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[操作系统]Linux学习:rc.sysinit


下面贴出的是centos6.5 /etc/rc.sysinit文件内容

#!/bin/bash## /etc/rc.d/rc.sysinit - run once at boot time## Taken in part from Miquel van Smoorenburg's bcheckrc.#HOSTNAME=$(/bin/hostname)set -mif [ -f /etc/sysconfig/network ]; then . /etc/sysconfig/networkfiif [ -z "$HOSTNAME" -o "$HOSTNAME" = "(none)" ]; then HOSTNAME=localhostfiif [ ! -e /proc/mounts ]; then mount -n -t proc /proc /proc mount -n -t sysfs /sys /sys >/dev/null 2>&1fiif [ ! -d /proc/bus/usb ]; then modprobe usbcore >/dev/null 2>&1 && mount -n -t usbfs /proc/bus/usb /proc/bus/usbelse mount -n -t usbfs /proc/bus/usb /proc/bus/usbfi#remount /dev/shm to set attributes from fstab #669700mount -n -o remount /dev/shm >/dev/null 2>&1#remount /proc to set attributes from fstab #984003mount -n -o remount /proc >/dev/null 2>&1. /etc/init.d/functionsPLYMOUTH=[ -x /bin/plymouth ] && PLYMOUTH=yes# Check SELinux statusSELINUX_STATE=if [ -e "/selinux/enforce" ] && [ "$(cat /proc/self/attr/current)" != "kernel" ]; then if [ -r "/selinux/enforce" ] ; then SELINUX_STATE=$(cat "/selinux/enforce") else # assume enforcing if you can't read it SELINUX_STATE=1 fifiif [ -n "$SELINUX_STATE" -a -x /sbin/restorecon ] && __fgrep " /dev " /proc/mounts >/dev/null 2>&1 ; then /sbin/restorecon -R -F /dev 2>/dev/nullfidisable_selinux() { echo $"*** Warning -- SELinux is active" echo $"*** Disabling security enforcement for system recovery." echo $"*** Run 'setenforce 1' to reenable." echo "0" > "/selinux/enforce"}relabel_selinux() { # if /sbin/init is not labeled correctly this process is running in the # wrong context, so a reboot will be required after relabel AUTORELABEL= . /etc/selinux/config echo "0" > /selinux/enforce [ -n "$PLYMOUTH" ] && plymouth --hide-splash if [ "$AUTORELABEL" = "0" ]; then echo echo $"*** Warning -- SELinux ${SELINUXTYPE} policy relabel is required. " echo $"*** /etc/selinux/config indicates you want to manually fix labeling" echo $"*** problems. Dropping you to a shell; the system will reboot" echo $"*** when you leave the shell." start rcS-emergency else echo echo $"*** Warning -- SELinux ${SELINUXTYPE} policy relabel is required." echo $"*** Relabeling could take a very long time, depending on file" echo $"*** system size and speed of hard drives." /sbin/fixfiles -F restore > /dev/null 2>&1 fi rm -f /.autorelabel echo $"Unmounting file systems" umount -a mount -n -o remount,ro / echo $"Automatic reboot in progress." reboot -f}# Print a text banner.echo -en $"\t\tWelcome to "read -r system_release < /etc/system-releaseif [[ "$system_release" == *"Red Hat"* ]]; then [ "$BOOTUP" = "color" ] && echo -en "\\033[0;31m" echo -en "Red Hat" [ "$BOOTUP" = "color" ] && echo -en "\\033[0;39m" PRODUCT=$(sed "s/Red Hat \(.*\) release.*/\1/" /etc/system-release) echo " $PRODUCT"elif [[ "$system_release" == *Fedora* ]]; then [ "$BOOTUP" = "color" ] && echo -en "\\033[0;34m" echo -en "Fedora" [ "$BOOTUP" = "color" ] && echo -en "\\033[0;39m" PRODUCT=$(sed "s/Fedora \(.*\) \?release.*/\1/" /etc/system-release) echo " $PRODUCT"elif [[ "$system_release" =~ "CentOS" ]]; then [ "$BOOTUP" = "color" ] && echo -en "\\033[0;36m" echo -en "CentOS" [ "$BOOTUP" = "color" ] && echo -en "\\033[0;39m" PRODUCT=$(sed "s/CentOS \(.*\) \?release.*/\1/" /etc/system-release) echo " $PRODUCT"else PRODUCT=$(sed "s/ release.*//g" /etc/system-release) echo "$PRODUCT"fi# Only read this once.cmdline=$(cat /proc/cmdline)# Initialize hardwareif [ -f /proc/sys/kernel/modprobe ]; then if ! strstr "$cmdline" nomodules && [ -f /proc/modules ] ; then sysctl -w kernel.modprobe="/sbin/modprobe" >/dev/null 2>&1 else # We used to set this to NULL, but that causes 'failed to exec' messages" sysctl -w kernel.modprobe="/bin/true" >/dev/null 2>&1 fifitouch /dev/.in_sysinit >/dev/null 2>&1# Set default affinityif [ -x /bin/taskset ]; then if strstr "$cmdline" default_affinity= ; then for arg in $cmdline ; do if [ "${arg##default_affinity=}" != "${arg}" ]; then /bin/taskset -p ${arg##default_affinity=} 1 fi done fifinashpid=$(pidof nash 2>/dev/null)[ -n "$nashpid" ] && kill $nashpid >/dev/null 2>&1unset nashpid/sbin/start_udev# Load other user-defined modulesfor file in /etc/sysconfig/modules/*.modules ; do [ -x $file ] && $filedone# Load modules (for backward compatibility with VARs)if [ -f /etc/rc.modules ]; then /etc/rc.modulesfimount -n /dev/pts >/dev/null 2>&1[ -n "$SELINUX_STATE" ] && restorecon -F /dev/pts >/dev/null 2>&1# Configure kernel parametersupdate_boot_stage RCkernelparamapply_sysctl# Set the hostname.update_boot_stage RChostnameaction $"Setting hostname ${HOSTNAME}: " hostname ${HOSTNAME}[ -n "${NISDOMAIN}" ] && domainname ${NISDOMAIN}# Sync waiting for storage.{ rmmod scsi_wait_scan ; modprobe scsi_wait_scan ; rmmod scsi_wait_scan ; } >/dev/null 2>&1# Device mapper & related initializationif ! __fgrep "device-mapper" /proc/devices >/dev/null 2>&1 ; then modprobe dm-mod >/dev/null 2>&1fiif [ -f /etc/crypttab ]; then init_crypto 0fiif ! strstr "$cmdline" nompath && [ -f /etc/multipath.conf -a \ -x /sbin/multipath ]; then modprobe dm-multipath > /dev/null 2>&1 /sbin/multipath -v 0 if [ -x /sbin/kpartx ]; then /sbin/dmsetup ls --target multipath --exec "/sbin/kpartx -a -p p" >/dev/null fifiif ! strstr "$cmdline" nodmraid && [ -x /sbin/dmraid ]; then modprobe dm-mirror >/dev/null 2>&1 dmraidsets=$(LC_ALL=C /sbin/dmraid -s -c -i) if [ "$?" = "0" ]; then for dmname in $dmraidsets; do if [[ "$dmname" == isw_* ]] && \ ! strstr "$cmdline" noiswmd; then continue fi /sbin/dmraid -ay -i --rm_partitions -p "$dmname" >/dev/null 2>&1 /sbin/kpartx -a -p p "/dev/mapper/$dmname" done fifi# Start any MD RAID arrays that haven't been started yet[ -r /proc/mdstat -a -r /dev/md/md-device-map ] && /sbin/mdadm -IRsif [ -x /sbin/lvm ]; then if [ ! -f /.nolvm ] && ! strstr "$cmdline" nolvm ; then action $"Setting up Logical Volume Management:" /sbin/lvm vgchange -a ay --sysinit else echo $"Logical Volume Management disabled at boot." fifiif [ -f /etc/crypttab ]; then init_crypto 0fiif [ -f /fastboot ] || strstr "$cmdline" fastboot ; then fastboot=yesfiif [ -f /fsckoptions ]; then fsckoptions=$(cat /fsckoptions)fiif [ -f /forcefsck ] || strstr "$cmdline" forcefsck ; then fsckoptions="-f $fsckoptions"elif [ -f /.autofsck ]; then [ -f /etc/sysconfig/autofsck ] && . /etc/sysconfig/autofsck if [ "$AUTOFSCK_DEF_CHECK" = "yes" ]; then AUTOFSCK_OPT="$AUTOFSCK_OPT -f" fi if [ -n "$AUTOFSCK_SINGLEUSER" ]; then [ -n "$PLYMOUTH" ] && plymouth --hide-splash echo echo $"*** Warning -- the system did not shut down cleanly. " echo $"*** Dropping you to a shell; the system will continue" echo $"*** when you leave the shell." [ -n "$SELINUX_STATE" ] && echo "0" > /selinux/enforce start rcS-emergency [ -n "$SELINUX_STATE" ] && echo "1" > /selinux/enforce [ -n "$PLYMOUTH" ] && plymouth --show-splash fi fsckoptions="$AUTOFSCK_OPT $fsckoptions"fiif [ "$BOOTUP" = "color" ]; then fsckoptions="-C $fsckoptions"else fsckoptions="-V $fsckoptions"fiREADONLY=if [ -f /etc/sysconfig/readonly-root ]; then . /etc/sysconfig/readonly-rootfiif strstr "$cmdline" readonlyroot ; then READONLY=yes [ -z "$RW_MOUNT" ] && RW_MOUNT=/var/lib/stateless/writable [ -z "$STATE_MOUNT" ] && STATE_MOUNT=/var/lib/stateless/statefiif strstr "$cmdline" noreadonlyroot ; then READONLY=nofiif [ "$READONLY" = "yes" -o "$TEMPORARY_STATE" = "yes" ]; then mount_empty() { if [ -e "$1" ]; then echo "$1" | cpio -p -vd "$RW_MOUNT" &>/dev/null mount -n --bind "$RW_MOUNT$1" "$1" fi } mount_dirs() { if [ -e "$1" ]; then mkdir -p "$RW_MOUNT$1" find "$1" -type d -print0 | cpio -p -0vd "$RW_MOUNT" &>/dev/null mount -n --bind "$RW_MOUNT$1" "$1" fi } mount_files() { if [ -e "$1" ]; then cp -a --parents "$1" "$RW_MOUNT" mount -n --bind "$RW_MOUNT$1" "$1" fi } # Common mount options for scratch space regardless of # type of backing store mountopts= # Scan partitions for local scratch storage rw_mount_dev=$(blkid -t LABEL="$RW_LABEL" -l -o device) # First try to mount scratch storage from /etc/fstab, then any # partition with the proper label. If either succeeds, be sure # to wipe the scratch storage clean. If both fail, then mount # scratch storage via tmpfs. if mount $mountopts "$RW_MOUNT" > /dev/null 2>&1 ; then rm -rf "$RW_MOUNT" > /dev/null 2>&1 elif [ x$rw_mount_dev != x ] && mount $rw_mount_dev $mountopts "$RW_MOUNT" > /dev/null 2>&1; then rm -rf "$RW_MOUNT" > /dev/null 2>&1 else mount -n -t tmpfs $RW_OPTIONS $mountopts none "$RW_MOUNT" fi for file in /etc/rwtab /etc/rwtab.d/* /dev/.initramfs/rwtab ; do is_ignored_file "$file" && continue [ -f $file ] && cat $file | while read type path ; do case "$type" in empty) mount_empty $path ;; files) mount_files $path ;; dirs) mount_dirs $path ;; *) ;; esac [ -n "$SELINUX_STATE" -a -e "$path" ] && restorecon -R "$path" done done # Use any state passed by initramfs [ -d /dev/.initramfs/state ] && cp -a /dev/.initramfs/state/* $RW_MOUNT # In theory there should be no more than one network interface active # this early in the boot process -- the one we're booting from. # Use the network address to set the hostname of the client. This # must be done even if we have local storage. ipaddr= if [ "$HOSTNAME" = "localhost" -o "$HOSTNAME" = "localhost.localdomain" ]; then ipaddr=$(ip addr show to 0.0.0.0/0 scope global | awk '/[[:space:]]inet / { print gensub("/.*","","g",$2) }') for ip in $ipaddr ; do HOSTNAME= eval $(ipcalc -h $ip 2>/dev/null) [ -n "$HOSTNAME" ] && { hostname ${HOSTNAME} ; break; } done fi # Clients with read-only root filesystems may be provided with a # place where they can place minimal amounts of persistent # state. SSH keys or puppet certificates for example. # # Ideally we'll use puppet to manage the state directory and to # create the bind mounts. However, until that's all ready this # is sufficient to build a working system. # First try to mount persistent data from /etc/fstab, then any # partition with the proper label, then fallback to NFS state_mount_dev=$(blkid -t LABEL="$STATE_LABEL" -l -o device) if mount $mountopts $STATE_OPTIONS "$STATE_MOUNT" > /dev/null 2>&1 ; then /bin/true elif [ x$state_mount_dev != x ] && mount $state_mount_dev $mountopts "$STATE_MOUNT" > /dev/null 2>&1; then /bin/true elif [ ! -z "$CLIENTSTATE" ]; then # No local storage was found. Make a final attempt to find # state on an NFS server. mount -t nfs $CLIENTSTATE/$HOSTNAME $STATE_MOUNT -o rw,nolock fi if [ -w "$STATE_MOUNT" ]; then mount_state() { if [ -e "$1" ]; then [ ! -e "$STATE_MOUNT$1" ] && cp -a --parents "$1" "$STATE_MOUNT" mount -n --bind "$STATE_MOUNT$1" "$1" fi } for file in /etc/statetab /etc/statetab.d/* ; do is_ignored_file "$file" && continue [ ! -f "$file" ] && continue if [ -f "$STATE_MOUNT/$file" ] ; then mount -n --bind "$STATE_MOUNT/$file" "$file" fi for path in $(grep -v "^#" "$file" 2>/dev/null); do mount_state "$path" [ -n "$SELINUX_STATE" -a -e "$path" ] && restorecon -R "$path" done done if [ -f "$STATE_MOUNT/files" ] ; then for path in $(grep -v "^#" "$STATE_MOUNT/files" 2>/dev/null); do mount_state "$path" [ -n "$SELINUX_STATE" -a -e "$path" ] && restorecon -R "$path" done fi fifiif [[ " $fsckoptions" != *" -y"* ]]; then fsckoptions="-a $fsckoptions"fi_RUN_QUOTACHECK=0if [ -f /forcequotacheck ] || strstr "$cmdline" forcequotacheck ; then _RUN_QUOTACHECK=1fiif [ -z "$fastboot" -a "$READONLY" != "yes" ]; then STRING=$"Checking filesystems" echo $STRING fsck -T -t noopts=_netdev -A $fsckoptions rc=$? if [ "$rc" -eq "0" ]; then success "$STRING" echo elif [ "$rc" -eq "1" ]; then passed "$STRING" echo elif [ "$rc" -eq "2" -o "$rc" -eq "3" ]; then echo $"Unmounting file systems" umount -a mount -n -o remount,ro / echo $"Automatic reboot in progress." reboot -f fi # A return of 4 or higher means there were serious problems. if [ $rc -gt 1 ]; then [ -n "$PLYMOUTH" ] && plymouth --hide-splash failure "$STRING" echo echo echo $"*** An error occurred during the file system check." echo $"*** Dropping you to a shell; the system will reboot" echo $"*** when you leave the shell." str=$"(Repair filesystem)" PS1="$str \# # "; export PS1 [ "$SELINUX_STATE" = "1" ] && disable_selinux start rcS-emergency echo $"Unmounting file systems" umount -a mount -n -o remount,ro / echo $"Automatic reboot in progress." reboot -f elif [ "$rc" -eq "1" ]; then _RUN_QUOTACHECK=1 fifiremount_needed() { local state oldifs [ "$READONLY" = "yes" ] && return 1 state=$(LC_ALL=C awk '/ \/ / && ($3 !~ /rootfs/) { print $4 }' /proc/mounts) oldifs=$IFS IFS="," for opt in $state ; do if [ "$opt" = "rw" ]; then IFS=$oldifs return 1 fi done IFS=$oldifs return 0}# Remount the root filesystem read-write.update_boot_stage RCmountfsif remount_needed ; then action $"Remounting root filesystem in read-write mode: " mount -n -o remount,rw /fi# Clean up SELinux labelsif [ -n "$SELINUX_STATE" ]; then restorecon /etc/mtab /etc/ld.so.cache /etc/blkid/blkid.tab /etc/resolv.conf >/dev/null 2>&1fi# If relabeling, relabel mount points.if [ -n "$SELINUX_STATE" -a "$READONLY" != "yes" ]; then if [ -f /.autorelabel ] || strstr "$cmdline" autorelabel ; then restorecon $(awk '!/^#/ && $4 !~ /noauto/ && $2 ~ /^\// { print $2 }' /etc/fstab) >/dev/null 2>&1 fifiif [ "$READONLY" != "yes" ] ; then # Clear mtab (> /etc/mtab) &> /dev/null # Remove stale backups rm -f /etc/mtab~ /etc/mtab~~ # Enter mounted filesystems into /etc/mtab mount -f / mount -f /proc >/dev/null 2>&1 mount -f /sys >/dev/null 2>&1 mount -f /dev/pts >/dev/null 2>&1 mount -f /dev/shm >/dev/null 2>&1 mount -f /proc/bus/usb >/dev/null 2>&1fi# Mount all other filesystems (except for NFS and /proc, which is already# mounted). Contrary to standard usage,# filesystems are NOT unmounted in single user mode.# The 'no' applies to all listed filesystem types. See mount(8).if [ "$READONLY" != "yes" ] ; then action $"Mounting local filesystems: " mount -a -t nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdevelse action $"Mounting local filesystems: " mount -a -n -t nonfs,nfs4,smbfs,ncpfs,cifs,gfs,gfs2 -O no_netdevfi# Update quotas if necessaryif [ X"$_RUN_QUOTACHECK" = X1 -a -x /sbin/quotacheck ]; then action $"Checking local filesystem quotas: " /sbin/quotacheck -anugfiif [ -x /sbin/quotaon ]; then action $"Enabling local filesystem quotas: " /sbin/quotaon -augfi# Check to see if a full relabel is neededif [ -n "$SELINUX_STATE" -a "$READONLY" != "yes" ]; then if [ -f /.autorelabel ] || strstr "$cmdline" autorelabel ; then relabel_selinux fielse if [ -d /etc/selinux -a "$READONLY" != "yes" ]; then [ -f /.autorelabel ] || touch /.autorelabel fifi# Initialize pseudo-random number generatorif [ -f "/var/lib/random-seed" ]; then cat /var/lib/random-seed > /dev/urandomelse [ "$READONLY" != "yes" ] && touch /var/lib/random-seedfiif [ "$READONLY" != "yes" ]; then chmod 600 /var/lib/random-seed dd if=/dev/urandom of=/var/lib/random-seed count=1 bs=512 2>/dev/nullfiif [ -f /etc/crypttab ]; then init_crypto 1fi# Configure machine if necessary.if [ -f /.unconfigured ]; then if [ -x /bin/plymouth ]; then /bin/plymouth quit fi if [ -x /usr/bin/system-config-keyboard ]; then /usr/bin/system-config-keyboard fi if [ -x /usr/bin/passwd ]; then /usr/bin/passwd root fi if [ -x /usr/sbin/system-config-network-tui ]; then /usr/sbin/system-config-network-tui fi if [ -x /usr/sbin/timeconfig ]; then /usr/sbin/timeconfig fi if [ -x /usr/sbin/authconfig-tui ]; then /usr/sbin/authconfig-tui --nostart fi if [ -x /usr/sbin/ntsysv ]; then /usr/sbin/ntsysv --level 35 fi # Reread in network configuration data. if [ -f /etc/sysconfig/network ]; then . /etc/sysconfig/network # Reset the hostname. action $"Resetting hostname ${HOSTNAME}: " hostname ${HOSTNAME} fi rm -f /.unconfiguredfi# Clean out /.rm -f /fastboot /fsckoptions /forcefsck /.autofsck /forcequotacheck /halt \ /poweroff /.suspended &> /dev/null# Do we need (w|u)tmpx files? We don't set them up, but the sysadmin might..._NEED_XFILES=[ -f /var/run/utmpx -o -f /var/log/wtmpx ] && _NEED_XFILES=1# Clean up /var.rm -rf /var/lock/cvs/* /var/run/screen/*find /var/lock /var/run ! -type d -exec rm -f {} \;rm -f /var/lib/rpm/__db* &> /dev/nullrm -f /var/gdm/.gdmfifo &> /dev/null[ "$PROMPT" != no ] && plymouth watch-keystroke --command "touch /var/run/confirm" --keys=Ii &# Clean up utmp/wtmp> /var/run/utmptouch /var/log/wtmpchgrp utmp /var/run/utmp /var/log/wtmpchmod 0664 /var/run/utmp /var/log/wtmpif [ -n "$_NEED_XFILES" ]; then > /var/run/utmpx touch /var/log/wtmpx chgrp utmp /var/run/utmpx /var/log/wtmpx chmod 0664 /var/run/utmpx /var/log/wtmpxfi[ -n "$SELINUX_STATE" ] && restorecon /var/run/utmp* /var/log/wtmp* >/dev/null 2>&1# Clean up various /tmp bits[ -n "$SELINUX_STATE" ] && restorecon /tmprm -f /tmp/.X*-lock /tmp/.lock.* /tmp/.gdm_socket /tmp/.s.PGSQL.*rm -rf /tmp/.X*-unix /tmp/.ICE-unix /tmp/.font-unix /tmp/hsperfdata_* \ /tmp/kde-* /tmp/ksocket-* /tmp/mc-* /tmp/mcop-* /tmp/orbit-* \ /tmp/scrollkeeper-* /tmp/ssh-* \ /dev/.in_sysinit# Make ICE directorymkdir -m 1777 -p /tmp/.ICE-unix >/dev/null 2>&1chown root:root /tmp/.ICE-unix[ -n "$SELINUX_STATE" ] && restorecon /tmp/.ICE-unix >/dev/null 2>&1# Start up swapping.update_boot_stage RCswapaction $"Enabling /etc/fstab swaps: " swapon -a -eif [ "$AUTOSWAP" = "yes" ]; then curswap=$(awk '/^\/dev/ { print $1 }' /proc/swaps | while read x; do get_numeric_dev dec $x ; echo -n " "; done) swappartitions=$(blkid -t TYPE=swap -o device) if [ x"$swappartitions" != x ]; then for partition in $swappartitions ; do [ ! -e $partition ] && continue majmin=$(get_numeric_dev dec $partition) echo $curswap | grep -qw "$majmin" || action $"Enabling local swap partitions: " swapon $partition done fifi# Set up binfmt_misc/bin/mount -t binfmt_misc none /proc/sys/fs/binfmt_misc > /dev/null 2>&1# Boot time profiles. Yes, this should be somewhere else.if [ -x /usr/sbin/system-config-network-cmd ]; then if strstr "$cmdline" netprofile= ; then for arg in $cmdline ; do if [ "${arg##netprofile=}" != "${arg}" ]; then /usr/sbin/system-config-network-cmd --profile ${arg##netprofile=} fi done fifi# Now that we have all of our basic modules loaded and the kernel going,# let's dump the syslog ring somewhere so we can find it later[ -f /var/log/dmesg ] && mv -f /var/log/dmesg /var/log/dmesg.olddmesg -s 131072 > /var/log/dmesg# create the crash indicator flag to warn on crashes, offer fsck with timeouttouch /.autofsck &> /dev/null[ "$PROMPT" != no ] && plymouth --ignore-keystroke=Iiif strstr "$cmdline" confirm ; then touch /var/run/confirmfi# Let rhgb know that we're leaving rc.sysinitif [ -x /bin/plymouth ]; then /bin/plymouth --sysinitfi