Python os.forkpty 为什么我不能让它工作

发布于 2024-07-20 08:13:18 字数 332 浏览 10 评论 0原文

import pty
import os
import sys
import time

pid, fd = os.forkpty()

if pid == 0:
    # Slave
    os.execlp("su","su","MYUSERNAME","-c","id")

# Master
print os.read(fd, 1000)
os.write(fd,"MYPASSWORD\n")
time.sleep(1)
print os.read(fd, 1000)
os.waitpid(pid,0)
print "Why have I not seen any output from id?"

原文

import pty
import os
import sys
import time

pid, fd = os.forkpty()

if pid == 0:
    # Slave
    os.execlp("su","su","MYUSERNAME","-c","id")

# Master
print os.read(fd, 1000)
os.write(fd,"MYPASSWORD\n")
time.sleep(1)
print os.read(fd, 1000)
os.waitpid(pid,0)
print "Why have I not seen any output from id?"

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沉溺在你眼里的海 2024-07-27 08:13:18

你睡得太久了。最好的办法是尽快开始读取，一次读取一个字节。

#!/usr/bin/env python

import os
import sys

pid, fd = os.forkpty()

if pid == 0:
    # child
    os.execlp("ssh","ssh","hostname","uname")
else:
    # parent
    print os.read(fd, 1000)
    os.write(fd,"password\n")

    c = os.read(fd, 1)
    while c:
        c = os.read(fd, 1)
        sys.stdout.write(c)

You are sleeping for too long. Your best bet is to start reading as soon as you can one byte at a time.

#!/usr/bin/env python

import os
import sys

pid, fd = os.forkpty()

if pid == 0:
    # child
    os.execlp("ssh","ssh","hostname","uname")
else:
    # parent
    print os.read(fd, 1000)
    os.write(fd,"password\n")

    c = os.read(fd, 1)
    while c:
        c = os.read(fd, 1)
        sys.stdout.write(c)

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