mirror of
https://github.com/naruxde/revpipyload.git
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NaruX
0151dbceeb
ACLs über Datei laden (Eine ACL pro Zeile) ProcimgServer Parameter aclmode entfernt Codestyle
133 lines
3.9 KiB
Python
133 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# RevPiPyLoad
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#
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# Webpage: https://revpimodio.org/revpipyplc/
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# (c) Sven Sager, License: LGPLv3
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#
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"""Helperfunktionen fuer das gesamte RevPiPyLoad-System."""
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import os
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import proginit
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from re import match as rematch
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from subprocess import Popen, PIPE
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def _setuprt(pid, evt_exit):
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"""Konfiguriert Programm fuer den RT-Scheduler.
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@param pid PID, der angehoben werden soll
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@return None"""
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if proginit.logger is not None:
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proginit.logger.debug("enter _setuprt()")
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dict_change = {
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"ksoftirqd/0,ksoftirqd/1,ksoftirqd/2,ksoftirqd/3": 10,
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"ktimersoftd/0,ktimersoftd/1,ktimersoftd/2,ktimersoftd/3": 20
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}
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for ps_change in dict_change:
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# pid und prio ermitteln
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kpidps = Popen([
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"/bin/ps", "-o", "pid=,rtprio=", "-C", ps_change
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], bufsize=1, stdout=PIPE)
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# Timeout nachbilden da in Python 3.2 nicht vorhanden
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count = 10
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while kpidps.poll() is None:
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count -= 1
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if count == 0:
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kpidps.kill()
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if proginit.logger is not None:
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proginit.logger.error(
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"ps timeout to get rt prio info - no rt active"
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)
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return None
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evt_exit.wait(0.5)
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if evt_exit.is_set():
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return None
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try:
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kpiddat = kpidps.communicate()[0]
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lst_kpids = kpiddat.split()
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except:
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kpidps.kill()
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if proginit.logger is not None:
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proginit.logger.error(
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"can not get pid and prio - no rt active"
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)
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return None
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while len(lst_kpids) > 0:
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# Elemente paarweise übernehmen
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kpid = lst_kpids.pop(0)
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kprio = lst_kpids.pop(0)
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# Daten prüfen
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if not kpid.isdigit():
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if proginit.logger is not None:
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proginit.logger.error(
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"pid={} and prio={} are not valid - no rt active"
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"".format(kpid, kprio)
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)
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return None
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kpid = int(kpid)
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# RTPrio ermitteln
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if kprio.isdigit():
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kprio = int(kprio)
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else:
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kprio = 0
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if kprio < 10:
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# Profile anpassen
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ec = os.system("/usr/bin/env chrt -fp {} {}".format(
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dict_change[ps_change], kpid
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))
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if ec != 0:
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if proginit.logger is not None:
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proginit.logger.error(
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"could not adjust scheduler - no rt active"
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)
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return None
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# SCHED_RR für pid setzen
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if proginit.logger is not None:
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proginit.logger.info("set scheduler profile of pid {}".format(pid))
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ec = os.system("/usr/bin/env chrt -p 1 {}".format(pid))
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if ec != 0 and proginit.logger is not None:
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proginit.logger.error(
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"could not set scheduler profile of pid {}"
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"".format(pid)
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)
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if proginit.logger is not None:
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proginit.logger.debug("leave _setuprt()")
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def _zeroprocimg():
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"""Setzt Prozessabbild auf NULL."""
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procimg = "/dev/piControl0" if proginit.pargs is None \
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else proginit.pargs.procimg
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if os.access(procimg, os.W_OK):
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with open(procimg, "w+b", 0) as f:
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f.write(bytes(4096))
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else:
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if proginit.logger is not None:
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proginit.logger.error(
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"zeroprocimg can not write to piControl device"
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)
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def refullmatch(regex, string):
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"""re.fullmatch wegen alter python version aus wheezy nachgebaut.
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@param regex RegEx Statement
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@param string Zeichenfolge gegen die getestet wird
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@return True, wenn komplett passt sonst False
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"""
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m = rematch(regex, string)
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return m is not None and m.end() == len(string)
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