#!/usr/bin/python

python监控linux进程数量

工作原理：基于/proc 文件系统

coding:utf-8

import os

def get_all_pid():

return [d for d in os.listdir("/proc") if d.isdigit()]

def get_cmdline(pid=[]):

ret = []for pid_dir in pid:with open("/proc/{}/cmdline".format(pid_dir)) as f:cmdline = f.readline()if cmdline:ret.append(cmdline)return ret

def get_process_num(process_name):

pids = get_all_pid()cmdlines = get_cmdline(pids)num = 0for line in cmdlines:if process_name in line:num += 1return num

if name == "main":

print get_process_num("php-fpm")