Maybe the command doesn't accept input through stdin. If this is a unix-ish system and something like this the following doesn't work from the command line, then look into Expect or the command line expect:
command <<EOT
pwd1
pwd2
EOT

[download]
Updated wording.

Update: Original post has been updated so this and any other answers no longer make any sense. Bad OP. Bad, bad OP. BTW, The 'EOT' thing is a "here doc" and is generally a unix concept (though there is the same sort of thing from within perl).

In reply to Re: Passing password with command by runrig
in thread Passing password with command by neha_perl_help

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