Codice

184 volume VI os16
Script e sorgenti del kernel 185
30265 | #
30266 | true
30267 | else
30268 | #
30269 | # File oggetto differente da ‘...crt0.s’.
30270 | #
30271 | EXEC=‘echo "$o" | sed "s/\.o$//"‘
30272 | BASENAME=‘basename $o .o‘
30273 | if [ -e "applic/$BASENAME.crt0.o" ]
30274 | then
30275 | #
30276 | # Qui c’è un file ‘...crt0.o’ specifico.
30277 | #
30278 | ld86 -i -d -s -o $EXEC \
30279 | applic/$BASENAME.crt0.o $o $OBJLIB
30280 | else
30281 | #
30282 | # Qui si usa il file ‘crt0.o’ generale.
30283 | #
30284 | ld86 -i -d -s -o $EXEC applic/crt0.o $o $OBJLIB
30285 | fi
30286 | #
30287 | if [ -x "applic/$BASENAME" ]
30288 | then
30289 | if mount | grep /mnt/os16.a > /dev/null
30290 | then
30291 | mkdir /mnt/os16.a/bin/ 2> /dev/null
30292 | cp -f "$EXEC" /mnt/os16.a/bin
30293 | else
30294 | echo "[$0] Cannot copy the application "
30295 | echo "[$0] $BASENAME inside the floppy "
30296 | echo "[$0] disk image!"
30297 | break
30298 | fi
30299 | fi
30300 | fi
30301 | done
30302 | sync
30303 | #
30304 | # Collegamento delle applicazioni più semplici,
30305 | # provenienti da altri sistemi operativi.
30306 | #
30307 | for o in ‘find ported/mix -name \*.o -print‘
30308 | do
30309 | if [ "$o" = "ported/mix/crt0.o" ] \
30310 | || [ ! -e "$o" ] \
30311 | || echo "$o" | grep ".crt0.o$" > /dev/null
30312 | then
30313 | #
30314 | # Il file non esiste oppure si tratta di ‘...crt0.s’.
30315 | #
30316 | true
30317 | else
30318 | #
30319 | # File oggetto differente da ‘...crt0.s’.
30320 | #
30321 | EXEC=‘echo "$o" | sed "s/\.o$//"‘
30322 | BASENAME=‘basename $o .o‘
30323 | if [ -e "ported/mix/$BASENAME.crt0.o" ]
30324 | then
30325 | #
30326 | # Qui c’è un file ‘...crt0.o’ specifico.
30327 | #
30328 | ld86 -i -d -s -o $EXEC \
30329 | applic/$BASENAME.crt0.o $o $OBJLIB
30330 | else
30331 | #
30332 | # Qui si usa il file ‘crt0.o’ generale.
30333 | #
30334 | ld86 -i -d -s -o $EXEC applic/crt0.o $o $OBJLIB
30335 | fi
30336 | #
30337 | if [ -x "$EXEC" ]
30338 | then
30339 | if mount | grep /mnt/os16.a > /dev/null
30340 | then
30341 | mkdir /mnt/os16.b/bin/ 2> /dev/null
30342 | cp -f "$EXEC" /mnt/os16.b/bin
30343 | else
30344 | echo "[$0] Cannot copy the application "
30345 | echo "[$0] $EXEC inside the floppy "
30346 | echo "[$0] disk image!"
30347 | break
30348 | fi
30349 | fi
30350 | fi
30351 | done
30352 | sync
30353 | #
30354 | # Altre applicazioni più importanti.
30355 | #
30356 | for d in ported/*
30357 | do
30358 | if [ -d "$d" ]
30359 | then
30360 | #
30361 | #
30362 | #
30363 | OBJECTS=""
30364 | BASENAME=‘basename $d‘
30365 | EXEC="$d/$BASENAME"
30366 | #
30367 | #
30368 | #
30369 | if [ "$BASENAME" = "mix" ]
30370 | then
30371 | #
30372 | # già fatto.
30373 | #
30374 | continue
30375 | fi
30376 | #
30377 | #
30378 | #
30379 | for o in $d/*.o
30380 | do
30381 | if [ "$o" = "$d/crt0.o" ] \
30382 | || [ ! -e "$o" ]
30383 | then
30384 | true
30385 | else
30386 | OBJECTS="$OBJECTS $o"
30387 | fi
30388 | done
30389 | #
30390 | ld86 -i -d -s -o $EXEC $d/crt0.o $OBJECTS $OBJLIB
30391 | #
30392 | if [ -x "$d/$BASENAME" ]
30393 | then
30394 | if mount | grep /mnt/os16.b > /dev/null
30395 | then
30396 | mkdir /mnt/os16.b/bin/ 2> /dev/null
30397 | cp -f "$EXEC" /mnt/os16.b/bin
30398 | else
30399 | echo "[$0] Cannot copy the application "
30400 | echo "[$0] $BASENAME inside the floppy "
30401 | echo "[$0] disk image!"
30402 | break
30403 | fi
30404 | fi
30405 | fi
30406 | done
30407 | sync
30408 |
30409 | fi
30410 |}
30411 |#
30412 |# Start.
30413 |#
30414 |if [ -d kernel ] && \
30415 | [ -d applic ] && \
30416 | [ -d lib ]
30417 |then
30418 | OS16PATH=‘pwd‘
30419 | main
30420 |else
30421 | echo "[$0] Running from a wrong directory!"
30422 |fi
104.2 os16: «kernel/devices.h»
Si veda la sezione 103.1.
40001 |#ifndef _KERNEL_DEVICES_H
40002 |#define _KERNEL_DEVICES_H 1
40003 |
40004 |#include
40005 |#include
40006 |//----------------------------------------------------------------------
40007 |#define DEV_READ 0
40008 |#define DEV_WRITE 1
40009 |ssize_t dev_io (pid_t pid, dev_t device, int rw, off_t offset,
40010 | void *buffer, size_t size, int *eof);
40011 |//----------------------------------------------------------------------
40012 |// The following functions are used only by ‘dev_io()’.
40013 |//----------------------------------------------------------------------
40014 |ssize_t dev_mem (pid_t pid, dev_t device, int rw, off_t offset,
40015 | void *buffer, size_t size, int *eof);
40016 |ssize_t dev_tty (pid_t pid, dev_t device, int rw, off_t offset,
40017 | void *buffer, size_t size, int *eof);
40018 |ssize_t dev_dsk (pid_t pid, dev_t device, int rw, off_t offset,
40019 | void *buffer, size_t size, int *eof);
40020 |ssize_t dev_kmem (pid_t pid, dev_t device, int rw, off_t offset,
40021 | void *buffer, size_t size, int *eof);
40022 |//----------------------------------------------------------------------
40023 |
40024 |#endif
104.2.1 kernel/devices/dev_dsk.c
Si veda la sezione 103.1.2.
50001 |#include
50002 |#include
50003 |#include
50004 |#include
50005 |#include
50006 |#include
50007 |#include
50008 |#include
50009 |#include
50010 |#include
50011 |#include
50012 |#include
50013 |//----------------------------------------------------------------------
50014 |ssize_t
50015 |dev_dsk (pid_t pid, dev_t device, int rw, off_t offset, void *buffer,
50016 | size_t size, int *eof)
50017 |{
50018 | ssize_t n;
50019 | int dev_minor = minor (device);
50020 |
50021 | if (rw == DEV_READ)
50022 | {
50023 | n = dsk_read_bytes (dev_minor, offset, buffer, size);
50024 | }
50025 | else
50026 | {
50027 | n = dsk_write_bytes (dev_minor, offset, buffer, size);
50028 | }
50029 | return (n);
50030 |}
«
«