在 kafka 的服务脚本中看到了 daemon
时间：12-14来源：作者：点击数：
/etc/init.d/functions 是 redhat 发行版中包含的，来源
# detect the distribution:
if [ -f /etc/redhat-release -o -f /etc/fedora-release ] ; then
DISTRIBUTION="redhat"
elif [ -f /etc/SuSE-release ] ; then
DISTRIBUTION="suse"
elif [ -f /etc/debian_version ] ; then
DISTRIBUTION="debian"
else
DISTRIBUTION="debian"
fi
# Source function library.
[ "$DISTRIBUTION" = "redhat" ] && . /etc/init.d/functions
[ "$DISTRIBUTION" = "suse" ] && . /etc/rc.status
学习 daemon
functions 文件详细分析和说明，/etc/rc.d/init.d/functions 几乎被 /etc/rc.d/init.d/ 下所有的 Sysv 服务启动脚本加载，也是学习 shell 脚本时一个非常不错的材料，在其中使用了不少技巧。
在该文件中提供了几个有用的函数：
- daemon：启动一个服务程序。启动前还检查进程是否已在运行。
- killproc：杀掉给定的服务进程。
- status：检查给定进程的运行状态。
- success：显示绿色的"OK"，表示成功。
- failure：显示红色的"FAILED"，表示失败。
- passed：显示绿色的"PASSED"，表示pass该任务。
- warning：显示绿色的"warning"，表示警告。
- action：根据进程退出状态码自行判断是执行success还是failure。
- confirm：提示"(Y)es/(N)o/(C)ontinue? [Y]"并判断、传递输入的值。
- is_true："$1"的布尔值代表为真时，返回状态码0，否则返回1。包括t、y、yes和true，不区分大小写。
- is_false："$1"的布尔值代表为假时，返回状态码0。否则返回1。包括f、n、no和false，不区分大小写。
- checkpid：检查/proc下是否有给定pid对应的目录。给定多个pid时，只要存在一个目录都返回状态码0。
- __pids_var_run：检查pid是否存在，并保存到变量pid中，同时返回几种进程状态码。是functions中重要函数之一。
- __pids_pidof：获取进程pid。
- pidfileofproc：获取进程的pid。但只能获取/var/run下的pid文件中的值。
- pidofproc：获取进程的pid。可获取任意给定pidfile或默认/var/run下pidfile中的值。
重头戏 一：daemon 函数
daemon 函数用于启动一个程序，并根据结果输出 success 或 failure，定义语句如下：
# A function to start a program.
daemon() {
# Test syntax.
local gotbase= force= nicelevel corelimit # 定义一大堆变量
local pid base= user= nice= bg= pid_file=
local cgroup=
nicelevel=0
while [ "$1" != "${1##[-+]}" ]; do # 当参数$1以"-"或"+"开头时进入循环，但$1为空时也满足
case $1 in
'') echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1;;
--check) # daemon接受"--arg value"和"--arg=value"两种格式的参数
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 $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1;;
esac
done
# Save basename.
[ -z "$gotbase" ] && base=${1##*/} # 若未传递"--check"，则此处获取bashname
# See if it's already running. Look *only* at the pid file.
__pids_var_run "$base" "$pid_file"
[ -n "$pid" -a -z "$force" ] && return # 如进程已在运行(已检测出pid)，且没有使用force
# 强制启动，则退出daemon函数
# make sure it doesn't core dump anywhere unless requested
corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}" # corelimit、cgroup和资源控制有关，忽略它
# if they set NICELEVEL in /etc/sysconfig/foo, honor it
[ -n "${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 " $base"
# And start it up. # 启动程序。runuser的"-s"指定执行程序的shell，$user指定运行的身份
# "$*"是剔除掉daemon选项后程序的启动指令。
if [ -z "$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"
}
daemon 函数调用方法：
daemon [--check=servicename] [--user=USER] [--pidfile=PIDFILE] [--force] program [prog_args]
需要注意的是：
- 只有 --user 可以用来控制 program 启动的环境。
- --check 和 --pidfile 都是用来检查是否已运行的，不是用来启动的，如果提供了 --check，则检查的是名为 servicename 的进程，否则检查的是 program 名称的进程。
- --force 则表示进程已存在时仍启动。
- prog_args 是向 program 传递它的运行参数，一般会从 /etc/sysconfig/$base 文件中获取。
例如 httpd 的启动脚本中。
echo -n $"Starting $prog: "
daemon --pidfile=${pidfile} $httpd $OPTIONS
这样的语句的执行结果大致如下：
[root@xuexi ~]# service httpd start
Starting httpd: [ OK ]
还需注意，通常 program 的运行参数可能也是 -- 开头的，要和 program 前面的选项区分。例如：
daemon --pidfile $pidfile --check $servicename $processname --pid-file=$pidfile
第二个 --pid-file 是 $processname 的运行参数，第一个 --pidfile 是 daemon 检测 $processname 是否已运行的选项。由于提供了 --check $servicename，所以函数调用语句 __pids_var_run $base [pidfile] 中的 $base 等于 $servicename，即表示检查 $servicename 进程是否允许。如果没有提供该选项，则检查的是 $processname。
至此，daemon 函数已经分析完成。实际上很简单，就是为 daemon 提供几个选项，再提供要执行的命令，并为该命令提供启动参数。
自己的练习
daemon 启动的进程，就是后台进程，而且杀掉后，还会被重启，跟系统服务是一样的。
[root@localhost bingoohuang]# daemon
bash: daemon: command not found...
[root@localhost bingoohuang]# . /etc/rc.d/init.d/functions
[root@localhost bingoohuang]# daemon
[root@localhost bingoohuang]# [ OK ]
[root@localhost bingoohuang]# daemon --aaa
-bash: Usage: daemon [+/-nicelevel] {program} [arg1]...
[root@localhost bingoohuang]# daemon --user=mysql sha1sum /dev/zero &
[1] 9145
[root@localhost bingoohuang]# ps -ef|grep sha1sum
mysql 9135 1 99 19:37 ? 00:00:30 sha1sum /dev/zero
root 9148 9145 0 19:37 pts/1 00:00:00 runuser -s /bin/bash mysql -c ulimit -S -c 0 >/dev/null 2>&1 ; sha1sum /dev/zero
mysql 9149 9148 0 19:37 ? 00:00:00 bash -c ulimit -S -c 0 >/dev/null 2>&1 ; sha1sum /dev/zero
mysql 9150 9149 99 19:37 ? 00:00:11 sha1sum /dev/zero
root 9153 8818 0 19:37 pts/1 00:00:00 grep --color=auto sha1sum
[root@localhost bingoohuang]# exit
logout
➜ centos bssh -H t
Select Server :t
Last login: Tue Jan 14 19:16:45 2020 from 192.168.217.48
[root@localhost ~]# ps -ef|grep sha1sum
mysql 9135 1 99 19:37 ? 00:00:57 sha1sum /dev/zero
root 9148 9145 0 19:37 ? 00:00:00 runuser -s /bin/bash mysql -c ulimit -S -c 0 >/dev/null 2>&1 ; sha1sum /dev/zero
mysql 9149 9148 0 19:37 ? 00:00:00 bash -c ulimit -S -c 0 >/dev/null 2>&1 ; sha1sum /dev/zero
mysql 9150 9149 99 19:37 ? 00:00:38 sha1sum /dev/zero
root 9213 9163 0 19:38 pts/2 00:00:00 grep --color=auto sha1sum
[root@localhost ~]# kill -9 9135
[root@localhost ~]# ps -ef|grep sha1sum
root 9148 9145 0 19:37 ? 00:00:00 runuser -s /bin/bash mysql -c ulimit -S -c 0 >/dev/null 2>&1 ; sha1sum /dev/zero
mysql 9149 9148 0 19:37 ? 00:00:00 bash -c ulimit -S -c 0 >/dev/null 2>&1 ; sha1sum /dev/zero
mysql 9150 9149 99 19:37 ? 00:00:47 sha1sum /dev/zero
root 9215 9163 0 19:38 pts/2 00:00:00 grep --color=auto sha1sum
[root@localhost ~]# ps -ef|grep ^C
[root@localhost ~]# kill -9 9148 9149 9150
[root@localhost ~]#
[root@localhost ~]# ps -ef|grep sha1sum
root 9233 9163 0 19:38 pts/2 00:00:00 grep --color=auto sha1sum
more /etc/rc.d/init.d/functions
# -*-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
if [ $PPID -ne 1 -a -z "$SYSTEMCTL_SKIP_REDIRECT" ] && \
[ -d /run/systemd/system ] ; then
case "$0" in
/etc/init.d/*|/etc/rc.d/init.d/*)
_use_systemctl=1
;;
esac
fi
systemctl_redirect () {
local s
local prog=${1##*/}
local command=$2
local options=""
case "$command" in
start)
s=$"Starting $prog (via systemctl): "
;;
stop)
s=$"Stopping $prog (via systemctl): "
;;
reload|try-reload)
s=$"Reloading $prog configuration (via systemctl): "
;;
restart|try-restart|condrestart)
s=$"Restarting $prog (via systemctl): "
;;
esac
if [ -n "$SYSTEMCTL_IGNORE_DEPENDENCIES" ] ; then
options="--ignore-dependencies"
fi
if ! systemctl show "$prog.service" > /dev/null 2>&1 || \
systemctl show -p LoadState "$prog.service" | grep -q 'not-found' ; then
action $"Reloading systemd: " /bin/systemctl daemon-reload
fi
action "$s" /bin/systemctl $options $command "$prog.service"
}
# Get a sane screen width
[ -z "${COLUMNS:-}" ] && COLUMNS=80
if [ -z "${CONSOLETYPE:-}" ]; then
if [ -c "/dev/stderr" -a -r "/dev/stderr" ]; then
CONSOLETYPE="$(/sbin/consoletype < /dev/stderr 2>/dev/null)"
else
CONSOLETYPE="serial"
fi
fi
if [ -z "${NOLOCALE:-}" ] && [ -z "${LANGSH_SOURCED:-}" ] && \
[ -f /etc/sysconfig/i18n -o -f /etc/locale.conf ] ; then
. /etc/profile.d/lang.sh 2>/dev/null
# avoid propagating LANGSH_SOURCED any further
unset LANGSH_SOURCED
fi
# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
if [ -f /etc/sysconfig/init ]; then
. /etc/sysconfig/init
else
# This all seem confusing? Look in /etc/sysconfig/init,
# or in /usr/share/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
# 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
}
__kill_pids_term_kill_checkpids() {
local base_stime=$1
shift 1
local pid=
local pids=$*
local remaining=
local stat=
local stime=
for pid in $pids ; do
[ ! -e "/proc/$pid" ] && continue
read -r line < "/proc/$pid/stat" 2> /dev/null
stat=($line)
stime=${stat[21]}
[ -n "$stime" ] && [ "$base_stime" -lt "$stime" ] && continue
remaining+="$pid "
done
echo "$remaining"
[ -n "$remaining" ] && return 1
return 0
}
__kill_pids_term_kill() {
local try=0
local delay=3;
local pid=
local stat=($(< /proc/self/stat))
local base_stime=${stat[21]}
if [ "$1" = "-d" ]; then
delay=$2
shift 2
fi
local kill_list=$*
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
[ -z "$kill_list" ] && return 0
kill -TERM $kill_list >/dev/null 2>&1
sleep 0.1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
if [ -n "$kill_list" ] ; then
while [ $try -lt $delay ] ; do
sleep 1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
[ -z "$kill_list" ] && break
let try+=1
done
if [ -n "$kill_list" ] ; then
kill -KILL $kill_list >/dev/null 2>&1
sleep 0.1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
fi
fi
[ -n "$kill_list" ] && return 1
return 0
}
# __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 > /dev/null)
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]/}" ] && [ -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 -m -o $ -o $PPID -o %PPID -x "$1" || \
pidof -c -m -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}" "[arg1]..."
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 $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1
;;
esac
done
# Save basename.
[ -z "$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
__kill_pids_term_kill -d $delay $pid
RC=$?
[ "$RC" -eq 0 ] && success $"$base shutdown" || failure $"$base shutdown"
# 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##*/}
if [ "$_use_systemctl" = "1" ]; then
systemctl status ${0##*/}.service
ret=$?
# LSB daemons that dies abnormally in systemd looks alive in systemd's eyes due to RemainAfterExit=yes
# lets adjust the reality a little bit
if systemctl show -p ActiveState ${0##*/}.service | grep -q '=active
&& \
systemctl show -p SubState ${0##*/}.service | grep -q '=exited
; then
ret=3
fi
return $ret
fi
# 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
}
# Check whether file $1 is a backup or rpm-generated file and should be ignored
is_ignored_file() {
case "$1" in
*~ | *.bak | *.old | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
return 0
;;
esac
return 1
}
# Convert the value ${1} of time unit ${2}-seconds into seconds:
convert2sec() {
local retval=""
case "${2}" in
deci) retval=$(awk "BEGIN {printf \"%.1f\", ${1} / 10}") ;;
centi) retval=$(awk "BEGIN {printf \"%.2f\", ${1} / 100}") ;;
mili) retval=$(awk "BEGIN {printf \"%.3f\", ${1} / 1000}") ;;
micro) retval=$(awk "BEGIN {printf \"%.6f\", ${1} / 1000000}") ;;
nano) retval=$(awk "BEGIN {printf \"%.9f\", ${1} / 1000000000}") ;;
piko) retval=$(awk "BEGIN {printf \"%.12f\", ${1} / 1000000000000}") ;;
esac
echo "${retval}"
}
# Evaluate shvar-style booleans
is_true() {
case "$1" in
[tT] | [yY] | [yY][eE][sS] | [oO][nN] | [tT][rR][uU][eE] | 1)
return 0
;;
esac
return 1
}
# Evaluate shvar-style booleans
is_false() {
case "$1" in
[fF] | [nN] | [nN][oO] | [oO][fF][fF] | [fF][aA][lL][sS][eE] | 0)
return 0
;;
esac
return 1
}
# Apply sysctl settings, including files in /etc/sysctl.d
apply_sysctl() {
if [ -x /lib/systemd/systemd-sysctl ]; then
/lib/systemd/systemd-sysctl
else
for file in /usr/lib/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
[ -f /run/sysctl.d/${file##*/} ] && continue
[ -f /etc/sysctl.d/${file##*/} ] && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
for file in /run/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
[ -f /etc/sysctl.d/${file##*/} ] && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
for file in /etc/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
fi
}
# A sed expression to filter out the files that is_ignored_file recognizes
__sed_discard_ignored_files='/\(~\|\.bak\|\.old\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'
if [ "$_use_systemctl" = "1" ]; then
if [ "x$1" = xstart -o \
"x$1" = xstop -o \
"x$1" = xrestart -o \
"x$1" = xreload -o \
"x$1" = xtry-restart -o \
"x$1" = xforce-reload -o \
"x$1" = xcondrestart ] ; then
systemctl_redirect $0 $1
exit $?
fi
fi
strstr "$(cat /proc/cmdline)" "rc.debug" && set -x
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