Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...

[reactos.git] / rossubsys / posix / apps / posixw32 / readme.txt

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-$Id: readme.txt,v 1.3 2002/10/29 04:45:05 rex Exp $
-
-posixw32 - a Win32 client terminal emulator for the POSIX+ subsystem
-
-SYNOPSYS
-
-    posixw32 [program]
-
-    program  program to be run in the terminal; if none is given,
-             the shell for the current user (W32 session's) is
-             used.
-
-DESCRIPTION
-
-    posixw32 emulates a DEC VT-100 terminal (on top of the CSRSS
-    subsystem, hence the name) which is the controlling terminal
-    for a process [program] running in the context of the PSX
-    subsystem. posixw32 is a Win32 console application, not a PSX
-    application. The process created by the PSX subsystem on behalf
-    of posixw32 is not the child of the posixw32 instance that
-    requested it. posixw32 simply performs terminal I/O in the CSRSS
-    world (the W32 world!) for [program].
-
-NOTES
-
-    The role of posixw32 is creating a session in the PSX subsystem
-    managing any I/O for it. This is how it works:
-
-    1. posixw32 creates two well known named objects in the system
-       name space that will allow the PSX subsystem server to build
-       the I/O channel for the session. To let the PSX subsystem
-       process recognize the objects, they contain a numeric suffix
-       which is the process identifier (n) the system gives to each
-       instance of posixw32:
-
-           \POSIX+\Session\Pn      LPC port (IPC rendez-vous object)
-           \POSIX+\Session\Dn      section (shared memory object)
-
-       posixw32 also creates a new thread to manage the calls though
-       the LPC port. Port Pn is used by the subsystem to control the
-       terminal which posixw32 emulates.
-
-    2. posixw32 connects to the PSX subsystem session port
-
-           \POSIX+\SessionPort
-
-       and asks the subsystem to create a new session.
-
-    3. The PSX subsystem, if it decides to accept the request, creates
-       a new session for that calling instance of posixw32 (n), and in
-       turn connects back to the terminal control port
-
-           \POSIX+\Session\Pn
-
-    4. When posixw32 makes the PSX subsystem create the new session, it
-       also tells the subsystem what program should be the session
-       leader process. The PSX subsystem creates that process (the
-       image file to start must be marked IMAGE_SUBSYSTEM_POSIX_GUI or
-       IMAGE_SUBSYSTEM_POSIX_CUI).
-
-    5. The requested process [program] runs in the context of the
-       PSX subsystem and performs any terminal I/O via the channel
-       posixw32 and the PSX susbstem created.
-
-REVISIONS
-    2001-05-05 created
-    2002-03-03 simplified
-    2002-06-08 renamed to avoid future name clash
-
-AUTHOR
-
-    Emanuele Aliberti <ea@iol.it>
-
-CREDITS
-
-    John L. Miller (johnmil@cs.cmu.edu, johnmil@jprc.com) code for
-    a basic VT-100 emulator for Win32 consoles is used to process
-    tc* calls output.
-
-EOF