How to supply password to runas command when executing it from java

Question

I have to run a batch files from a java program which need administrative privilege. I am using the below command

runtime.getruntime().exec("runas /user:Admin \"C:\\Program Files\\test.bat\"");

but when it get executed its prompt for the password for the Admin account. How can I give the password for it.

score 11 · Answer 1 · answered Apr 16 '13 at 10:21

11

You can't pipe a password into runas, as it requests the password from the terminal, not from stdin. There's no equivalent of "sudo -s".

answered Apr 16 '13 at 10:21

user2286013

Thank you for an insightful answer that makes sense :) – Rolf Mar 21 '16 at 23:54
1

This is the only correct (and should be accepted) answer. – Jay Dadhania Jan 29 '21 at 12:09

score 3 · Accepted Answer · edited Oct 12 '16 at 16:15

3

Try this

runtime.getruntime().exec("cmd /C echo YOUR_PASS | runas /user:Admin \"C:\Program Files\test.bat\"");

edited Oct 12 '16 at 16:15

kapex

answered May 30 '12 at 06:50

yatul

File exception java.io.IOException: Cannot run program "echo": – Muzy May 30 '12 at 07:02
1

I don't have a windows machine to hand, but can you try "cmd.exe /C echo" instead of "echo"? – Simon Nickerson May 30 '12 at 07:10
Yep, this helps to call echo cmd. fix this in answer – yatul May 30 '12 at 07:17
1

@Muzy Keep in mind that when you use `runas`, the initial current folder for the spawned process will change to `%SYSTEM%\system32` – Doc Dec 18 '13 at 22:55
1

This works? If I try, it doesn't think my password is correct. If I just run "cmd /C echo|set /p=pwd | runas /user:Admin "cmd"" in a command line, it tells me I have the wrong password, when I don't! – Feytality Dec 22 '15 at 20:58
1

Does not work for me. Piping the password does not work in Windows 7. – Daniel Feb 03 '16 at 13:19
1

Can we get an edit on this question? The accepted answer is clearly wrong and doesn't work. There is a correct answer below but doesn't give a workaround. – Forbin Feb 03 '20 at 16:35

score -1 · Answer 3 · answered May 30 '12 at 06:52

-1

when i was kid a did this

echo Pa$$W0Rd | some_command_expects_it

answered May 30 '12 at 06:52

triclosan

1

File exception java.io.IOException: Cannot run program "echo": – Muzy May 30 '12 at 07:03

3 Answers3