Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re^3: passwords with special characters are trying to kill me... no seriously!

by ikegami (Pope)
on Feb 04, 2011 at 17:55 UTC ( #886262=note: print w/replies, xml ) Need Help??


in reply to Re^2: passwords with special characters are trying to kill me... no seriously!
in thread passwords with special characters are trying to kill me... no seriously!

It's easy if you build the command in stages.

sub text_to_shell_lit(_) { return $_[0] if $_[0] =~ /^[a-zA-Z0-9_\-]+\z/; my $s = $_[0]; $s =~ s/'/'\\''/g; return "'$s'"; } my $user = 'bob'; my $passwd = 'test$ing'; my $echo_cmd = join ' ', map text_to_shell_lit, echo => $passwd; my $passwd_cmd = join ' ', map text_to_shell_lit, passwd => '--', $user; my $ssh_cmd = join ' ', map text_to_shell_lit, ssh => 'hostname', "$echo_cmd | $passwd_cmd";
ssh hostname 'echo '\''test$ing'\'' | passwd -- bob'

Note that command lines are readable by anyone on the machine. It is not safe to pass passwords in command lines. Yet another reason why opening a pipe to ssh is better.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://886262]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (4)
As of 2017-02-26 10:26 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Before electricity was invented, what was the Electric Eel called?






    Results (372 votes). Check out past polls.