Int 21H, AH=5AH

3 and higher

CREATE TEMPORARY FILE

AH = 5Ah
CX = file attribute (see #01420 at AX=4301h)
DS:DX -> ASCIZ path ending with a '\' + 13 zero bytes to receive the
	generated filename

CF clear if successful
    AX = file handle opened for read/write in compatibility mode
    DS:DX pathname extended with generated name for temporary file
CF set on error
    AX = error code (03h,04h,05h) (see #01680)

under the FlashTek X-32 DOS extender, the path pointer is in DS:EDX

MS-DOS 3.0-4.0 and DR DOS 3.4-5.0 generate the filename as a sequence of hex digits based on the current date and time; MS-DOS 6+, DR DOS 6, and Novell DOS 7 use letters A-P in place of hex digits

MS-DOS 5.0 and DR DOS 3.41/5.0 will insert a missing trailing backslash before appending the generated filename, but due to this, an empty string results in a file in the root directory

BUGS: COMPAQ DOS 3.31 hangs if the pathname is at XXXXh:0000h; it apparently wraps around to the end of the segment

MS-DOS 5.00 revisions A and B and PC-DOS 5.00 revision A reportedly hang the system if the specified path is the root directory and the root directory is full (no free directory entries)

Mark Incley mincley@krisalis.demon.co.uk reports that this function hangs in MS-DOS 6.2x if the name includes two consecutive path separators (e.g. C:\\)

AH=3Ch,AH=5Bh

Text based on Ralf Brown Interrupt List Release 61