5ba*_*be2 3 sockets linux procfs python-3.x python-3.2
/ proc/net/tcp给我一个套接字的本地地址,端口和inode号(例如0.0.0.0:5432和9289).
鉴于上述信息,我想找到特定过程的PID.
可以打开/ proc中的每个编号文件夹,然后使用shell命令检查符号链接以查找套接字/ inode编号,例如"$ sudo ls -l/proc/*/fd/2>/dev/null | grep socket".但是,这似乎比必要的计算成本更高,因为任何给定系统上<5%的进程都有开放的TCP套接字.
查找已打开给定套接字的PID的最有效方法是什么?我更喜欢使用标准库,而我目前正在使用Python 3.2.3进行开发.
编辑:从问题中删除了代码示例,因为它们现在包含在下面的答案中.
以下代码实现了原始目标:
def find_pid(inode):
# get a list of all files and directories in /proc
procFiles = os.listdir("/proc/")
# remove the pid of the current python process
procFiles.remove(str(os.getpid()))
# set up a list object to store valid pids
pids = []
for f in procFiles:
try:
# convert the filename to an integer and back, saving the result to a list
integer = int(f)
pids.append(str(integer))
except ValueError:
# if the filename doesn't convert to an integer, it's not a pid, and we don't care about it
pass
for pid in pids:
# check the fd directory for socket information
fds = os.listdir("/proc/%s/fd/" % pid)
for fd in fds:
# save the pid for sockets matching our inode
if ('socket:[%d]' % inode) == os.readlink("/proc/%s/fd/%s" % (pid, fd)):
return pid
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