Thanks for the reply, but I know there is something wrong with the command, I'm just not sure how to troubleshoot it. Anyway, I can execute all of the commands from the command line, but only 3 fails when run from within the script. I'll take a look at the link.
Nick Vatamaniuc wrote: > If the other commands work but 3) doesn't, it means there is something > different (wrong?) with the command. > > So try running 3) , then one of the other ones and see the difference. > > > The getCommandOutput() , I suspect, just waits for the data from the > actual command and the command is not returning anything. It could be > because it just takes way too long (I am not familiar with Gentoo, so > not sure if emerge world takes 1 second or 24 hours...) or perhaps the > "emerge -uvp world" stops at some point and is waiting for input (a > command prompt like "are you sure you want to do this [Y/n]?" > > For more in depth on subprocesses in Python take a look at the > subprocess module: > http://docs.python.org/lib/module-subprocess.html > > Hope this helps, > Nick V. > > > > Lorenzo wrote: >> I have this script that I want to use weekly to send me email with >> information regarding disk space and available upgrades for my system. >> This script is actually a learning tool for me as I learn Python. The >> problem I've run into has me stumped and I need some help. What happens >> is when the script runs it does these things, parses the result and >> appends that to an html string: >> >> 1) checks disk space by using df -t reiserfs >> 2) runs time emerge --sync >> 3) runs emerge -uvp world >> 4) runs emerge -uv --fetchonly world >> >> The 'emerge' command is a Gentoo specific one. If I remove step 3), >> everything else runs just fine, the email is sent and I receive what I >> expect. But when step 3) is allowed to run, even if its the only command >> that runs, it hangs somewhere in the function getCommandOutput. If I try >> and debug the command, it appears to hang on this line: >> err = child.wait() >> >> I suspect a race condition, but I'm not sure how to proceed, can someone >> lend me a hand. Here is the script I wrote, I got the command >> getCommandOutput from this site: >> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52296 >> TIA >> >> [code] >> #!/usr/bin/python >> >> ################################ >> ### NEED TO RUN THIS AS ROOT ### >> ### EMERGE SYNC REQUIRES THIS ### >> ################################ >> import os, re, smtplib, MimeWriter, mimetools, cStringIO, popen2, fcntl, >> select, pdb >> >> cmd = 'df -t reiserfs' >> finalList = [] >> theOutput = [] >> >> text = "This realy should be in HTML" >> >> >> html = "<html>\ >> <head>\ >> <meta http-equiv=\"Content-Type\" content=\"text/html; >> charset=iso-8859-1\">\ >> </head>\ >> <BODY><BR><font color='green'><em>Disk Utilization on >> Hedley:</em></font><BR>" >> >> out = cStringIO.StringIO() >> writer = MimeWriter.MimeWriter(out) >> txtin = cStringIO.StringIO(text) >> >> >> def createhtmlmail (html, text, subject): >> """Create a mime-message that will render HTML in popular >> MUAs, text in better ones""" >> import MimeWriter >> import mimetools >> import cStringIO >> >> out = cStringIO.StringIO() # output buffer for our message >> htmlin = cStringIO.StringIO(html) >> txtin = cStringIO.StringIO(text) >> >> writer = MimeWriter.MimeWriter(out) >> # >> # set up some basic headers... we put subject here >> # because smtplib.sendmail expects it to be in the >> # message body >> # >> writer.addheader("Subject", subject) >> writer.addheader("MIME-Version", "1.0") >> >> writer.addheader("From", "[EMAIL PROTECTED]") >> writer.addheader("To", "[EMAIL PROTECTED]") >> # >> # start the multipart section of the message >> # multipart/alternative seems to work better >> # on some MUAs than multipart/mixed >> # >> writer.startmultipartbody("alternative") >> writer.flushheaders() >> # >> # the plain text section >> # >> subpart = writer.nextpart() >> subpart.addheader("Content-Transfer-Encoding", "quoted-printable") >> pout = subpart.startbody("text/plain", [("charset", 'us-ascii')]) >> mimetools.encode(txtin, pout, 'quoted-printable') >> txtin.close() >> # >> # start the html subpart of the message >> # >> subpart = writer.nextpart() >> subpart.addheader("Content-Transfer-Encoding", "quoted-printable") >> # >> # returns us a file-ish object we can write to >> # >> pout = subpart.startbody("text/html", [("charset", 'us-ascii')]) >> mimetools.encode(htmlin, pout, 'quoted-printable') >> htmlin.close() >> # >> # Now that we're done, close our writer and >> # return the message body >> # >> writer.lastpart() >> msg = out.getvalue() >> out.close() >> print msg >> return msg >> >> def makeNonBlocking(fd): >> fl = fcntl.fcntl(fd, fcntl.F_GETFL) >> try: >> fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NDELAY) >> except AttributeError: >> fcntl.fcntl(fd, fcntl.F_SETFL, fl | fcntl.FNDELAY) >> >> >> def getCommandOutput(command): >> theOutput = [] >> child = popen2.Popen3(command, 1) # capture stdout and stderr from >> command >> child.tochild.close() # don't need to talk to child >> outfile = child.fromchild >> outfd = outfile.fileno() >> errfile = child.childerr >> errfd = errfile.fileno() >> makeNonBlocking(outfd) # don't deadlock! >> makeNonBlocking(errfd) >> outdata = errdata = '' >> outeof = erreof = 0 >> while 1: >> ready = select.select([outfd,errfd],[],[]) # wait for input >> if outfd in ready[0]: >> outchunk = outfile.read() >> if outchunk == '': outeof = 1 >> outdata = outdata + outchunk >> if errfd in ready[0]: >> errchunk = errfile.read() >> if errchunk == '': erreof = 1 >> errdata = errdata + errchunk >> if outeof and erreof: break >> select.select([],[],[],.1) # give a little time for buffers to fill >> err = child.wait() >> if err != 0: >> raise RuntimeError, '%s failed w/ exit code %d\n%s' % (command, err, >> errdata) >> theOutput.append(outdata) >> theOutput.append(errdata) >> return theOutput >> >> >> #Run df and get the disk info >> output = os.popen(cmd) >> >> # match two or more spaces, the header line has a sngle >> # space between the 'Mouted on' field >> # We need to keep those together >> # The other spaces are the separation in the field headers >> # To get the output from df down to just the field headers >> # and the data, we need to match 2 or more spaces >> # -1 eliminates the \n at the end of output. >> # We'll get it back when we write each line to the >> # mail message, I suspect >> >> html += "<font color='blue'>" >> >> for lines in output.readlines(): >> >> p = re.compile('\ +') >> formattedText = p.subn(' ', lines[:-1], 5) >> html += formattedText[0] + '<BR>' >> >> html += "</font>" >> >> mydata = getCommandOutput("time emerge --sync") >> >> >> p = re.compile('\ +') >> p.subn(' ', mydata[1])[0] >> p = re.compile('\n') >> string = (p.subn('<BR>', mydata[1]))[0] >> >> html += "<BR><BR><em><font color='green'>Sync Time: " + "<BR>" + >> "</font></em>" + "<font color='blue'>" + string + "</font>" >> >> >> mydata = "" >> mydata = getCommandOutput("emerge -uvp world") >> >> p = re.compile('\ +') >> (p.subn(' ', mydata[0]))[0] >> p = re.compile('\n') >> html += "<font color='blue'>" + (p.subn('<BR>', mydata[0]))[0] + >> "</font>" >> >> >> >> try: >> getCommandOutput('emerge -uv --fetchonly world') >> html += "<font color='Green'><em><BR>Fetch completed >> successfuly!</em></font>" >> except RuntimeError: >> html += "< font color='Red'><BR>******Fetch did not complete >> successfully!*********</font>" >> >> html+= '</BODY> </HTML>' >> >> out = cStringIO.StringIO() >> writer = MimeWriter.MimeWriter(out) >> txtin = cStringIO.StringIO("This should be in HTML") >> subject = "Emerge info and disk utilization on Hedley" >> message = createhtmlmail(html, text, subject) >> server = smtplib.SMTP("hedley") >> server.sendmail('[EMAIL PROTECTED]', '[EMAIL PROTECTED]', message) >> server.quit() >> [/code] >> >> -- >> "My Break-Dancing days are over, but there's always the Funky Chicken" >> --The Full Monty > -- http://mail.python.org/mailman/listinfo/python-list
