Path: utzoo!attcan!uunet!cbmvax!ag
From: ag@cbmvax.commodore.com (Keith Gabryelski)
Newsgroups: comp.sys.amiga
Subject: Re: UNIX sys V4.0
Message-ID: <15404@cbmvax.commodore.com>
Date: 25 Oct 90 21:44:34 GMT
References: <9010025@hpfcso.HP.COM>
Reply-To: ag@cbmvax.commodore.com (Keith Gabryelski)
Organization: Commodore-Amiga Unix; West Chester, PA
Lines: 89

In article <9010025@hpfcso.HP.COM> aoe@hpfcso.HP.COM (Alexander Elkins) writes:
>1) How many processes does a "ps -ef" show running immediately after
>entering init state 1 after rebooting?

     UID   PID  PPID  C    STIME TTY      TIME COMD
    root     0     0  0   Oct 23 ?        0:01 sched
    root     1     0  0   Oct 23 ?        3:46 /sbin/init 
    root     2     0  0   Oct 23 ?        0:07 pageout
    root     3     0  0   Oct 23 ?        4:37 fsflush
    root     4     0  0   Oct 23 ?        0:00 kmdaemon
    root     7     1  0   Oct 23 ?        0:47 INITSH -c exec >/dev/cage& 

>2) In other words, is 16Mbytes sufficient to avoid swapping most of
>the time?

16 Mbytes is more than enough.  8Mb is a totally reasonable system.

>4) What is the typical size of the swap area on the disk?  10Mb,
>20Mb, ?

Standard 10Mb.

>5) Does the X Windows server process go through all the same socket
>software layers to receive packets from local client processes that
>it does for networked (remote) client processes?

No.

>6) Does the X Windows server process allow concurrent access to the
>display hardware (chipmemory, blitter, etc) via a resource
>sharing/locking method?

Yes (for chip memeory).  The blitter is not used for X.

>7) Are shared memory segments supported?  I.e. can two, or more
>processes attach the same shared memory segment and read/write to it?

Yes.

>8) Are virtual files supported?  I.e. can a file be opened in such a
>way as to map its contents to an address space in a running process?

You are talk about mmap().  Yes.

>9) Does a system call to brk(1024000) followed by brk(5120) actually
>return the memory to the system for use by other processes or does
>the memory used by a process only increase and not get return to the
>system resource memory pool until it exits?  Which happens?

Memory would be released provided the above two brk() calls were
actually valid.

sbrk(2) accepts a negative value, also.

I think you are talking about sbrk().  sbrk() accepts a negit

>10) What version of gcc comes with the system?  Gcc-1.37.1 would be fairly
>recent.

1.37

>11) Was all the code compiled using gcc?

The system utilities have been compiled with gcc.  The Kernel is
being worked on.

>12) Is the kernel user configurable?  Is this done as a
>compile/link/reboot process or does the kernel dynamically configure
>itself by loading/unloading whatever drivers it needs?

As of now, no.  This is being worked on for final release.

>13) Are ACL's (access control lists) supported?

Not to my know knowledge.

>14) Is file locking supported?
>15) Is ksh (korn shell) included with the system?
>16) Is process suspend/resume supported?

Yes.

>17) Is process tracing supported by the kernel?

truss(1) -p PID.

also adb and sbd of running processes are supported.

Pax, Keith