db_dump.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:14k
- /*-
- * 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 copyright[] =
- "Copyright (c) 1996-2002nSleepycat Software Inc. All rights reserved.n";
- static const char revid[] =
- "$Id: db_dump.c,v 11.80 2002/08/08 03:50:34 bostic Exp $";
- #endif
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "db_int.h"
- #include "dbinc/db_page.h"
- #include "dbinc/db_am.h"
- int db_init __P((DB_ENV *, char *, int, u_int32_t, int *));
- int dump __P((DB *, int, int));
- int dump_sub __P((DB_ENV *, DB *, char *, int, int));
- int is_sub __P((DB *, int *));
- int main __P((int, char *[]));
- int show_subs __P((DB *));
- int usage __P((void));
- int version_check __P((const char *));
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- extern char *optarg;
- extern int optind;
- const char *progname = "db_dump";
- DB_ENV *dbenv;
- DB *dbp;
- u_int32_t cache;
- int ch, d_close;
- int e_close, exitval, keyflag, lflag, nflag, pflag, private;
- int ret, Rflag, rflag, resize, subs;
- char *dopt, *home, *passwd, *subname;
- if ((ret = version_check(progname)) != 0)
- return (ret);
- dbp = NULL;
- d_close = e_close = exitval = lflag = nflag = pflag = rflag = Rflag = 0;
- keyflag = 0;
- cache = MEGABYTE;
- private = 0;
- dopt = home = passwd = subname = NULL;
- while ((ch = getopt(argc, argv, "d:f:h:klNpP:rRs:V")) != EOF)
- switch (ch) {
- case 'd':
- dopt = optarg;
- break;
- case 'f':
- if (freopen(optarg, "w", stdout) == NULL) {
- fprintf(stderr, "%s: %s: reopen: %sn",
- progname, optarg, strerror(errno));
- return (EXIT_FAILURE);
- }
- break;
- case 'h':
- home = optarg;
- break;
- case 'k':
- keyflag = 1;
- break;
- case 'l':
- lflag = 1;
- break;
- case 'N':
- nflag = 1;
- break;
- case 'P':
- passwd = strdup(optarg);
- memset(optarg, 0, strlen(optarg));
- if (passwd == NULL) {
- fprintf(stderr, "%s: strdup: %sn",
- progname, strerror(errno));
- return (EXIT_FAILURE);
- }
- break;
- case 'p':
- pflag = 1;
- break;
- case 's':
- subname = optarg;
- break;
- case 'R':
- Rflag = 1;
- /* DB_AGGRESSIVE requires DB_SALVAGE */
- /* FALLTHROUGH */
- case 'r':
- rflag = 1;
- break;
- case 'V':
- printf("%sn", db_version(NULL, NULL, NULL));
- return (EXIT_SUCCESS);
- case '?':
- default:
- return (usage());
- }
- argc -= optind;
- argv += optind;
- if (argc != 1)
- return (usage());
- if (dopt != NULL && pflag) {
- fprintf(stderr,
- "%s: the -d and -p options may not both be specifiedn",
- progname);
- return (EXIT_FAILURE);
- }
- if (lflag && subname != NULL) {
- fprintf(stderr,
- "%s: the -l and -s options may not both be specifiedn",
- progname);
- return (EXIT_FAILURE);
- }
- if (keyflag && rflag) {
- fprintf(stderr, "%s: %s",
- "the -k and -r or -R options may not both be specifiedn",
- progname);
- return (EXIT_FAILURE);
- }
- if (subname != NULL && rflag) {
- fprintf(stderr, "%s: %s",
- "the -s and -r or R options may not both be specifiedn",
- progname);
- return (EXIT_FAILURE);
- }
- /* Handle possible interruptions. */
- __db_util_siginit();
- /*
- * Create an environment object and initialize it for error
- * reporting.
- */
- retry: if ((ret = db_env_create(&dbenv, 0)) != 0) {
- fprintf(stderr,
- "%s: db_env_create: %sn", progname, db_strerror(ret));
- goto err;
- }
- e_close = 1;
- dbenv->set_errfile(dbenv, stderr);
- dbenv->set_errpfx(dbenv, progname);
- if (nflag) {
- if ((ret = dbenv->set_flags(dbenv, DB_NOLOCKING, 1)) != 0) {
- dbenv->err(dbenv, ret, "set_flags: DB_NOLOCKING");
- goto err;
- }
- if ((ret = dbenv->set_flags(dbenv, DB_NOPANIC, 1)) != 0) {
- dbenv->err(dbenv, ret, "set_flags: DB_NOPANIC");
- goto err;
- }
- }
- if (passwd != NULL && (ret = dbenv->set_encrypt(dbenv,
- passwd, DB_ENCRYPT_AES)) != 0) {
- dbenv->err(dbenv, ret, "set_passwd");
- goto err;
- }
- /* Initialize the environment. */
- if (db_init(dbenv, home, rflag, cache, &private) != 0)
- goto err;
- /* Create the DB object and open the file. */
- if ((ret = db_create(&dbp, dbenv, 0)) != 0) {
- dbenv->err(dbenv, ret, "db_create");
- goto err;
- }
- d_close = 1;
- /*
- * If we're salvaging, don't do an open; it might not be safe.
- * Dispatch now into the salvager.
- */
- if (rflag) {
- if ((ret = dbp->verify(dbp, argv[0], NULL, stdout,
- DB_SALVAGE |
- (Rflag ? DB_AGGRESSIVE : 0) |
- (pflag ? DB_PRINTABLE : 0))) != 0)
- goto err;
- exitval = 0;
- goto done;
- }
- if ((ret = dbp->open(dbp, NULL,
- argv[0], subname, DB_UNKNOWN, DB_RDONLY, 0)) != 0) {
- dbp->err(dbp, ret, "open: %s", argv[0]);
- goto err;
- }
- if (private != 0) {
- if ((ret = __db_util_cache(dbenv, dbp, &cache, &resize)) != 0)
- goto err;
- if (resize) {
- (void)dbp->close(dbp, 0);
- d_close = 0;
- (void)dbenv->close(dbenv, 0);
- e_close = 0;
- goto retry;
- }
- }
- if (dopt != NULL) {
- if (__db_dump(dbp, dopt, NULL)) {
- dbp->err(dbp, ret, "__db_dump: %s", argv[0]);
- goto err;
- }
- } else if (lflag) {
- if (is_sub(dbp, &subs))
- goto err;
- if (subs == 0) {
- dbp->errx(dbp,
- "%s: does not contain multiple databases", argv[0]);
- goto err;
- }
- if (show_subs(dbp))
- goto err;
- } else {
- subs = 0;
- if (subname == NULL && is_sub(dbp, &subs))
- goto err;
- if (subs) {
- if (dump_sub(dbenv, dbp, argv[0], pflag, keyflag))
- goto err;
- } else
- if (__db_prheader(dbp, NULL, pflag, keyflag, stdout,
- __db_verify_callback, NULL, 0) ||
- dump(dbp, pflag, keyflag))
- goto err;
- }
- if (0) {
- err: exitval = 1;
- }
- done: if (d_close && (ret = dbp->close(dbp, 0)) != 0) {
- exitval = 1;
- dbenv->err(dbenv, ret, "close");
- }
- if (e_close && (ret = dbenv->close(dbenv, 0)) != 0) {
- exitval = 1;
- fprintf(stderr,
- "%s: dbenv->close: %sn", progname, db_strerror(ret));
- }
- /* Resend any caught signal. */
- __db_util_sigresend();
- return (exitval == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
- }
- /*
- * db_init --
- * Initialize the environment.
- */
- int
- db_init(dbenv, home, is_salvage, cache, is_privatep)
- DB_ENV *dbenv;
- char *home;
- int is_salvage;
- u_int32_t cache;
- int *is_privatep;
- {
- int ret;
- /*
- * Try and use the underlying environment when opening a database.
- * We wish to use the buffer pool so our information is as up-to-date
- * as possible, even if the mpool cache hasn't been flushed.
- *
- * If we are not doing a salvage, we wish to use the DB_JOINENV flag;
- * if a locking system is present, this will let us use it and be
- * safe to run concurrently with other threads of control. (We never
- * need to use transactions explicitly, as we're read-only.) Note
- * that in CDB, too, this will configure our environment
- * appropriately, and our cursors will (correctly) do locking as CDB
- * read cursors.
- *
- * If we are doing a salvage, the verification code will protest
- * if we initialize transactions, logging, or locking; do an
- * explicit DB_INIT_MPOOL to try to join any existing environment
- * before we create our own.
- */
- *is_privatep = 0;
- if (dbenv->open(dbenv, home,
- DB_USE_ENVIRON | (is_salvage ? DB_INIT_MPOOL : DB_JOINENV), 0) == 0)
- return (0);
- /*
- * An environment is required because we may be trying to look at
- * databases in directories other than the current one. We could
- * avoid using an environment iff the -h option wasn't specified,
- * but that seems like more work than it's worth.
- *
- * No environment exists (or, at least no environment that includes
- * an mpool region exists). Create one, but make it private so that
- * no files are actually created.
- */
- *is_privatep = 1;
- if ((ret = dbenv->set_cachesize(dbenv, 0, cache, 1)) == 0 &&
- (ret = dbenv->open(dbenv, home,
- DB_CREATE | DB_INIT_MPOOL | DB_PRIVATE | DB_USE_ENVIRON, 0)) == 0)
- return (0);
- /* An environment is required. */
- dbenv->err(dbenv, ret, "open");
- return (1);
- }
- /*
- * is_sub --
- * Return if the database contains subdatabases.
- */
- int
- is_sub(dbp, yesno)
- DB *dbp;
- int *yesno;
- {
- DB_BTREE_STAT *btsp;
- DB_HASH_STAT *hsp;
- int ret;
- switch (dbp->type) {
- case DB_BTREE:
- case DB_RECNO:
- if ((ret = dbp->stat(dbp, &btsp, DB_FAST_STAT)) != 0) {
- dbp->err(dbp, ret, "DB->stat");
- return (ret);
- }
- *yesno = btsp->bt_metaflags & BTM_SUBDB ? 1 : 0;
- free(btsp);
- break;
- case DB_HASH:
- if ((ret = dbp->stat(dbp, &hsp, DB_FAST_STAT)) != 0) {
- dbp->err(dbp, ret, "DB->stat");
- return (ret);
- }
- *yesno = hsp->hash_metaflags & DB_HASH_SUBDB ? 1 : 0;
- free(hsp);
- break;
- case DB_QUEUE:
- break;
- default:
- dbp->errx(dbp, "unknown database type");
- return (1);
- }
- return (0);
- }
- /*
- * dump_sub --
- * Dump out the records for a DB containing subdatabases.
- */
- int
- dump_sub(dbenv, parent_dbp, parent_name, pflag, keyflag)
- DB_ENV *dbenv;
- DB *parent_dbp;
- char *parent_name;
- int pflag, keyflag;
- {
- DB *dbp;
- DBC *dbcp;
- DBT key, data;
- int ret;
- char *subdb;
- /*
- * Get a cursor and step through the database, dumping out each
- * subdatabase.
- */
- if ((ret = parent_dbp->cursor(parent_dbp, NULL, &dbcp, 0)) != 0) {
- dbenv->err(dbenv, ret, "DB->cursor");
- return (1);
- }
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- while ((ret = dbcp->c_get(dbcp, &key, &data, DB_NEXT)) == 0) {
- /* Nul terminate the subdatabase name. */
- if ((subdb = malloc(key.size + 1)) == NULL) {
- dbenv->err(dbenv, ENOMEM, NULL);
- return (1);
- }
- memcpy(subdb, key.data, key.size);
- subdb[key.size] = ' ';
- /* Create the DB object and open the file. */
- if ((ret = db_create(&dbp, dbenv, 0)) != 0) {
- dbenv->err(dbenv, ret, "db_create");
- free(subdb);
- return (1);
- }
- if ((ret = dbp->open(dbp, NULL,
- parent_name, subdb, DB_UNKNOWN, DB_RDONLY, 0)) != 0)
- dbp->err(dbp, ret,
- "DB->open: %s:%s", parent_name, subdb);
- if (ret == 0 &&
- (__db_prheader(dbp, subdb, pflag, keyflag, stdout,
- __db_verify_callback, NULL, 0) ||
- dump(dbp, pflag, keyflag)))
- ret = 1;
- (void)dbp->close(dbp, 0);
- free(subdb);
- if (ret != 0)
- return (1);
- }
- if (ret != DB_NOTFOUND) {
- dbp->err(dbp, ret, "DBcursor->get");
- return (1);
- }
- if ((ret = dbcp->c_close(dbcp)) != 0) {
- dbp->err(dbp, ret, "DBcursor->close");
- return (1);
- }
- return (0);
- }
- /*
- * show_subs --
- * Display the subdatabases for a database.
- */
- int
- show_subs(dbp)
- DB *dbp;
- {
- DBC *dbcp;
- DBT key, data;
- int ret;
- /*
- * Get a cursor and step through the database, printing out the key
- * of each key/data pair.
- */
- if ((ret = dbp->cursor(dbp, NULL, &dbcp, 0)) != 0) {
- dbp->err(dbp, ret, "DB->cursor");
- return (1);
- }
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- while ((ret = dbcp->c_get(dbcp, &key, &data, DB_NEXT)) == 0) {
- if ((ret = __db_prdbt(&key, 1, NULL, stdout,
- __db_verify_callback, 0, NULL)) != 0) {
- dbp->errx(dbp, NULL);
- return (1);
- }
- }
- if (ret != DB_NOTFOUND) {
- dbp->err(dbp, ret, "DBcursor->get");
- return (1);
- }
- if ((ret = dbcp->c_close(dbcp)) != 0) {
- dbp->err(dbp, ret, "DBcursor->close");
- return (1);
- }
- return (0);
- }
- /*
- * dump --
- * Dump out the records for a DB.
- */
- int
- dump(dbp, pflag, keyflag)
- DB *dbp;
- int pflag, keyflag;
- {
- DBC *dbcp;
- DBT key, data;
- DBT keyret, dataret;
- db_recno_t recno;
- int is_recno, failed, ret;
- void *pointer;
- /*
- * Get a cursor and step through the database, printing out each
- * key/data pair.
- */
- if ((ret = dbp->cursor(dbp, NULL, &dbcp, 0)) != 0) {
- dbp->err(dbp, ret, "DB->cursor");
- return (1);
- }
- failed = 0;
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- data.data = malloc(1024 * 1024);
- if (data.data == NULL) {
- dbp->err(dbp, ENOMEM, "bulk get buffer");
- failed = 1;
- goto err;
- }
- data.ulen = 1024 * 1024;
- data.flags = DB_DBT_USERMEM;
- is_recno = (dbp->type == DB_RECNO || dbp->type == DB_QUEUE);
- keyflag = is_recno ? keyflag : 1;
- if (is_recno) {
- keyret.data = &recno;
- keyret.size = sizeof(recno);
- }
- retry:
- while ((ret =
- dbcp->c_get(dbcp, &key, &data, DB_NEXT | DB_MULTIPLE_KEY)) == 0) {
- DB_MULTIPLE_INIT(pointer, &data);
- for (;;) {
- if (is_recno)
- DB_MULTIPLE_RECNO_NEXT(pointer, &data,
- recno, dataret.data, dataret.size);
- else
- DB_MULTIPLE_KEY_NEXT(pointer,
- &data, keyret.data,
- keyret.size, dataret.data, dataret.size);
- if (dataret.data == NULL)
- break;
- if ((keyflag && (ret = __db_prdbt(&keyret,
- pflag, " ", stdout, __db_verify_callback,
- is_recno, NULL)) != 0) || (ret =
- __db_prdbt(&dataret, pflag, " ", stdout,
- __db_verify_callback, 0, NULL)) != 0) {
- dbp->errx(dbp, NULL);
- failed = 1;
- goto err;
- }
- }
- }
- if (ret == ENOMEM) {
- data.data = realloc(data.data, data.size);
- if (data.data == NULL) {
- dbp->err(dbp, ENOMEM, "bulk get buffer");
- failed = 1;
- goto err;
- }
- data.ulen = data.size;
- goto retry;
- }
- if (ret != DB_NOTFOUND) {
- dbp->err(dbp, ret, "DBcursor->get");
- failed = 1;
- }
- err: if (data.data != NULL)
- free(data.data);
- if ((ret = dbcp->c_close(dbcp)) != 0) {
- dbp->err(dbp, ret, "DBcursor->close");
- failed = 1;
- }
- (void)__db_prfooter(stdout, __db_verify_callback);
- return (failed);
- }
- /*
- * usage --
- * Display the usage message.
- */
- int
- usage()
- {
- (void)fprintf(stderr, "%snt%sn",
- "usage: db_dump [-klNprRV]",
- "[-d ahr] [-f output] [-h home] [-P password] [-s database] db_file");
- return (EXIT_FAILURE);
- }
- int
- version_check(progname)
- const char *progname;
- {
- int v_major, v_minor, v_patch;
- /* Make sure we're loaded with the right version of the DB library. */
- (void)db_version(&v_major, &v_minor, &v_patch);
- if (v_major != DB_VERSION_MAJOR ||
- v_minor != DB_VERSION_MINOR || v_patch != DB_VERSION_PATCH) {
- fprintf(stderr,
- "%s: version %d.%d.%d doesn't match library version %d.%d.%dn",
- progname, DB_VERSION_MAJOR, DB_VERSION_MINOR,
- DB_VERSION_PATCH, v_major, v_minor, v_patch);
- return (EXIT_FAILURE);
- }
- return (0);
- }