[9fans] dirread() and dirreadall()

[Ronald G Minnich <rminnich@lanl.gov>]

As I read the man page for dirread(), it kind of implies that it returns 
an array of entries, and also implies that it returns one dir entry at a 
time.

"It [dirread] reads from fd and unpacks the data into an
    array of Dir structures whose address is returned in *buf (see stat(3)
    for the layout of a Dir)."


but


" by   contrast, dirread steps through a directory one read(3) at a time."

Anyways, FWIW, dirread reads in as much as it can, up to a limit of 
DIRMAX bytes, and fails if it can not allocate that much; and dirreadall 
reads in as much as it can, up to a limit of allocatable memory, and 
fails if it can not allocate that much.

For dirreadone(), I think, ya rolls yer own.

apologies if the error here is my inability to parse english.

ron