update the comment

first pass at making DB use basic integral types (the Alpha port)

lint

add DB_ flags to __rec_open
if DB_LOCK not set, pin page across calls and don't copy key/data pair

SunOS 4.1.3 and SVR4 require either MAP_PRIVATE or MAP_SHARED

4.4BSD snapshot (revision 8.1); add 1993 to copyright

give up on the EFBIG test

add __rec_fd, to return a file descriptor

pass psize down to the btree routines

underlying btree is always O_RDWR, recno may be O_RDONLY
break BTF flags up into btree/recno (B_, R_) categories

another shot at fixing the SIZE_T_MAX test

initialize uninitialized fields in btopeninfo. minor speedup, don't
check for cases which are the same as default:

guarantee that bt_rfd gets set; pipes are read-only (check for einval)
don't read the file if the size is 0; return the right errno
clean up mmap and file pointer uses in recno interface

cast the SIZE_T_MAX, so compilers don't get upset

move db.h to the end of the includes, make compat.h work better

read slowly if can't mmap the file

initialize cursor so that first R_CURSORLOG works

add in-memory versions of recno trees, lint fixes

only permit O_RDONLY or O_RDWR, not O_WRONLY

lseek takes an off_t, not a long

don't test rec_len field if flag bit not set

mmap returns -1 on error

use constant SIZE_T_MAX instead of knowing what size it is

second arg to mmap is a size_t, MAP_FILE disappears

make eof flag part of each BT struct; test for sb.st_size larger than
the maximum int; set bt_rfp to NULL if not set, used as a flag in close