calling a sh command which then asks for a password

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: calling a sh command which then asks for a password by atcroft (Abbot) on Oct 18, 2002 at 12:16 UTC
It might be easier for you to consider using either the Expect or Expect::Simple modules for this. If the program in question is making a connection to a remote device, such as telnet to a router or ssh to a server, then you may wish to look at a module specifically for that, such as Net::Telnet or Net::SSH/Net::SSH::Perl. Others perhaps can help more-I look forward to their comments-but I hope that helps a little. Good luck, and please let us know how it goes and what works for you.	[reply]
Re: calling a sh command which then asks for a password by MZSanford (Curate) on Oct 18, 2002 at 12:54 UTC
The problem maybe the leading newline produced after the `"!";` ... if you try the following it may work better : `open2(\Reader,\Writer, "/usr/tools/prog start"); Writer->autoflush(); print "password\n";` [download] This may still not work. Programs built for security (like `ssh`) often open a new TTY to prevent snooping ... if that's the case, it also prevent STDIN redirections like this. from the frivolous to the serious	[reply] [d/l] [select]
Re: calling a sh command which then asks for a password by joe++ (Friar) on Oct 18, 2002 at 14:41 UTC
Let's assume that you will be connecting over ssh. Then making shh connect without asking for a passwd can be an option. See my note on Connecting to machines for references of how to do this. Note: this is not a Perl solution, you may have to talk to your sysadmins! -- Cheers, Joe	[reply]
Re: calling a sh command which then asks for a password by Anonymous Monk on Oct 18, 2002 at 15:42 UTC
It's not to connect to another machine using ssh, it's just to run a program on the same box that requires a password in order to do so.There must be a simple way ? TIA	[reply]
Re: Re: calling a sh command which then asks for a password by Thelonius (Priest) on Oct 18, 2002 at 16:05 UTC
It's not to connect to another machine using ssh, it's just to run a program on the same box that requires a password in order to do so.There must be a simple way ? In the general case, no. A lot of programs that ask for passwords do not read them from the standard input, they open /dev/tty instead. For those, you'll have to use a telnet/ssh solution. That is, unless they have a command line option to give the password.	[reply]