/* {{{ rberkeley_db_set_alloc */
SEXP rberkeley_db_set_alloc (SEXP _dbp)
{
/* This function allows for memory
from the R process to used for DB
data. Not entirely sure of how to
do this yet, but this is a start... */
DB *dbp;
int ret;
dbp = R_ExternalPtrAddr(_dbp);
if(R_ExternalPtrTag(_dbp) != RBerkeley_DB || dbp == NULL)
error("invalid 'db' handle");
ret = dbp->set_alloc(dbp, malloc, realloc, free);
return ScalarInteger(ret);
}
static int db3open(rpmdb rpmdb, rpmTag rpmtag, dbiIndex * dbip)
{
extern const struct _dbiVec db3vec;
const char * root;
const char * home;
char * dbhome;
const char * dbfile;
const char * dbsubfile;
dbiIndex dbi = NULL;
int rc = 0;
int xx;
DB * db = NULL;
DB_ENV * dbenv = NULL;
DB_TXN * txnid = NULL;
uint32_t oflags;
int _printit;
if (dbip)
*dbip = NULL;
/*
* Parse db configuration parameters.
*/
if ((dbi = db3New(rpmdb, rpmtag)) == NULL)
return 1;
dbi->dbi_api = DB_VERSION_MAJOR;
/*
* Get the prefix/root component and directory path.
*/
root = (dbi->dbi_root ? dbi->dbi_root : rpmdb->db_root);
if ((root[0] == '/' && root[1] == '\0') || rpmdb->db_chrootDone)
root = NULL;
home = (dbi->dbi_home ? dbi->dbi_home : rpmdb->db_home);
dbhome = rpmGenPath(root, home, NULL);
if (dbi->dbi_temporary) {
dbfile = NULL;
dbsubfile = NULL;
} else {
#ifdef HACK /* XXX necessary to support dbsubfile */
dbfile = (dbi->dbi_file ? dbi->dbi_file : db3basename);
dbsubfile = (dbi->dbi_subfile ? dbi->dbi_subfile : rpmTagGetName(dbi->dbi_rpmtag));
#else
dbfile = (dbi->dbi_file ? dbi->dbi_file : rpmTagGetName(dbi->dbi_rpmtag));
dbsubfile = NULL;
#endif
}
oflags = (dbi->dbi_oeflags | dbi->dbi_oflags);
oflags &= ~DB_TRUNCATE; /* XXX this is dangerous */
#if 0 /* XXX rpmdb: illegal flag combination specified to DB->open */
if ( dbi->dbi_mode & O_EXCL) oflags |= DB_EXCL;
#endif
/*
* Map open mode flags onto configured database/environment flags.
*/
if (dbi->dbi_temporary) {
oflags |= DB_CREATE;
dbi->dbi_oeflags |= DB_CREATE;
oflags &= ~DB_RDONLY;
dbi->dbi_oflags &= ~DB_RDONLY;
} else {
if ((dbi->dbi_mode & O_ACCMODE) == O_RDONLY) oflags |= DB_RDONLY;
if (dbi->dbi_mode & O_CREAT) {
oflags |= DB_CREATE;
dbi->dbi_oeflags |= DB_CREATE;
}
#ifdef DANGEROUS
if ( dbi->dbi_mode & O_TRUNC) oflags |= DB_TRUNCATE;
#endif
}
/*
* Create the /var/lib/rpm directory if it doesn't exist (root only).
*/
(void) rpmioMkpath(dbhome, 0755, getuid(), getgid());
/*
* Avoid incompatible DB_CREATE/DB_RDONLY flags on DBENV->open.
*/
if (dbi->dbi_use_dbenv) {
if (access(dbhome, W_OK) == -1) {
/* dbhome is unwritable, don't attempt DB_CREATE on DB->open ... */
oflags &= ~DB_CREATE;
/* ... but DBENV->open might still need DB_CREATE ... */
if (dbi->dbi_eflags & DB_PRIVATE) {
dbi->dbi_eflags &= ~DB_JOINENV;
} else {
dbi->dbi_eflags |= DB_JOINENV;
dbi->dbi_oeflags &= ~DB_CREATE;
dbi->dbi_oeflags &= ~DB_THREAD;
/* ... but, unless DB_PRIVATE is used, skip DBENV. */
dbi->dbi_use_dbenv = 0;
}
/* ... DB_RDONLY maps dbhome perms across files ... */
if (dbi->dbi_temporary) {
oflags |= DB_CREATE;
dbi->dbi_oeflags |= DB_CREATE;
oflags &= ~DB_RDONLY;
dbi->dbi_oflags &= ~DB_RDONLY;
} else {
oflags |= DB_RDONLY;
/* ... and DB_WRITECURSOR won't be needed ... */
dbi->dbi_oflags |= DB_RDONLY;
}
} else { /* dbhome is writable, check for persistent dbenv. */
char * dbf = rpmGetPath(dbhome, "/__db.001", NULL);
if (access(dbf, F_OK) == -1) {
/* ... non-existent (or unwritable) DBENV, will create ... */
dbi->dbi_oeflags |= DB_CREATE;
dbi->dbi_eflags &= ~DB_JOINENV;
} else {
/* ... pre-existent (or bogus) DBENV, will join ... */
if (dbi->dbi_eflags & DB_PRIVATE) {
dbi->dbi_eflags &= ~DB_JOINENV;
} else {
dbi->dbi_eflags |= DB_JOINENV;
dbi->dbi_oeflags &= ~DB_CREATE;
dbi->dbi_oeflags &= ~DB_THREAD;
}
}
dbf = _free(dbf);
}
}
/*
* Avoid incompatible DB_CREATE/DB_RDONLY flags on DB->open.
*/
if ((oflags & DB_CREATE) && (oflags & DB_RDONLY)) {
/* dbhome is writable, and DB->open flags may conflict. */
const char * dbfn = (dbfile ? dbfile : rpmTagGetName(dbi->dbi_rpmtag));
char * dbf = rpmGetPath(dbhome, "/", dbfn, NULL);
if (access(dbf, F_OK) == -1) {
/* File does not exist, DB->open might create ... */
oflags &= ~DB_RDONLY;
} else {
/* File exists, DB->open need not create ... */
oflags &= ~DB_CREATE;
}
/* Only writers need DB_WRITECURSOR ... */
if (!(oflags & DB_RDONLY) && access(dbf, W_OK) == 0) {
dbi->dbi_oflags &= ~DB_RDONLY;
} else {
dbi->dbi_oflags |= DB_RDONLY;
}
dbf = _free(dbf);
}
/*
* Turn off verify-on-close if opening read-only.
*/
if (oflags & DB_RDONLY)
dbi->dbi_verify_on_close = 0;
if (dbi->dbi_use_dbenv) {
if (rpmdb->db_dbenv == NULL) {
rc = db_init(dbi, dbhome, dbfile, dbsubfile, &dbenv);
if (rc == 0) {
rpmdb->db_dbenv = dbenv;
rpmdb->db_opens = 1;
}
} else {
dbenv = rpmdb->db_dbenv;
rpmdb->db_opens++;
}
}
{ char *dbiflags = prDbiOpenFlags(oflags, 0);
rpmlog(RPMLOG_DEBUG, "opening db index %s/%s %s mode=0x%x\n",
dbhome, (dbfile ? dbfile : rpmTagGetName(dbi->dbi_rpmtag)),
dbiflags, dbi->dbi_mode);
free(dbiflags);
}
if (rc == 0) {
static int _lockdbfd = 0;
rc = db_create(&db, dbenv, dbi->dbi_cflags);
rc = cvtdberr(dbi, "db_create", rc, _debug);
if (rc == 0 && db != NULL) {
if (rc == 0 &&
rpmdb->db_malloc && rpmdb->db_realloc && rpmdb->db_free)
{
rc = db->set_alloc(db,
rpmdb->db_malloc, rpmdb->db_realloc, rpmdb->db_free);
rc = cvtdberr(dbi, "db->set_alloc", rc, _debug);
}
/* 4.1: db->set_cache_priority(???) */
if (rc == 0 && !dbi->dbi_use_dbenv && dbi->dbi_cachesize) {
rc = db->set_cachesize(db, 0, dbi->dbi_cachesize, 0);
rc = cvtdberr(dbi, "db->set_cachesize", rc, _debug);
}
/* 4.1: db->set_encrypt(???) */
/* 4.1: db->set_errcall(dbenv, rpmdb->db_errcall); */
/* 4.1: db->set_errfile(dbenv, rpmdb->db_errfile); */
/* 4.1: db->set_errpfx(dbenv, rpmdb->db_errpfx); */
/* 4.1: db->set_feedback(???) */
if (rc == 0 && dbi->dbi_lorder) {
rc = db->set_lorder(db, dbi->dbi_lorder);
rc = cvtdberr(dbi, "db->set_lorder", rc, _debug);
}
if (rc == 0 && dbi->dbi_pagesize) {
rc = db->set_pagesize(db, dbi->dbi_pagesize);
rc = cvtdberr(dbi, "db->set_pagesize", rc, _debug);
}
/* 4.1: db->set_paniccall(???) */
if (rc == 0 && oflags & DB_CREATE) {
switch(dbi->dbi_type) {
default:
case DB_HASH:
if (dbi->dbi_h_ffactor) {
rc = db->set_h_ffactor(db, dbi->dbi_h_ffactor);
rc = cvtdberr(dbi, "db->set_h_ffactor", rc, _debug);
if (rc) break;
}
if (dbi->dbi_h_nelem) {
rc = db->set_h_nelem(db, dbi->dbi_h_nelem);
rc = cvtdberr(dbi, "db->set_h_nelem", rc, _debug);
if (rc) break;
}
if (dbi->dbi_h_flags) {
rc = db->set_flags(db, dbi->dbi_h_flags);
rc = cvtdberr(dbi, "db->set_h_flags", rc, _debug);
if (rc) break;
}
if (dbi->dbi_h_hash_fcn) {
rc = db->set_h_hash(db, dbi->dbi_h_hash_fcn);
rc = cvtdberr(dbi, "db->set_h_hash", rc, _debug);
if (rc) break;
}
if (dbi->dbi_h_dup_compare_fcn) {
rc = db->set_dup_compare(db, dbi->dbi_h_dup_compare_fcn);
rc = cvtdberr(dbi, "db->set_dup_compare", rc, _debug);
if (rc) break;
}
break;
case DB_BTREE:
/* 4.1: db->set_append_recno(???) */
if (dbi->dbi_bt_flags) {
rc = db->set_flags(db, dbi->dbi_bt_flags);
rc = cvtdberr(dbi, "db->set_bt_flags", rc, _debug);
if (rc) break;
}
if (dbi->dbi_bt_minkey) {
rc = db->set_bt_minkey(db, dbi->dbi_bt_minkey);
rc = cvtdberr(dbi, "db->set_bt_minkey", rc, _debug);
if (rc) break;
}
if (dbi->dbi_bt_compare_fcn) {
rc = db->set_bt_compare(db, dbi->dbi_bt_compare_fcn);
rc = cvtdberr(dbi, "db->set_bt_compare", rc, _debug);
if (rc) break;
}
if (dbi->dbi_bt_dup_compare_fcn) {
rc = db->set_dup_compare(db, dbi->dbi_bt_dup_compare_fcn);
rc = cvtdberr(dbi, "db->set_dup_compare", rc, _debug);
if (rc) break;
}
if (dbi->dbi_bt_prefix_fcn) {
rc = db->set_bt_prefix(db, dbi->dbi_bt_prefix_fcn);
rc = cvtdberr(dbi, "db->set_bt_prefix", rc, _debug);
if (rc) break;
}
break;
case DB_RECNO:
if (dbi->dbi_re_delim) {
/* 4.1: db->set_append_recno(???) */
rc = db->set_re_delim(db, dbi->dbi_re_delim);
rc = cvtdberr(dbi, "db->set_re_selim", rc, _debug);
if (rc) break;
}
if (dbi->dbi_re_len) {
rc = db->set_re_len(db, dbi->dbi_re_len);
rc = cvtdberr(dbi, "db->set_re_len", rc, _debug);
if (rc) break;
}
if (dbi->dbi_re_pad) {
rc = db->set_re_pad(db, dbi->dbi_re_pad);
rc = cvtdberr(dbi, "db->set_re_pad", rc, _debug);
if (rc) break;
}
if (dbi->dbi_re_source) {
rc = db->set_re_source(db, dbi->dbi_re_source);
rc = cvtdberr(dbi, "db->set_re_source", rc, _debug);
if (rc) break;
}
break;
case DB_QUEUE:
if (dbi->dbi_q_extentsize) {
rc = db->set_q_extentsize(db, dbi->dbi_q_extentsize);
rc = cvtdberr(dbi, "db->set_q_extentsize", rc, _debug);
if (rc) break;
}
break;
}
}
if (rc == 0) {
char * fullpath;
const char * dbpath;
fullpath = rpmGetPath(dbhome, "/", dbfile ? dbfile : "", NULL);
#ifdef HACK /* XXX necessary to support dbsubfile */
dbpath = (!dbi->dbi_use_dbenv && !dbi->dbi_temporary)
? fullpath : dbfile;
#else
dbpath = (!dbi->dbi_temporary)
? fullpath : dbfile;
#endif
rc = (db->open)(db, txnid, dbpath, dbsubfile,
dbi->dbi_type, oflags, dbi->dbi_perms);
if (rc == 0 && dbi->dbi_type == DB_UNKNOWN) {
DBTYPE dbi_type = DB_UNKNOWN;
xx = db->get_type(db, &dbi_type);
if (xx == 0)
dbi->dbi_type = dbi_type;
}
free(fullpath);
}
/* XXX return rc == errno without printing */
_printit = (rc > 0 ? 0 : _debug);
xx = cvtdberr(dbi, "db->open", rc, _printit);
dbi->dbi_txnid = NULL;
/*
* Lock a file using fcntl(2). Traditionally this is Packages,
* the file used to store metadata of installed header(s),
* as Packages is always opened, and should be opened first,
* for any rpmdb access.
*
* If no DBENV is used, then access is protected with a
* shared/exclusive locking scheme, as always.
*
* With a DBENV, the fcntl(2) lock is necessary only to keep
* the riff-raff from playing where they don't belong, as
* the DBENV should provide it's own locking scheme. So try to
* acquire a lock, but permit failures, as some other
* DBENV player may already have acquired the lock.
*
* With NPTL posix mutexes, revert to fcntl lock on non-functioning
* glibc/kernel combinations.
*/
if (rc == 0 && dbi->dbi_lockdbfd &&
!((dbi->dbi_ecflags & DB_CLIENT) && dbi->dbi_host) &&
(!dbi->dbi_use_dbenv || _lockdbfd++ == 0))
{
int fdno = -1;
if (!(db->fd(db, &fdno) == 0 && fdno >= 0)) {
rc = 1;
} else {
struct flock l;
memset(&l, 0, sizeof(l));
l.l_whence = 0;
l.l_start = 0;
l.l_len = 0;
l.l_type = (dbi->dbi_mode & O_ACCMODE) == O_RDONLY
? F_RDLCK : F_WRLCK;
l.l_pid = 0;
rc = fcntl(fdno, F_SETLK, (void *) &l);
if (rc) {
/* Warning iff using non-private CDB locking. */
rc = ((dbi->dbi_use_dbenv &&
(dbi->dbi_eflags & DB_INIT_CDB) &&
!(dbi->dbi_eflags & DB_PRIVATE))
? 0 : 1);
rpmlog( (rc ? RPMLOG_ERR : RPMLOG_WARNING),
_("cannot get %s lock on %s/%s\n"),
((dbi->dbi_mode & O_ACCMODE) == O_RDONLY)
? _("shared") : _("exclusive"),
dbhome, (dbfile ? dbfile : ""));
} else if (dbfile) {
rpmlog(RPMLOG_DEBUG,
"locked db index %s/%s\n",
dbhome, dbfile);
}
}
}
}
}
dbi->dbi_db = db;
if (rc == 0 && dbi->dbi_db != NULL && dbip != NULL) {
dbi->dbi_vec = &db3vec;
*dbip = dbi;
} else {
dbi->dbi_verify_on_close = 0;
(void) db3close(dbi, 0);
}
free(dbhome);
return rc;
}