JPH02150952A - Remote loading system - Google Patents

Abstract

PURPOSE:To obtain a general-purpose and integrated remote loading means by setting a log-in analyzing part and a log-in start part into different computers and at the same time connecting both computers via a general-purpose inter- process contact means. CONSTITUTION:A log-in analyzing process 200 displays an input promotion screen on a display device for a user in the work stations 101 - 103. A log-in program start process 202 always works as a background process at and after the rise time point of the work station and is waiting for a log-in request to be given from the other (its own) computer via an inter-process contact means 203 and an electronic computer network contact means 308. Both means 203 and 208 are realized with the socket calls in a UNIX. Furthermore the socket calls can be equally handled with no identification required between its own computer and the other one. At the same time, a dup call which is required later is also applicable since both read and write modes are available.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a network system that connects a plurality of computers, and particularly to a transmission system suitable for unified remote/local login.

[Conventional technology]

A conventional remote login method is typified by a method called a terminal emulator. These have been commercialized into various products. In addition, as a literature, bit (bi
t) Magazine "87/7 special edition, Computer Network pp 50 54 e PP P17?-178.

(Problem to be solved by the invention) Since the above-mentioned conventional technology is a mere terminal emulator,
If a user wants to use (log in) to another computer, first log in to the inner calculator, then after the command can be started, add an argument so that it becomes the terminal of the computer you want to use. Start a terminal emulator. Then, the inner calculator will become the terminal for the desired calculator, so log in to the desired calculator here.

In this way, conventionally, when logging in to another computer, the procedure is different from when logging in to an inner calculator. Additionally, remote login is possible by combining an existing login program with a terminal emulator, but in this case, the structure of the program becomes complicated, and the processing for logging into the inner calculator and the processing for other computers becomes difficult. There were problems such as significant differences.

The purpose of the present invention is to allow the user to enter a combination of the computer name and user name they wish to log into, to separate the login analysis section and the login initiation section, place each in a separate computer, and to use a general-purpose process interface. The purpose is to provide users with a universal and unified remote login means by linking them using a communication means.

[Means to solve the problem]

The above purpose is to provide an inter-process communication means, a computer network communication means, a login name analysis means, and a user name It has a login program starting means that starts a login program corresponding to the user given the name of the user's computer, and a remote terminal input/output means, and uses the login name analysis means to obtain the computer name and login name requested by the user. Then, according to the specified computer name, the computer network communication means and inter-process communication means send the user name and user computer name to the login program starting means running on the computer, and start the login program. This is achieved by having a means for starting a program by changing the normal input/output of the program to be started using the remote terminal input/output means to the terminal of the user computer.

[Effect]

When a user wants to remotely log in to a specific computer, the user simply adds the name of the computer being used to the user name using the same procedure as when logging in to a regular calculator. . In the internal calculation machine, the login name analysis means first receives the user's input. A login name analysis means separates the computer name and login name requested by the user. At this time, the login name analysis means determines whether the contact is within the same computer. If the user does not specify the name of the computer to be used, the user is logged in to the same computer, that is, to the internal calculator.

If it is within the same computer, the user name and the fact that the request is from the inner calculator are sent to the login program starting means in the inner calculator using only the interprocess communication means.

If the request is for another computer, the user name and source computer name are sent to the login program starting means running on the computer using the computer network communication means and interprocess communication means according to the specified computer name. . If the request is from the same computer, the login program starting means on the computer simply starts the login program corresponding to the user name.

If the request is from another computer, the login program starting means uses the remote terminal input/output means to change the normal input/output of the program to the terminal of the user computer, and then starts the program. As a result, it is possible to unify the operability of the user's own and other dual-point calculators and to generalize the structure and function of the login program system.

〔Example〕

An embodiment of the present invention will be shown below with reference to FIG.

FIG. 1 shows a computer network 201 and a group of workstations 101 to 103 attached to it (O8
indicates UNIX). FIG. 2 shows the software configuration of the login receiving workstation 101,
FIG. 3 is a software configuration of the login receiving workstation 102, FIG. 4 is a flowchart showing the operation of both software, and FIG. 5 is a block diagram of the equipment configuration for realizing this embodiment. It is. Hereinafter, the terms program and process will be used in the sense that program refers to the static state and process refers to the execution state of the program.

On the workstations 101 to 103, the login analysis process 200 is displayed on the display device 501.

An input prompt screen is displayed to the user. Additionally, the login program startup process 202 is a constant background process (
The background process is f
The parent process is started by the ork call, and the parent process is terminated. Or /ate/1nit
If you specify the background using the tab file 206, etc., it will automatically become the background at startup), and use the inter-process communication means 203 and computer network communication means 208 to communicate from other (2) computers. Waiting for login request. The inter-process communication means and the computer network communication means are realized by 5ocket calls in UNIX. Moreover, 5ocket calls can be handled equally without distinguishing between other computers and the own computer. Also,
read is a conventional exploratory input/output.

Since write can be used, a dup call used for switching communication paths that will be required later can also be applied.

In this state, the user inputs the workstation name 102 and user name 105 requesting login from the workstation 101 to the login analysis process 201 . The login analysis process 201 separates the input character string into a workstation name 102 and a user name 105. Using the separated workstation name 102, a communication path is established between the computer network communication means in the computer and the login program starting means 203 on the workstation 102. The communication path is provided in two directions, round trip and round trip. In UNIX 4°3BSD, the communication path is provided by 5ocket related calls.

It is possible to establish inter-process communication paths across networks.

Furthermore, the login program startup process 202 on the workstation 102 normally waits for a request from the login analysis process of its own computer, but it simultaneously and indistinguishably waits for a request from the login analysis process of its own computer. In the example, it waits for a request from workstation 101).

When the login program startup process accepts the request, it uses a dup call to reset the established communication path (with the log analysis process) to the standard input/output that the process normally uses, and then restarts the login program. Start the program.

A login program is a program that interprets a command line input by a user and starts a necessary command sequence, and is usually called 5hell in UNIX. This movement will be explained according to the flowchart in FIG.

Step 401: The 0 gain analysis process (401 to 404 are the flowchart of this process) displays the name of the workstation to be used and a user skill promotion screen.

Step 402 The destination workstation in the input user name (
The request source workstation (here 1ot) and the pure user name are sent as a login request message to the login program startup process running on computer network communication means 102). The same applies to the own computer.

Step 403: When a permission response is returned from the 0 gain program startup process, erase your own display screen so that the 5hell screen that the login program startup process started is displayed through the computer network communication means. do.

Step 404: Wait for the usage end message to arrive from the 0 gain program startup process. If the message has arrived, the process returns to step 401.

Step 405: The 0 gain program startup process (hereinafter referred to as the flow of this process) waits for a login request message from the login analysis process and a termination message from the child process described later.

When a request message arrives, a child process is created. The child process goes to step 407.

The parent process goes to step 401. When the termination message arrives, the computer network communication means transmits the termination message to the requesting workstation that started the child process. Issue a wait call to erase the child process (UNIX-specific processing, in UNIX).

Even if the process ends, it remains as a zombie unless the parent process issues a wait). A termination message is sent to the login analysis process using the inter-process communication means and the computer network communication means. Return to step 405.

407 (child process) Analyzes the message, extracts the name of the requesting workstation, and connects the standard input/output and the requesting terminal using the inter-process connection means and the computer network communication means.

408 (child process) User name registry 207 (/etc/pa on UNIX
Start the program corresponding to the user name registered in sswd).

409 (child process) When the started program finishes, it notifies the parent process as a message.

410 (Parent process) Normally, it waits for the child process to end, but in order to be able to accept multiple login requests, it immediately executes Step 410.
Return to 5.

When sending the above message, inside the calculator.

Only as a means of communication between processes, with other computers.

A computer network communication means is used together with an inter-process communication means. In UNIX, as long as the 5ocket call is used, the computer name and communication range (UN
In IX, one distinction is made by performing domain, area).

Next, effects specific to this embodiment will be described. According to this embodiment, it is possible to support remote login requests from a plurality of computers, and has the effect of improving workstation utilization efficiency.

〔Effect of the invention〕

According to the present invention, the user operation for logging into the own and other computers remains the same, and the processing program group is also common to all computers, improving operability and facilitating system construction. It has an improving effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a computer network and a group of workstations according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the software configuration at a login receiving workstation.
FIG. 3 is an explanatory diagram of the software configuration on the login receiving workstation, FIG. 4 is a flowchart of the operation of both software, and FIG. 5 is a block diagram of the equipment configuration for realizing an embodiment of the present invention. It is a diagram. 101-103...Workstation, 105...
・User name, 200...Login analysis process, 20
2...Login program startup process, 203.
...Inter-process communication means, 206-/etc/1n
ittab file, 207...Usage #registry, 20
8... Computer network communication means, 501... Display device, 502... Keyboard, 503... CPU, 50
4...Magnetic disk, 505...Communication device. 03 ox multi-figure 111-11 pruning λ

Claims (1)

[Claims] 1. In a computer network consisting of a plurality of computer groups and their auxiliary facilities, one computer has an inter-process communication means for exchanging information between running processes, and a computer network that communicates with other computers through the computer network. computer network communication means for exchanging information with each other; login analysis means for receiving input from the user and analyzing which computer the user is requesting to log in under what user name; Login program that starts the login program corresponding to the user given the user name and source computer name.
It has a program startup means and a remote terminal input/output means for changing the process input/output from the normal local terminal to the terminal of another computer via the network, and analyzes the computer name and login name requested by the user. According to the separated computer name, the user name and user computer name are sent to the login program starting means running on the computer using the computer network communication means and the inter-process communication means to log in. - A remote login method characterized in that the program starting means uses a remote terminal input/output means to change the normal input/output of the program to be started on the terminal of the user computer.