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SIO-Command-$F6-Read-Directory

This is a command for Device $70 - The FujiNet Device itself (see SIO-Commands-for-Device-ID-$70).

Read Directory ($F6)

Description

Retrieve the next directory entry text and place into buffer.

AUX1 specifies a maximum length to retrieve. If the directory entry path is longer than this, it will be truncated to fit this value (along with a terminating NULL character). This is useful for making read commands more efficient for display, and using a subsequent Directory Open/Directory Read to get the full 256 character filename for mounting.

AUX2 indicates whether to return additional file details along with the entry text. Setting bit 7 (0x80) will return 10 additional bytes (see RETURNS section below for details) followed by the directory entry text. The max directory entry text length returned will be reduced by 10 bytes to accommodate the additional data.

Parameters

DCB	Value
DDEVIC	$70
DUNIT	$01
DCOMND	$F6
DSTATS	$40
DBUF	Buffer to contain the directory entry 0-255 bytes
DTIMLO	# of seconds before timeout
DBYT	# of bytes to return in directory entry
DAUX1	Maximum length of entry response
DAUX2	If bit 0x80 set, additional file details returned

Returns

NULL terminated string with directory entry.

First and second bytes are both set to 0x7F (0x7F7F) when the end of the directory has been reached.

If AUX2 bit 7 (0x80) is set on the request, the following data will be returned before the directory entry text:

Byte	Item	Description
0x00	MODIFIED_YEAR	File modified date-time: years since 1970
0x01	MODIFIED_MONTH	File modified date-time: month (1-12)
0x02	MODIFIED_DAY	File modified date-time: day of month (1-31)
0x03	MODIFIED_HOUR	File modified date-time: hour (0-23)
0x04	MODIFIED_MINUTE	File modified date-time: minute (0-59)
0x05	MODIFIED_SECOND	File modified date-time: second (0-59)
0x06	FILE_SIZE_LO	File size low byte
0x07	FILE_SIZE_HI	File size high byte
0x08	FILE_FLAGS	One or more file flag values (see below)
0x09	FILE_TYPE	One of the file type values (see below)

The file's modified date-time value will be adjusted to the local time zone (if any) set on FujiNet.

File Flag	Value	Description
FF_DIR	0x01	Entry is a directory
FF_TRUNC	0x02	Entry name was truncated to fit requested size

File Type	Value	Description
FT_UNKNOWN	0x00	File type could not be determined
FT_ATR	0x01	ATR disk image
FT_ATX	0x02	ATX disk image
FT_XEX	0x03	Atari executable

Examples

CC65

/**
   A directory entry, with stat() information
*/
union
{
  struct
  {
    unsigned short mode;
    unsigned long size;
    char filename[256];
  } entry;
  unsigned char rawData[262]; // max size.
} dirEntry;


// loop and read dir for display
while ((dirEntry.entry.filename[0]!=0x7F))
  {
    memset(dirEntry.rawData,0,sizeof(dirEntry.rawData);
    dirEntry.entry.filename[0]=0x7F;
    OS.dcb.ddevic=0x70;
    OS.dcb.dunit=1;
    OS.dcb.dcomnd=0xF6;
    OS.dcb.dstats=0x40;
    OS.dcb.dbuf=&path;
    OS.dcb.dtimlo=0x0F;
    OS.dcb.dbyt=36;
    OS.dcb.daux1=36;
    OS.dcb.daux2=hostSlot;
    siov();

    if (dirEntry.entry.filename[0]=='.')
      continue;
    else if (dirEntry.entry.filename[0]==0x7F)
      break;
    else
      {
        strcpy(files[num_entries],path);
        screen_puts(0,num_entries+2,path);
        num_entries++;
      }
  }