scp完成后出现的附加提示
scp完成后出现的附加提示
提问于 2018-01-18 19:31:50
当scp在此代码中完成后，将出现额外的提示符。我试过几种方法来防止这种情况的发生，但它还是出现了。为了清楚起见，在for循环之后出现两个提示，然后程序继续。
#!/usr/bin/expect
# Set timeout
set timeout 1
# Set the user and pass
set user "user"
set pass "pass"
# Get the lists of hosts, one per line
set f [open "hosts.txt"]
set hosts [split [read $f] "\n"]
close $f
# Get the commands to run, one per line
set f [open "commands.txt"]
set commands [split [read $f] "\n"]
close $f
# Clear console
set clear "clear"
# Iterate over the hosts
foreach host $hosts {
# Establish ssh conn
spawn ssh $user@$host
expect "password:"
send "$pass\r"
# Iterate over the commands
foreach cmd $commands {
expect "$ "
send "$cmd\r"
expect "password:"
send "$pass\r"
}
# Tidy up
# expect "$ "
# send "exit\r"
# expect eof
# send "close"
}回答 1
Stack Overflow用户
回答已采纳
发布于 2018-01-18 20:14:48
因为您的hosts和commands列表都以空字符串结尾。用puts [list $hosts $commands]验证
所以你发送一个空命令，这就是“按回车”。然后等待密码提示，在1秒内超时，然后继续执行程序.
这是由于您读取文件的方式：read获取文件内容，包括文件的尾换行符。然后，当您在换行符上拆分字符串时，列表将包括尾尾换行符后面的空字符串。
取而代之的是这样做：
set commands [split [read -nonewline $f] "\n"]
# ........................^^^^^^^^^^请参阅https://tcl.tk/man/tcl8.6/TclCmd/read.htm
你也可以这么做
set f [open "commands.txt"]
while {[gets $f line] != -1} {
# skip empty lines and commented lines (optional)
if {[regexp {^\s*(#|$)} $line]} continue
lappend commands [string trim $line]
}
close $f页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/48328971
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