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/*
* Copyright ( c ) 1992 , 1993 , 1996
* Berkeley Software Design , Inc . All rights reserved .
*
* 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 .
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement :
* This product includes software developed by Berkeley Software
* Design , Inc .
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design , Inc . ` ` 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 Berkeley Software Design , Inc . 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 .
*
* BSDI dos . h , v 2.2 1996 / 04 / 08 19 : 32 : 28 bostic Exp
*
1999-08-28 01:08:13 +00:00
* $ FreeBSD $
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*/
/*
* DOS Error codes
*/
/* MS-DOS version 2 error codes */
# define FUNC_NUM_IVALID 0x01
# define FILE_NOT_FOUND 0x02
# define PATH_NOT_FOUND 0x03
# define TOO_MANY_OPEN_FILES 0x04
# define ACCESS_DENIED 0x05
# define HANDLE_INVALID 0x06
# define MEM_CB_DEST 0x07
# define INSUF_MEM 0x08
# define MEM_BLK_ADDR_IVALID 0x09
# define ENV_INVALID 0x0a
# define FORMAT_INVALID 0x0b
# define ACCESS_CODE_INVALID 0x0c
# define DATA_INVALID 0x0d
# define UNKNOWN_UNIT 0x0e
# define DISK_DRIVE_INVALID 0x0f
# define ATT_REM_CUR_DIR 0x10
# define NOT_SAME_DEV 0x11
# define NO_MORE_FILES 0x12
/* mappings to critical-error codes */
# define WRITE_PROT_DISK 0x13
# define UNKNOWN_UNIT_CERR 0x14
# define DRIVE_NOT_READY 0x15
# define UNKNOWN_COMMAND 0x16
# define DATA_ERROR_CRC 0x17
# define BAD_REQ_STRUCT_LEN 0x18
# define SEEK_ERROR 0x19
# define UNKNOWN_MEDIA_TYPE 0x1a
# define SECTOR_NOT_FOUND 0x1b
# define PRINTER_OUT_OF_PAPER 0x1c
# define WRITE_FAULT 0x1d
# define READ_FAULT 0x1e
# define GENERAL_FAILURE 0x1f
/* MS-DOS version 3 and later extended error codes */
# define SHARING_VIOLATION 0x20
# define FILE_LOCK_VIOLATION 0x21
# define DISK_CHANGE_INVALID 0x22
# define FCB_UNAVAILABLE 0x23
# define SHARING_BUF_EXCEEDED 0x24
# define NETWORK_NAME_NOT_FOUND 0x35
# define FILE_ALREADY_EXISTS 0x50
# define DUPLICATE_REDIR 0x55
/*
* dos attribute byte flags
*/
# define REGULAR_FILE 0x00
# define READ_ONLY_FILE 0x01
# define HIDDEN_FILE 0x02
# define SYSTEM_FILE 0x04
# define VOLUME_LABEL 0x08
# define DIRECTORY 0x10
# define ARCHIVE_NEEDED 0x20
/*
* Internal structure used for get_space ( )
*/
typedef struct {
long bytes_sector ;
long sectors_cluster ;
long total_clusters ;
long avail_clusters ;
} fsstat_t ;
/*
* Several DOS structures used by the file redirector
*/
typedef struct {
DIR * dp ;
u_char * searchend ;
u_char searchdir [ 1024 ] ;
} search_t ;
/*
* This is really the format of the DTA . The file redirector will only
* use the first 21 bytes .
*/
typedef struct {
u_char drive __attribute__ ( ( packed ) ) ;
u_char pattern [ 11 ] __attribute__ ( ( packed ) ) ;
u_char flag __attribute__ ( ( packed ) ) ;
u_char reserved1 [ 4 ] __attribute__ ( ( packed ) ) ;
search_t * searchptr __attribute__ ( ( packed ) ) ;
u_char attr __attribute__ ( ( packed ) ) ;
u_short time __attribute__ ( ( packed ) ) ;
u_short date __attribute__ ( ( packed ) ) ;
u_long size __attribute__ ( ( packed ) ) ;
u_char name [ 13 ] __attribute__ ( ( packed ) ) ;
} /* __attribute__((__packed__))*/ find_block_t ;
/*
* DOS directory entry structure
*/
typedef struct {
u_char name [ 8 ] __attribute__ ( ( packed ) ) ;
u_char ext [ 3 ] __attribute__ ( ( packed ) ) ;
u_char attr __attribute__ ( ( packed ) ) ;
u_char reserved [ 10 ] __attribute__ ( ( packed ) ) ;
u_short time __attribute__ ( ( packed ) ) ;
u_short date __attribute__ ( ( packed ) ) ;
u_short start __attribute__ ( ( packed ) ) ;
u_long size __attribute__ ( ( packed ) ) ;
} dosdir_t ;
/*
* The Current Drive Structure
*/
typedef struct {
u_char path [ 0x43 ] __attribute__ ( ( packed ) ) ;
u_short flag __attribute__ ( ( packed ) ) ;
u_short dpb_off __attribute__ ( ( packed ) ) ;
u_short dpb_seg __attribute__ ( ( packed ) ) ;
u_short redirector_off __attribute__ ( ( packed ) ) ;
u_short redirector_seg __attribute__ ( ( packed ) ) ;
u_char paramter_int21 [ 2 ] __attribute__ ( ( packed ) ) ;
u_short offset __attribute__ ( ( packed ) ) ;
u_char dummy __attribute__ ( ( packed ) ) ;
u_char ifs_driver [ 4 ] __attribute__ ( ( packed ) ) ;
u_char dummy2 [ 2 ] __attribute__ ( ( packed ) ) ;
} /* __attribute__((__packed__))*/ CDS ;
# define CDS_remote 0x8000
# define CDS_ready 0x4000
# define CDS_joined 0x2000
# define CDS_substed 0x1000
# define CDS_notnet 0x0080
/*
* The List of Lists ( used to get the CDS and a few other numbers )
*/
typedef struct {
u_char dummy1 [ 0x16 ] __attribute__ ( ( packed ) ) ;
u_short cds_offset __attribute__ ( ( packed ) ) ;
u_short cds_seg __attribute__ ( ( packed ) ) ;
u_char dummy2 [ 6 ] __attribute__ ( ( packed ) ) ;
u_char numberbdev __attribute__ ( ( packed ) ) ;
u_char lastdrive __attribute__ ( ( packed ) ) ;
} LOL ;
/*
* The System File Table
*/
typedef struct {
/*00*/ u_short nfiles __attribute__ ( ( packed ) ) ; /* Number file handles referring to this file */
/*02*/ u_short open_mode __attribute__ ( ( packed ) ) ; /* Open mode (bit 15 -> by FCB) */
/*04*/ u_char attribute __attribute__ ( ( packed ) ) ;
/*05*/ u_short info __attribute__ ( ( packed ) ) ; /* 15 -> remote, 14 -> dont set date */
/*07*/ u_char ddr_dpb [ 4 ] __attribute__ ( ( packed ) ) ; /* Device Driver Header/Drive Paramter Block */
/*0b*/ u_short fd __attribute__ ( ( packed ) ) ;
/*0d*/ u_short time __attribute__ ( ( packed ) ) ;
/*0f*/ u_short date __attribute__ ( ( packed ) ) ;
/*11*/ u_long size __attribute__ ( ( packed ) ) ;
/*15*/ u_long offset __attribute__ ( ( packed ) ) ;
/*19*/ u_short rel_cluster __attribute__ ( ( packed ) ) ;
/*1b*/ u_short abs_cluster __attribute__ ( ( packed ) ) ;
/*1d*/ u_char dir_sector [ 2 ] __attribute__ ( ( packed ) ) ;
/*1f*/ u_char dir_entry __attribute__ ( ( packed ) ) ;
/*20*/ u_char name [ 8 ] __attribute__ ( ( packed ) ) ;
/*28*/ u_char ext [ 3 ] __attribute__ ( ( packed ) ) ;
/*2b*/ u_char sharesft [ 4 ] __attribute__ ( ( packed ) ) ;
/*2f*/ u_char sharenet [ 2 ] __attribute__ ( ( packed ) ) ;
/*31*/ u_short psp __attribute__ ( ( packed ) ) ;
/*33*/ u_char share_off [ 2 ] __attribute__ ( ( packed ) ) ;
/*35*/ u_char local_end [ 2 ] __attribute__ ( ( packed ) ) ;
/*37*/ u_char ifd_driver [ 4 ] __attribute__ ( ( packed ) ) ;
} /*__attribute__((__packed__))*/ SFT ;
/*
* Format of PCDOS 4.01 swappable data area
* ( Sorry , but you need a wide screen to make this look nice )
*/
typedef struct {
u_char err_crit __attribute__ ( ( packed ) ) ; /* 00h BYTE critical error flag */
u_char InDOS __attribute__ ( ( packed ) ) ; /* 01h BYTE InDOS flag (count of active INT 21 calls) */
u_char err_drive __attribute__ ( ( packed ) ) ; /* 02h BYTE ??? drive number or FFh */
u_char err_locus __attribute__ ( ( packed ) ) ; /* 03h BYTE locus of last error */
u_short err_code __attribute__ ( ( packed ) ) ; /* 04h WORD extended error code of last error */
u_char err_suggest __attribute__ ( ( packed ) ) ; /* 06h BYTE suggested action for last error */
u_char err_class __attribute__ ( ( packed ) ) ; /* 07h BYTE class of last error */
u_short err_di __attribute__ ( ( packed ) ) ;
u_short err_es __attribute__ ( ( packed ) ) ; /* 08h DWORD ES:DI pointer for last error */
u_short dta_off __attribute__ ( ( packed ) ) ;
u_short dta_seg __attribute__ ( ( packed ) ) ; /* 0Ch DWORD current DTA */
u_short psp __attribute__ ( ( packed ) ) ; /* 10h WORD current PSP */
u_short int_23_sp __attribute__ ( ( packed ) ) ; /* 12h WORD stores SP across an INT 23 */
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u_short wait_status __attribute__ ( ( packed ) ) ; /* 14h WORD return code from last process termination (set to 0 after reading with AH=4Dh) */
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u_char current_drive __attribute__ ( ( packed ) ) ; /* 16h BYTE current drive */
u_char break_flag __attribute__ ( ( packed ) ) ; /* 17h BYTE extended break flag */
u_char unknown1 [ 2 ] __attribute__ ( ( packed ) ) ; /* 18h 2 BYTEs ??? */
u_short int_21_ax __attribute__ ( ( packed ) ) ; /* 1Ah WORD value of AX on call to INT 21 */
u_short net_psp __attribute__ ( ( packed ) ) ; /* 1Ch WORD PSP segment for sharing/network */
u_short net_number __attribute__ ( ( packed ) ) ; /* 1Eh WORD network machine number for sharing/network (0000h = us) */
u_short first_mem __attribute__ ( ( packed ) ) ; /* 20h WORD first usable memory block found when allocating memory */
u_short best_mem __attribute__ ( ( packed ) ) ; /* 22h WORD best usable memory block found when allocating memory */
u_short last_mem __attribute__ ( ( packed ) ) ; /* 24h WORD last usable memory block found when allocating memory */
u_char unknown [ 10 ] __attribute__ ( ( packed ) ) ; /* 26h 2 BYTEs ??? (don't seem to be referenced) */
u_char monthday __attribute__ ( ( packed ) ) ; /* 30h BYTE day of month */
u_char month __attribute__ ( ( packed ) ) ; /* 31h BYTE month */
u_short year __attribute__ ( ( packed ) ) ; /* 32h WORD year - 1980 */
u_short days __attribute__ ( ( packed ) ) ; /* 34h WORD number of days since 1-1-1980 */
u_char weekday __attribute__ ( ( packed ) ) ; /* 36h BYTE day of week (0 = Sunday) */
u_char unknown2 [ 3 ] __attribute__ ( ( packed ) ) ; /* 37h BYTE ??? */
u_char ddr_head [ 30 ] __attribute__ ( ( packed ) ) ; /* 38h 30 BYTEs device driver request header */
u_short ddre_ip __attribute__ ( ( packed ) ) ;
u_short ddre_cs __attribute__ ( ( packed ) ) ; /* 58h DWORD pointer to device driver entry point (used in calling driver) */
u_char ddr_head2 [ 22 ] __attribute__ ( ( packed ) ) ; /* 5Ch 22 BYTEs device driver request header */
u_char ddr_head3 [ 30 ] __attribute__ ( ( packed ) ) ; /* 72h 30 BYTEs device driver request header */
u_char unknown3 [ 6 ] __attribute__ ( ( packed ) ) ; /* 90h 6 BYTEs ??? */
u_char clock_xfer [ 6 ] __attribute__ ( ( packed ) ) ; /* 96h 6 BYTEs CLOCK$ transfer record (see AH=52h) */
u_char unknown4 [ 2 ] __attribute__ ( ( packed ) ) ; /* 9Ch 2 BYTEs ??? */
u_char filename1 [ 128 ] __attribute__ ( ( packed ) ) ; /* 9Eh 128 BYTEs buffer for filename */
u_char filename2 [ 128 ] __attribute__ ( ( packed ) ) ; /* 11Eh 128 BYTEs buffer for filename */
u_char findfirst [ 21 ] __attribute__ ( ( packed ) ) ; /* 19Eh 21 BYTEs findfirst/findnext search data block (see AH=4Eh) */
u_char foundentry [ 32 ] __attribute__ ( ( packed ) ) ; /* 1B3h 32 BYTEs directory entry for found file */
u_char cds [ 88 ] __attribute__ ( ( packed ) ) ; /* 1D3h 88 BYTEs copy of current directory structure for drive being accessed */
u_char fcbname [ 11 ] __attribute__ ( ( packed ) ) ; /* 22Bh 11 BYTEs ??? FCB-format filename */
u_char unknown5 __attribute__ ( ( packed ) ) ; /* 236h BYTE ??? */
u_char wildcard [ 11 ] __attribute__ ( ( packed ) ) ; /* 237h 11 BYTEs wildcard destination specification for rename (FCB format) */
u_char unknown6 [ 11 ] __attribute__ ( ( packed ) ) ; /* 242h 2 BYTEs ??? */
u_char attrmask __attribute__ ( ( packed ) ) ; /* 24Dh BYTE attribute mask for directory search??? */
u_char open_mode __attribute__ ( ( packed ) ) ; /* 24Eh BYTE open mode */
u_char unknown7 [ 3 ] __attribute__ ( ( packed ) ) ; /* 24fh BYTE ??? */
u_char virtual_dos __attribute__ ( ( packed ) ) ; /* 252h BYTE flag indicating how DOS function was invoked (00h = direct INT 20/INT 21, FFh = server call AX=5D00h) */
u_char unknown8 [ 9 ] __attribute__ ( ( packed ) ) ; /* 253h BYTE ??? */
u_char term_type __attribute__ ( ( packed ) ) ; /* 25Ch BYTE type of process termination (00h-03h) */
u_char unknown9 [ 3 ] __attribute__ ( ( packed ) ) ; /* 25Dh BYTE ??? */
u_short dpb_off __attribute__ ( ( packed ) ) ;
u_short dpb_seg __attribute__ ( ( packed ) ) ; /* 260h DWORD pointer to Drive Parameter Block for critical error invocation */
u_short int21_sf_off __attribute__ ( ( packed ) ) ;
u_short int21_sf_seg __attribute__ ( ( packed ) ) ; /* 264h DWORD pointer to stack frame containing user registers on INT 21 */
u_short store_sp __attribute__ ( ( packed ) ) ; /* 268h WORD stores SP??? */
u_short dosdpb_off __attribute__ ( ( packed ) ) ;
u_short dosdpb_seg __attribute__ ( ( packed ) ) ; /* 26Ah DWORD pointer to DOS Drive Parameter Block for ??? */
u_short disk_buf_seg __attribute__ ( ( packed ) ) ; /* 26Eh WORD segment of disk buffer */
u_short unknown10 [ 4 ] __attribute__ ( ( packed ) ) ; /* 270h WORD ??? */
u_char media_id __attribute__ ( ( packed ) ) ; /* 278h BYTE Media ID byte returned by AH=1Bh,1Ch */
u_char unknown11 __attribute__ ( ( packed ) ) ; /* 279h BYTE ??? (doesn't seem to be referenced) */
u_short unknown12 [ 2 ] __attribute__ ( ( packed ) ) ; /* 27Ah DWORD pointer to ??? */
u_short sft_off __attribute__ ( ( packed ) ) ;
u_short sft_seg __attribute__ ( ( packed ) ) ; /* 27Eh DWORD pointer to current SFT */
u_short cds_off __attribute__ ( ( packed ) ) ;
u_short cds_seg __attribute__ ( ( packed ) ) ; /* 282h DWORD pointer to current directory structure for drive being accessed */
u_short fcb_off __attribute__ ( ( packed ) ) ;
u_short fcb_seg __attribute__ ( ( packed ) ) ; /* 286h DWORD pointer to caller's FCB */
u_short unknown13 [ 2 ] __attribute__ ( ( packed ) ) ; /* 28Ah WORD ??? */
u_short jft_off __attribute__ ( ( packed ) ) ;
u_short jft_seg __attribute__ ( ( packed ) ) ; /* 28Eh DWORD pointer to a JFT entry in process handle table (see AH=26h) */
u_short filename1_off __attribute__ ( ( packed ) ) ; /* 292h WORD offset in DOS CS of first filename argument */
u_short filename2_off __attribute__ ( ( packed ) ) ; /* 294h WORD offset in DOS CS of second filename argument */
u_short unknown14 [ 12 ] __attribute__ ( ( packed ) ) ; /* 296h WORD ??? */
u_short file_offset_lo __attribute__ ( ( packed ) ) ;
u_short file_offset_hi __attribute__ ( ( packed ) ) ; /* 2AEh DWORD offset in file??? */
u_short unknown15 __attribute__ ( ( packed ) ) ; /* 2B2h WORD ??? */
u_short partial_bytes __attribute__ ( ( packed ) ) ; /* 2B4h WORD bytes in partial sector */
u_short number_sectors __attribute__ ( ( packed ) ) ; /* 2B6h WORD number of sectors */
u_short unknown16 [ 3 ] __attribute__ ( ( packed ) ) ; /* 2B8h WORD ??? */
u_short nbytes_lo __attribute__ ( ( packed ) ) ;
u_short nbytes_hi __attribute__ ( ( packed ) ) ; /* 2BEh DWORD number of bytes appended to file */
u_short qpdb_off __attribute__ ( ( packed ) ) ;
u_short qpdb_seg __attribute__ ( ( packed ) ) ; /* 2C2h DWORD pointer to ??? disk buffer */
u_short asft_off __attribute__ ( ( packed ) ) ;
u_short asft_seg __attribute__ ( ( packed ) ) ; /* 2C6h DWORD pointer to ??? SFT */
u_short int21_bx __attribute__ ( ( packed ) ) ; /* 2CAh WORD used by INT 21 dispatcher to store caller's BX */
u_short int21_ds __attribute__ ( ( packed ) ) ; /* 2CCh WORD used by INT 21 dispatcher to store caller's DS */
u_short temporary __attribute__ ( ( packed ) ) ; /* 2CEh WORD temporary storage while saving/restoring caller's registers */
u_short prevcall_off __attribute__ ( ( packed ) ) ;
u_short prevcall_seg __attribute__ ( ( packed ) ) ; /* 2D0h DWORD pointer to prev call frame (offset 264h) if INT 21 reentered also switched to for duration of INT 24 */
u_char unknown17 [ 9 ] __attribute__ ( ( packed ) ) ; /* 2D4h WORD ??? */
u_short ext_action __attribute__ ( ( packed ) ) ; /* 2DDh WORD multipurpose open action */
u_short ext_attr __attribute__ ( ( packed ) ) ; /* 2DFh WORD multipurpose attribute */
u_short ext_mode __attribute__ ( ( packed ) ) ; /* 2E1h WORD multipurpose mode */
u_char unknown17a [ 9 ] __attribute__ ( ( packed ) ) ;
u_short lol_ds __attribute__ ( ( packed ) ) ; /* 2ECh WORD stores DS during call to [List-of-Lists + 37h] */
u_char unknown18 [ 5 ] __attribute__ ( ( packed ) ) ; /* 2EEh WORD ??? */
u_char usernameptr [ 4 ] __attribute__ ( ( packed ) ) ; /* 2F3h DWORD pointer to user-supplied filename */
u_char unknown19 [ 4 ] __attribute__ ( ( packed ) ) ; /* 2F7h DWORD pointer to ??? */
u_char lol_ss [ 2 ] __attribute__ ( ( packed ) ) ; /* 2FBh WORD stores SS during call to [List-of-Lists + 37h] */
u_char lol_sp [ 2 ] __attribute__ ( ( packed ) ) ; /* 2FDh WORD stores SP during call to [List-of-Lists + 37h] */
u_char lol_flag __attribute__ ( ( packed ) ) ; /* 2FFh BYTE flag, nonzero if stack switched in calling [List-of-Lists+37h] */
u_char searchdata [ 21 ] __attribute__ ( ( packed ) ) ; /* 300h 21 BYTEs FindFirst search data for source file(s) of a rename operation (see AH=4Eh) */
u_char renameentry [ 32 ] __attribute__ ( ( packed ) ) ; /* 315h 32 BYTEs directory entry for file being renamed */
u_char errstack [ 331 ] __attribute__ ( ( packed ) ) ; /* 335h 331 BYTEs critical error stack */
u_char diskstack [ 384 ] __attribute__ ( ( packed ) ) ; /* 480h 384 BYTEs disk stack (functions greater than 0Ch, INT 25, INT 26) */
u_char iostack [ 384 ] __attribute__ ( ( packed ) ) ; /* 600h 384 BYTEs character I/O stack (functions 01h through 0Ch) */
u_char int_21_08_flag __attribute__ ( ( packed ) ) ; /* 780h BYTE flag affecting AH=08h (see AH=64h) */
u_char unknown20 [ 11 ] __attribute__ ( ( packed ) ) ; /* 781h BYTE ??? looks like a drive number */
} /*__attribute__((__packed__))*/ SDA ;
struct exehdr {
u_short magic ;
u_short bytes_on_last_page ;
u_short size ; /* 512 byte blocks */
u_short nreloc ;
u_short hdr_size ; /* paragraphs */
u_short min_memory ; /* paragraphs */
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u_short max_memory ; /* paragraphs */
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u_short init_ss ;
u_short init_sp ;
u_short checksum ;
u_short init_ip ;
u_short init_cs ;
u_short reloc_offset ;
u_short overlay_num ;
} ;
struct reloc_entry {
u_short off ;
u_short seg ;
} ;
/*
* * DOS - related shrapnel
*/
static inline int
from_dos_attr ( int attr )
{
return ( ( attr & READ_ONLY_FILE ) ? 0444 : 0666 ) ;
}
static inline int
to_dos_attr ( int mode )
{
int attr ;
attr = ( mode & 0200 ) ? 0 : READ_ONLY_FILE ;
attr | = S_ISDIR ( mode ) ? DIRECTORY : 0 ;
return ( attr ) ;
}
/* prototypes */
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extern const char * dos_return [ ] ; /* names of DOS return codes */
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extern const int dos_ret_size ; /* length of above */
extern char * InDOS ;
extern int diskdrive ; /* current drive */
unsigned long disk_transfer_addr ;
extern void encode_dos_file_time ( time_t , u_short * , u_short * ) ;
extern time_t decode_dos_file_time ( u_short dosdate , u_short dostime ) ;
extern int translate_filename ( u_char * dname , u_char * uname , int * drivep ) ;
extern int parse_filename ( int flag , char * str , char * fcb , int * nb ) ;
extern void dos_init ( void ) ;
/* from exe.c */
extern int pspseg ; /* segment # of PSP */
extern int curpsp ;
extern void exec_command ( regcontext_t * REGS , int run , int fd , char * cmdname , u_short * param ) ;
extern void load_overlay ( int fd , int start_segment , int reloc_segment ) ;
extern void load_command ( regcontext_t * REGS , int run , int fd , char * cmdname ,
u_short * param , char * * argv , char * * envs ) ;
extern void exec_return ( regcontext_t * REGS , int code ) ;
extern int get_env ( void ) ;