mirror of
https://github.com/berkeleydb/libdb.git
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132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997, 2012 Oracle and/or its affiliates. All rights reserved.
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*
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* $Id$
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _WIN32
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extern int getopt(int, char * const *, const char *);
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#else
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#include <unistd.h>
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#endif
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#include <db.h>
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#define DATABASE "sequence.db"
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#define SEQUENCE "my_sequence"
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int main __P((int, char *[]));
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int usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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extern int optind;
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DB *dbp;
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DB_SEQUENCE *seq;
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DBT key;
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int ch, i, ret, rflag;
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db_seq_t seqnum;
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const char *database, *progname = "ex_sequence";
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dbp = NULL;
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seq = NULL;
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rflag = 0;
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while ((ch = getopt(argc, argv, "r")) != EOF)
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switch (ch) {
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case 'r':
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rflag = 1;
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break;
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case '?':
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default:
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return (usage());
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}
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argc -= optind;
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argv += optind;
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/* Accept optional database name. */
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database = *argv == NULL ? DATABASE : argv[0];
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/* Optionally discard the database. */
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if (rflag)
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(void)remove(database);
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/* Create and initialize database object, open the database. */
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if ((ret = db_create(&dbp, NULL, 0)) != 0) {
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fprintf(stderr,
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"%s: db_create: %s\n", progname, db_strerror(ret));
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return (EXIT_FAILURE);
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}
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dbp->set_errfile(dbp, stderr);
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dbp->set_errpfx(dbp, progname);
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if ((ret = dbp->open(dbp,
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NULL, database, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
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dbp->err(dbp, ret, "%s: open", database);
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goto err;
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}
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if ((ret = db_sequence_create(&seq, dbp, 0)) != 0) {
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dbp->err(dbp, ret, "db_sequence_create");
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goto err;
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}
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memset(&key, 0, sizeof(DBT));
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key.data = SEQUENCE;
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key.size = (u_int32_t)strlen(SEQUENCE);
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if ((ret = seq->open(seq, NULL, &key, DB_CREATE)) != 0) {
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dbp->err(dbp, ret, "%s: DB_SEQUENCE->open", SEQUENCE);
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goto err;
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}
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for (i = 0; i < 10; i++) {
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if ((ret = seq->get(seq, NULL, 1, &seqnum, 0)) != 0) {
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dbp->err(dbp, ret, "DB_SEQUENCE->get");
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goto err;
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}
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/* There's no portable way to print 64-bit numbers. */
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#ifdef _WIN32
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printf("Got sequence number %I64d\n", (int64_t)seqnum);
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#else
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printf(
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"Got sequence number %llu\n", (unsigned long long)seqnum);
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#endif
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}
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/* Close everything down. */
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if ((ret = seq->close(seq, 0)) != 0) {
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seq = NULL;
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dbp->err(dbp, ret, "DB_SEQUENCE->close");
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goto err;
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}
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if ((ret = dbp->close(dbp, 0)) != 0) {
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fprintf(stderr,
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"%s: DB->close: %s\n", progname, db_strerror(ret));
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return (EXIT_FAILURE);
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}
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return (EXIT_SUCCESS);
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err: if (seq != NULL)
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(void)seq->close(seq, 0);
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if (dbp != NULL)
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(void)dbp->close(dbp, 0);
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return (EXIT_FAILURE);
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}
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int
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usage()
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{
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(void)fprintf(stderr, "usage: ex_sequence [-r] [database]\n");
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return (EXIT_FAILURE);
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}
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