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Copyright 1991 David Jurgens |
INT 21,5F AL=00 Get Redirection Mode (DOS 3.1+)
AH = 5F
AL = 00
BL = redirection type
= 03 printer
= 04 disk drive
on return:
AX = error code if CF is set
BH = device redirection state
= 00 redirection off
= 01 redirection on
- determines if disk or printer redirection is enabled
- fails if file sharing is not loaded
INT 21,5F AL=01 Set Redirection Mode (DOS 3.1+)
AH = 5F
AL = 01
BH = device redirection state
= 00 turn redirection off
= 01 turn redirection on
BL = redirection type
= 03 printer
= 04 disk drive
on return:
AX = error code if CF is set
- enables or disables disk or printer redirection
- local devices are used when redirection is off
- fails if file sharing is not loaded
INT 21,5F AL=02 Get Redirection List Entry (DOS 3.1+)
AH = 5F
AL = 02
BX = redirection list index
DS:SI = far pointer to a 16 byte buffer to hold device name
ES:DI = far pointer to a 128 byte buffer to hold network name
on return:
AX = error code if CF is set
= 1 invalid function code
= 12 no more files
BH = device status flag,
bit 0 = 0 device valid
bit 0 = 1 device invalid
BL = device type
= 3 printer
= 4 drive
CX = stored parameter value
DS:SI = far pointer to ASCIIZ local device name
ES:DI = far pointer to ASCIIZ network name
- value returned in CX is the value previously passed to
INT 21,5F with subfunction 3 in register CX
- registers DX and BP are destroyed
- fails if file sharing is not loaded
INT 21,5F AL=03 Redirect Device (DOS 3.1+)
AH = 5F
AL = 03
BL = device type
= 3 if printer
= 4 if drive
CX = parameter to save for caller
DS:SI = far pointer to ASCIIZ local device name
ES:DI = far pointer to ASCIIZ network name followed
by ASCIIZ password
on return
AX = error code if CF is set
= 1 invalid function code or
invalid source or destination string format or
source device already redirected
= 3 path not found
= 5 access denied
= 8 insufficient memory
- parameter passed in CX can later be retrieved by calls
to INT 21,5F subfunction 2
- local device name in DS:SI can be a drive designator
(D:), a printer name (PRN or LPTx), or a null string
- when a null string is followed by a password is used, DOS
tries granting access to the network directory using the
given password
- fails if file sharing is not loaded
INT 21,5F AL=04 Cancel Device Redirection (DOS 3.1+)
AH = 5F
AL = 04
DS:SI = far pointer to ASCIIZ local device name
on return
AX = error code if CF set
= 01 function code invalid
ASCIIZ string is not an existing source device
= 0F redirection paused on server
- local device name in DS:SI can be a drive designator
(D:), a printer name (PRN or LPTx), or a string beginning
with 2 backslashes "\\"
- when two backslashes are used for the string the connection
between the local machine and network directory terminates
- fails if file sharing is not loaded
INT 21,5F AL=05 Get Redirection List Extended Entry (DOS 4.0+)
AH = 5F
AL = 05
BX = redirection list index
DS:SI = pointer to buffer to receive ASCIIZ source device name
ES:DI = pointer to buffer to receive ASCIIZ network path
on return
AX = error code if CF set
BH = device status flag (bit 0 clear if valid)
BL = device type
= 03 printer device
= 04 disk device
CX = stored user parameter value
BP = NETBIOS local session number
DS:SI = pointer to buffer containing ASCIIZ source device name
ES:DI = pointer to buffer containing ASCIIZ network path
- retrieves the status, type, source and target of a given redirection
- fails if file sharing is not loaded
INT 21,5F AL=06 Get Redirection List (DOS 4.0+)
AH = 5F
AL = 06
- no information is currently available for this subfunction
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| Esc or Alt-X to exit |
int 21,5f |
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