djangix.py

#!/usr/bin/python
import os, pwd, grp, subprocess

#Base directory of your django sites
wwwroot = "/var/www/"

#Create list of directories inside wwwroot
dirs = os.listdir(wwwroot)

#Default django project directory
djangoProject = "/app/"

#Files for django fcgi operations
files = {
        "pid": "site.pid",
        "socket": "site.sock"
}

#are the pid and sockets owned by nginx?
def check_ownership(file):
        return pwd.getpwuid(os.stat(file).st_uid).pw_name

#convert given name to uid
def name_to_uid(name):
        return pwd.getpwnam(name).pw_uid

#convert given group to gid
def name_to_gid(group):
        return grp.getgrnam(group).gr_gid

#change ownership of given file to given user and group
def change_owner(file, user, group):
        os.chown(file, user, group)

#kill given process
def kill_process(process):
        try:
                subprocess.call(["kill", process], stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
        except:
                print "Couldn't find process for %s" % process

#start fcgi process
def startFCGI(pid, socket):
        subprocess.call(["/var/www/control.gigenet.com/bin/python2.6","manage.py", "runfcgi", socket, pid],  shell=False)

#loop through directories collected by os.listdir for wwroot variable
for dir in dirs:
        workdir = wwwroot + dir + djangoProject
        os.chdir(workdir)
        socket = "socket=" + workdir + "%s" % files['socket']
        pid = "pidfile=" + workdir + "%s" % files['pid']
        try:
                f = (workdir + files['pid'])
                process = f.readlines()[0]
                kill_process(process)
                os.remove(files['pid'])
                startFCGI(pid, socket)
                f.close()
        except:
                startFCGI(pid, socket)
        #verbose output when sites start
        print "Starting %s" % dir

        for file, value in files.iteritems():
                owner = check_ownership(workdir + value)
                if owner != "nginx":
                        #find uid of nginx user
                        newOwner = name_to_uid("nginx")
                        #find gid of nginx group
                        newGroup = name_to_gid("nginx")
                        #change owner of file
                        change_owner(value, newOwner, newGroup)
                else:
                        pass