ก๊วนซอฟท์แวร์ </softganz> SoftGang (Gang Software)

ผมทดลองเปิดสถานีวิทยุออนไลน์ ซึ่งมีหลายสถานี (port) และต้องการให้มันเปิดแบบอัตโนมัติในตอนเปิด server ก็ไปเจอวิธีการและ code ในเว็บนี้

ลองทำตามโค๊ดข้างล่าง

#!/bin/bash
#
# chkconfig: 345  91 35
# description: Starts and stops sc_serv.<br />
#          You know, the mp3 streaming thang.
#
#   Version 1.3 (nov 4 2001)
#   Now with more revisions! System now checks for pid file before cat
#   to display so that we receive no error messages. System also displays
#   pids as we are killing old processes. Profanity was removed from the<br />
#   startup messages. Tests for a pid file before reporting success. Displays
#   the relay server name when we start the daemon up, so that we know
#   which servers are getting booted. Pushed the success marker over to the<br />
#   right and added [] because I am just a slave to fashion.
#
#   Version 1.2 (nov 3 2001)
#   Same exact shit, but runs as nobody for security reasons. Just
#   in case we are worried about buffer overflows or whatnot.
#   
#   Version 1.1 (nov 3 2001)
#   Starts stops and restarts jobs. Also checks for existing daemons
#   before calling a start, and exits without starting new ones. This
#   prevents you from being a dumbass and starting multiple listeners
#   on the same port. I would suggest using the restart command
#   in these cases. Also creates a shoutcast.pid file that can be used
#   to discover all of the (many) pids used by shoutcast when running.
#
#   Version 1.0 (nov 3 2001)<br />
#   Starts and stops successfully.<br />
#   Kills old jobs on start command. Dirty, but<br />
#   does the job well enough. Tested functional on
#   mandrake version 8.1 but should work on redhat<br />
#   or any other distro that supports a standard<br />
#   sysv startup script.
#
#   Instructions for use.
#   1: untargzip shoutcast into the directory of your choosing
#   2: copy sc_serv into the /usr/sbin directory<br />
#   3: Create the directory /etc/shoutcast
#   4: copy the shoutcast.conf file into your /etc/shoutcast dir.
#   5: Edit the shoutcast.conf file to match your needs.
#   6: Make as many more conf files as needed to support<br />
#      multiple streams. Be sure to edit these files so that
#      you are not starting multiple shoutcast servers that
#      are either listening or broadcasting on the same port.
#   7: Copy this file into the /etc/rc.d/init.d directory
#   8: chmod this file +x (chmod ug+x /etc/rc.d/init.d/shoutcast)
#   9: run chkconfig --add shoutcast from the /etc/rc.d/init.d dir.
#   10:Run /etc/rc.d/init.d/shoutcast start<br />
#   11:Drink a beer, or light one up, and enjoy the tunes.
#

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up. This line may cause an error on incompatible
# distributions. Remove it if necessary. Also remove if the startup always
# fails for no apparent reason.
[[ ${NETWORKING} = "no" ]] && exit 0<br />
<br />
<br />
stop (){
 <a class="hashtag" href="/tags/First">#First</a> we want to kill the original servers, so we don't get errors.
  echo "Killing old shoutcast servers."
  for oldpid in `ps -A | grep sc_serv | cut -c 0-6`; do
      kill -9 $oldpid
      if [[ $1 == "-v" ]]
      then
          echo $oldpid
      fi
  done
  rm -f /var/run/shoutcast.pid
}<br />
<br />
<br />
start (){
  <a class="hashtag" href="/tags/Now">#Now</a> we can start the servers up.
  if [[ $1 == "-v" ]]<br />
      then
          echo "Starting up the new shoutcast servers. Starting..."
      fi
    <br />
  servcount=`expr 0`
  for cfile in `ls /etc/shoutcast`; do
      echo -n $cfile
      echo -n " -> "
      grep ^RelayServer /etc/shoutcast/$cfile
      # This is the line where we actually run the shoutcast program!
      <a class="hashtag" href="/tags/sudo">#sudo</a> -u nobody /usr/bin/sc_serv /etc/shoutcast/$cfile > /dev/null &
      /usr/bin/sc_serv /etc/shoutcast/$cfile > /dev/null &
      let servcount=servcount+1
  done
  <a class="hashtag" href="/tags/Create">#Create</a> the pid file...
  ps -A | grep sc_serv | cut -c 0-6 > /var/run/shoutcast.pid
  <a class="hashtag" href="/tags/Done">#Done</a> now!
  echo "Started $servcount servers."
}<br />
<br />
<br />
case "$1" in
  start)    
  if [[ ! -e /var/run/shoutcast.pid ]]
  then
    start $2
    
    if [[ -e /var/run/shoutcast.pid ]]<br />
    then        
        echo "Startup                      [SUCCESS]"
    fi
    
  else
      if [[ $2 == "-v" ]]
      then
        echo "Shoutcast is already running these processes:"
        #Toldja! Checks before displaying pid file.
        if [[ -e /var/run/shoutcast.pid ]]
        then
            cat /var/run/shoutcast.pid
        fi
        echo "Try calling shoutcast restart in order to kill old processes."
    else
        echo "SC_SERV is already running. Try calling shoutcast restart."
    fi
    echo "Startup                      [FAILED]"
  fi
    ;;
  restart)
    stop $2
    if [[ $2 == "-v" ]]
        then
            echo "Waiting for the old servers to die..."
        fi

    sleep 4
    start $2
    if [[ -e /var/run/shoutcast.pid ]]<br />
    then        
        echo "Startup                      [SUCCESS]"
    fi
    ;;
  stop)
  if [[ -e /var/run/shoutcast.pid ]];
  then
    stop $2
    echo "Shoutcast shutdown                   [SUCCESS]"
  else
    echo "There are no registered shoutcast servers running right now. Attempting to kill anyways."
    stop $2
  fi
    ;;
  *)
    echo "Usage: shoutcast (start|stop|restart) [-v]"
    
esac

ขั้นตอนการติดตั้ง

1. สร้างไฟล์ /etc/init.d/shoutcast แล้วเปลี่ยน attr เป็น 755
2. copy ไฟล์ sc_serv (ที่ดาวน์โหลดมา) ไปไว้ที่ /usr/bin
3. สร้างโฟล์เดอร์ /etc/shoutcast แล้วนำไฟล์คอนฟิกมาใส่ไว้ในนี้ จะกี่ไฟล์ก็ได้ ตอนเปิดเครื่องมันจะ start ให้หมด