source: pvrrd/htmlCreate.py @ 206

#!/usr/bin/env /APSshare/bin/python
####
# needs BCDA's /APSshare/bin/python to find ElementTree on ipnspool3
# ipnspool3 has an old Python (2.4) installed with no xml.etree.ElementTree

'''
 run CGI scripts for each PV (& RRD database)

 @note only needed to generate plots from RRD databases from command-line.
 Normally, plots are generated from WWW server operating a CGI page.
'''
########### SVN repository information ###################
# $Date: 2010-08-18 20:28:25 +0000 (Wed, 18 Aug 2010) $
# $Author: jemian $
# $Revision: 206 $
# $HeadURL$
# $Id: htmlCreate.py 206 2010-08-18 20:28:25Z jemian $
########### SVN repository information ###################

###############################################################################

import dircache
import os.path
import shlex
import subprocess
import sys
import time
import xmlSupport

###############################################################################

def processOne(pwd, rootName, properties):
    cgi = os.path.join( pwd, 'cgi', rootName + '.cgi' )
    rrd = os.path.join( pwd, 'data', rootName + '.rrd' )
    html = os.path.join( pwd, 'html', rootName + '.html' )

    # Do not update if there is no matching RRD file
    # This will ignore .svn directories and other directory
    #    items that are not in compliance with the design
    if (os.path.exists(rrd)):
        rrdModTime = os.path.getmtime(rrd)

        # Only update those html files with new RRD data.
        # This will ignore dormant CGI scripts
        htmlModTime = 0
        if (os.path.exists(html)):
            htmlModTime = os.path.getmtime(html)
        if (rrdModTime >= htmlModTime):
            cmd = properties['rrd']['rrdcgi'] + ' --filter ' + cgi + ' >' + html
            cmd = properties['rrd']['rrdcgi'] + ' --filter ' + cgi
            shellCommandToFile(cmd, html)
            print time.ctime(), cmd


def shellCommandToFile(command, outFile):
    '''execute a shell command and write its output to a file'''
    lex = shlex.split(command)
    print command, "\n", lex
    p = subprocess.Popen(lex, stdout=subprocess.PIPE)
    f = p.stdout
    p.wait()
    buf = f.read()
    f.close()
    writeFile(outFile, buf)


def writeFile(file, contents):
    '''write contents to file'''
    f = open(file, 'w')
    f.write(contents)
    f.close()


###############################################################################

cfg = xmlSupport.readConfigurationXML('/home/joule/WEB33/www/rrd')
baseDir = cfg['properties']['rrd_logs_base_dir']

for fileName in dircache.listdir(os.path.join(baseDir,'cgi')):
    processOne(baseDir, fileName, cfg['properties'])