在 init.d 腳本中傳遞變數

我在下面顯示了 init.d 腳本。

我想用參數啟動守護程序

--http_root /tv

當我在沒有守護程序的情況下啟動應用程序時，參數被接受

但是我似乎無法弄清楚如何調整下面的腳本以使用該參數啟動守護程序。我希望每次都通過參數

sudo service tvheadend start

發出。我不想將參數傳遞給 init.d 腳本。

我怎樣才能做到這一點？

#! /bin/sh
### BEGIN INIT INFO
# Provides:          tvheadend
# Required-Start:    $local_fs $remote_fs udev
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
### END INIT INFO

# Author: Andreas Öman

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/sbin:/usr/bin:/sbin:/bin
DESC="Tvheadend"
NAME=tvheadend
DAEMON=/usr/bin/$NAME
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Configure command line options
[ "$TVH_ENABLED" = "1" ] || exit 0

ARGS="-f"
[ -z "$TVH_USER"      ] || ARGS="$ARGS -u $TVH_USER"
[ -z "$TVH_GROUP"     ] || ARGS="$ARGS -g $TVH_GROUP"
[ -z "$TVH_CONF_DIR"  ] || ARGS="$ARGS -c $TVH_CONF_DIR"
[ -z "$TVH_ADAPTERS"  ] || ARGS="$ARGS -a $TVH_ADAPTERS"
[ "$TVH_IPV6" = "1"   ] && ARGS="$ARGS -6"
[ -z "$TVH_HTTP_PORT" ] || ARGS="$ARGS --http_port $TVH_HTTP_PORT"
[ -z "$TVH_HTTP_ROOT" ] || ARGS="$ARGS --http_root $TVH_HTTP_ROOT"
[ -z "$TVH_HTSP_PORT" ] || ARGS="$ARGS --htsp_port $TVH_HTSP_PORT"
[ -z "$TVH_ARGS"      ] || ARGS="$ARGS $TVH_ARGS"
[ "$TVH_DEBUG" = "1"  ] && ARGS="$ARGS -s"

# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
   # Return
   #   0 if daemon has been started
   #   1 if daemon was already running
   #   2 if daemon could not be started
       udevadm settle
   start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
       || return 1
   start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
       $ARGS \
       || return 2
}

#
# Function that stops the daemon/service
#
do_stop()
{
   # Return
   #   0 if daemon has been stopped
   #   1 if daemon was already stopped
   #   2 if daemon could not be stopped
   #   other if a failure occurred
   start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
   RETVAL="$?"
   [ "$RETVAL" = 2 ] && return 2
   # Many daemons don't delete their pidfiles when they exit.
   rm -f $PIDFILE
   return "$RETVAL"
}


case "$1" in
 start)
   [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
   do_start
   case "$?" in
       0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
       2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
   esac
   ;;
 stop)
   [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
   do_stop
   case "$?" in
       0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
       2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
   esac
   ;;
 restart|force-reload)
   #
   # If the "reload" option is implemented then remove the
   # 'force-reload' alias
   #
   log_daemon_msg "Restarting $DESC" "$NAME"
   do_stop
   case "$?" in
     0|1)
       do_start
       case "$?" in
           0) log_end_msg 0 ;;
           1) log_end_msg 1 ;; # Old process is still running
           *) log_end_msg 1 ;; # Failed to start
       esac
       ;;
     *)
       # Failed to stop
       log_end_msg 1
       ;;
   esac
   ;;
 *)
   echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
   exit 3
   ;;
esac

:

如果您不想修改init.d腳本，請更改（或創建）

/etc/default/tvheadend

正如 steeldriver 在他的評論中指出的那樣，編輯（添加、擴展）條目：

TVH_HTTP_ROOT=/tv

此文件在 init.d 腳本中獲取，其中包含以下行：

[ -r /etc/default/$NAME ] && . /etc/default/$NAME

進而

[ -z "$TVH_HTTP_ROOT" ] || ARGS="$ARGS --http_root $TVH_HTTP_ROOT"

將參數設置為守護程序呼叫。

否則，您也可以只更改線路。

ARGS="-f"

在腳本中

ARGS="-f --http_root /tv"

但這會在包更新時被覆蓋。

引用自：https://unix.stackexchange.com/questions/177690