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minix/commands/scripts/MAKEDEV.sh
Cristiano Giuffrida cb176df60f New RS and new signal handling for system processes. 
UPDATING INFO:
20100317:
        /usr/src/etc/system.conf updated to ignore default kernel calls: copy
        it (or merge it) to /etc/system.conf.
        The hello driver (/dev/hello) added to the distribution:
        # cd /usr/src/commands/scripts && make clean install
        # cd /dev && MAKEDEV hello

KERNEL CHANGES:
- Generic signal handling support. The kernel no longer assumes PM as a signal
manager for every process. The signal manager of a given process can now be
specified in its privilege slot. When a signal has to be delivered, the kernel
performs the lookup and forwards the signal to the appropriate signal manager.
PM is the default signal manager for user processes, RS is the default signal
manager for system processes. To enable ptrace()ing for system processes, it
is sufficient to change the default signal manager to PM. This will temporarily
disable crash recovery, though.
- sys_exit() is now split into sys_exit() (i.e. exit() for system processes,
which generates a self-termination signal), and sys_clear() (i.e. used by PM
to ask the kernel to clear a process slot when a process exits).
- Added a new kernel call (i.e. sys_update()) to swap two process slots and
implement live update.

PM CHANGES:
- Posix signal handling is no longer allowed for system processes. System
signals are split into two fixed categories: termination and non-termination
signals. When a non-termination signaled is processed, PM transforms the signal
into an IPC message and delivers the message to the system process. When a
termination signal is processed, PM terminates the process.
- PM no longer assumes itself as the signal manager for system processes. It now
makes sure that every system signal goes through the kernel before being
actually processes. The kernel will then dispatch the signal to the appropriate
signal manager which may or may not be PM.

SYSLIB CHANGES:
- Simplified SEF init and LU callbacks.
- Added additional predefined SEF callbacks to debug crash recovery and
live update.
- Fixed a temporary ack in the SEF init protocol. SEF init reply is now
completely synchronous.
- Added SEF signal event type to provide a uniform interface for system
processes to deal with signals. A sef_cb_signal_handler() callback is
available for system processes to handle every received signal. A
sef_cb_signal_manager() callback is used by signal managers to process
system signals on behalf of the kernel.
- Fixed a few bugs with memory mapping and DS.

VM CHANGES:
- Page faults and memory requests coming from the kernel are now implemented
using signals.
- Added a new VM call to swap two process slots and implement live update.
- The call is used by RS at update time and in turn invokes the kernel call
sys_update().

RS CHANGES:
- RS has been reworked with a better functional decomposition.
- Better kernel call masks. com.h now defines the set of very basic kernel calls
every system service is allowed to use. This makes system.conf simpler and
easier to maintain. In addition, this guarantees a higher level of isolation
for system libraries that use one or more kernel calls internally (e.g. printf).
- RS is the default signal manager for system processes. By default, RS
intercepts every signal delivered to every system process. This makes crash
recovery possible before bringing PM and friends in the loop.
- RS now supports fast rollback when something goes wrong while initializing
the new version during a live update.
- Live update is now implemented by keeping the two versions side-by-side and
swapping the process slots when the old version is ready to update.
- Crash recovery is now implemented by keeping the two versions side-by-side
and cleaning up the old version only when the recovery process is complete.

DS CHANGES:
- Fixed a bug when the process doing ds_publish() or ds_delete() is not known
by DS.
- Fixed the completely broken support for strings. String publishing is now
implemented in the system library and simply wraps publishing of memory ranges.
Ideally, we should adopt a similar approach for other data types as well.
- Test suite fixed.

DRIVER CHANGES:
- The hello driver has been added to the Minix distribution to demonstrate basic
live update and crash recovery functionalities.
- Other drivers have been adapted to conform the new SEF interface.
2010-03-17 01:15:29 +00:00

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#!/bin/sh
#
# MAKEDEV 3.3 - Make special devices. Author: Kees J. Bot
case $1 in
-n) e=echo; shift ;; # Just echo when -n is given.
*) e=
esac
case $#:$1 in
1:std) # Standard devices.
set -$- mem fd0 fd1 fd0p0 fd1p0 \
c0d0 c0d0p0 c0d0p0s0 c0d1 c0d1p0 c0d1p0s0 \
c0d2 c0d2p0 c0d2p0s0 c0d3 c0d3p0 c0d3p0s0 \
c0d4 c0d4p0 c0d4p0s0 c0d5 c0d5p0 c0d5p0s0 \
c0d6 c0d6p0 c0d6p0s0 c0d7 c0d7p0 c0d7p0s0 \
c1d0 c1d0p0 c1d0p0s0 c1d1 c1d1p0 c1d1p0s0 \
c1d2 c1d2p0 c1d2p0s0 c1d3 c1d3p0 c1d3p0s0 \
c1d4 c1d4p0 c1d4p0s0 c1d5 c1d5p0 c1d5p0s0 \
c1d6 c1d6p0 c1d6p0s0 c1d7 c1d7p0 c1d7p0s0 \
tty ttyc1 ttyc2 ttyc3 tty00 tty01 tty02 tty03 \
ttyp0 ttyp1 ttyp2 ttyp3 ttyp4 ttyp5 ttyp6 ttyp7 ttyp8 ttyp9 \
ttypa ttypb ttypc ttypd ttype ttypf \
ttyq0 ttyq1 ttyq2 ttyq3 ttyq4 ttyq5 ttyq6 ttyq7 ttyq8 ttyq9 \
ttyqa ttyqb ttyqc ttyqd ttyqe ttyqf \
eth klog random filter hello
;;
0:|1:-\?)
cat >&2 <<EOF
Usage: $0 [-n] key ...
Where key is one of the following:
ram mem kmem null boot zero # One of these makes all these memory devices
fd0 fd1 ... # Floppy devices for drive 0, 1, ...
fd0p0 fd1p0 ... # Make floppy partitions fd0p[0-3], fd1p[0-3], ...
c0d0 c0d1 ... # Make disks c0d0, c0d1, ...
c0d0p0 c0d1p0 ... # Make partitions c0d0p[0-3], c0d1p[0-3], ...
c0d0p0s0 c0d1p0s0 ... # Subparts c0d0p[0-3]s[0-3], c0d1p[0-3]s[0-3], ...
c1d0(p0)(s0) # Likewise for controller 1
c0t0 c0t1 c1t0 ... # Make tape devices c0t0, c0t0n, c0t1, ...
console lp tty log # One of these makes all four
ttyc1 ... ttyc7 # Virtual consoles
tty00 ... tty03 # Make serial lines
ttyp0 ... ttyq0 ... # Make tty, pty pairs
eth ip tcp udp # One of these makes some TCP/IP devices
audio mixer # Make audio devices
klog # Make /dev/klog
random # Make /dev/random, /dev/urandom
kbd # Make /dev/kbd
kbdaux # Make /dev/kbdaux
filter # Make /dev/filter
hello # Make /dev/hello
video # Make /dev/video
std # All standard devices
EOF
exit 1
esac
umask 077
ex=0
for dev
do
case $dev in # One of the controllers? Precompute major device nr.
c0*) maj=3 ;;
c1*) maj=8 ;;
c2*) maj=10 ;;
c3*) maj=12 ;;
esac
case $dev in
ram|mem|kmem|null|boot|zero|imgrd)
# Memory devices.
#
$e mknod ram b 1 0; $e chmod 600 ram
$e mknod mem c 1 1; $e chmod 640 mem
$e mknod kmem c 1 2; $e chmod 640 kmem
$e mknod null c 1 3; $e chmod 666 null
$e mknod boot b 1 4; $e chmod 600 ram
$e mknod zero c 1 5; $e chmod 644 zero
$e mknod imgrd b 1 6; $e chmod 644 zero
for n in 0 1 2 3 4 5
do $e mknod ram$n b 1 $((7+$n)); $e chmod 600 ram$n
done
$e chgrp kmem ram* mem kmem null boot zero imgrd
;;
fd[0-3])
# Floppy disk drive n.
#
d=`expr $dev : '.*\\(.\\)'` # Drive number.
$e mknod $dev b 2 $d
$e chmod 666 $dev
;;
pc[0-3]|at[0-3]|qd[0-3]|ps[0-3]|pat[0-3]|qh[0-3]|PS[0-3])
# Obsolete density locked floppy disk drive n.
#
d=`expr $dev : '.*\\(.\\)'` # Drive number.
m=$d # Minor device number.
$e mknod pc$d b 2 $m; m=`expr $m + 4`
$e mknod at$d b 2 $m; m=`expr $m + 4`
$e mknod qd$d b 2 $m; m=`expr $m + 4`
$e mknod ps$d b 2 $m; m=`expr $m + 4`
$e mknod pat$d b 2 $m; m=`expr $m + 4`
$e mknod qh$d b 2 $m; m=`expr $m + 4`
$e mknod PS$d b 2 $m; m=`expr $m + 4`
$e chmod 666 pc$d at$d qd$d ps$d pat$d qh$d PS$d
;;
fd[0-3]p[0-3])
# Floppy disk partitions.
#
n=`expr $dev : '\\(.*\\)..'` # Name prefix.
d=`expr $dev : '..\\(.\\)'` # Drive number.
m=`expr 112 + $d` # Minor of partition 0.
alldev=
for p in 0 1 2 3
do
m=`expr 112 + $d + $p '*' 4` # Minor of partition $p.
$e mknod ${n}p${p} b 2 $m # Make e.g. fd0p0 - fd0p3
alldev="$alldev ${n}p${p}"
done
$e chmod 666 $alldev
;;
c[0-3]d[0-7])
# Whole disk devices.
d=`expr $dev : '...\\(.\\)'` # Disk number.
m=`expr $d '*' 5` # Minor device number.
$e mknod $dev b $maj $m
$e chmod 600 $dev
;;
c[0-3]d[0-7]p[0-3])
# Disk primary partitions.
n=`expr $dev : '\\(.*\\).'` # Name prefix.
d=`expr $dev : '...\\(.\\)'` # Disk number.
alldev=
for p in 0 1 2 3
do
m=`expr $d '*' 5 + 1 + $p` # Minor device number.
$e mknod $n$p b $maj $m
alldev="$alldev $n$p"
done
echo $alldev | xargs $e chmod 600
;;
c[0-3]d[0-7]p[0-3]s[0-3])
# Disk subpartition.
n=`expr $dev : '\\(.*\\)...'` # Name prefix.
d=`expr $dev : '...\\(.\\)'` # Disk number.
alldev=
for p in 0 1 2 3
do
for s in 0 1 2 3
do
m=`expr 128 + $d '*' 16 + $p '*' 4 + $s` # Minor device nr.
$e mknod ${n}${p}s${s} b $maj $m
alldev="$alldev ${n}${p}s${s}"
done
done
echo $alldev | xargs $e chmod 600
;;
c[0-3]t[0-7]|c[0-3]t[0-7]n)
# Tape devices.
n=`expr $dev : '\\(....\\)'` # Name prefix.
t=`expr $dev : '...\\(.\\)'` # Tape number.
m=`expr 64 + $t '*' 2` # Minor device number.
$e mknod ${n}n c $maj $m
$e mknod ${n} c $maj `expr $m + 1`
$e chmod 660 ${n}n ${n}
;;
console|lp|tty|log|kbd|kbdaux|video)
# Console, line printer, anonymous tty, diagnostics device,
# raw keyboard, ps/2 mouse, video.
$e mknod console c 4 0
$e chmod 600 console
$e chgrp tty console
$e mknod tty c 5 0
$e chmod 666 tty
$e mknod lp c 6 0
$e chown daemon lp
$e chgrp daemon lp
$e chmod 200 lp
$e mknod log c 4 15
$e chmod 222 log
$e mknod kbd c 4 127
$e mknod kbdaux c 4 126
$e chmod 660 kbd kbdaux
$e chgrp operator kbd kbdaux
$e mknod video c 4 125
$e chmod 600 video
$e chgrp operator video
;;
ttyc[1-7])
# Virtual consoles.
#
m=`expr $dev : '....\\(.*\\)'` # Minor device number.
$e mknod $dev c 4 $m
$e chgrp tty $dev
$e chmod 600 $dev
;;
tty0[0-3])
# Serial lines.
#
n=`expr $dev : '.*\\(.\\)'`
$e mknod $dev c 4 `expr $n + 16`
$e chmod 666 $dev
$e chgrp tty $dev
;;
tty[p-s][0-9a-f]|pty[p-s][0-9a-f])
# Pseudo ttys.
#
dev=`expr $dev : '...\\(..\\)'`
g=`expr $dev : '\\(.\\)'` # Which group.
g=`echo $g | tr 'pqrs' '0123'`
n=`expr $dev : '.\\(.\\)'` # Which pty in the group.
case $n in
[a-f]) n=1`/bin/echo $n | tr 'abcdef' '012345'`
esac
$e mknod tty$dev c 4 `expr $g '*' 16 + $n + 128`
$e mknod pty$dev c 4 `expr $g '*' 16 + $n + 192`
$e chgrp tty tty$dev pty$dev
$e chmod 666 tty$dev pty$dev
;;
eth|ip|tcp|udp|eth0|ip0|tcp0|udp0)
# TCP/IP devices.
#
$e mknod eth0 c 7 0 # Network 0 (Ethernet)
$e mknod ip0 c 7 1
$e mknod tcp0 c 7 2
$e mknod udp0 c 7 3
$e chmod 600 eth0 ip0
$e chmod 666 tcp0 udp0
$e ln -f eth0 eth # Default interface
$e ln -f ip0 ip
$e ln -f tcp0 tcp
$e ln -f udp0 udp
;;
audio|mixer)
# Audio devices.
#
$e mknod audio c 13 0
$e mknod mixer c 13 1
$e chmod 666 audio mixer
;;
random|urandom)
# random data generator.
$e mknod random c 16 0; $e chmod 644 random
$e mknod urandom c 16 0; $e chmod 644 urandom
$e chgrp operator random urandom
;;
klog)
# logging device.
$e mknod klog c 15 0
$e chmod 600 klog
;;
filter)
# filter driver
$e mknod filter b 11 0
$e chmod 644 filter
;;
hello)
# hello driver
$e mknod hello c 17 0
$e chmod 644 hello
;;
*)
echo "$0: don't know about $dev" >&2
ex=1
esac
done
exit $ex
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