files/rhel-initd-functions.sh
# -*-Shell-script-*-
#
# functions This file contains functions to be used by most or all
# shell scripts in the /etc/init.d directory.
#
TEXTDOMAIN=initscripts
# Make sure umask is sane
umask 022
# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH
# Get a sane screen width
[ -z "${COLUMNS:-}" ] && COLUMNS=80
[ -z "${CONSOLETYPE:-}" ] && CONSOLETYPE="$(/sbin/consoletype)"
if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" -a -z "${LANGSH_SOURCED:-}" ] ; then
. /etc/profile.d/lang.sh 2>/dev/null
# avoid propagating LANGSH_SOURCED any further
unset LANGSH_SOURCED
fi
# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
if [ -f /etc/sysconfig/init ]; then
. /etc/sysconfig/init
else
# This all seem confusing? Look in /etc/sysconfig/init,
# or in /usr/doc/initscripts-*/sysconfig.txt
BOOTUP=color
RES_COL=60
MOVE_TO_COL="echo -en \\033[${RES_COL}G"
SETCOLOR_SUCCESS="echo -en \\033[1;32m"
SETCOLOR_FAILURE="echo -en \\033[1;31m"
SETCOLOR_WARNING="echo -en \\033[1;33m"
SETCOLOR_NORMAL="echo -en \\033[0;39m"
LOGLEVEL=1
fi
if [ "$CONSOLETYPE" = "serial" ]; then
BOOTUP=serial
MOVE_TO_COL=
SETCOLOR_SUCCESS=
SETCOLOR_FAILURE=
SETCOLOR_WARNING=
SETCOLOR_NORMAL=
fi
fi
# Interpret escape sequences in an fstab entry
fstab_decode_str() {
fstab-decode echo "$1"
}
# Check if any of $pid (could be plural) are running
checkpid() {
local i
for i in $* ; do
[ -d "/proc/$i" ] && return 0
done
return 1
}
__readlink() {
ls -bl "$@" 2>/dev/null| awk '{ print $NF }'
}
__fgrep() {
s=$1
f=$2
while read line; do
if strstr "$line" "$s"; then
echo $line
return 0
fi
done < $f
return 1
}
# __umount_loop awk_program fstab_file first_msg retry_msg retry_umount_args
# awk_program should process fstab_file and return a list of fstab-encoded
# paths; it doesn't have to handle comments in fstab_file.
__umount_loop() {
local remaining sig=
local retry=3 count
remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
while [ -n "$remaining" -a "$retry" -gt 0 ]; do
if [ "$retry" -eq 3 ]; then
action "$3" fstab-decode umount $remaining
else
action "$4" fstab-decode umount $5 $remaining
fi
count=4
remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
while [ "$count" -gt 0 ]; do
[ -z "$remaining" ] && break
count=$(($count-1))
usleep 500000
remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
done
[ -z "$remaining" ] && break
kill $sig $(fstab-decode /sbin/fuser -m $remaining 2>/dev/null | sed -e "s/\b$$\b//g") > /dev/null
sleep 3
retry=$(($retry -1))
sig=-9
done
}
# Similar to __umount loop above, specialized for loopback devices
__umount_loopback_loop() {
local remaining devremaining sig=
local retry=3
remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
while [ -n "$remaining" -a "$retry" -gt 0 ]; do
if [ "$retry" -eq 3 ]; then
action $"Unmounting loopback filesystems: " \
fstab-decode umount $remaining
else
action $"Unmounting loopback filesystems (retry):" \
fstab-decode umount $remaining
fi
for dev in $devremaining ; do
losetup $dev > /dev/null 2>&1 && \
action $"Detaching loopback device $dev: " \
losetup -d $dev
done
remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
[ -z "$remaining" ] && break
fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
sleep 3
retry=$(($retry -1))
sig=-9
done
}
# __proc_pids {program} [pidfile]
# Set $pid to pids from /var/run* for {program}. $pid should be declared
# local in the caller.
# Returns LSB exit code for the 'status' action.
__pids_var_run() {
local base=${1##*/}
local pid_file=${2:-/var/run/$base.pid}
local pid_dir=$(/usr/bin/dirname $pid_file)
local binary=$3
[ -d "$pid_dir" -a ! -r "$pid_dir" ] && return 4
pid=
if [ -f "$pid_file" ] ; then
local line p
[ ! -r "$pid_file" ] && return 4 # "user had insufficient privilege"
while : ; do
read line
[ -z "$line" ] && break
for p in $line ; do
if [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] ; then
if [ -n "$binary" ] ; then
local b=$(readlink /proc/$p/exe | sed -e 's/\s*(deleted)$//')
[ "$b" != "$binary" ] && continue
fi
pid="$pid $p"
fi
done
done < "$pid_file"
if [ -n "$pid" ]; then
return 0
fi
return 1 # "Program is dead and /var/run pid file exists"
fi
return 3 # "Program is not running"
}
# Output PIDs of matching processes, found using pidof
__pids_pidof() {
pidof -c -o $$ -o $PPID -o %PPID -x "$1" || \
pidof -c -o $$ -o $PPID -o %PPID -x "${1##*/}"
}
# A function to start a program.
daemon() {
# Test syntax.
local gotbase= force= nicelevel corelimit
local pid base= user= nice= bg= pid_file=
local cgroup=
nicelevel=0
while [ "$1" != "${1##[-+]}" ]; do
case $1 in
'') echo $"$0: Usage: daemon [+/-nicelevel] {program}"
return 1;;
--check)
base=$2
gotbase="yes"
shift 2
;;
--check=?*)
base=${1#--check=}
gotbase="yes"
shift
;;
--user)
user=$2
shift 2
;;
--user=?*)
user=${1#--user=}
shift
;;
--pidfile)
pid_file=$2
shift 2
;;
--pidfile=?*)
pid_file=${1#--pidfile=}
shift
;;
--force)
force="force"
shift
;;
[-+][0-9]*)
nice="nice -n $1"
shift
;;
*) echo $"$0: Usage: daemon [+/-nicelevel] {program}"
return 1;;
esac
done
# Save basename.
[ -z "$gotbase" ] && base=${1##*/}
# See if it's already running. Look *only* at the pid file.
__pids_var_run "$base" "$pid_file"
[ -n "$pid" -a -z "$force" ] && return
# make sure it doesn't core dump anywhere unless requested
corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"
# if they set NICELEVEL in /etc/sysconfig/foo, honor it
[ -n "${NICELEVEL:-}" ] && nice="nice -n $NICELEVEL"
# if they set CGROUP_DAEMON in /etc/sysconfig/foo, honor it
if [ -n "${CGROUP_DAEMON}" ]; then
if [ ! -x /bin/cgexec ]; then
echo -n "Cgroups not installed"; warning
echo
else
cgroup="/bin/cgexec";
for i in $CGROUP_DAEMON; do
cgroup="$cgroup -g $i";
done
fi
fi
# Echo daemon
[ "${BOOTUP:-}" = "verbose" -a -z "${LSB:-}" ] && echo -n " $base"
# And start it up.
if [ -z "$user" ]; then
$cgroup $nice /bin/bash -c "$corelimit >/dev/null 2>&1 ; $*"
else
$cgroup $nice runuser -s /bin/bash $user -c "$corelimit >/dev/null 2>&1 ; $*"
fi
[ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"
}
# A function to stop a program.
killproc() {
local RC killlevel= base pid pid_file= delay try binary=
RC=0; delay=3; try=0
# Test syntax.
if [ "$#" -eq 0 ]; then
echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
if [ "$1" = "-b" ]; then
if [ -z $pid_file ]; then
echo $"-b option can be used only with -p"
echo $"Usage: killproc -p pidfile -b binary program"
return 1
fi
binary=$2
shift 2
fi
if [ "$1" = "-d" ]; then
delay=$(echo $2 | awk -v RS=' ' -v IGNORECASE=1 '{if($1!~/^[0-9.]+[smhd]?$/) exit 1;d=$1~/s$|^[0-9.]*$/?1:$1~/m$/?60:$1~/h$/?60*60:$1~/d$/?24*60*60:-1;if(d==-1) exit 1;delay+=d*$1} END {printf("%d",delay+0.5)}')
if [ "$?" -eq 1 ]; then
echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
return 1
fi
shift 2
fi
# check for second arg to be kill level
[ -n "${2:-}" ] && killlevel=$2
# Save basename.
base=${1##*/}
# Find pid.
__pids_var_run "$1" "$pid_file" "$binary"
RC=$?
if [ -z "$pid" ]; then
if [ -z "$pid_file" ]; then
pid="$(__pids_pidof "$1")"
else
[ "$RC" = "4" ] && { failure $"$base shutdown" ; return $RC ;}
fi
fi
# Kill it.
if [ -n "$pid" ] ; then
[ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
if [ -z "$killlevel" ] ; then
if checkpid $pid 2>&1; then
# TERM first, then KILL if not dead
kill -TERM $pid >/dev/null 2>&1
usleep 100000
if checkpid $pid ; then
try=0
while [ $try -lt $delay ] ; do
checkpid $pid || break
sleep 1
let try+=1
done
if checkpid $pid ; then
kill -KILL $pid >/dev/null 2>&1
usleep 100000
fi
fi
fi
checkpid $pid
RC=$?
[ "$RC" -eq 0 ] && failure $"$base shutdown" || success $"$base shutdown"
RC=$((! $RC))
# use specified level only
else
if checkpid $pid; then
kill $killlevel $pid >/dev/null 2>&1
RC=$?
[ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"
elif [ -n "${LSB:-}" ]; then
RC=7 # Program is not running
fi
fi
else
if [ -n "${LSB:-}" -a -n "$killlevel" ]; then
RC=7 # Program is not running
else
failure $"$base shutdown"
RC=0
fi
fi
# Remove pid file if any.
if [ -z "$killlevel" ]; then
rm -f "${pid_file:-/var/run/$base.pid}"
fi
return $RC
}
# A function to find the pid of a program. Looks *only* at the pidfile
pidfileofproc() {
local pid
# Test syntax.
if [ "$#" = 0 ] ; then
echo $"Usage: pidfileofproc {program}"
return 1
fi
__pids_var_run "$1"
[ -n "$pid" ] && echo $pid
return 0
}
# A function to find the pid of a program.
pidofproc() {
local RC pid pid_file=
# Test syntax.
if [ "$#" = 0 ]; then
echo $"Usage: pidofproc [-p pidfile] {program}"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
fail_code=3 # "Program is not running"
# First try "/var/run/*.pid" files
__pids_var_run "$1" "$pid_file"
RC=$?
if [ -n "$pid" ]; then
echo $pid
return 0
fi
[ -n "$pid_file" ] && return $RC
__pids_pidof "$1" || return $RC
}
status() {
local base pid lock_file= pid_file= binary=
# Test syntax.
if [ "$#" = 0 ] ; then
echo $"Usage: status [-p pidfile] {program}"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
if [ "$1" = "-l" ]; then
lock_file=$2
shift 2
fi
if [ "$1" = "-b" ]; then
if [ -z $pid_file ]; then
echo $"-b option can be used only with -p"
echo $"Usage: status -p pidfile -b binary program"
return 1
fi
binary=$2
shift 2
fi
base=${1##*/}
# First try "pidof"
__pids_var_run "$1" "$pid_file" "$binary"
RC=$?
if [ -z "$pid_file" -a -z "$pid" ]; then
pid="$(__pids_pidof "$1")"
fi
if [ -n "$pid" ]; then
echo $"${base} (pid $pid) is running..."
return 0
fi
case "$RC" in
0)
echo $"${base} (pid $pid) is running..."
return 0
;;
1)
echo $"${base} dead but pid file exists"
return 1
;;
4)
echo $"${base} status unknown due to insufficient privileges."
return 4
;;
esac
if [ -z "${lock_file}" ]; then
lock_file=${base}
fi
# See if /var/lock/subsys/${lock_file} exists
if [ -f /var/lock/subsys/${lock_file} ]; then
echo $"${base} dead but subsys locked"
return 2
fi
echo $"${base} is stopped"
return 3
}
echo_success() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
echo -n $" OK "
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 0
}
echo_failure() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo -n $"FAILED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
echo_passed() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo -n $"PASSED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
echo_warning() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo -n $"WARNING"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
# Inform the graphical boot of our current state
update_boot_stage() {
if [ -x /bin/plymouth ]; then
/bin/plymouth --update="$1"
fi
return 0
}
# Log that something succeeded
success() {
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
return 0
}
# Log that something failed
failure() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_failure
[ -x /bin/plymouth ] && /bin/plymouth --details
return $rc
}
# Log that something passed, but may have had errors. Useful for fsck
passed() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_passed
return $rc
}
# Log a warning
warning() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_warning
return $rc
}
# Run some action. Log its output.
action() {
local STRING rc
STRING=$1
echo -n "$STRING "
shift
"$@" && success $"$STRING" || failure $"$STRING"
rc=$?
echo
return $rc
}
# returns OK if $1 contains $2
strstr() {
[ "${1#*$2*}" = "$1" ] && return 1
return 0
}
# Confirm whether we really want to run this service
confirm() {
[ -x /bin/plymouth ] && /bin/plymouth --hide-splash
while : ; do
echo -n $"Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "
read answer
if strstr $"yY" "$answer" || [ "$answer" = "" ] ; then
return 0
elif strstr $"cC" "$answer" ; then
rm -f /var/run/confirm
[ -x /bin/plymouth ] && /bin/plymouth --show-splash
return 2
elif strstr $"nN" "$answer" ; then
return 1
fi
done
}
# resolve a device node to its major:minor numbers in decimal or hex
get_numeric_dev() {
(
fmt="%d:%d"
if [ "$1" == "hex" ]; then
fmt="%x:%x"
fi
ls -lH "$2" | awk '{ sub(/,/, "", $5); printf("'"$fmt"'", $5, $6); }'
) 2>/dev/null
}
# Check whether file $1 is a backup or rpm-generated file and should be ignored
is_ignored_file() {
case "$1" in
*~ | *.bak | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
return 0
;;
esac
return 1
}
# Evaluate shvar-style booleans
is_true() {
case "$1" in
[tT] | [yY] | [yY][eE][sS] | [tT][rR][uU][eE])
return 0
;;
esac
return 1
}
# Evaluate shvar-style booleans
is_false() {
case "$1" in
[fF] | [nN] | [nN][oO] | [fF][aA][lL][sS][eE])
return 0
;;
esac
return 1
}
# Apply sysctl settings, including files in /etc/sysctl.d
apply_sysctl() {
sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
for file in /etc/sysctl.d/* ; do
is_ignored_file "$file" && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
}
key_is_random() {
[ "$1" = "/dev/urandom" -o "$1" = "/dev/hw_random" \
-o "$1" = "/dev/random" ]
}
find_crypto_mount_point() {
local fs_spec fs_file fs_vfstype remaining_fields
local fs
while read fs_spec fs_file remaining_fields; do
if [ "$fs_spec" = "/dev/mapper/$1" ]; then
echo $fs_file
break;
fi
done < /etc/fstab
}
# Because of a chicken/egg problem, init_crypto must be run twice. /var may be
# encrypted but /var/lib/random-seed is needed to initialize swap.
init_crypto() {
local have_random dst src key opt mode owner params makeswap skip arg opt
local param value rc ret mke2fs mdir prompt mount_point
ret=0
have_random=$1
while read dst src key opt; do
[ -z "$dst" -o "${dst#\#}" != "$dst" ] && continue
[ -b "/dev/mapper/$dst" ] && continue;
if [ "$have_random" = 0 ] && key_is_random "$key"; then
continue
fi
if [ -n "$key" -a "x$key" != "xnone" ]; then
if test -e "$key" ; then
owner=$(ls -l $key | (read a b owner rest; echo $owner))
if ! key_is_random "$key"; then
mode=$(ls -l "$key" | cut -c 5-10)
if [ "$mode" != "------" ]; then
echo $"INSECURE MODE FOR $key"
fi
fi
if [ "$owner" != root ]; then
echo $"INSECURE OWNER FOR $key"
fi
else
echo $"Key file for $dst not found, skipping"
ret=1
continue
fi
else
key=""
fi
params=""
makeswap=""
mke2fs=""
skip=""
# Parse the src field for UUID= and convert to real device names
if [ "${src%%=*}" == "UUID" ]; then
src=$(/sbin/blkid -t "$src" -l -o device)
elif [ "${src/^\/dev\/disk\/by-uuid\/}" != "$src" ]; then
src=$(__readlink $src)
fi
# Is it a block device?
[ -b "$src" ] || continue
# Is it already a device mapper slave? (this is gross)
devesc=${src##/dev/}
devesc=${devesc//\//!}
for d in /sys/block/dm-*/slaves ; do
[ -e $d/$devesc ] && continue 2
done
# Parse the options field, convert to cryptsetup parameters and
# contruct the command line
while [ -n "$opt" ]; do
arg=${opt%%,*}
opt=${opt##$arg}
opt=${opt##,}
param=${arg%%=*}
value=${arg##$param=}
case "$param" in
cipher)
params="$params -c $value"
if [ -z "$value" ]; then
echo $"$dst: no value for cipher option, skipping"
skip="yes"
fi
;;
size)
params="$params -s $value"
if [ -z "$value" ]; then
echo $"$dst: no value for size option, skipping"
skip="yes"
fi
;;
hash)
params="$params -h $value"
if [ -z "$value" ]; then
echo $"$dst: no value for hash option, skipping"
skip="yes"
fi
;;
verify)
params="$params -y"
;;
swap)
makeswap=yes
;;
tmp)
mke2fs=yes
esac
done
if [ "$skip" = "yes" ]; then
ret=1
continue
fi
if [ -z "$makeswap" ] && cryptsetup isLuks "$src" 2>/dev/null ; then
if key_is_random "$key"; then
echo $"$dst: LUKS requires non-random key, skipping"
ret=1
continue
fi
if [ -n "$params" ]; then
echo "$dst: options are invalid for LUKS partitions," \
"ignoring them"
fi
if [ -n "$key" ]; then
/sbin/cryptsetup -d $key luksOpen "$src" "$dst" <&1 2>/dev/null && success || failure
rc=$?
else
mount_point="$(find_crypto_mount_point $dst)"
[ -n "$mount_point" ] || mount_point=${src##*/}
prompt=$(printf $"%s is password protected" "$mount_point")
plymouth ask-for-password --prompt "$prompt" --command="/sbin/cryptsetup luksOpen -T1 $src $dst" <&1
rc=$?
fi
else
[ -z "$key" ] && plymouth --hide-splash
/sbin/cryptsetup $params ${key:+-d $key} create "$dst" "$src" <&1 2>/dev/null && success || failure
rc=$?
[ -z "$key" ] && plymouth --show-splash
fi
if [ $rc -ne 0 ]; then
ret=1
continue
fi
if [ -b "/dev/mapper/$dst" ]; then
if [ "$makeswap" = "yes" ]; then
mkswap "/dev/mapper/$dst" 2>/dev/null >/dev/null
fi
if [ "$mke2fs" = "yes" ]; then
if mke2fs "/dev/mapper/$dst" 2>/dev/null >/dev/null \
&& mdir=$(mktemp -d /tmp/mountXXXXXX); then
mount "/dev/mapper/$dst" "$mdir" && chmod 1777 "$mdir"
umount "$mdir"
rmdir "$mdir"
fi
fi
fi
done < /etc/crypttab
return $ret
}
# A sed expression to filter out the files that is_ignored_file recognizes
__sed_discard_ignored_files='/\(~\|\.bak\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'