expect wait

lll0024

expect 学习
example
spawn telenet IP
expect "login:*"
send "user\r"
expect "password:*"
send "123456\r"
sleep 5

send "service XXXXX start"  # =>假如这个命令执行时间长，命令结果不知道。不用expect , sleep,能不能用wait等待服务启动完成，再查状态。

wait                                       #<= wait 行吗

send "service XXXXX status" #查服务启动状态

expect eof

rdcwayx

expect 自带wait

1. wait [args]
   
2. delays until a spawned process (or the current process if none is named) terminates.
   
3. 
   
4. wait
   
5. normally returns a list of four integers. The first integer is the pid of the process that was waited upon. The second integer is the corresponding spawn id. The third integer is -1 if an operating system error occurred, or 0 otherwise. If the third integer was 0, the fourth integer is the status returned by the spawned process. If the third integer was -1, the fourth integer is the value of errno set by the operating system. The global variable errorCode is also set.
   
6. Additional elements may appear at the end of the return value from wait. An optional fifth element identifies a class of information. Currently, the only possible value for this element is CHILDKILLED in which case the next two values are the C-style signal name and a short textual description.

复制代码

waker

expect 提示符
send "wait\r"
expect 提示符

lll0024

waker 发表于 2013-08-27 13:57
expect 提示符
send "wait\r"
expect 提示符

1.
expect 提示符
send "wait\r"

2.
expect 提示符
wait

1.2两个方法有区别吗？

waker

假设你的本机为A
telnet的目标机器为B
那么1中的wait在B上执行
2中的wait在A上执行

hanfeng122525

第一种无法满足需要把
回复 4# lll0024


   

hanfeng122525

用 sleep 需要估计等待的时间，这个有时候估计时间不是那么准确；

用wait，不用估计时间，但是执行完了之后，怎么继续后面的任务；就是结束 wait，而又要保证wait前的任务已经完成。？？回复 5# waker