Daemon
初始化腳本不創建 PID 文件
我需要為 IRC 記錄器創建一個初始化腳本。我複制了/etc/init.d/skeleton。我填寫了配置部分以滿足我的需要，並且我還必須將 –background 添加到啟動守護程序命令，因為我的 IRC 記錄器沒有分離。當我使用我的 init 腳本時，記錄器可以正常啟動，但它並沒有像它應該的那樣創建 .pid 文件。因此，除非我自己找出程序 ID 並將其殺死，否則程序無法停止。這是腳本：
#! /bin/sh ### BEGIN INIT INFO # Provides: skeleton # Required-Start: $remote_fsh # Required-Stop: $remote_fs # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Example initscript # Description: This file should be used to construct scripts to be # placed in /etc/init.d. ### END INIT INFO # Author: Cory Walker <cwalker32@gmail.com> # # Please remove the "Author" lines above and replace them # with your own name if you copy and modify this script. # Do NOT "set -e" # PATH should only include /usr/* if it runs after the mountnfs.sh script PATH=/sbin:/usr/sbin:/bin:/usr/bin DESC="Logs specified IRC channels." NAME=irclogger DAEMON=/usr/sbin/$NAME #DAEMON_ARGS="irc.freenode.net linux4nano linux4nano-dev freemyipod freemyipod-dev" DAEMON_ARGS="irc.freenode.net blablabla" 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 # Load the VERBOSE setting and other rcS variables . /lib/init/vars.sh # 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 start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \ || return 1 start-stop-daemon --start --background --pidfile $PIDFILE --exec $DAEMON -- \ $DAEMON_ARGS \ || return 2 # Add code here, if necessary, that waits for the process to be ready # to handle requests from services started subsequently which depend # on this one. As a last resort, sleep for some time. } # # 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 # Wait for children to finish too if this is a daemon that forks # and if the daemon is only ever run from this initscript. # If the above conditions are not satisfied then add some other code # that waits for the process to drop all resources that could be # needed by services started subsequently. A last resort is to # sleep for some time. start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON [ "$?" = 2 ] && return 2 # Many daemons don't delete their pidfiles when they exit. rm -f $PIDFILE return "$RETVAL" } # # Function that sends a SIGHUP to the daemon/service # do_reload() { # # If the daemon can reload its configuration without # restarting (for example, when it is sent a SIGHUP), # then implement that here. # start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME return 0 } 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 ;; #reload|force-reload) # # If do_reload() is not implemented then leave this commented out # and leave 'force-reload' as an alias for 'restart'. # #log_daemon_msg "Reloading $DESC" "$NAME" #do_reload #log_end_msg $? #;; 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|reload|force-reload}" >&2 echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2 exit 3 ;; esac :
將
--make-pidfile選項添加到您的 start-stop-daemon 呼叫中。--pidfile僅告訴 start-stop-daemon 在哪裡查找 pidfile，而不--make-pidfile假定此 pidfile 是由要啟動的程序創建的，而不是由 start-stop-daemon 創建的。請務必閱讀start-stop-daemon(8) 的手冊頁以獲取更多詳細資訊。