307 lines
9.7 KiB
Plaintext
307 lines
9.7 KiB
Plaintext
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The POSIX subsystem is modeled closely on the OS2 subsystem - I've re-arranged
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and renamed the files so that it will be easier to compare functionality.
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There is a problem with POSIX running in a window when a process forks
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that is probably due to the fact that keeping track of mulitple sessions
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is not done properly. Look at session.c in os2 and compare that code wiht
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posix.
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The arguments to exec are not getting through properly.
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It would be a good idea to check build.log after a complete build for warnings.
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I haven't done that in a while.
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The posix header files are not complete. They should be fleshed out (look
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at the xenix headers on you mail machine) so that the NIST tests will compile
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and so th languages guys know where conflicts may arise when they do the
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merge of the posix headers and c runtimes into their main source tree.
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On exit, smcomplete session has been returning c0000008 for a long time
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and I haven't taken time to track that down.
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See note 6 below re Console IO. I have no test (we need a simple shell)
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that does stdin as yet so that is not tested.
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Good luck!!
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POSIX STATUS
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Nov 15, 1990 Feb 15, 1991
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Total functions: 97
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Done 44 60
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Optional (debatable) 12
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--
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Unimplemented 41 25
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Process Primitives
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fork /
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execl /
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execv /
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execle /
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execve /
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execlp convert file to path using PATH env variable
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execvp "
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wait /
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waitpid /
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_exit /
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kill /
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sigemptyset / NOTE 1
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sigfillset /
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sigdelset /
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sigismember /
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sigaction /
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sigprocmask /
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sigpending
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sigsuspend /
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alarm /
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pause /
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sleep /
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Process Environment
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getpid /
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getppid /
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getuid /
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geteuid /
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getgid /
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getegid /
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setuid
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setgid
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getgroups
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getlogin
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cuserid
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getpgrp /
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setsid /
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setpgid /
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uname /
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time /
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times /
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getenv
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ctermid
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ttyname
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isatty
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sysconf /
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Files and Directories
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opendir / NOTE 2 re file times updating
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readdir /
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rewinddir /
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closedir /
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chdir /
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getcwd /
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open /
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creat /
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umask /
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link NOTE 3
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mkdir / NOTE 4
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mkfifo / NOTE 4
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unlink NOTE 3
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rmdir /
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rename NOTE 3 - and how does this relate to C runtime version??
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stat / Always fail? - see comment fdapi.c, NT security chapter
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fstat / NOTES 2, 3, 4
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access / Needs RtlMakePosixAcl from JimK
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chmod / Needs RtlIntrepretPosix and NtSetSecurityObject (JimK)
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chown / Some open issues - su priv, security routines work?
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utime / Need NT to POSIX uid/gid translations
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pathconf / Done for now - need NtFsControlFile for configurable
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fpathconf /
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Input and Output Primitives
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pipe /
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dup /
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dup2 /
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close /
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read /
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write /
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fcntl
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lseek /
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Device and Class Specific Functions
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cfgetispeed ( All optional ???)
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cfgetospeed ( tonye may be source for tty support - he's doing)
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cfsetispeed ( serial drivers)
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cfsetospeed
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tcgetattr
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tcsetattr
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tcsendbreak
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tcdrain
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tcflush
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tcflow
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tcgetpgrp
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tcsetpgrp
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Language-Specific Services for the C Programming Language
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setlocale
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fileno /
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fdopen
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sigsetjmp
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siglongjmp
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tzset
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System Databases
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getgrgid
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getgrnam
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getpwuid
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getpwnam
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-----------------------------
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NOTE 1
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Re: signals
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In order to make NT exception handling available to PSX processes,
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check for exceptions in apiloop using exception port and convert
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to signals.
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NOTE 2
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Re: file times updating.
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Implementing this for all relevant file systems functions will
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need to be postponed until NTFS. GaryKi has been given a list
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of PSX requirements for times updating. For now POSIX uses the
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times from NtQueryInformationFile for all but local pipes. Local
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pipe times are updated in the subsystem.
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See filereqs.psx in POSIX directory.
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NOTE 3
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Re: link and unlink and rename -
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Implementing this will need to be postponed until NTFS. The Pinball
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FS does not implement links right now since OS2 doesn't use them.
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The POSIX file system will be NTFS. GaryKi and TomM have been
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contacted about this requirement. Check changes to 1.003a re
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symbolic links.
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NOTE 4
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Re: security
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When security code is complete - these functions need to check
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the ACL and/or UID GID SID info appropriately. See Security section
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of workbook - chapter 14. Mike Massa (mikemas) is working on
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security as he ports streams over to NT and POSIX. He was planning
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to write conversion functions (cracking ACLs to get POSIX rwx access)
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that should be used by the subsystem also.
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TODO
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1. Details are missing in the pre-ellen functions (such as setting uid,
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file times etc in file functions). Go over all functions carefully to
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see that they are FULLY functional re: spec.
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2. Operations on local pipes need to update the times in the ionode.
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Pipe() initializes these. Open, read and write (other??) need to
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update manually.
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3. When security is in place re: ACLs on files - all functions manipulating
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and/or accessing file modes (access, open, fstat, chmod) must translate
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between POSIX file permissions and NT ACLs and update appropriately.
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4. Many routines in fdapi have to open the file (NtOpen) to get a handle
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for other routines. Check NtOpens actions on the file times of the file
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vs what's supposed to happen to those times via the posix routine.
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5. Check into all routines that say they must be fixed to work with
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view memory (grep for view).
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6. (This may negate some comments above.) ALL I/O except OPEN, PIPES, and FILE
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LOCKING needs to be moved into the client and out of the server. read,
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write, stat, etc. NOTE: FileRead and FileWrite functions in psxfile.c use
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NtReadVirtualMemory and NtWriteVirtualMemory to transfer the data
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to be read from or written to the file between the user buffer and the
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server buffer. This is a STOPGAP ONLY measure required for POSIX
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to work now that NTWriteFile no longer accepts a parameter specifying that
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the write should be done to an alternate process' data. When this code is
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moved out into the client and done strictly in the client's space, this
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code is obviously unnecessary.
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Currently, Console IO is caught at the client level (see IS_CONSOLE_IO
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in dllio.c) and vectored off to the posix.exe to do the proper windows
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crt read and write.. This should be done as os2 does it (os2 has all io
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on the client side) using a vector of functions and not special-casing.
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(See IoVectorArray in os2\client\dllhandl.c).
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7. There are lots of places in the client code where the user parameters
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(ptrs to) are taken at face value and not checked. These should be probed
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for read and write access before using. Esp uname times time wait waitpid etc
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in pdxproc.c).
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8. The POSIX C Runtimes (crts) are incomplete and patched together and
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not merged into the regular source tree. Languages (jeffrob) are
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supposed to do this 'any time now'. Until this work is done (which
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includes supplying header files that do not conflict with posix header
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files), building apps and tests is iffy. NIST testing is virtually
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impossible. Currently I have a patched together studio.h in inc\posix
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so that printf will work.
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When this work is done, mainCRTstartup() may change names. It will have
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to be changed in rtl/startup.c to match what is in the runtime.
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CONTACTS: jeffrob, gregf (jeff's boss) Get LOUP to follow up.
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9. MIPS builds with only one warning - due to that fact that the MIPS
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version of the CONTEXT_TO_PROGRAM_COUNTER macro in ntmips.h is
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wrong (should be cast to a PVOID). Update - I haven't built for MIPS
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since March 1991.
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TESTING issues
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STAT - test 'real' code when NtQuerySecurityObject is fixed.
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NIST tests - SteveSc has loaded them onto a system and will try to
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build with the posix runtimes that mukund did last summer. THis may
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be a frustrating experience until we have 'real'crts and headers from
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languages.
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*************************************************************************
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CRT INFO - this is mail from the student who fixed up a POSIX CRT for me.
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This work needs to be merged into the languages CRT tree and built
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regularly.
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Here's a list of the POSIX related stuff that has to be done to assimilate the stuff back into the tree:
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Heap, String, Convert, Misc: The code is the same as WIN32.
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Stdio : Changes littered along the souce code. Could probably be put in the source tree directly.
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Time : An issue that will be resolved. The POSIX version is based on the C7 code, and uses floating point.
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Startup: Code based on WIN32 version. Only stdenvp.c and crt0msg.c has any new code.
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Setjmp and Lngjmp: to be done.
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Include files: Most of them could be put in the tree directly. There are a few POSIX specific include files
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(dirent.h, grp.h, pwd.h, sys\wait.h, sys\utsname.h, sys\termios.h, sys\times.h, unistd.h) that have to be added. Additional macros are defined in the POSIX version of stat.h and the POSIX version of types.h defines some additonal types.
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The POSIX source files can be found on \\crt1\vangogh in a
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directory called posix. The posix-specific include files can
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be found in \posix\psxinc.
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I had a really good time working here this summer and I want to thank all of you for making it such a good experience.
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Mukund
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The server is:
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\\vangogh\rdcrt1 password: QIEPCKE
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The tree is: \posix.
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-Gregf
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*************************************************************************
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RtlUnixPathToNtPath()
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Consult with SteveWo to sort out what should be done here.
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We need to be able to designate the posix file system(s) (ntfs only due
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to links needing to be supported) and how to translate pathname
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(eg \posix) to filesystem (eg what used to be \\harddiskX\partitionY\posix)
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for NT.
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Call RtlPosixPathToNtPath in client wherever a path argument is passed in.
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There is currently a RtlDosPathToNtPath() function to use as a guide.
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