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Date: Fri, 12 Nov 2010 10:30:05 +0800
Message-ID: <AANLkTimtPb+=xcKa8ef5Lf-f9CNMFG4OavG-ZO8F7C=a@mail.gmail.com>
Subject: Re: how to perform dfs -ls as a request from www
From: Jeff Zhang <zjffdu@gmail.com>
To: common-user@hadoop.apache.org
Cc: core-user@hadoop.apache.org
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If you are using Java Servlet, then you can use HDFS Java API
directly.   Use FileSystem.listStatus instead of call shell, and put
core-site.xml hdfs-site.xml on your classpath.

If you are using other programming language, maybe you can try HDFS's
thrift interface


On Fri, Nov 12, 2010 at 9:33 AM, sudharshan <sudharsan@wayne.edu> wrote:
>
> My question might be a numb but this is where I am stuck now please bear =
with
> me . Basically I want to execute bin/hadoop dfs -ls when a user in a web
> page clicks a button and displays 0 if the command is executed successful=
ly
> and -1 if not executed. I have a script which runs when the user clicks t=
he
> button in the web page. The script contains a system call of
> system(bin/hadoop dfs -ls) . But it is not been executed due to file
> permission of hdfs when issued from www.
> After googling I came to know that hdfs executes commands by identifying =
the
> user only as a superuser. I tried to change the posix permissions of hdfs
> but it took no effect. =C2=A0So can some one help me out?
> Thanks
> --
> View this message in context: http://old.nabble.com/how-to-perform-dfs--l=
s-as-a-request-from-www-tp30195698p30195698.html
> Sent from the Hadoop core-user mailing list archive at Nabble.com.
>
>


--=20
Best Regards

Jeff Zhang