env_open.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:31k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: env_open.c,v 11.111 2002/09/03 01:20:51 mjc Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <ctype.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "db_int.h"
- #include "dbinc/crypto.h"
- #include "dbinc/db_page.h"
- #include "dbinc/db_shash.h"
- #include "dbinc/btree.h"
- #include "dbinc/hash.h"
- #include "dbinc/lock.h"
- #include "dbinc/log.h"
- #include "dbinc/mp.h"
- #include "dbinc/qam.h"
- #include "dbinc/rep.h"
- #include "dbinc/txn.h"
- #include "dbinc/fop.h"
- static int __db_parse __P((DB_ENV *, char *));
- static int __db_tmp_open __P((DB_ENV *, u_int32_t, char *, DB_FH *));
- static int __dbenv_config __P((DB_ENV *, const char *, u_int32_t));
- static int __dbenv_iremove __P((DB_ENV *, const char *, u_int32_t));
- static int __dbenv_refresh __P((DB_ENV *, u_int32_t));
- /*
- * db_version --
- * Return version information.
- *
- * EXTERN: char *db_version __P((int *, int *, int *));
- */
- char *
- db_version(majverp, minverp, patchp)
- int *majverp, *minverp, *patchp;
- {
- if (majverp != NULL)
- *majverp = DB_VERSION_MAJOR;
- if (minverp != NULL)
- *minverp = DB_VERSION_MINOR;
- if (patchp != NULL)
- *patchp = DB_VERSION_PATCH;
- return ((char *)DB_VERSION_STRING);
- }
- /*
- * __dbenv_open --
- * Initialize an environment.
- *
- * PUBLIC: int __dbenv_open __P((DB_ENV *, const char *, u_int32_t, int));
- */
- int
- __dbenv_open(dbenv, db_home, flags, mode)
- DB_ENV *dbenv;
- const char *db_home;
- u_int32_t flags;
- int mode;
- {
- DB_MPOOL *dbmp;
- int ret;
- u_int32_t init_flags, orig_flags;
- orig_flags = dbenv->flags;
- #undef OKFLAGS
- #define OKFLAGS
- DB_CREATE | DB_INIT_CDB | DB_INIT_LOCK | DB_INIT_LOG |
- DB_INIT_MPOOL | DB_INIT_TXN | DB_JOINENV | DB_LOCKDOWN |
- DB_PRIVATE | DB_RECOVER | DB_RECOVER_FATAL | DB_SYSTEM_MEM |
- DB_THREAD | DB_USE_ENVIRON | DB_USE_ENVIRON_ROOT
- #undef OKFLAGS_CDB
- #define OKFLAGS_CDB
- DB_CREATE | DB_INIT_CDB | DB_INIT_MPOOL | DB_LOCKDOWN |
- DB_PRIVATE | DB_SYSTEM_MEM | DB_THREAD |
- DB_USE_ENVIRON | DB_USE_ENVIRON_ROOT
- /*
- * Flags saved in the init_flags field of the environment, representing
- * flags to DB_ENV->set_flags and DB_ENV->open that need to be set.
- */
- #define DB_INITENV_CDB 0x0001 /* DB_INIT_CDB */
- #define DB_INITENV_CDB_ALLDB 0x0002 /* DB_INIT_CDB_ALLDB */
- #define DB_INITENV_LOCK 0x0004 /* DB_INIT_LOCK */
- #define DB_INITENV_LOG 0x0008 /* DB_INIT_LOG */
- #define DB_INITENV_MPOOL 0x0010 /* DB_INIT_MPOOL */
- #define DB_INITENV_TXN 0x0020 /* DB_INIT_TXN */
- if ((ret = __db_fchk(dbenv, "DB_ENV->open", flags, OKFLAGS)) != 0)
- return (ret);
- if (LF_ISSET(DB_INIT_CDB) &&
- (ret = __db_fchk(dbenv, "DB_ENV->open", flags, OKFLAGS_CDB)) != 0)
- return (ret);
- if ((ret = __db_fcchk(dbenv,
- "DB_ENV->open", flags, DB_PRIVATE, DB_SYSTEM_MEM)) != 0)
- return (ret);
- if ((ret = __db_fcchk(dbenv,
- "DB_ENV->open", flags, DB_RECOVER, DB_RECOVER_FATAL)) != 0)
- return (ret);
- if ((ret = __db_fcchk(dbenv, "DB_ENV->open", flags, DB_JOINENV,
- DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL |
- DB_INIT_TXN | DB_PRIVATE)) != 0)
- return (ret);
- /*
- * Currently we support one kind of mutex that is intra-process only,
- * POSIX 1003.1 pthreads, because a variety of systems don't support
- * the full pthreads API, and our only alternative is test-and-set.
- */
- #ifdef HAVE_MUTEX_THREAD_ONLY
- if (!LF_ISSET(DB_PRIVATE)) {
- __db_err(dbenv,
- "Berkeley DB library configured to support only DB_PRIVATE environments");
- return (EINVAL);
- }
- #endif
- /*
- * If we're doing recovery, destroy the environment so that we create
- * all the regions from scratch. I'd like to reuse already created
- * regions, but that's hard. We would have to create the environment
- * region from scratch, at least, as we have no way of knowing if its
- * linked lists are corrupted.
- *
- * I suppose we could set flags while modifying those links, but that
- * is going to be difficult to get right. The major concern I have
- * is if the application stomps the environment with a rogue pointer.
- * We have no way of detecting that, and we could be forced into a
- * situation where we start up and then crash, repeatedly.
- *
- * Note that we do not check any flags like DB_PRIVATE before calling
- * remove. We don't care if the current environment was private or
- * not, we just want to nail any files that are left-over for whatever
- * reason, from whatever session.
- */
- if (LF_ISSET(DB_RECOVER | DB_RECOVER_FATAL))
- if ((ret = __dbenv_iremove(dbenv, db_home, DB_FORCE)) != 0 ||
- (ret = __dbenv_refresh(dbenv, orig_flags)) != 0)
- return (ret);
- /* Initialize the DB_ENV structure. */
- if ((ret = __dbenv_config(dbenv, db_home, flags)) != 0)
- goto err;
- /* Convert the DB_ENV->open flags to internal flags. */
- if (LF_ISSET(DB_CREATE))
- F_SET(dbenv, DB_ENV_CREATE);
- if (LF_ISSET(DB_LOCKDOWN))
- F_SET(dbenv, DB_ENV_LOCKDOWN);
- if (LF_ISSET(DB_PRIVATE))
- F_SET(dbenv, DB_ENV_PRIVATE);
- if (LF_ISSET(DB_RECOVER_FATAL))
- F_SET(dbenv, DB_ENV_FATAL);
- if (LF_ISSET(DB_SYSTEM_MEM))
- F_SET(dbenv, DB_ENV_SYSTEM_MEM);
- if (LF_ISSET(DB_THREAD))
- F_SET(dbenv, DB_ENV_THREAD);
- /* Default permissions are read-write for both owner and group. */
- dbenv->db_mode = mode == 0 ? __db_omode("rwrw--") : mode;
- /*
- * Create/join the environment. We pass in the flags that
- * will be of interest to an environment joining later; if
- * we're not the ones to do the create, we
- * pull out whatever has been stored, if we don't do a create.
- */
- init_flags = 0;
- init_flags |= (LF_ISSET(DB_INIT_CDB) ? DB_INITENV_CDB : 0);
- init_flags |= (LF_ISSET(DB_INIT_LOCK) ? DB_INITENV_LOCK : 0);
- init_flags |= (LF_ISSET(DB_INIT_LOG) ? DB_INITENV_LOG : 0);
- init_flags |= (LF_ISSET(DB_INIT_MPOOL) ? DB_INITENV_MPOOL : 0);
- init_flags |= (LF_ISSET(DB_INIT_TXN) ? DB_INITENV_TXN : 0);
- init_flags |=
- (F_ISSET(dbenv, DB_ENV_CDB_ALLDB) ? DB_INITENV_CDB_ALLDB : 0);
- if ((ret = __db_e_attach(dbenv, &init_flags)) != 0)
- goto err;
- /*
- * __db_e_attach will return the saved init_flags field, which
- * contains the DB_INIT_* flags used when we were created.
- */
- if (LF_ISSET(DB_JOINENV)) {
- LF_CLR(DB_JOINENV);
- LF_SET((init_flags & DB_INITENV_CDB) ? DB_INIT_CDB : 0);
- LF_SET((init_flags & DB_INITENV_LOCK) ? DB_INIT_LOCK : 0);
- LF_SET((init_flags & DB_INITENV_LOG) ? DB_INIT_LOG : 0);
- LF_SET((init_flags & DB_INITENV_MPOOL) ? DB_INIT_MPOOL : 0);
- LF_SET((init_flags & DB_INITENV_TXN) ? DB_INIT_TXN : 0);
- if (LF_ISSET(DB_INITENV_CDB_ALLDB) &&
- (ret = dbenv->set_flags(dbenv, DB_CDB_ALLDB, 1)) != 0)
- goto err;
- }
- /* Initialize for CDB product. */
- if (LF_ISSET(DB_INIT_CDB)) {
- LF_SET(DB_INIT_LOCK);
- F_SET(dbenv, DB_ENV_CDB);
- }
- /*
- * Initialize the subsystems. Transactions imply logging but do not
- * imply locking. While almost all applications want both locking
- * and logging, it would not be unreasonable for a single threaded
- * process to want transactions for atomicity guarantees, but not
- * necessarily need concurrency.
- */
- if (LF_ISSET(DB_INIT_MPOOL))
- if ((ret = __memp_open(dbenv)) != 0)
- goto err;
- #ifdef HAVE_CRYPTO
- /*
- * Initialize the ciphering area prior to any running of recovery so
- * that we can initialize the keys, etc. before recovery.
- *
- * !!!
- * This must be after the mpool init, but before the log initialization
- * because log_open may attempt to run log_recover during its open.
- */
- if ((ret = __crypto_region_init(dbenv)) != 0)
- goto err;
- #endif
- if (LF_ISSET(DB_INIT_LOG | DB_INIT_TXN))
- if ((ret = __log_open(dbenv)) != 0)
- goto err;
- if (LF_ISSET(DB_INIT_LOCK))
- if ((ret = __lock_open(dbenv)) != 0)
- goto err;
- if (LF_ISSET(DB_INIT_TXN)) {
- if ((ret = __txn_open(dbenv)) != 0)
- goto err;
- /*
- * If the application is running with transactions, initialize
- * the function tables.
- */
- if ((ret = __bam_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __crdel_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __db_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __dbreg_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __fop_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __ham_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __qam_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- if ((ret = __txn_init_recover(dbenv, &dbenv->recover_dtab,
- &dbenv->recover_dtab_size)) != 0)
- goto err;
- /* Perform recovery for any previous run. */
- if (LF_ISSET(DB_RECOVER | DB_RECOVER_FATAL) &&
- (ret = __db_apprec(dbenv, NULL,
- LF_ISSET(DB_RECOVER | DB_RECOVER_FATAL))) != 0)
- goto err;
- }
- /* Initialize the replication area just in case. */
- if ((ret = __rep_region_init(dbenv)) != 0)
- goto err;
- /*
- * Initialize the DB list, and its mutex as necessary. If the env
- * handle isn't free-threaded we don't need a mutex because there
- * will never be more than a single DB handle on the list. If the
- * mpool wasn't initialized, then we can't ever open a DB handle.
- *
- * We also need to initialize the MT mutex as necessary, so do them
- * both. If we error, __dbenv_refresh() will clean up.
- *
- * !!!
- * This must come after the __memp_open call above because if we are
- * recording mutexes for system resources, we will do it in the mpool
- * region for environments and db handles. So, the mpool region must
- * already be initialized.
- */
- LIST_INIT(&dbenv->dblist);
- if (F_ISSET(dbenv, DB_ENV_THREAD) && LF_ISSET(DB_INIT_MPOOL)) {
- dbmp = dbenv->mp_handle;
- if ((ret = __db_mutex_setup(
- dbenv, dbmp->reginfo, &dbenv->dblist_mutexp,
- MUTEX_ALLOC | MUTEX_THREAD)) != 0)
- goto err;
- if ((ret = __db_mutex_setup(
- dbenv, dbmp->reginfo, &dbenv->mt_mutexp,
- MUTEX_ALLOC | MUTEX_THREAD)) != 0)
- goto err;
- }
- /*
- * If we've created the regions, are running with transactions, and did
- * not just run recovery, we need to log the fact that the transaction
- * IDs got reset.
- *
- * If we ran recovery, there may be prepared-but-not-yet-committed
- * transactions that need to be resolved. Recovery resets the minimum
- * transaction ID and logs the reset if that's appropriate, so we
- * don't need to do anything here in the recover case.
- */
- if (TXN_ON(dbenv) &&
- F_ISSET((REGINFO *)dbenv->reginfo, REGION_CREATE) &&
- !LF_ISSET(DB_RECOVER | DB_RECOVER_FATAL) &&
- (ret = __txn_reset(dbenv)) != 0)
- goto err;
- return (0);
- err: /* If we fail after creating the regions, remove them. */
- if (dbenv->reginfo != NULL &&
- F_ISSET((REGINFO *)dbenv->reginfo, REGION_CREATE)) {
- ret = __db_panic(dbenv, ret);
- (void)__dbenv_refresh(dbenv, orig_flags);
- (void)__dbenv_iremove(dbenv, db_home, DB_FORCE);
- }
- (void)__dbenv_refresh(dbenv, orig_flags);
- return (ret);
- }
- /*
- * __dbenv_remove --
- * Discard an environment.
- *
- * PUBLIC: int __dbenv_remove __P((DB_ENV *, const char *, u_int32_t));
- */
- int
- __dbenv_remove(dbenv, db_home, flags)
- DB_ENV *dbenv;
- const char *db_home;
- u_int32_t flags;
- {
- int ret, t_ret;
- ret = __dbenv_iremove(dbenv, db_home, flags);
- if ((t_ret = dbenv->close(dbenv, 0)) != 0 && ret == 0)
- ret = t_ret;
- return (ret);
- }
- /*
- * __dbenv_iremove --
- * Discard an environment, internal version.
- */
- static int
- __dbenv_iremove(dbenv, db_home, flags)
- DB_ENV *dbenv;
- const char *db_home;
- u_int32_t flags;
- {
- int ret;
- #undef OKFLAGS
- #define OKFLAGS
- DB_FORCE | DB_USE_ENVIRON | DB_USE_ENVIRON_ROOT
- /* Validate arguments. */
- if ((ret = __db_fchk(dbenv, "DB_ENV->remove", flags, OKFLAGS)) != 0)
- return (ret);
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "DB_ENV->remove");
- /* Initialize the DB_ENV structure. */
- if ((ret = __dbenv_config(dbenv, db_home, flags)) != 0)
- return (ret);
- /* Remove the environment. */
- return (__db_e_remove(dbenv, flags));
- }
- /*
- * __dbenv_config --
- * Initialize the DB_ENV structure.
- */
- static int
- __dbenv_config(dbenv, db_home, flags)
- DB_ENV *dbenv;
- const char *db_home;
- u_int32_t flags;
- {
- FILE *fp;
- int ret;
- char *p, buf[256];
- /*
- * Set the database home. Do this before calling __db_appname,
- * it uses the home directory.
- */
- if ((ret = __db_home(dbenv, db_home, flags)) != 0)
- return (ret);
- /* Parse the config file. */
- if ((ret =
- __db_appname(dbenv, DB_APP_NONE, "DB_CONFIG", 0, NULL, &p)) != 0)
- return (ret);
- fp = fopen(p, "r");
- __os_free(dbenv, p);
- if (fp != NULL) {
- while (fgets(buf, sizeof(buf), fp) != NULL) {
- if ((p = strchr(buf, 'n')) != NULL)
- *p = ' ';
- else if (strlen(buf) + 1 == sizeof(buf)) {
- __db_err(dbenv, "DB_CONFIG: line too long");
- (void)fclose(fp);
- return (EINVAL);
- }
- if (buf[0] == ' ' ||
- buf[0] == '#' || isspace((int)buf[0]))
- continue;
- if ((ret = __db_parse(dbenv, buf)) != 0) {
- (void)fclose(fp);
- return (ret);
- }
- }
- (void)fclose(fp);
- }
- /*
- * If no temporary directory path was specified in the config file,
- * choose one.
- */
- if (dbenv->db_tmp_dir == NULL && (ret = __os_tmpdir(dbenv, flags)) != 0)
- return (ret);
- /*
- * The locking file descriptor is rarely on. Set the fd to -1, not
- * because it's ever tested, but to make sure we catch mistakes.
- */
- if ((ret = __os_calloc(
- dbenv, 1, sizeof(*dbenv->lockfhp), &dbenv->lockfhp)) != 0)
- return (ret);
- dbenv->lockfhp->fd = -1;
- /* Flag that the DB_ENV structure has been initialized. */
- F_SET(dbenv, DB_ENV_OPEN_CALLED);
- return (0);
- }
- /*
- * __dbenv_close --
- * DB_ENV destructor.
- *
- * PUBLIC: int __dbenv_close __P((DB_ENV *, u_int32_t));
- */
- int
- __dbenv_close(dbenv, flags)
- DB_ENV *dbenv;
- u_int32_t flags;
- {
- char **p;
- int ret, t_ret;
- COMPQUIET(flags, 0);
- PANIC_CHECK(dbenv);
- ret = 0;
- /*
- * Before checking the reference count, we have to see if we
- * were in the middle of restoring transactions and need to
- * close the open files.
- */
- if (TXN_ON(dbenv) && (t_ret = __txn_preclose(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- if (dbenv->rep_handle != NULL &&
- (t_ret = __rep_preclose(dbenv, 1)) != 0 && ret == 0)
- ret = t_ret;
- if (dbenv->db_ref != 0) {
- __db_err(dbenv,
- "Database handles open during environment close");
- if (ret == 0)
- ret = EINVAL;
- }
- /*
- * Detach from the regions and undo the allocations done by
- * DB_ENV->open.
- */
- if ((t_ret = __dbenv_refresh(dbenv, 0)) != 0 && ret == 0)
- ret = t_ret;
- /* Do per-subsystem destruction. */
- __lock_dbenv_close(dbenv); /* void */
- if ((t_ret = __rep_dbenv_close(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- #ifdef HAVE_CRYPTO
- if ((t_ret = __crypto_dbenv_close(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- #endif
- /* Release any string-based configuration parameters we've copied. */
- if (dbenv->db_log_dir != NULL)
- __os_free(dbenv, dbenv->db_log_dir);
- if (dbenv->db_tmp_dir != NULL)
- __os_free(dbenv, dbenv->db_tmp_dir);
- if (dbenv->db_data_dir != NULL) {
- for (p = dbenv->db_data_dir; *p != NULL; ++p)
- __os_free(dbenv, *p);
- __os_free(dbenv, dbenv->db_data_dir);
- }
- /* Discard the structure. */
- memset(dbenv, CLEAR_BYTE, sizeof(DB_ENV));
- __os_free(NULL, dbenv);
- return (ret);
- }
- /*
- * __dbenv_refresh --
- * Refresh the DB_ENV structure, releasing resources allocated by
- * DB_ENV->open, and returning it to the state it was in just before
- * open was called. (Note that this means that any state set by
- * pre-open configuration functions must be preserved.)
- */
- static int
- __dbenv_refresh(dbenv, orig_flags)
- DB_ENV *dbenv;
- u_int32_t orig_flags;
- {
- DB_MPOOL *dbmp;
- int ret, t_ret;
- ret = 0;
- /*
- * Close subsystems, in the reverse order they were opened (txn
- * must be first, it may want to discard locks and flush the log).
- *
- * !!!
- * Note that these functions, like all of __dbenv_refresh, only undo
- * the effects of __dbenv_open. Functions that undo work done by
- * db_env_create or by a configurator function should go in
- * __dbenv_close.
- */
- if (TXN_ON(dbenv) &&
- (t_ret = __txn_dbenv_refresh(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- if (LOGGING_ON(dbenv) &&
- (t_ret = __log_dbenv_refresh(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- /*
- * Locking should come after logging, because closing log results
- * in files closing which may require locks being released.
- */
- if (LOCKING_ON(dbenv) &&
- (t_ret = __lock_dbenv_refresh(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- /*
- * Discard DB list and its mutex.
- * Discard the MT mutex.
- *
- * !!!
- * This must be done before we close the mpool region because we
- * may have allocated the DB handle mutex in the mpool region.
- * It must be done *after* we close the log region, though, because
- * we close databases and try to acquire the mutex when we close
- * log file handles. Ick.
- */
- LIST_INIT(&dbenv->dblist);
- if (dbenv->dblist_mutexp != NULL) {
- dbmp = dbenv->mp_handle;
- __db_mutex_free(dbenv, dbmp->reginfo, dbenv->dblist_mutexp);
- }
- if (dbenv->mt_mutexp != NULL) {
- dbmp = dbenv->mp_handle;
- __db_mutex_free(dbenv, dbmp->reginfo, dbenv->mt_mutexp);
- }
- if (dbenv->mt != NULL) {
- __os_free(dbenv, dbenv->mt);
- dbenv->mt = NULL;
- }
- if (MPOOL_ON(dbenv)) {
- /*
- * If it's a private environment, flush the contents to disk.
- * Recovery would have put everything back together, but it's
- * faster and cleaner to flush instead.
- */
- if (F_ISSET(dbenv, DB_ENV_PRIVATE) &&
- (t_ret = dbenv->memp_sync(dbenv, NULL)) != 0 && ret == 0)
- ret = t_ret;
- if ((t_ret = __memp_dbenv_refresh(dbenv)) != 0 && ret == 0)
- ret = t_ret;
- }
- /* Detach from the region. */
- if (dbenv->reginfo != NULL) {
- if ((t_ret = __db_e_detach(dbenv, 0)) != 0 && ret == 0)
- ret = t_ret;
- /*
- * !!!
- * Don't free dbenv->reginfo or set the reference to NULL,
- * that was done by __db_e_detach().
- */
- }
- /* Undo changes and allocations done by __dbenv_open. */
- if (dbenv->db_home != NULL) {
- __os_free(dbenv, dbenv->db_home);
- dbenv->db_home = NULL;
- }
- dbenv->db_mode = 0;
- if (dbenv->lockfhp != NULL) {
- __os_free(dbenv, dbenv->lockfhp);
- dbenv->lockfhp = NULL;
- }
- if (dbenv->recover_dtab != NULL) {
- __os_free(dbenv, dbenv->recover_dtab);
- dbenv->recover_dtab = NULL;
- dbenv->recover_dtab_size = 0;
- }
- dbenv->flags = orig_flags;
- return (ret);
- }
- #define DB_ADDSTR(add) {
- if ((add) != NULL) {
- /* If leading slash, start over. */
- if (__os_abspath(add)) {
- p = str;
- slash = 0;
- }
- /* Append to the current string. */
- len = strlen(add);
- if (slash)
- *p++ = PATH_SEPARATOR[0];
- memcpy(p, add, len);
- p += len;
- slash = strchr(PATH_SEPARATOR, p[-1]) == NULL;
- }
- }
- /*
- * __db_appname --
- * Given an optional DB environment, directory and file name and type
- * of call, build a path based on the DB_ENV->open rules, and return
- * it in allocated space.
- *
- * PUBLIC: int __db_appname __P((DB_ENV *, APPNAME,
- * PUBLIC: const char *, u_int32_t, DB_FH *, char **));
- */
- int
- __db_appname(dbenv, appname, file, tmp_oflags, fhp, namep)
- DB_ENV *dbenv;
- APPNAME appname;
- const char *file;
- u_int32_t tmp_oflags;
- DB_FH *fhp;
- char **namep;
- {
- size_t len, str_len;
- int data_entry, ret, slash, tmp_create;
- const char *a, *b;
- char *p, *str;
- a = b = NULL;
- data_entry = -1;
- tmp_create = 0;
- /*
- * We don't return a name when creating temporary files, just a file
- * handle. Default to an error now.
- */
- if (fhp != NULL)
- F_CLR(fhp, DB_FH_VALID);
- if (namep != NULL)
- *namep = NULL;
- /*
- * Absolute path names are never modified. If the file is an absolute
- * path, we're done.
- */
- if (file != NULL && __os_abspath(file))
- return (__os_strdup(dbenv, file, namep));
- /* Everything else is relative to the environment home. */
- if (dbenv != NULL)
- a = dbenv->db_home;
- retry: /*
- * DB_APP_NONE:
- * DB_HOME/file
- * DB_APP_DATA:
- * DB_HOME/DB_DATA_DIR/file
- * DB_APP_LOG:
- * DB_HOME/DB_LOG_DIR/file
- * DB_APP_TMP:
- * DB_HOME/DB_TMP_DIR/<create>
- */
- switch (appname) {
- case DB_APP_NONE:
- break;
- case DB_APP_DATA:
- if (dbenv != NULL && dbenv->db_data_dir != NULL &&
- (b = dbenv->db_data_dir[++data_entry]) == NULL) {
- data_entry = -1;
- b = dbenv->db_data_dir[0];
- }
- break;
- case DB_APP_LOG:
- if (dbenv != NULL)
- b = dbenv->db_log_dir;
- break;
- case DB_APP_TMP:
- if (dbenv != NULL)
- b = dbenv->db_tmp_dir;
- tmp_create = 1;
- break;
- }
- len =
- (a == NULL ? 0 : strlen(a) + 1) +
- (b == NULL ? 0 : strlen(b) + 1) +
- (file == NULL ? 0 : strlen(file) + 1);
- /*
- * Allocate space to hold the current path information, as well as any
- * temporary space that we're going to need to create a temporary file
- * name.
- */
- #define DB_TRAIL "BDBXXXXXX"
- str_len = len + sizeof(DB_TRAIL) + 10;
- if ((ret = __os_malloc(dbenv, str_len, &str)) != 0)
- return (ret);
- slash = 0;
- p = str;
- DB_ADDSTR(a);
- DB_ADDSTR(b);
- DB_ADDSTR(file);
- *p = ' ';
- /*
- * If we're opening a data file, see if it exists. If it does,
- * return it, otherwise, try and find another one to open.
- */
- if (__os_exists(str, NULL) != 0 && data_entry != -1) {
- __os_free(dbenv, str);
- b = NULL;
- goto retry;
- }
- /* Create the file if so requested. */
- if (tmp_create &&
- (ret = __db_tmp_open(dbenv, tmp_oflags, str, fhp)) != 0) {
- __os_free(dbenv, str);
- return (ret);
- }
- if (namep == NULL)
- __os_free(dbenv, str);
- else
- *namep = str;
- return (0);
- }
- /*
- * __db_home --
- * Find the database home.
- *
- * PUBLIC: int __db_home __P((DB_ENV *, const char *, u_int32_t));
- */
- int
- __db_home(dbenv, db_home, flags)
- DB_ENV *dbenv;
- const char *db_home;
- u_int32_t flags;
- {
- const char *p;
- /*
- * Use db_home by default, this allows utilities to reasonably
- * override the environment either explicitly or by using a -h
- * option. Otherwise, use the environment if it's permitted
- * and initialized.
- */
- if ((p = db_home) == NULL &&
- (LF_ISSET(DB_USE_ENVIRON) ||
- (LF_ISSET(DB_USE_ENVIRON_ROOT) && __os_isroot())) &&
- (p = getenv("DB_HOME")) != NULL && p[0] == ' ') {
- __db_err(dbenv, "illegal DB_HOME environment variable");
- return (EINVAL);
- }
- return (p == NULL ? 0 : __os_strdup(dbenv, p, &dbenv->db_home));
- }
- #define __DB_OVFL(v, max)
- if (v > max) {
- __v = v;
- __max = max;
- goto toobig;
- }
- /*
- * __db_parse --
- * Parse a single NAME VALUE pair.
- */
- static int
- __db_parse(dbenv, s)
- DB_ENV *dbenv;
- char *s;
- {
- u_long __max, __v, v1, v2, v3;
- u_int32_t flags;
- char *name, *p, *value, v4;
- /*
- * !!!
- * The value of 40 is hard-coded into format arguments to sscanf
- * below, it can't be changed here without changing it there, too.
- */
- char arg[40];
- /*
- * Name/value pairs are parsed as two white-space separated strings.
- * Leading and trailing white-space is trimmed from the value, but
- * it may contain embedded white-space. Note: we use the isspace(3)
- * macro because it's more portable, but that means that you can use
- * characters like form-feed to separate the strings.
- */
- name = s;
- for (p = name; *p != ' ' && !isspace((int)*p); ++p)
- ;
- if (*p == ' ' || p == name)
- goto illegal;
- *p = ' ';
- for (++p; isspace((int)*p); ++p)
- ;
- if (*p == ' ')
- goto illegal;
- value = p;
- for (++p; *p != ' '; ++p)
- ;
- for (--p; isspace((int)*p); --p)
- ;
- ++p;
- if (p == value) {
- illegal: __db_err(dbenv, "mis-formatted name-value pair: %s", s);
- return (EINVAL);
- }
- *p = ' ';
- if (!strcasecmp(name, "set_cachesize")) {
- if (sscanf(value, "%lu %lu %lu %c", &v1, &v2, &v3, &v4) != 3)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- __DB_OVFL(v2, UINT32_T_MAX);
- __DB_OVFL(v3, 10000);
- return (dbenv->set_cachesize(
- dbenv, (u_int32_t)v1, (u_int32_t)v2, (int)v3));
- }
- if (!strcasecmp(name, "set_data_dir") ||
- !strcasecmp(name, "db_data_dir")) /* Compatibility. */
- return (dbenv->set_data_dir(dbenv, value));
- if (!strcasecmp(name, "set_flags")) {
- if (sscanf(value, "%40s %c", arg, &v4) != 1)
- goto badarg;
- if (!strcasecmp(value, "db_cdb_alldb"))
- return (dbenv->set_flags(dbenv, DB_CDB_ALLDB, 1));
- if (!strcasecmp(value, "db_direct_db"))
- return (dbenv->set_flags(dbenv, DB_DIRECT_DB, 1));
- if (!strcasecmp(value, "db_direct_log"))
- return (dbenv->set_flags(dbenv, DB_DIRECT_LOG, 1));
- if (!strcasecmp(value, "db_nolocking"))
- return (dbenv->set_flags(dbenv, DB_NOLOCKING, 1));
- if (!strcasecmp(value, "db_nommap"))
- return (dbenv->set_flags(dbenv, DB_NOMMAP, 1));
- if (!strcasecmp(value, "db_overwrite"))
- return (dbenv->set_flags(dbenv, DB_OVERWRITE, 1));
- if (!strcasecmp(value, "db_nopanic"))
- return (dbenv->set_flags(dbenv, DB_NOPANIC, 1));
- if (!strcasecmp(value, "db_region_init"))
- return (dbenv->set_flags(dbenv, DB_REGION_INIT, 1));
- if (!strcasecmp(value, "db_txn_nosync"))
- return (dbenv->set_flags(dbenv, DB_TXN_NOSYNC, 1));
- if (!strcasecmp(value, "db_txn_write_nosync"))
- return (
- dbenv->set_flags(dbenv, DB_TXN_WRITE_NOSYNC, 1));
- if (!strcasecmp(value, "db_yieldcpu"))
- return (dbenv->set_flags(dbenv, DB_YIELDCPU, 1));
- goto badarg;
- }
- if (!strcasecmp(name, "set_lg_bsize")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lg_bsize(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lg_max")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lg_max(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lg_regionmax")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lg_regionmax(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lg_dir") ||
- !strcasecmp(name, "db_log_dir")) /* Compatibility. */
- return (dbenv->set_lg_dir(dbenv, value));
- if (!strcasecmp(name, "set_lk_detect")) {
- if (sscanf(value, "%40s %c", arg, &v4) != 1)
- goto badarg;
- if (!strcasecmp(value, "db_lock_default"))
- flags = DB_LOCK_DEFAULT;
- else if (!strcasecmp(value, "db_lock_expire"))
- flags = DB_LOCK_EXPIRE;
- else if (!strcasecmp(value, "db_lock_maxlocks"))
- flags = DB_LOCK_MAXLOCKS;
- else if (!strcasecmp(value, "db_lock_minlocks"))
- flags = DB_LOCK_MINLOCKS;
- else if (!strcasecmp(value, "db_lock_minwrite"))
- flags = DB_LOCK_MINWRITE;
- else if (!strcasecmp(value, "db_lock_oldest"))
- flags = DB_LOCK_OLDEST;
- else if (!strcasecmp(value, "db_lock_random"))
- flags = DB_LOCK_RANDOM;
- else if (!strcasecmp(value, "db_lock_youngest"))
- flags = DB_LOCK_YOUNGEST;
- else
- goto badarg;
- return (dbenv->set_lk_detect(dbenv, flags));
- }
- if (!strcasecmp(name, "set_lk_max")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lk_max(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lk_max_locks")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lk_max_locks(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lk_max_lockers")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lk_max_lockers(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lk_max_objects")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_lk_max_objects(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_lock_timeout")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_timeout(
- dbenv, (u_int32_t)v1, DB_SET_LOCK_TIMEOUT));
- }
- if (!strcasecmp(name, "set_mp_mmapsize")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_mp_mmapsize(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_region_init")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1 || v1 != 1)
- goto badarg;
- return (dbenv->set_flags(
- dbenv, DB_REGION_INIT, v1 == 0 ? 0 : 1));
- }
- if (!strcasecmp(name, "set_shm_key")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- return (dbenv->set_shm_key(dbenv, (long)v1));
- }
- if (!strcasecmp(name, "set_tas_spins")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_tas_spins(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_tmp_dir") ||
- !strcasecmp(name, "db_tmp_dir")) /* Compatibility.*/
- return (dbenv->set_tmp_dir(dbenv, value));
- if (!strcasecmp(name, "set_tx_max")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_tx_max(dbenv, (u_int32_t)v1));
- }
- if (!strcasecmp(name, "set_txn_timeout")) {
- if (sscanf(value, "%lu %c", &v1, &v4) != 1)
- goto badarg;
- __DB_OVFL(v1, UINT32_T_MAX);
- return (dbenv->set_timeout(
- dbenv, (u_int32_t)v1, DB_SET_TXN_TIMEOUT));
- }
- if (!strcasecmp(name, "set_verbose")) {
- if (sscanf(value, "%40s %c", arg, &v4) != 1)
- goto badarg;
- if (!strcasecmp(value, "db_verb_chkpoint"))
- flags = DB_VERB_CHKPOINT;
- else if (!strcasecmp(value, "db_verb_deadlock"))
- flags = DB_VERB_DEADLOCK;
- else if (!strcasecmp(value, "db_verb_recovery"))
- flags = DB_VERB_RECOVERY;
- else if (!strcasecmp(value, "db_verb_waitsfor"))
- flags = DB_VERB_WAITSFOR;
- else
- goto badarg;
- return (dbenv->set_verbose(dbenv, flags, 1));
- }
- __db_err(dbenv, "unrecognized name-value pair: %s", s);
- return (EINVAL);
- badarg: __db_err(dbenv, "incorrect arguments for name-value pair: %s", s);
- return (EINVAL);
- toobig: __db_err(dbenv,
- "%s: %lu larger than maximum value %lu", s, __v, __max);
- return (EINVAL);
- }
- /*
- * __db_tmp_open --
- * Create a temporary file.
- */
- static int
- __db_tmp_open(dbenv, tmp_oflags, path, fhp)
- DB_ENV *dbenv;
- u_int32_t tmp_oflags;
- char *path;
- DB_FH *fhp;
- {
- u_int32_t id;
- int mode, isdir, ret;
- const char *p;
- char *trv;
- /*
- * Check the target directory; if you have six X's and it doesn't
- * exist, this runs for a *very* long time.
- */
- if ((ret = __os_exists(path, &isdir)) != 0) {
- __db_err(dbenv, "%s: %s", path, db_strerror(ret));
- return (ret);
- }
- if (!isdir) {
- __db_err(dbenv, "%s: %s", path, db_strerror(EINVAL));
- return (EINVAL);
- }
- /* Build the path. */
- for (trv = path; *trv != ' '; ++trv)
- ;
- *trv = PATH_SEPARATOR[0];
- for (p = DB_TRAIL; (*++trv = *p) != ' '; ++p)
- ;
- /* Replace the X's with the process ID. */
- for (__os_id(&id); *--trv == 'X'; id /= 10)
- switch (id % 10) {
- case 0: *trv = '0'; break;
- case 1: *trv = '1'; break;
- case 2: *trv = '2'; break;
- case 3: *trv = '3'; break;
- case 4: *trv = '4'; break;
- case 5: *trv = '5'; break;
- case 6: *trv = '6'; break;
- case 7: *trv = '7'; break;
- case 8: *trv = '8'; break;
- case 9: *trv = '9'; break;
- }
- ++trv;
- /* Set up open flags and mode. */
- mode = __db_omode("rw----");
- /* Loop, trying to open a file. */
- for (;;) {
- if ((ret = __os_open(dbenv, path,
- tmp_oflags | DB_OSO_CREATE | DB_OSO_EXCL | DB_OSO_TEMP,
- mode, fhp)) == 0)
- return (0);
- /*
- * !!!:
- * If we don't get an EEXIST error, then there's something
- * seriously wrong. Unfortunately, if the implementation
- * doesn't return EEXIST for O_CREAT and O_EXCL regardless
- * of other possible errors, we've lost.
- */
- if (ret != EEXIST) {
- __db_err(dbenv,
- "tmp_open: %s: %s", path, db_strerror(ret));
- return (ret);
- }
- /*
- * Tricky little algorithm for backward compatibility.
- * Assumes sequential ordering of lower-case characters.
- */
- for (;;) {
- if (*trv == ' ')
- return (EINVAL);
- if (*trv == 'z')
- *trv++ = 'a';
- else {
- if (isdigit((int)*trv))
- *trv = 'a';
- else
- ++*trv;
- break;
- }
- }
- }
- /* NOTREACHED */
- }