预期产生：没有这样的文件或目录错误

Question

I am writing an Expect script that remotes to a server "server2" and executes fileexists.sh that will find if file exists at a particular location.

Bash script - fileexists.sh is as follows:

 #!/bin/bash if [ -s $1 ]; then echo "non empty file exists." else echo "File doesnot exist or is empty." 

Expect script - expec is as follows:

 #!/usr/bin/expect set username [lindex $argv 0] set password [lindex $argv 1] set hostname [lindex $argv 2] set rfile [lindex $argv 3] set prompt "$username* ~]$ " spawn ssh -q -o StrictHostKeyChecking=no $username@$hostname expect { timeout { puts "\\n\\nConnection timed out" exit 1 } "*assword:" { send "$password\\r" } } expect { "$prompt" { puts "Logged in successfully. } } spawn ./fileexists.sh $rfile set lineterminationChar "\\r" expect { $lineterminationChar { append output $expect_out(buffer);exp_continue} eof { append output $expect_out(buffer)} } puts $output 

When i call the expect script with ./expec user pass server2 /apps/bin/file.p I get output as "File doesnot exist or is empty." although the file exists at its location on server2.

i checked using expect: if {[file exists $rfile]} { puts "file exists" }

And output i get is "file exists".

Seems to be something with spawn that I am unable to figure out.

Answer 1

To check on the remote host, do this (I assume you are logging in to a linux machine, or a machine with GNU stat ): untested

send -- "stat -c '%s' '$rfile'\r"

expect {
    -re {\r\n(\d+)\r\n} {
        puts "$rfile exists with size $expect_out(1,string)"
    }
    -gl {*No such file or directory*} {
         puts "$rfile does not exist"
    }
}

send "exit\r"
expect eof