Unexpected output found while executing sudo command

Question

When I execute the following command in the terminal, it executes as expected i.e. it displays the current folder contents.

echo <password> | sudo -u root -S ls

But if i execute the same command in my java application, its output is:

<password> | sudo -u root -S ls

How do I overcome this?

java does not execute processes using a shell, and you are using shell metacharacters '|'. there are numerous answers already on SO and the web specifying how to do this. — jtahlborn
– jtahlborn, Commented Aug 9, 2013 at 12:41
Have you tried to execute sh -c "echo sanovi | sudo -u root -S ls" instead? — Fabian Henze
– Fabian Henze, Commented Aug 9, 2013 at 13:04
@FabianHenze I tried ur suggestion. But no success. Any other suggestions? — AlwaysALearner
– AlwaysALearner, Commented Aug 14, 2013 at 8:02

AlwaysALearner · Accepted Answer · 2013-08-09 13:26:08Z

2

When you execute it in the shell, the shell splits the command line according to normal shell rules, i.e. you get "execute echo with parameter <password>, pipe the result to sudo ...".

Java doesn't use the shell, so you're getting "execute echo with parameter <password> | sudo -u root -S ls".

edited Aug 9, 2013 at 13:26

AlwaysALearner

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answered Aug 9, 2013 at 13:17

creinig

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