expect 赋值shell变量_如何在Expect条件语句中使用Bash脚本变量

I am writing a Bash script and using Expect to do sftp. Now in the Expect block I want to access a Bash variable in a conditional statement. But, I am unable to do so. How can do this?

Also, the execution of this script is controlled from a C program and I want redirect the output to a log file (which again is dynamic). Can I do that and suppress all the output on standard output.

Here is the code:

!/usr/bin/bash

host=$1

user=$2

pass=$3

action=$4

path=$5

echo "Starting...."

function doAction {

strAction="\""$action"\""

echo $strAction

/usr/bin/expect < logfile.txt

**set bashaction $strAction**

spawn sftp $user@$host

expect "password:"

send "$pass\r"

expect"sftp>"

send "cd $path\r"

**if {$bashaction == "TEST"} {**

expect "sftp>"

send "prompt\r"

}

expect "sftp>"

send

expect "sftp>"

send_user "quit\n"

exit

EOF

}

doAction

echo "DONE....."

For 1. using an Expect script instead worked.

For the logging issue, using log_user 0 and log_file -a helped.

解决方案

You don't need to use Bash. Expect can handle all that:

#!/usr/bin/expect

set host [lindex $argv 0]

set user [lindex $argv 1]

set pass [lindex $argv 2]

set action [lindex $argv 3]

set path [lindex $argv 4]

puts "Starting...."

puts "\"$action\""

spawn sftp $user@$host

expect "password:"

send "$pass\r"

expect"sftp>"

send "cd $path\r"

if {$action == "TEST"} {

# Do something

} else {

# Do something else

}

expect "sftp>"

send_user "quit\r"

puts "DONE....."

Coming from Bash, the Tcl/Expect syntax is a little strange, but you should not have any problem expanding the above skeleton.