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console.c | ||
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posixw32.c | ||
posixw32.h | ||
posixw32.rc | ||
readme.txt | ||
vt100.c | ||
vt100.h |
$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