Question

我正在尝试执行tshark命令来获取验证的一些输出并使用subprocess.Popen来完成这项工作，但我看到有时subprocess.Popen无法执行命令。以下是我的代码的一个小功能：

File dir = Environment.getExternalStorageDirectory();
            File dcim = new File(dir.getAbsolutePath() + "/DCIM/cut.mp4");
            Uri videoUri = Uri.fromFile(dcim);

例如在上面的代码中，如果我在一个循环中有20个Sessions，那么subprocess.Popen可能无法执行大约12-13次。任何帮助都将非常有用。

下面是我无法执行的stderr。

import subprocess
import logging

def fetch_avps(request_name, logger, tcpdump, port, session_id):
    out_list = []
    if request_name == 'CCR':
        com_sessn_filter = """tshark -r "%s" -odiameter.tcp.ports:"%s" -R 'diameter.cmd.code == 272 and diameter.flags.request==1 and !tcp.analysis.retransmission and diameter.flags.T == 0' -Tpdml -Tfields -ediameter.Session-Id -ediameter.CC-Request-Type -ediameter.User-Name -ediameter.Subscription-Id-Data -ediameter.Value-Digits | grep "%s" | cut -f 1-6 --output-delimiter=':'""" %(tcpdump, port, session_id)
    elif request_name == 'CCA':
        com_sessn_filter = """tshark -r "%s" -odiameter.tcp.ports:"%s" -R 'diameter.cmd.code == 272 and diameter.flags.request==0 and !tcp.analysis.retransmission and diameter.flags.T == 0' -Tpdml -Tfields -ediameter.Session-Id -ediameter.CC-Request-Type -ediameter.Result-Code -ediameter.Validity-Time  -ediameter.Value-Digits -ediameter.Unit-Quota-Threshold | grep "%s" | cut -f 1-6 --output-delimiter=':'""" %(tcpdump, port, session_id)
    p = subprocess.Popen(com_sessn_filter, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
    out = p.stdout.read()
    command_out_list = (out.strip().split("\n"))
    sys.stdout.flush()
    for i in range(len(command_out_list)):
        out_list.append(command_out_list[i].split(":"))
    if out_list[0][0] == '':
        logger.error("Failed to execute Tshark command")
        logger.debug("Failed to execute Tshark command \"%s\" for Session-Id \"%s\"" %(com_sessn_filter, session_id))
    return 0

subprocess.Popen无法在Python中用Linux执行tshark命令

0 个答案: