/* Generate all four files corresponding to dbc. */
static krb5_error_code
ctx_allfiles(krb5_db2_context *dbc, char **dbname_out, char **lockname_out,
char **polname_out, char **plockname_out)
{
char *a = NULL, *b = NULL, *c = NULL, *d = NULL;
*dbname_out = *lockname_out = *polname_out = *plockname_out = NULL;
if (ctx_dbsuffix(dbc, SUFFIX_DB, &a))
goto error;
if (ctx_dbsuffix(dbc, SUFFIX_LOCK, &b))
goto error;
if (ctx_dbsuffix(dbc, SUFFIX_POLICY, &c))
goto error;
if (ctx_dbsuffix(dbc, SUFFIX_POLICY_LOCK, &d))
goto error;
*dbname_out = a;
*lockname_out = b;
*polname_out = c;
*plockname_out = d;
return 0;
error:
free(a);
free(b);
free(c);
free(d);
return ENOMEM;
}
/*
* Open the DB2 database described by dbc, using the specified flags and mode,
* and return the resulting handle. Try both hash and btree database types;
* dbc->hashfirst determines which is attempted first. If dbc->hashfirst
* indicated the wrong type, update it to indicate the correct type.
*/
static DB *
open_db(krb5_db2_context *dbc, int flags, int mode)
{
char *fname = NULL;
DB *db;
BTREEINFO bti;
HASHINFO hashi;
bti.flags = 0;
bti.cachesize = 0;
bti.psize = 4096;
bti.lorder = 0;
bti.minkeypage = 0;
bti.compare = NULL;
bti.prefix = NULL;
if (ctx_dbsuffix(dbc, SUFFIX_DB, &fname) != 0) {
errno = ENOMEM;
return NULL;
}
hashi.bsize = 4096;
hashi.cachesize = 0;
hashi.ffactor = 40;
hashi.hash = NULL;
hashi.lorder = 0;
hashi.nelem = 1;
/* Try our best guess at the database type. */
db = dbopen(fname, flags, mode,
dbc->hashfirst ? DB_HASH : DB_BTREE,
dbc->hashfirst ? (void *) &hashi : (void *) &bti);
if (db != NULL)
goto done;
/* If that was wrong, retry with the other type. */
switch (errno) {
#ifdef EFTYPE
case EFTYPE:
#endif
case EINVAL:
db = dbopen(fname, flags, mode,
dbc->hashfirst ? DB_BTREE : DB_HASH,
dbc->hashfirst ? (void *) &bti : (void *) &hashi);
/* If that worked, update our guess for next time. */
if (db != NULL)
dbc->hashfirst = !dbc->hashfirst;
break;
}
/* Don't try unlocked iteration with a hash database. */
if (db != NULL && dbc->hashfirst)
dbc->unlockiter = FALSE;
done:
free(fname);
return db;
}
/*
* Open the DB2 database described by dbc, using the specified flags and mode,
* and return the resulting handle. Try both hash and btree database types;
* dbc->hashfirst determines which is attempted first. If dbc->hashfirst
* indicated the wrong type, update it to indicate the correct type.
*/
static krb5_error_code
open_db(krb5_context context, krb5_db2_context *dbc, int flags, int mode,
DB **db_out)
{
char *fname = NULL;
DB *db;
BTREEINFO bti;
HASHINFO hashi;
bti.flags = 0;
bti.cachesize = 0;
bti.psize = 4096;
bti.lorder = 0;
bti.minkeypage = 0;
bti.compare = NULL;
bti.prefix = NULL;
*db_out = NULL;
if (ctx_dbsuffix(dbc, SUFFIX_DB, &fname) != 0)
return ENOMEM;
hashi.bsize = 4096;
hashi.cachesize = 0;
hashi.ffactor = 40;
hashi.hash = NULL;
hashi.lorder = 0;
hashi.nelem = 1;
/* Try our best guess at the database type. */
db = dbopen(fname, flags, mode,
dbc->hashfirst ? DB_HASH : DB_BTREE,
dbc->hashfirst ? (void *) &hashi : (void *) &bti);
if (db == NULL && IS_EFTYPE(errno)) {
db = dbopen(fname, flags, mode,
dbc->hashfirst ? DB_BTREE : DB_HASH,
dbc->hashfirst ? (void *) &bti : (void *) &hashi);
/* If that worked, update our guess for next time. */
if (db != NULL)
dbc->hashfirst = !dbc->hashfirst;
}
/* Don't try unlocked iteration with a hash database. */
if (db != NULL && dbc->hashfirst)
dbc->unlockiter = FALSE;
if (db == NULL) {
k5_prependmsg(context, errno, _("Cannot open DB2 database '%s'"),
fname);
}
*db_out = db;
free(fname);
return (db == NULL) ? errno : 0;
}
/* Initialize the lock file and policy database fields of dbc. The db_name and
* tempdb fields must already be set. */
static krb5_error_code
ctx_init(krb5_db2_context *dbc)
{
krb5_error_code retval;
char *polname = NULL, *plockname = NULL;
retval = ctx_dbsuffix(dbc, SUFFIX_LOCK, &dbc->db_lf_name);
if (retval)
return retval;
/*
* should be opened read/write so that write locking can work with
* POSIX systems
*/
if ((dbc->db_lf_file = open(dbc->db_lf_name, O_RDWR, 0666)) < 0) {
if ((dbc->db_lf_file = open(dbc->db_lf_name, O_RDONLY, 0666)) < 0) {
retval = errno;
goto cleanup;
}
}
set_cloexec_fd(dbc->db_lf_file);
dbc->db_inited++;
retval = ctx_dbsuffix(dbc, SUFFIX_POLICY, &polname);
if (retval)
goto cleanup;
retval = ctx_dbsuffix(dbc, SUFFIX_POLICY_LOCK, &plockname);
if (retval)
goto cleanup;
retval = osa_adb_init_db(&dbc->policy_db, polname, plockname,
OSA_ADB_POLICY_DB_MAGIC);
cleanup:
free(polname);
free(plockname);
if (retval)
ctx_clear(dbc);
return retval;
}
