Date: Thu, 1 Apr 93 20:02:20 EST
From: peprbv AT cfa0 DOT harvard DOT edu (Bob Babcock)
To: Shawn_McHorse AT fcircus DOT sat DOT tx DOT us
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: popen, pclose, and perror

>I have another program which uses the following constants:
>     _MAX_PATH
>     _MAX_DRIVE
>     _MAX_DIR
>     _MAX_FNAME
>     _MAX_EXT
>I looked through every C reference I have, and could find nothing about
>these things.  I believe that they are MS-DOS specific, but I have not

These are the maximum number of characters, including null terminator, for
a filename with path, drive, etc.  Values from Borland C 3.0 are:
#define MAXPATH   80
#define MAXDRIVE  3
#define MAXDIR    66
#define MAXFILE   9
#define MAXEXT    5

(Your names are slightly different because they are the Microsoft equivalents.
Borland defines their constants in DIR.H, and also defines MSC's in STDLIB.H)