executing remote command

5 Message(s) by 4 Author(s) originally posted in java developer

From: cazq1998

Date: Tuesday, July 27, 2004

Hi, anyone can help me?

I'm working on windows and I want to execute

<operating system, programming> The process of carrying out
	the {instructions} in a computer program by a computer.

	See also {dry run}.

	(1996-05-13)

a command

<operating system> A character string which tells a program to
	perform a specific action.  Most commands take {arguments}
	which either modify the action performed or supply it with
	input.  Commands may be typed by the user or read from a file
	by a {command interpreter}.  It is also common to refer to
	menu items as commands.

	(1997-06-21)

on a remote
computer (Unix

<operating system> /yoo'niks/ (Or "UNIX", in the authors'
	words, "A weak pun on Multics") Plural "Unices".  An
	interactive {time-sharing} {operating system} invented in 1969
	by {Ken Thompson} after {Bell Labs} left the {Multics}
	project, originally so he could play games on his scavenged
	{PDP-7}.  {Dennis Ritchie}, the inventor of {C}, is considered
	a co-author of the system.

	The turning point in Unix's history came when it was
	reimplemented almost entirely in C during 1972 - 1974, making
	it the first {source-portable} OS.  Unix subsequently
	underwent mutations and expansions at the hands of many
	different people, resulting in a uniquely flexible and
	{developer}-friendly environment.

	By 1991, Unix had become the most widely used {multi-user}
	general-purpose operating system in the world.  Many people
	consider this the most important victory yet of hackerdom over
	industry opposition (but see {Unix weenie} and {Unix
	conspiracy} for an opposing point of view).

	Unix is now offered by many manufacturers and is the subject
	of an international standardisation effort [called?].
	Unix-like operating systems include {AIX}, {A/UX}, {BSD},
	{Debian}, {FreeBSD}, {GNU}, {HP-UX}, {Linux}, {NetBSD},
	{NEXTSTEP}, {OpenBSD}, {OPENSTEP}, {OSF}, {POSIX}, {RISCiX},
	{Solaris}, {SunOS}, {System V}, {Ultrix}, {USG Unix}, {Version
	7}, {Xenix}.

	"Unix" or "UNIX"?  Both seem roughly equally popular, perhaps
	with a historical bias toward the latter.  "UNIX" is a
	registered trademark of {The Open Group}, however, since it is
	a name and not an acronym, "Unix" has been adopted in this
	dictionary except where a larger name includes it in upper
	case.  Since the OS is {case-sensitive} and exists in many
	different versions, it is fitting that its name should reflect
	this.

	{The UNIX Reference Desk
	(http://www.geek-girl.com/unix.html)}.

	{Spanish fire extinguisher
	(ftp://linux.mathematik.tu-darmstadt.de/pub/linux/people/okir/unix_flame.gif)}.

	[{Jargon File}]

	(2001-05-14)

) so I try to make a telnet to the specified server

1. A program which provides some service to other ({client})
	programs.  The connection between client and server is
	normally by means of {message passing}, often over a
	{network}, and uses some {protocol} to encode the client's
	requests and the server's responses.  The server may run
	continuously (as a {daemon}), waiting for requests to arrive
	or it may be invoked by some higher level daemon which
	controls a number of specific servers ({inetd} on {Unix}).

	There are many servers associated with the {Internet}, such as
	those for {HTTP}, {Network File System}, {Network Information
	Service} (NIS), {Domain Name System} (DNS), {FTP}, {news},
	{finger}, {Network Time Protocol}.  On Unix, a long list can
	be found in /etc/services or in the {NIS} database "services".
	See {client-server}.

	2. A computer which provides some service for other computers
	connected to it via a network.  The most common example is a
	{file server} which has a local disk and services requests
	from remote clients to read and write files on that disk,
	often using {Sun}'s {Network File System} (NFS) {protocol} or
	{Novell Netware} on {PCs}.  Another common example is a {web
	server}.

	[{Jargon File}]

	(2003-12-29)

but
I did not get any answer. My code

<software> Instructions for a computer in some programming
	language, often {machine language}.  The word "code" is often
	used to distinguish instructions from {data} (e.g. "The code
	is marked 'read-only'") whereas "{software}" is used in
	contrast with "{hardware}" and may consist of more than just
	code.

	(2000-04-08)

is really simple. I DO not WANT TO USE
SOCKETS OR ANY OTHER PROGRAM IN THE SERVER.

Can anyone give some advice, or any suggestion?

SOURCE CODE (this is the source

<language, programming> (Or "source", or rarely "source
	language") The form in which a computer program is written by
	the programmer.  Source code is written in some formal
	programming language which can be compiled automatically into
	{object code} or {machine code} or executed by an
	{interpreter}.

	(1995-01-05)

code that I'm using)
-------------------------

import JAVA.io.*;

class test{

public test(){}
public void process

1. <operating system, software> The sequence of states of an
	executing {program}.  A process consists of the program {code}
	(which may be shared with other processes which are executing
	the same program), private data, and the state of the
	{processor}, particularly the values in its {registers}.  It
	may have other associated resources such as a {process
	identifier}, open files, {CPU time} limits, {shared memory},
	{child processes}, and {signal handlers}.

	One process may, on some {platforms}, consist of many
	{threads}.  A {multitasking} {operating system} can run
	multiple processes {concurrently} or in {parallel}, and allows
	a process to spawn "child" processes.

	(2001-06-16)

	2. <business> The sequence of activities, people, and systems
	involved in carrying out some business or achieving some
	desired result.  E.g. software development process, project
	management process, configuration management process.

	(2001-06-16)

(){
try {
// Execute command
String command = "telnet";
Process child

<mathematics, data> (Or "child", "successor") In a {tree}, a
	{node} pointed to by a {parent}, i.e. another node closer to
	the {root node}.

	(1998-11-14)

= Runtime.getRuntime().exec(command);

OutputStream out = child.getOutputStream();
out.write("open

1. To prepare to read or write a file.  This usually involves
	checking whether the file already exists and that the user has
	the necessary authorisation to read or write it.  The result
	of a successful open is usually some kind of {capability}
	(e.g. a {Unix} {file descriptor}) - a token that the user
	passes back to the system in order to access the file without
	further checks and finally to close the file.

	2. Abbreviation for "open (or left) parenthesis" - used when
	necessary to eliminate oral ambiguity.  To read aloud the LISP
	form (DEFUN FOO (X) (PLUS X 1)) one might say: "Open defun
	foo, open eks close, open, plus eks one, close close."

	3. Non-proprietary.  An open {standard} is one which can be
	used without payment.

	[{Jargon File}]

	(1995-01-31)

<SERVER_NAME>\n".getBytes()); // Get the input stream and read from it
Input

<architecture> {Data} transferred from the outside world into
	a computer system via some kind of {input device}.

	Opposite: {output}.

	(1997-04-28)

Stream in = child.getInputStream();
int

1. <programming> A common name for the {integer} data type.
	In {C} for example, it means a (signed) integer of the
	computer's native {word length}.

	2. <networking> The {top-level domain} for international
	organisations.

	(1999-01-26)

c;
while ((c = in.read()) != -1) {
System.out.print(""+(char)c);
}
out.write("my_user\n".getBytes());
while ((c = in.read()) != -1) {
System.out.print(""+(char)c);
}
out.write("\n".getBytes());
while ((c = in.read()) != -1) {
System.out.print(""+(char)c);
}
out.write("touch carlos.txt".getBytes());
out.write("exit".getBytes());
in.close();
out.close();
} catch (IOException e) { System.out.println(e.getMessage());
}

}

public static void main(String args[]){
test uno = new test();
uno.process();
}
}

From: Cid

Date: Tuesday, July 27, 2004

wrote in message

In {object-oriented programming} sending a message to an
	{object} (to invoke a {method}) is equivalent to calling a
	{procedure} in traditional programming languages, except that
	the actual code executed may only be selected at run time
	depending on the {class} of the object.  Thus, in response to
	the message "drawSelf", the method code invoked would be
	different if the target object were a circle or a square.

	(1995-02-16)

Hi, anyone can help me?
I'm working on windows and I want to execute a command on a remote
computer (Unix) so I try to make a telnet to the specified server but
I did not get any answer. My code is really simple. I DO not WANT TO USE
SOCKETS OR ANY OTHER PROGRAM IN THE SERVER.
Can anyone give some advice, or any suggestion?
SOURCE CODE (this is the source code that I'm using)
-------------------------
import JAVA.io.*;
class test{
public test(){}
public void process(){
try {
// Execute command
String command = "telnet";
Process child = Runtime.getRuntime().exec(command);
OutputStream out = child.getOutputStream();
out.write("open <SERVER_NAME>\n".getBytes());
// Get the input stream and read from it
InputStream in = child.getInputStream();
int c;
while ((c = in.read()) != -1) {
System.out.print(""+(char)c);
}
out.write("my_user\n".getBytes());
while ((c = in.read()) != -1) {
System.out.print(""+(char)c);
}
out.write("\n".getBytes());
while ((c = in.read()) != -1) {
System.out.print(""+(char)c);
}
out.write("touch carlos.txt".getBytes());
out.write("exit".getBytes());
in.close();
out.close();
} catch (IOException e) { System.out.println(e.getMessage());
}
}
public static void main(String args[]){
test uno = new test();
uno.process();
}
}

Hmm, never tried this so I'm guessing. But it might be an issue that
your touch and exit commands do not have terminating line

1. <hardware> An electrical conductor.  For distances larger
	than a breadbox, a single line may consist of two electrical
	conductors in twisted, parallel, or concentric arrangement
	used to transport one logical signal.

	By extension, a (usually physical) medium such as an {optical
	fibre} which carries a signal.

	(1995-09-29)

feeds which
the shell is probably waiting for. Does it even get that far?

From: cazq1998

Date: Tuesday, July 27, 2004

No, I already try with this and it's not working,
anyone can help me?

wrote in message
wrote in message:
Hmm, never tried this so I'm guessing. But it might be an issue that
your touch and exit commands do not have terminating line feeds which
the shell is probably waiting for. Does it even get that far?

From: Nigel Wade

Date: Wednesday, July 28, 2004

wrote in message:

Hi, anyone can help me?
I'm working on windows and I want to execute a command on a remote
computer (Unix) so I try to make a telnet to the specified server but
I did not get any answer. My code is really simple. I DO not WANT TO USE
SOCKETS OR ANY OTHER PROGRAM IN THE SERVER.
Can anyone give some advice, or any suggestion?

I'm not totally sure, but I do not think telnet uses standard

<standard> Standards are necessary for {interworking},
	{portability}, and {reusability}.  They may be {de facto
	standards} for various communities, or officially recognised
	national or international standards.

	{Andrew Tanenbaum}, in his Computer Networks book, once said,
	"The nice thing about standards is that there are so many of
	them to choose from", a reference to the fact that competing
	standards become a source of confusion, division,
	obsolescence, and duplication of effort instead of an
	enhancement to the usefulness of products.

	Some bodies concerned in one way or another with computing
	standards are {IAB} ({RFC} and {STD}), {ISO}, {ANSI}, {DoD},
	{ECMA}, {IEEE}, {IETF}, {OSF}, {W3C}.

	(1999-07-06)

input and
standard output

<architecture> {Data} transferred from a computer system to
	the outside world via some kind of {output device}.

	Opposite: {input}.

	(1997-04-28)

for the prompts and to read userid/password. I think it
opens the controlling terminal

1. <hardware> An electronic or electromechanical device for
	entering data into a computer or a communications system and
	displaying data received.  Early terminals were called
	{teletypes}, later ones {VDUs}.  Typically a terminal
	communicates with the computer via a {serial line}.

	2. <electronics> The end of a {line} where signals are either
	transmitted or received, or a point along the length of a line
	where the signals are made available to apparatus.

	3. <electronics> Apparatus to send and/or receive signals on a
	{line}.

	(1995-10-02)

directly.

I believe under UNIX you can use pseudo-ttys to do this sort

1. <application, algorithm> To arrange a collection of items
	in some specified order.  The items - {records} in a file or
	data structures in memory - consist of one or more {fields} or
	members.  One of these fields is designated as the "sort key"
	which means the records will be ordered according to the value
	of that field.  Sometimes a sequence of key fields is
	specified such that if all earlier keys are equal then the
	later keys will be compared.  Within each field some ordering
	is imposed, e.g. ascending or descending numerical, {lexical
	ordering}, or date.

	Sorting is the subject of a great deal of study since it is a
	common operation which can consume a lot of computer time.
	There are many well-known sorting {algorithms} with different
	time and space behaviour and programming {complexity}.

	Examples are {quicksort}, {insertion sort}, {bubble sort},
	{heap sort}, and {tree sort}.  These employ many different
	data structures to store sorted data, such as {arrays},
	{linked lists}, and {binary trees}.

	2. <tool> The {Unix} utility program for sorting lines of
	files.

	{Unix manual page}: sort(1).

	(1997-02-12)

of thing,
like the application

1. {application program}.

	2. {function application}.

'expect' does. Do not ask me how...

Other than that, you might've to open a Socket to the telnet port
whether you want to or not.

--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@xxxxxxxxxxx
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555

From: zoopy

Date: Wednesday, July 28, 2004

wrote in message:

Hi, anyone can help me?

Hello again.

I'm working on windows and I want to execute a command on a remote
computer (Unix) so I try to make a telnet to the specified server but
I did not get any answer. My code is really simple. I DO not WANT TO USE
SOCKETS OR ANY OTHER PROGRAM IN THE SERVER.
Can anyone give some advice, or any suggestion?

See my reply

See {followup}.

in comp.lang.JAVA.help

Regards,
Z.

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