expect怎么加上判断语句

[木泥黑]

代码： 全选

#!/usr/bin/expect -f
spawn sudo chmod -R  u+s /Applications/Utilities/Adobe\ AIR\ Application\ Installer.app
set timeout 20
expect "Password:"
send "54321\r"
expect eof"
#end

如果检测到Password:就会自动输入密码

但是如果屏幕没有Password就会出现错误提示

代码： 全选

send: spawn id exp7 not open
    while executing
"send "54321\r""
    (file "/Users/onlinenmg/Desktop/234.sh" line 7)

怎么加上判断语句,如果没有Password,就不执行后面的步骤

[木泥黑]

代码： 全选

#!/usr/bin/expect -f
spawn sudo chmod -R  u+s /Applications/Utilities/Adobe\ AIR\ Application\ Installer.app
set timeout 20
expect {
"Password:" { send "54321\r"; exp_continue}
}
exit
#end

[poseidon88]

楼主威武

[naturalaw]

[daemon11]

代码： 全选

#!/usr/bin/expect -f
spawn sudo chmod -R  u+s /Applications/Utilities/Adobe\ AIR\ Application\ Installer.app
set timeout 20
expect {
"Password:" { send "54321\r"; exp_continue}
}
exit
#end

楼主能解释一下这个是干什么的吗？