* Copyright (c) 1990 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* %sccs.include.redist.c%
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)rec_open.c 5.10 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
__rec_open(fname
, flags
, mode
, openinfo
)
const RECNOINFO
*openinfo
;
/* Open the user's file -- if this fails, we're done. */
if (fname
!= NULL
&& (rfd
= open(fname
, flags
, mode
)) < 0)
/* Create a btree in memory (backed by disk). */
if (openinfo
->flags
& ~(R_FIXEDLEN
| R_NOKEY
| R_SNAPSHOT
))
btopeninfo
.cachesize
= openinfo
->cachesize
;
btopeninfo
.compare
= NULL
;
btopeninfo
.lorder
= openinfo
->lorder
;
dbp
= __bt_open(NULL
, O_RDWR
, S_IRUSR
| S_IWUSR
, &btopeninfo
);
dbp
= __bt_open(NULL
, O_RDWR
, S_IRUSR
| S_IWUSR
, NULL
);
* Some fields in the tree structure are recno specific. Fill them
* in and make the btree structure look like a recno structure. We
* don't change the bt_ovflsize value, it's close enough and slightly
if (openinfo
->flags
& R_FIXEDLEN
) {
t
->bt_reclen
= openinfo
->reclen
;
t
->bt_bval
= openinfo
->bval
;
* In 4.4BSD stat(2) returns true for ISSOCK on pipes. Until
* then, this is fairly close. Pipes are read-only.
if (lseek(rfd
, (off_t
)0, SEEK_CUR
) == -1 && errno
== ESPIPE
) {
if ((t
->bt_rfp
= fdopen(rfd
, "r")) == NULL
)
ISSET(t
, BTF_FIXEDLEN
) ? __rec_fpipe
: __rec_vpipe
;
switch(flags
& O_ACCMODE
) {
if (sb
.st_size
> SIZE_T_MAX
) {
if ((t
->bt_smap
= mmap(NULL
, (size_t)sb
.st_size
,
PROT_READ
, 0, rfd
, (off_t
)0)) == (caddr_t
)-1)
t
->bt_emap
= t
->bt_smap
+ sb
.st_size
;
ISSET(t
, BTF_FIXEDLEN
) ? __rec_fmap
: __rec_vmap
;
/* Use the recno routines. */
dbp
->close
= __rec_close
;
/* If the root page was created, reset the flags. */
if ((h
= mpool_get(t
->bt_mp
, P_ROOT
, 0)) == NULL
)
if ((h
->flags
& P_TYPE
) == P_BLEAF
) {
h
->flags
= h
->flags
& ~P_TYPE
| P_RLEAF
;
mpool_put(t
->bt_mp
, h
, MPOOL_DIRTY
);
mpool_put(t
->bt_mp
, h
, 0);
if (openinfo
&& openinfo
->flags
& R_SNAPSHOT
&&
t
->bt_irec(t
, MAX_REC_NUMBER
) == RET_ERROR
)