Rumor has it that Gerard Beekmans may have mentioned these words:
Attached server.c and client.c.
Time for me to ping in here:
I'm awfully bad at C - been learning it for 20 years, and never quite seem
to get the hang of it, mainly because I become disgusted at it, then write
what I need Python in 1/5 the time... and no segfaults! I was weaned on
Basic & Assembly, so maybe that's just a product of my upbringing. [[ That,
and my first computer with a C compiler on it took almost 10 minutes to
compile "Hello World" until I could afford a RAMdisk. Ever *swap floppies*
just to compile a 4-line program? It ain't fun. ]]
I used to be OK in Perl, but never did sockets [[ or anything decently
"high-level" with it ]] and I've not used it since I learned Python, so I'm
pretty rusty with it as well, but I could prolly relearn it.
I needed to write a client-server program recently (to xfer some MRTG info
from a server that wasn't running any webservices whatsoever to the
webserver), and so I chose Python -- this is what I came up with. It took
me a couple of hours to make it work, having never programmed anything
sockets-based before, I don't think that's *too* bad... [[ Ow! I just hurt
my arm!!! ;-) ]] Googling helped a lot, tho. ;-)
Anyway, the first program is the server - it sits & waits on port 9191, and
when it receives information in the form of:
"string" --> filename to write
number
number
number
number --> 4 lines of numeric info for MRTG
it writes that info in the specified filename.
Here's the server:
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[EMAIL PROTECTED] bin]# more qmail_mrtg_daemon.py
#!/usr/bin/python
def daemonize():
"""Become a Linux/UNIX daemon"""
import os,sys
os.chdir('/')
if os.fork(): os._exit(0)
os.setsid()
sys.stdin = sys.__stdin__ = open('/dev/null','r')
sys.stdout = sys.__stdout__ = open('/dev/null','w')
sys.stdout = sys.__stderr__ = os.dup(sys.stdout.fileno())
def daemonize_log_demo():
"""Demonstrate deamonize() with trivial syslog output"""
import time,syslog,os
log = syslog.openlog("ZDaemon[%d]" % os.getpid())
t=0
while 1:
t+=1
syslog.syslog(syslog.LOG_INFO,"Interval %d reached" % (t) )
time.sleep(5)
if __name__=='__main__':
daemonize()
# daemonize_log_demo()
qq = []
import socket
# print "#create an INET, STREAMing socket"
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# print "#bind the socket to a public host, and a well-known port"
s.bind((socket.gethostname(), 9191))
# print "#become a server socket"
while 1:
s.listen(1)
conn, addr = s.accept()
# print "Now we start accepting info..."
# print "=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
while 1:
zz = conn.recv(1024)
if not zz: break
# if not (addr[0] == '12.15.88.1' or addr[0] == '12.15.88.237'): break
if not (addr[0] == '12.15.88.1' or addr[0] == '12.2.85.9' or addr[0]
== '12.15.88.237'): brea
k
# print "%s - %s: %s" % (conn,addr,zz)
qq = zz.split('\n')
# print len(qq)
outfile = open('/etc/mrtg/%s' % qq[0],'w')
for i in range(1,len(qq)):
outfile.write(qq[i])
outfile.write('\n')
outfile.close()
conn.close()
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Here's the client that sends the system info over to the server:
[EMAIL PROTECTED] root]# more /usr/local/bin/send_mrtg.py
#!/usr/bin/python
import socket, os, sys
from time import sleep
# Go get the uptime from the mailserver...
uptime_s = os.popen("uptime").readlines()[0]
uptime = uptime_s.split(' ')[-3:]
uptime_5 = int(float(uptime[0].replace(',',''))*100)
uptime_15 = int(float(uptime[2].replace('\n',''))*100)
# Go get the info to send to the mailserver...
ext_s = os.popen("grep 'www.spamhaus.org' < /var/log/qmail/smtpd/current|wc
-l").readlines()
ext_sbl = int(ext_s[0])
ext_o = os.popen("grep 'ORDB' < /var/log/qmail/smtpd/current|wc
-l").readlines()
ext_openrelay = int(ext_o[0])
allday_spamhaus_b = os.popen("grep 'www.spamhaus.org'
/var/log/qmail/smtpd/current /var/log/qmail/sm
tpd/[EMAIL PROTECTED] |wc -l").readlines()
int_allday_spamhaus = int(allday_spamhaus_b[0])
allday_ordb_b = os.popen("grep 'ORDB' /var/log/qmail/smtpd/current
/var/log/qmail/smtpd/[EMAIL PROTECTED] |wc -l
").readlines()
int_allday_ordb = int(allday_ordb_b[0])
ext_a = os.popen("grep 'abuseat' < /var/log/qmail/smtpd/current|wc
-l").readlines()
ext_abuseat = int(ext_a[0])
int_t = os.popen("grep 'bad SMTP server bounces' <
/var/log/qmail/smtpd/current|wc -l").readlines()
int_tcpsmtp = int(int_t[0])
int_b = os.popen("grep 'badhelo' < /var/log/qmail/smtpd/current|wc
-l").readlines()
int_badhelo = int(int_b[0])
allday_badhelo_b = os.popen("grep 'badhelo' /var/log/qmail/smtpd/current
/var/log/qmail/smtpd/[EMAIL PROTECTED]
|wc -l").readlines()
int_allday_badhelo = int(allday_badhelo_b[0])
allday_badsmtp_b = os.popen("grep 'bad SMTP server bounces'
/var/log/qmail/smtpd/current /var/log/qm
ail/smtpd/[EMAIL PROTECTED] |wc -l").readlines()
int_allday_badsmtp = int(allday_badsmtp_b[0])
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(('12.15.88.2',9191))
s.send('external_spam.txt\n%i\n%i\n\n' % (ext_sbl,ext_openrelay))
s.close()
sleep(0.2)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(('12.15.88.2',9191))
s.send('internal_spam.txt\n%i\n%i\n\n' % (int_tcpsmtp,int_badhelo))
s.close()
sleep(0.2)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(('12.15.88.2',9191))
s.send('abuseat_spam.txt\n%i\n%i\n\n' % (ext_abuseat,0))
s.close()
sleep(0.2)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(('12.15.88.2',9191))
s.send('mail_uptime.txt\n%i\n%i\n\n' % (uptime_5,uptime_15))
s.close()
sleep(0.2)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(('12.15.88.2',9191))
s.send('allday_internalspam.txt\n%i\n%i\n\n' %
(int_allday_badhelo,int_allday_badsmtp))
s.close()
sleep(0.2)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(('12.15.88.2',9191))
s.send('allday_externalspam.txt\n%i\n%i\n\n' %
(int_allday_spamhaus,int_allday_ordb))
s.close()
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Not really intended to say much - just thought I'd "share with the group." ;-)
I apologize for the line-wrapping; never really thought I'd be emailing
these things... ;-)
HTH,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger | "Profile, don't speculate."
SysAdmin, Iceberg Computers | Daniel J. Bernstein
[EMAIL PROTECTED] |
--
http://linuxfromscratch.org/mailman/listinfo/alfs-discuss
FAQ: http://www.linuxfromscratch.org/faq/
Unsubscribe: See the above information page
