diff options
Diffstat (limited to 'db_dump')
| -rw-r--r-- | db_dump/db_dump.c | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/db_dump/db_dump.c b/db_dump/db_dump.c new file mode 100644 index 0000000..6263e16 --- /dev/null +++ b/db_dump/db_dump.c @@ -0,0 +1,510 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996-2009 Oracle. All rights reserved. + * + * $Id$ + */ + +#include "db_config.h" + +#include "db_int.h" +#include "dbinc/db_page.h" +#include "dbinc/db_am.h" + +#ifndef lint +static const char copyright[] = + "Copyright (c) 1996-2009 Oracle. All rights reserved.\n"; +#endif + +int db_init __P((DB_ENV *, char *, int, u_int32_t, int *)); +int dump_sub __P((DB_ENV *, DB *, char *, int, int)); +int main __P((int, char *[])); +int show_subs __P((DB *)); +int usage __P((void)); +int version_check __P((void)); + +const char *progname; + +int +main(argc, argv) + int argc; + char *argv[]; +{ + extern char *optarg; + extern int optind; + DB_ENV *dbenv; + DB *dbp; + u_int32_t cache; + int ch; + int exitval, keyflag, lflag, mflag, nflag, pflag, sflag, private; + int ret, Rflag, rflag, resize; + char *dbname, *dopt, *filename, *home, *passwd; + + if ((progname = __db_rpath(argv[0])) == NULL) + progname = argv[0]; + else + ++progname; + + if ((ret = version_check()) != 0) + return (ret); + + dbenv = NULL; + dbp = NULL; + exitval = lflag = mflag = nflag = pflag = rflag = Rflag = sflag = 0; + keyflag = 0; + cache = MEGABYTE; + private = 0; + dbname = dopt = filename = home = passwd = NULL; + while ((ch = getopt(argc, argv, "d:f:h:klm:NpP:rRs:V")) != EOF) + switch (ch) { + case 'd': + dopt = optarg; + break; + case 'f': + if (freopen(optarg, "w", stdout) == NULL) { + fprintf(stderr, "%s: %s: reopen: %s\n", + progname, optarg, strerror(errno)); + return (EXIT_FAILURE); + } + break; + case 'h': + home = optarg; + break; + case 'k': + keyflag = 1; + break; + case 'l': + lflag = 1; + break; + case 'm': + mflag = 1; + dbname = optarg; + break; + case 'N': + nflag = 1; + break; + case 'P': + passwd = strdup(optarg); + memset(optarg, 0, strlen(optarg)); + if (passwd == NULL) { + fprintf(stderr, "%s: strdup: %s\n", + progname, strerror(errno)); + return (EXIT_FAILURE); + } + break; + case 'p': + pflag = 1; + break; + case 's': + sflag = 1; + dbname = optarg; + break; + case 'R': + Rflag = 1; + /* DB_AGGRESSIVE requires DB_SALVAGE */ + /* FALLTHROUGH */ + case 'r': + rflag = 1; + break; + case 'V': + printf("%s\n", db_version(NULL, NULL, NULL)); + return (EXIT_SUCCESS); + case '?': + default: + return (usage()); + } + argc -= optind; + argv += optind; + + /* + * A file name must be specified, unless we're looking for an in-memory + * db, in which case it must not. + */ + if (argc == 0 && mflag) + filename = NULL; + else if (argc == 1 && !mflag) + filename = argv[0]; + else + return (usage()); + + if (dopt != NULL && pflag) { + fprintf(stderr, + "%s: the -d and -p options may not both be specified\n", + progname); + return (EXIT_FAILURE); + } + if (lflag && sflag) { + fprintf(stderr, + "%s: the -l and -s options may not both be specified\n", + progname); + return (EXIT_FAILURE); + } + if ((lflag || sflag) && mflag) { + fprintf(stderr, + "%s: the -m option may not be specified with -l or -s\n", + progname); + return (EXIT_FAILURE); + } + + if (keyflag && rflag) { + fprintf(stderr, "%s: %s", + "the -k and -r or -R options may not both be specified\n", + progname); + return (EXIT_FAILURE); + } + + if ((mflag || sflag) && rflag) { + fprintf(stderr, "%s: %s", + "the -r or R options may not be specified with -m or -s\n", + 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: %s\n", progname, db_strerror(ret)); + goto err; + } + + 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; + } + +#if 0 + Set application-specific btree compression functions here. For example: + if ((ret = dbp->set_bt_compress( + dbp, local_compress_func, local_decompress_func)) != 0) { + dbp->err(dbp, ret, "DB->set_bt_compress"); + goto err; + } +#endif + + /* + * If we're salvaging, don't do an open; it might not be safe. + * Dispatch now into the salvager. + */ + if (rflag) { + /* The verify method is a destructor. */ + ret = dbp->verify(dbp, filename, NULL, stdout, + DB_SALVAGE | + (Rflag ? DB_AGGRESSIVE : 0) | + (pflag ? DB_PRINTABLE : 0)); + dbp = NULL; + if (ret != 0) + goto err; + goto done; + } + + if ((ret = dbp->open(dbp, NULL, + filename, dbname, DB_UNKNOWN, DB_RDWRMASTER|DB_RDONLY, 0)) != 0) { + dbp->err(dbp, ret, "open: %s", + filename == NULL ? dbname : filename); + goto err; + } + if (private != 0) { + if ((ret = __db_util_cache(dbp, &cache, &resize)) != 0) + goto err; + if (resize) { + (void)dbp->close(dbp, 0); + dbp = NULL; + + (void)dbenv->close(dbenv, 0); + dbenv = NULL; + goto retry; + } + } + + if (dopt != NULL) { + if ((ret = __db_dumptree(dbp, NULL, dopt, NULL)) != 0) { + dbp->err(dbp, ret, "__db_dumptree: %s", filename); + goto err; + } + } else if (lflag) { + if (dbp->get_multiple(dbp)) { + if (show_subs(dbp)) + goto err; + } else { + dbp->errx(dbp, + "%s: does not contain multiple databases", + filename); + goto err; + } + } else { + if (dbname == NULL && dbp->get_multiple(dbp)) { + if (dump_sub(dbenv, dbp, filename, pflag, keyflag)) + goto err; + } else + if (dbp->dump(dbp, NULL, + __db_pr_callback, stdout, pflag, keyflag)) + goto err; + } + + if (0) { +err: exitval = 1; + } +done: if (dbp != NULL && (ret = dbp->close(dbp, 0)) != 0) { + exitval = 1; + dbenv->err(dbenv, ret, "close"); + } + if (dbenv != NULL && (ret = dbenv->close(dbenv, 0)) != 0) { + exitval = 1; + fprintf(stderr, + "%s: dbenv->close: %s\n", progname, db_strerror(ret)); + } + + if (passwd != NULL) + free(passwd); + + /* 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 want to join the environment; + * 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 ((ret = dbenv->open(dbenv, home, + DB_USE_ENVIRON | (is_salvage ? DB_INIT_MPOOL : 0), 0)) == 0) + return (0); + if (ret == DB_VERSION_MISMATCH) + goto err; + + /* + * 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. */ +err: dbenv->err(dbenv, ret, "DB_ENV->open"); + return (1); +} + +/* + * 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->get(dbcp, &key, &data, + DB_IGNORE_LEASE | 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] = '\0'; + + /* 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 0 + Set application-specific btree compression functions here. + For example: + + if ((ret = dbp->set_bt_compress( + dbp, local_compress_func, local_decompress_func)) != 0) { + dbp->err(dbp, ret, "DB->set_bt_compress"); + goto err; + } +#endif + + 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 && dbp->dump( + dbp, subdb, __db_pr_callback, stdout, pflag, keyflag)) + ret = 1; + (void)dbp->close(dbp, 0); + free(subdb); + if (ret != 0) + return (1); + } + if (ret != DB_NOTFOUND) { + parent_dbp->err(parent_dbp, ret, "DBcursor->get"); + return (1); + } + + if ((ret = dbcp->close(dbcp)) != 0) { + parent_dbp->err(parent_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->get(dbcp, &key, &data, + DB_IGNORE_LEASE | DB_NEXT)) == 0) { + if ((ret = dbp->dbenv->prdbt( + &key, 1, NULL, stdout, __db_pr_callback, 0)) != 0) { + dbp->errx(dbp, NULL); + return (1); + } + } + if (ret != DB_NOTFOUND) { + dbp->err(dbp, ret, "DBcursor->get"); + return (1); + } + + if ((ret = dbcp->close(dbcp)) != 0) { + dbp->err(dbp, ret, "DBcursor->close"); + return (1); + } + return (0); +} + +/* + * usage -- + * Display the usage message. + */ +int +usage() +{ + (void)fprintf(stderr, "usage: %s [-klNprRV]\n\t%s\n", + progname, + "[-d ahr] [-f output] [-h home] [-P password] [-s database] db_file"); + (void)fprintf(stderr, "usage: %s [-kNpV] %s\n", + progname, "[-d ahr] [-f output] [-h home] -m database"); + return (EXIT_FAILURE); +} + +int +version_check() +{ + 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) { + fprintf(stderr, + "%s: version %d.%d doesn't match library version %d.%d\n", + progname, DB_VERSION_MAJOR, DB_VERSION_MINOR, + v_major, v_minor); + return (EXIT_FAILURE); + } + return (0); +} |