol and icol are spaces before the message to center the message # on screen. itime is the amount of wait time for the user to press a key wcol=$(( ( ${COLUMNS} - ${wlen} ) / 2 )) icol=$(( ( ${COLUMNS} - ${ilen} ) / 2 )) itime=${itime:-"3"} echo -e "\n\n" echo -e "\\033[${wcol}G${welcome_message}" echo -e "\\033[${icol}G${i_message}${NORMAL}" echo "" read -t "${itime}" -n 1 interactive 2>&1 > /dev/null fi # Make lower case [ "${interactive}" == "I" ] && interactive="i" [ "${interactive}" != "i" ] && interactive="" # Read the state file if it exists from runlevel S [ -r /var/run/interactive ] && source /var/run/interactive # Attempt to stop all services started by the previous runlevel, # and killed in this runlevel if [ "${previous}" != "N" ]; then for i in $(ls -v /etc/rc.d/rc${runlevel}.d/K* 2> /dev/null) do check_script_status suffix=${i#/etc/rc.d/rc$runlevel.d/K[0-9][0-9]} prev_start=/etc/rc.d/rc$previous.d/S[0-9][0-9]$suffix sysinit_start=/etc/rc.d/rcS.d/S[0-9][0-9]$suffix if [ "${runlevel}" != "0" -a "${runlevel}" != "6" ]; then if [ ! -f ${prev_start} -a ! -f ${sysinit_start} ]; then MSG="WARNING:\n\n${i} can't be " MSG="${MSG}executed because it was not " MSG="${MSG}not started in the previous " MSG="${MSG}runlevel (${previous})." log_warning_msg "$MSG" continue fi fi run ${i} stop error_value=${?} if [ "${error_value}" != "0" ]; then print_error_msg; fi done fi if [ "${previous}" == "N" ]; then export IN_BOOT=1; fi if [ "$runlevel" == "6" -a -n "${FASTBOOT}" ]; then touch /fastboot fi # Start all functions in this runlevel for i in $( ls -v /etc/rc.d/rc${runlevel}.d/S* 2> /dev/null) do if [ "${previous}" != "N" ]; then suffix=${i#/etc/rc.d/rc$runlevel.d/S[0-9][0-9]} stop=/etc/rc.d/rc$runlevel.d/K[0-9][0-9]$suffix prev_start=/etc/rc.d/rc$previous.d/S[0-9][0-9]$suffix [ -f ${prev_start} -a ! -f ${stop} ] && continue fi check_script_status case ${runlevel} in 0|6) run ${i} stop ;; *) run ${i} start ;; esac error_value=${?} if [ "${error_value}" != "0" ]; then print_error_msg; fi done # Store interactive variable on switch from runlevel S and remove if not if [ "${runlevel}" == "S" -a "${interactive}" == "i" ]; then echo "interactive=\"i\"" > /var/run/interactive else rm -f /var/run/interactive 2> /dev/null fi # Copy the boot log on initial boot only if [ "${previous}" == "N" -a "${runlevel}" != "S" ]; then cat $BOOTLOG >> /var/log/boot.log # Mark the end of boot echo "--------" >> /var/log/boot.log # Remove the temporary file rm -f $BOOTLOG 2> /dev/null fi # End rc