python監控linux進程數量
工作原理：基於/proc 文件系統
#!/usr/bin/python
# 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 = 0
for line in cmdlines:
if process_name in line:
num += 1
return num
if __name__ == "__main__":
print get_process_num("php-fpm")