09-07-2017
Why are you programming shell scripts inside expect?!
Use ssh as intended and you will have no need to use expect to automate the shell.
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9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am rather new to using expect and have only written a few scripts using it. I am trying to create a script that will read a file containing a number of hostnames and then for each one: ssh into the box, run a command, scp the output back to a center server.
So far I can make all that... (2 Replies)
Discussion started by: finnje
2 Replies
2. UNIX for Dummies Questions & Answers
I am trying to write a script that telnets out to multiple ip's, runs some commands exits and the telnets to the next ip. I wrote the following script and it works great until the program hits a nonresponsive ip.
I would like this to recognize the ip is bad and move on in the foreach loop. How... (4 Replies)
Discussion started by: pbaets01
4 Replies
3. Shell Programming and Scripting
I am using Expect to spawn a command that loops through a text file and runs the same command for each item in the text file.
The text file, named stat.txt looks something like this:
2007-04 alist 543
2008-07 blist 543
2008-03 xlist 345
2008-03 ylist 675
2003-03 zlist 567
The expect... (1 Reply)
Discussion started by: manouche
1 Replies
4. Shell Programming and Scripting
Hi all,
I have got a small expect script like this one.
#!/usr/bin/expect -f
set timeout 2
spawn ftp $env(IP)
match_max 100000
expect -exact "Name"
send -- "$env(USER)\n"
expect -exact "Password:"
send -- "$env(PASSWORD)\n"
expect "%"
send "bin\r"
expect "%"
send "prompt\r"... (5 Replies)
Discussion started by: stinkefisch
5 Replies
5. Shell Programming and Scripting
Hi experts,
I have two question about expect script
questions 1
send "tar -xjvf a.tar\r"
send "ifconfig\r"
I want to know if it just run "ifconfig after "tar -xjvf a.tar complete. or the two cmd run at the same time
question 2
after I use the expect to ssh to the... (1 Reply)
Discussion started by: yanglei_fage
1 Replies
6. Shell Programming and Scripting
I'm having some difficulty with convincing Expect to do what I need..
I have a loop that waits for input, a specific phrase of text followed by a single word. I need Expect to capture that word following the specific phrase. It should then store the word in a variable.
I'm fairly sure it's... (6 Replies)
Discussion started by: LongLeafTea
6 Replies
7. Shell Programming and Scripting
Hi.,
I need to ask question for expect script.
I have prompt like #
and very long script (orachk).
I added to expect script line
set prompt "(%|#|\\\$) $"
and insert into it also piece of code
----
expect {
timeout {
puts "Running..."
exp_continue
}
... (0 Replies)
Discussion started by: beckss
0 Replies
8. UNIX for Beginners Questions & Answers
Have an expect script but can't seem to de-bug it. It's stalling at the password prompt. If anyone can see a mistake, kindly let me know. Thanks.
Here is the error:
spawn ssh -o StrictHostKeyChecking=no user@xx.xx.xx.xx rpm -qa
# Warning! You have entered into a secured area! #
# All... (2 Replies)
Discussion started by: jimmyf
2 Replies
9. UNIX for Beginners Questions & Answers
I'm using expect to log into a remote host and then execute another script. A log of the script is being created but I can't see to get the script to display while it's running. Any ideas would be appreciated. Here is the script.
#!/bin/bash
cd /root
cat /root/hostname1.txt | while read... (1 Reply)
Discussion started by: jimmyf
1 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)