From FreeBSD's mkdosfs:
- KNF - cleaned up a few typos. - use the msdosfs header files. - separated Makefile and Makefile.boot, since we cannot build bootcode.h (yet) ToDo: - Make it work on hard disks; only works on floppies - Make it accept an msdos.sys io.sys and a command.com, to make a real dos bootable disk.
This commit is contained in:
christos
parent
edc5dadbab
commit
d5fff03ed1
9
sbin/newfs_msdos/Makefile
Normal file
9
sbin/newfs_msdos/Makefile
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@ -0,0 +1,9 @@
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# $NetBSD: Makefile,v 1.1 1997/03/01 19:42:54 christos Exp $
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# Id: Makefile,v 1.3 1997/02/22 16:06:35 peter Exp
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#
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PROG=newfs_msdos
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MAN=newfs_msdos.8
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CFLAGS+= -I${.CURDIR}/../../sys/msdosfs -Wall -Wno-unused
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.include <bsd.prog.mk>
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53
sbin/newfs_msdos/Makefile.boot
Normal file
53
sbin/newfs_msdos/Makefile.boot
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@ -0,0 +1,53 @@
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###################################################################
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#
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# Everything below is solely intented for maintenance.
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# As you can see, it requires as86/ld86 from the ``bcc'' package.
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#
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# For this reason, the bootcode.h target puts the result into
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# ${.CURDIR}
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AS86= as86
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LD86= ld86
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AS86FLAGS= -0
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LD86FLAGS= -0 -s
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CLEANFILES+= *.obj *.bin *.com
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.SUFFIXES: .asm .obj .bin .com
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.asm.obj:
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${AS86} ${AS86FLAGS} -o ${.TARGET} ${.IMPSRC}
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.obj.bin:
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${LD86} ${LD86FLAGS} -T 0x7c00 -o ${.PREFIX}.tmp ${.IMPSRC}
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dd bs=32 skip=1 of=${.TARGET} if=${.PREFIX}.tmp
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rm -f ${.PREFIX}.tmp
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# .com file is just for testing
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.obj.com:
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${LD86} ${LD86FLAGS} -T 0x100 -o ${.PREFIX}.tmp ${.IMPSRC}
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dd bs=32 skip=1 of=${.TARGET} if=${.PREFIX}.tmp
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rm -f ${.PREFIX}.tmp
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## Do NOT depend this on bootcode.bin unless you've installed the
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## bcc package!
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bootcode.h: ## bootcode.bin
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@echo converting bootcode.bin into bootcode.h...
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@perl -e 'if(read(STDIN,$$buf,512)<512) { \
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die "Read error on .bin file\n"; \
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} \
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@arr = unpack("C*",$$buf); \
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print "#ifndef BOOTCODE_H\n"; \
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print "#define BOOTCODE_H 1\n\n"; \
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print "/*\n * This file has been generated\n"; \
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print " * automatically. Do not edit.\n */\n\n"; \
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print "static unsigned char bootcode[512] = {\n"; \
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for($$i=0; $$i<512; $$i++) { \
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printf "0x%02x, ",$$arr[$$i]; \
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if($$i % 12 == 11) {print "\n";} \
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} \
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print "};\n\n"; \
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print "#endif /* BOOTCODE_H */\n";' \
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< bootcode.bin > ${.CURDIR}/bootcode.h
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.include <bsd.prog.mk>
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103
sbin/newfs_msdos/bootcode.asm
Normal file
103
sbin/newfs_msdos/bootcode.asm
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@ -0,0 +1,103 @@
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;;; $NetBSD: bootcode.asm,v 1.1 1997/03/01 19:42:56 christos Exp $
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;;; Hello emacs, this looks like -*- asm -*- code, doesn't it?
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;;;
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;;; This forms a simple dummy boot program for use with a tool to
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;;; format DOS floppies. All it does is displaying a message, and
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;;; recover gracefully by re-initializing the CPU.
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;;;
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;;; Written by Joerg Wunsch, Dresden. Placed in the public domain.
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;;; This software is provided as is, neither kind of warranty applies.
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;;; Use at your own risk.
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;;;
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;;; (This is written in as86 syntax. as86 is part of Bruce Evans'
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;;; bcc package.)
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;;;
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;;; Id: bootcode.asm,v 1.3 1997/02/22 16:06:36 peter Exp
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;;;
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;;; This code must be linked to address 0x7c00 in order to function
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;;; correctly (the BIOS boot address).
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;;;
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;;; It's 16-bit code, and we don't care for a data segment.
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use16
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.text
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entry _begin
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_begin: jmp init ; jump to boot prog
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nop ; historical baggage ;-)
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;;;
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;;; Reserve space for the "BIOS parameter block".
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;;; This will be overwritten by the actual formatting routine.
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;;;
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bpb: .ascii "BSD 4.4" ; "OEM" name
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.word 512 ; sector size
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.byte 2 ; cluster size
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.word 1 ; reserved sectors (just the boot sector)
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.byte 2 ; FAT count
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.word 112 ; # of entries in root dir
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.word 1440 ; total number of sectors, MSDOS 3.3 or below
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.byte 0xf9 ; "media descriptor"
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.word 3 ; FAT size (sectors)
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.word 9 ; sectors per track
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.word 2 ; heads per cylinder
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.word 0 ; hidden sectors
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;; MSDOS 4.0++ -- only valid iff total number of sectors == 0
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.word 0 ; unused
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.long 0 ; total number of sectors
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.short 0 ; physical drive (0, 1, ..., 0x80) %-)
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.byte 0 ; "extented boot signature"
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.long 0 ; volume serial number (i.e., garbage :)
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.ascii " " ; label -- same as vol label in root dir
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.ascii "FAT12 " ; file system ID
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;;;
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;;; Executable code starts here.
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;;;
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init:
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;; First, display our message.
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mov si, *message
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lp1: seg cs
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movb al, [si]
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inc si
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testb al, al
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jz lp2 ; null-terminated string
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movb bl, *7 ; display with regular attribute
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movb ah, *0x0e ; int 0x10, fnc 0x0e -- emulate tty
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int 0x10
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jmp lp1
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lp2: xorb ah, ah ; int 0x16, fnc 0x00 -- wait for keystroke
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int 0x16
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mov ax, *0x40 ; write 0x1234 to address 0x472 --
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push ax ; tell the BIOS that this is a warm boot
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pop dx
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mov 0x72, *0x1234
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jmpf 0xfff0,0xf000 ; jump to CPU initialization code
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message:
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.byte 7
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.byte 0xc9
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xbb, 13, 10, 0xba
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.ascii " Sorry, this disc does actually not contain "
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.byte 0xba, 13, 10, 0xba
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.ascii " a bootable system. "
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.byte 0xba, 13, 10, 0xba
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.ascii " Press any key to reboot. "
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.byte 0xba, 13, 10, 0xc8
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xcd,0xcd,0xcd,0xcd,0xcd,0xcd
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.byte 0xbc, 13,10
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.byte 0
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;; Adjust the value below after changing the length of
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;; the code above!
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.space 0x1fe-0x161 ; pad to 512 bytes
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.byte 0x55, 0xaa ; yes, we are bootable (cheating :)
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end
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54
sbin/newfs_msdos/bootcode.h
Normal file
54
sbin/newfs_msdos/bootcode.h
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@ -0,0 +1,54 @@
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#ifndef BOOTCODE_H
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#define BOOTCODE_H 1
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/*
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* This file has been generated
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* automatically. Do not edit.
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*/
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static unsigned char bootcode[512] = {
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0xeb, 0x3c, 0x90, 0x42, 0x53, 0x44, 0x20, 0x20, 0x34, 0x2e, 0x34, 0x00,
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0x02, 0x02, 0x01, 0x00, 0x02, 0x70, 0x00, 0xa0, 0x05, 0xf9, 0x03, 0x00,
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0x09, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x46, 0x41, 0x54, 0x31, 0x32, 0x20,
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0x20, 0x20, 0xbe, 0x65, 0x7c, 0x2e, 0x8a, 0x04, 0x46, 0x84, 0xc0, 0x74,
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0x08, 0xb3, 0x07, 0xb4, 0x0e, 0xcd, 0x10, 0xeb, 0xf0, 0x30, 0xe4, 0xcd,
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0x16, 0xb8, 0x40, 0x00, 0x50, 0x5a, 0xc7, 0x06, 0x72, 0x00, 0x34, 0x12,
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0xea, 0xf0, 0xff, 0x00, 0xf0, 0x07, 0xc9, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xbb, 0x0d, 0x0a, 0xba, 0x20, 0x20, 0x53,
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0x6f, 0x72, 0x72, 0x79, 0x2c, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x64,
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0x69, 0x73, 0x63, 0x20, 0x64, 0x6f, 0x65, 0x73, 0x20, 0x61, 0x63, 0x74,
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0x75, 0x61, 0x6c, 0x6c, 0x79, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x63, 0x6f,
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0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x20, 0xba, 0x0d, 0x0a, 0xba, 0x20,
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0x20, 0x61, 0x20, 0x62, 0x6f, 0x6f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20,
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0x73, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x2e, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xba, 0x0d, 0x0a,
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0xba, 0x20, 0x20, 0x50, 0x72, 0x65, 0x73, 0x73, 0x20, 0x61, 0x6e, 0x79,
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0x20, 0x6b, 0x65, 0x79, 0x20, 0x74, 0x6f, 0x20, 0x72, 0x65, 0x62, 0x6f,
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0x6f, 0x74, 0x2e, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xba,
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0x0d, 0x0a, 0xc8, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
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0xcd, 0xbc, 0x0d, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa, };
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#endif /* BOOTCODE_H */
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137
sbin/newfs_msdos/newfs_msdos.8
Normal file
137
sbin/newfs_msdos/newfs_msdos.8
Normal file
@ -0,0 +1,137 @@
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.\" $NetBSD: newfs_msdos.8,v 1.1 1997/03/01 19:42:57 christos Exp $
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.\"
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.\" Copyright (c) 1997 Christos Zoulas
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.\" Copyright (c) 1995, 1996 Joerg Wunsch
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.\"
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.\" All rights reserved.
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||||
.\"
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.\" This program is free software.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
||||
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
.\"
|
||||
.\" Id: mkdosfs.1,v 1.5 1997/02/22 16:06:38 peter Exp
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||||
.\"
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.Dd February 25, 1997
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.Os
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.Dt NEWFS_MSDOS 8
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.Sh NAME
|
||||
.Nm newfs_msdos
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.Nd create an MS-DOS (FAT) file system
|
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.Sh SYNOPSIS
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||||
.Nm
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||||
.Bq Fl f Ar capacity
|
||||
.Bq Fl L Ar vollabel
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||||
.Ar device
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||||
.Sh DESCRIPTION
|
||||
.Nm
|
||||
establishes a file system structure on
|
||||
.Ar device
|
||||
that is understood by
|
||||
.Xr mount_msdos
|
||||
and some ancient program loader.
|
||||
.Ar Device
|
||||
will typically be the character device node for a floppy disk drive,
|
||||
.Pq e.\ g. Pa /dev/rfd0 ,
|
||||
although any existing writable file or device is acceptable. In case
|
||||
of a regular file it is treated as a dumped image of an MS-DOS file
|
||||
system; only the file system structure will be written to it, and it
|
||||
won't be truncated.
|
||||
.Pp
|
||||
The options are as follows:
|
||||
.Bl -tag -width 10n -offset indent
|
||||
.It Fl f Ar capacity
|
||||
Use defaults for a typical file system with
|
||||
.Ar capacity
|
||||
kilobytes. Currently, the values 360, 720, 1200, and 1440 are
|
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recognized.
|
||||
.Pp
|
||||
If this option is not specified,
|
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.Nm
|
||||
attempts to determine the size of the
|
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.Ar device .
|
||||
This is not reliably possible in all cases, but is believed to work
|
||||
for the more common situations.
|
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.It Fl L Ar vollabel
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||||
Use
|
||||
.Ar vollabel
|
||||
to describe the file system, instead of the default
|
||||
.Ql 4.4BSD .
|
||||
.El
|
||||
.Pp
|
||||
The file system structure consists of three major areas:
|
||||
.Bl -tag -width 10n -offset indent
|
||||
.It Em The bootsector
|
||||
This is the very first (512-byte) sector. It contains executable
|
||||
code that normally would bootstrap an operating system when loaded.
|
||||
Since it's beyond the scope of
|
||||
.Nm
|
||||
to install an operating system on the medium, this boot code will only
|
||||
print a message that the disk does not contain a bootable system.
|
||||
Inside the
|
||||
.Em bootsector
|
||||
is the
|
||||
.Em BIOS parameter block (BPB) ,
|
||||
where several statistical parameters of the file system are being
|
||||
held.
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||||
.It Em The file allocation table(s) (FAT)
|
||||
Sectors next to the
|
||||
.Em bootsector
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||||
hold the FAT, which is used to register file system allocation,
|
||||
as well as keeping pointer chains for the chunks constituting
|
||||
one file. There are usually two identical copies of the FAT.
|
||||
.It Em The root directory
|
||||
The final structure is the root directory for this medium. It is
|
||||
merely a space reservation, padded with 0's, and unfortunately fixed
|
||||
in its size.
|
||||
.Nm
|
||||
initializes it to empty, and enters a volume label record into the
|
||||
very first directory slot.
|
||||
.Sh DIAGNOSTICS
|
||||
An exit status of 0 is returned upon successful operation. Exit status
|
||||
1 is returned on any errors during file system creation, and an exit status
|
||||
of 2 reflects invalid arguments given to the program (along with an
|
||||
appropriate information written to diagnostic output).
|
||||
.Sh SEE ALSO
|
||||
.Xr fdformat 1 ,
|
||||
.Xr mount_msdos 8 ,
|
||||
.Xr newfs 8 .
|
||||
.Sh BUGS
|
||||
There is currently no way to specify obscure file system parameters.
|
||||
Thus, only media with one of the supported capacity values can be
|
||||
formatted. For the same reason, it's not possible to handle hard disk
|
||||
partitions. More options should be added to allow this. More entries
|
||||
should be added to the table of known formats, too.
|
||||
.Pp
|
||||
No attempt is made to handle media defects. However, this is beyond
|
||||
the scope of
|
||||
.Nm
|
||||
and should better be handled by the (nonexistent)
|
||||
.Xr dosfsck 1
|
||||
utility.
|
||||
.Sh HISTORY
|
||||
.Nm
|
||||
appeared in FreeBSD-2.2.
|
||||
.\" .Fx 2.2 .
|
||||
.Sh AUTHOR
|
||||
The program has been contributed by
|
||||
.if n Joerg Wunsch,
|
||||
.if t J\(:org Wunsch,
|
||||
Dresden.
|
||||
338
sbin/newfs_msdos/newfs_msdos.c
Normal file
338
sbin/newfs_msdos/newfs_msdos.c
Normal file
@ -0,0 +1,338 @@
|
||||
/* $NetBSD: newfs_msdos.c,v 1.1 1997/03/01 19:42:57 christos Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1997 Christos Zoulas
|
||||
* Copyright (c) 1995, 1996 Joerg Wunsch
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
* This program is free software.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Create an MS-DOS (FAT) file system.
|
||||
*
|
||||
* Id: mkdosfs.c,v 1.4 1997/02/22 16:06:38 peter Exp
|
||||
*/
|
||||
#ifndef lint
|
||||
static char rcsid[] = "$NetBSD: newfs_msdos.c,v 1.1 1997/03/01 19:42:57 christos Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/param.h>
|
||||
#include <sys/stat.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <time.h>
|
||||
#include <unistd.h>
|
||||
#include <memory.h>
|
||||
#include <err.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <assert.h>
|
||||
|
||||
/* From msdosfs */
|
||||
#include <direntry.h>
|
||||
#include <bpb.h>
|
||||
#include <bootsect.h>
|
||||
|
||||
#include "bootcode.h"
|
||||
|
||||
struct descrip {
|
||||
/* our database key */
|
||||
unsigned kilobytes;
|
||||
/* MSDOS 3.3 BPB fields */
|
||||
u_short sectsiz;
|
||||
u_char clustsiz;
|
||||
u_short ressecs;
|
||||
u_char fatcnt;
|
||||
u_short rootsiz;
|
||||
u_short totsecs;
|
||||
u_char media;
|
||||
u_short fatsize;
|
||||
u_short trksecs;
|
||||
u_short headcnt;
|
||||
u_short hidnsec;
|
||||
/* MSDOS 4 BPB extensions */
|
||||
u_long ext_totsecs;
|
||||
u_short ext_physdrv;
|
||||
u_char ext_extboot;
|
||||
char ext_label[11];
|
||||
char ext_fsysid[8];
|
||||
};
|
||||
|
||||
static struct descrip table[] = {
|
||||
/* NB: must be sorted, starting with the largest format! */
|
||||
/*
|
||||
* KB sec cls res fat rot tot med fsz spt hds hid
|
||||
* tot phs ebt label fsysid
|
||||
*/
|
||||
{ 1440, 512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, 0,
|
||||
0, 0, 0, "4.4BSD ", "FAT12 " },
|
||||
{ 1200, 512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, 0,
|
||||
0, 0, 0, "4.4BSD ", "FAT12 " },
|
||||
{ 720, 512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, 0,
|
||||
0, 0, 0, "4.4BSD ", "FAT12 " },
|
||||
{ 360, 512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, 0,
|
||||
0, 0, 0, "4.4BSD ", "FAT12 " },
|
||||
{ 0, 0, 0, 0, 0, 0, 0, 0x00, 0, 0, 0, 0,
|
||||
0, 0, 0, " ", " " }
|
||||
};
|
||||
|
||||
struct fat {
|
||||
u_int8_t media; /* the media descriptor again */
|
||||
u_int8_t padded; /* always 0xff */
|
||||
u_int8_t contents[1]; /* the `1' is a placeholder only */
|
||||
};
|
||||
|
||||
|
||||
int main __P((int, char *[]));
|
||||
|
||||
static void usage __P((void));
|
||||
static size_t findformat __P((int));
|
||||
static void setup_boot_sector_from_template __P((union bootsector *,
|
||||
struct descrip *));
|
||||
|
||||
|
||||
static void
|
||||
usage()
|
||||
{
|
||||
extern char *__progname;
|
||||
|
||||
(void) fprintf(stderr,
|
||||
"Usage: %s [-f <kbytes>] [-L <label>] <device>\n", __progname);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Try to deduce a format appropriate for our disk.
|
||||
* This is a bit tricky. If the argument is a regular file, we can
|
||||
* lseek() to its end and get the size reported. If it's a device
|
||||
* however, lseeking doesn't report us any useful number. Instead,
|
||||
* we try to seek just to the end of the device and try reading a
|
||||
* block there. In the case where we've hit exactly the device
|
||||
* boundary, we get a zero read, and thus have found the size.
|
||||
* Since our knowledge of distinct formats is limited anyway, this
|
||||
* is not a big deal at all.
|
||||
*/
|
||||
static size_t
|
||||
findformat(fd)
|
||||
int fd;
|
||||
{
|
||||
struct stat sb;
|
||||
off_t offs;
|
||||
|
||||
|
||||
if (fstat(fd, &sb) == -1)
|
||||
err(1, "Cannot fstat disk"); /* Cannot happen */
|
||||
|
||||
if (S_ISREG(sb.st_mode)) {
|
||||
if (lseek(fd, (off_t) 0, SEEK_END) == -1 ||
|
||||
(offs = lseek(fd, (off_t) 0, SEEK_CUR)) == -1)
|
||||
/* Hmm, hmm. Hard luck. */
|
||||
return 0;
|
||||
return (size_t) (offs / 1024);
|
||||
} else if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
|
||||
char b[512];
|
||||
int rv;
|
||||
struct descrip *dp;
|
||||
|
||||
for (dp = table; dp->kilobytes != 0; dp++) {
|
||||
offs = dp->kilobytes * 1024;
|
||||
|
||||
if (lseek(fd, offs, SEEK_SET) == -1)
|
||||
/* Uh-oh, lseek() is not supposed to fail. */
|
||||
return 0;
|
||||
|
||||
if ((rv = read(fd, b, 512)) == 0)
|
||||
break;
|
||||
/*
|
||||
* XXX The ENOSPC is for the bogus fd(4) driver
|
||||
* return value.
|
||||
*/
|
||||
if (rv == -1 && errno != EINVAL && errno != ENOSPC)
|
||||
return 0;
|
||||
/* else: continue */
|
||||
}
|
||||
(void) lseek(fd, (off_t) 0, SEEK_SET);
|
||||
return dp->kilobytes;
|
||||
} else
|
||||
/* Outta luck. */
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
setup_boot_sector_from_template(bs, dp)
|
||||
union bootsector *bs;
|
||||
struct descrip *dp;
|
||||
{
|
||||
struct byte_bpb50 bpb;
|
||||
|
||||
assert(sizeof(bs->bs50) == 512);
|
||||
assert(sizeof(bootcode) == 512);
|
||||
|
||||
(void) memcpy(&bs->bs50, bootcode, 512);
|
||||
|
||||
putushort(bpb.bpbBytesPerSec, dp->sectsiz);
|
||||
bpb.bpbSecPerClust = dp->clustsiz;
|
||||
putushort(bpb.bpbResSectors, dp->ressecs);
|
||||
bpb.bpbFATs = dp->fatcnt;
|
||||
putushort(bpb.bpbRootDirEnts, dp->rootsiz);
|
||||
putushort(bpb.bpbSectors, dp->totsecs);
|
||||
bpb.bpbMedia = dp->media;
|
||||
putushort(bpb.bpbFATsecs, dp->fatsize);
|
||||
putushort(bpb.bpbSecPerTrack, dp->trksecs);
|
||||
putushort(bpb.bpbHeads, dp->headcnt);
|
||||
putulong(bpb.bpbHiddenSecs, dp->hidnsec);
|
||||
putulong(bpb.bpbHugeSectors, dp->ext_totsecs);
|
||||
|
||||
bs->bs50.bsDriveNumber = dp->ext_physdrv;
|
||||
bs->bs50.bsBootSignature = dp->ext_extboot;
|
||||
|
||||
/* assign a "serial number" :) */
|
||||
srandom((unsigned) time((time_t) 0));
|
||||
putulong(bs->bs50.bsVolumeID, random());
|
||||
|
||||
(void) memcpy(bs->bs50.bsVolumeLabel, dp->ext_label,
|
||||
MIN(sizeof(dp->ext_label), sizeof(bs->bs50.bsVolumeLabel)));
|
||||
(void) memcpy(bs->bs50.bsFileSysType, dp->ext_fsysid,
|
||||
MIN(sizeof(dp->ext_fsysid), sizeof(bs->bs50.bsFileSysType)));
|
||||
(void) memcpy(bs->bs50.bsBPB, &bpb,
|
||||
MIN(sizeof(bpb), sizeof(bs->bs50.bsBPB)));
|
||||
}
|
||||
|
||||
int
|
||||
main(argc, argv)
|
||||
int argc;
|
||||
char *argv[];
|
||||
{
|
||||
union bootsector bs;
|
||||
struct descrip *dp;
|
||||
struct fat *fat;
|
||||
struct direntry *rootdir;
|
||||
struct tm *tp;
|
||||
time_t now;
|
||||
int c, i, fd, format = 0, rootdirsize, fatsz;
|
||||
const char *label = 0;
|
||||
|
||||
while ((c = getopt(argc, argv, "f:L:")) != -1)
|
||||
switch (c) {
|
||||
case 'f':
|
||||
format = atoi(optarg);
|
||||
break;
|
||||
|
||||
case 'L':
|
||||
label = optarg;
|
||||
break;
|
||||
|
||||
case '?':
|
||||
default:
|
||||
usage();
|
||||
}
|
||||
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
|
||||
if (argc != 1)
|
||||
usage();
|
||||
|
||||
if ((fd = open(argv[0], O_RDWR | O_EXCL, 0)) == -1)
|
||||
err(1, "Cannot open `%s'", argv[0]);
|
||||
|
||||
/* If no format specified, try to figure it out. */
|
||||
if (format == 0 && (format = findformat(fd)) == 0)
|
||||
errx(1, "Cannot determine size, must use -f format");
|
||||
|
||||
for (dp = table; dp->kilobytes != 0; dp++)
|
||||
if (dp->kilobytes == format)
|
||||
break;
|
||||
|
||||
if (dp->kilobytes == 0)
|
||||
errx(1, "Cannot find format description for %d KB", format);
|
||||
|
||||
/* prepare and write the boot sector */
|
||||
setup_boot_sector_from_template(&bs, dp);
|
||||
|
||||
/* if we've got an explicit label, use it */
|
||||
if (label)
|
||||
(void) strncpy(bs.bs50.bsVolumeLabel, label, 11);
|
||||
|
||||
if (write(fd, &bs, sizeof bs) != sizeof bs)
|
||||
err(1, "Writing boot sector");
|
||||
|
||||
/* now, go on with the FATs */
|
||||
if ((fat = (struct fat *) malloc(dp->sectsiz * dp->fatsize)) == NULL)
|
||||
err(1, "Out of memory (FAT table)");
|
||||
|
||||
(void) memset(fat, 0, dp->sectsiz * dp->fatsize);
|
||||
|
||||
fat->media = dp->media;
|
||||
fat->padded = 0xff;
|
||||
fat->contents[0] = 0xff;
|
||||
if (dp->totsecs > 20740 ||
|
||||
(dp->totsecs == 0 && dp->ext_totsecs > 20740))
|
||||
/* 16-bit FAT */
|
||||
fat->contents[1] = 0xff;
|
||||
|
||||
fatsz = dp->sectsiz * dp->fatsize;
|
||||
for (i = 0; i < dp->fatcnt; i++)
|
||||
if (write(fd, fat, fatsz) != fatsz)
|
||||
err(1, "Writing FAT %d", i);
|
||||
|
||||
free(fat);
|
||||
|
||||
/* finally, build the root dir */
|
||||
rootdirsize = dp->rootsiz * sizeof(struct direntry);
|
||||
rootdirsize = roundup(rootdirsize, dp->clustsiz * dp->sectsiz);
|
||||
|
||||
if ((rootdir = (struct direntry *) malloc(rootdirsize)) == NULL)
|
||||
err(1, "Out of memory (root directory)");
|
||||
|
||||
(void) memset(rootdir, 0, rootdirsize);
|
||||
|
||||
/* set up a volume label inside the root dir :) */
|
||||
if (label)
|
||||
(void) strncpy(rootdir->deName, label, 11);
|
||||
else
|
||||
(void) memcpy(rootdir->deName, dp->ext_label, 11);
|
||||
|
||||
rootdir->deAttributes = ATTR_VOLUME;
|
||||
now = time((time_t) 0);
|
||||
tp = localtime(&now);
|
||||
rootdir->deCTime[0] = tp->tm_sec / 2;
|
||||
rootdir->deCTime[0] |= (tp->tm_min & 7) << 5;
|
||||
rootdir->deCTime[1] = ((tp->tm_min >> 3) & 7);
|
||||
rootdir->deCTime[1] |= tp->tm_hour << 3;
|
||||
rootdir->deCDate[0] = tp->tm_mday;
|
||||
rootdir->deCDate[0] |= ((tp->tm_mon + 1) & 7) << 5;
|
||||
rootdir->deCDate[1] = ((tp->tm_mon + 1) >> 3) & 1;
|
||||
rootdir->deCDate[1] |= (tp->tm_year - 80) << 1;
|
||||
|
||||
if (write(fd, rootdir, rootdirsize) != rootdirsize)
|
||||
err(1, "Writing root directory");
|
||||
|
||||
(void) close(fd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user