ex_access.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:4k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997, 1998, 1999, 2000
- * Sleepycat Software. All rights reserved.
- *
- * $Id: ex_access.c,v 11.7 2000/05/22 15:17:03 sue Exp $
- */
- #include "db_config.h"
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include <db.h>
- #ifdef HAVE_VXWORKS
- #include "stdio.h"
- #define DATABASE "/vxtmp/vxtmp/access.db"
- #define ERROR_RETURN ERROR
- #else
- #define DATABASE "access.db"
- #define ERROR_RETURN 1
- int main __P((int, char *[]));
- void usage __P((char *));
- #endif
- int ex_access __P((void));
- #ifndef HAVE_VXWORKS
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- extern char *optarg;
- extern int optind;
- int ch;
- while ((ch = getopt(argc, argv, "")) != EOF)
- switch (ch) {
- case '?':
- default:
- usage(argv[0]);
- }
- argc -= optind;
- argv += optind;
- return (ex_access());
- }
- void
- usage(progname)
- char *progname;
- {
- (void)fprintf(stderr, "usage: %sn", progname);
- exit(1);
- }
- #endif
- int
- ex_access()
- {
- DB *dbp;
- DBC *dbcp;
- DBT key, data;
- u_int32_t len;
- int ret;
- char *p, *t, buf[1024], rbuf[1024];
- const char *progname = "ex_access"; /* Program name. */
- /* Remove the previous database. */
- (void)unlink(DATABASE);
- /* Create and initialize database object, open the database. */
- if ((ret = db_create(&dbp, NULL, 0)) != 0) {
- fprintf(stderr,
- "%s: db_create: %sn", progname, db_strerror(ret));
- return (ERROR_RETURN);
- }
- dbp->set_errfile(dbp, stderr);
- dbp->set_errpfx(dbp, progname);
- if ((ret = dbp->set_pagesize(dbp, 1024)) != 0) {
- dbp->err(dbp, ret, "set_pagesize");
- goto err1;
- }
- if ((ret = dbp->set_cachesize(dbp, 0, 32 * 1024, 0)) != 0) {
- dbp->err(dbp, ret, "set_cachesize");
- goto err1;
- }
- if ((ret =
- dbp->open(dbp, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
- dbp->err(dbp, ret, "%s: open", DATABASE);
- goto err1;
- }
- /*
- * Insert records into the database, where the key is the user
- * input and the data is the user input in reverse order.
- */
- memset(&key, 0, sizeof(DBT));
- memset(&data, 0, sizeof(DBT));
- for (;;) {
- printf("input> ");
- fflush(stdout);
- if (fgets(buf, sizeof(buf), stdin) == NULL)
- break;
- if ((len = strlen(buf)) <= 1)
- continue;
- for (t = rbuf, p = buf + (len - 2); p >= buf;)
- *t++ = *p--;
- *t++ = ' ';
- key.data = buf;
- data.data = rbuf;
- data.size = key.size = len - 1;
- switch (ret =
- dbp->put(dbp, NULL, &key, &data, DB_NOOVERWRITE)) {
- case 0:
- break;
- default:
- dbp->err(dbp, ret, "DB->put");
- if (ret != DB_KEYEXIST)
- goto err1;
- break;
- }
- }
- printf("n");
- /* Acquire a cursor for the database. */
- if ((ret = dbp->cursor(dbp, NULL, &dbcp, 0)) != 0) {
- dbp->err(dbp, ret, "DB->cursor");
- goto err1;
- }
- /* Initialize the key/data pair so the flags aren't set. */
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- /* Walk through the database and print out the key/data pairs. */
- while ((ret = dbcp->c_get(dbcp, &key, &data, DB_NEXT)) == 0)
- printf("%.*s : %.*sn",
- (int)key.size, (char *)key.data,
- (int)data.size, (char *)data.data);
- if (ret != DB_NOTFOUND) {
- dbp->err(dbp, ret, "DBcursor->get");
- goto err2;
- }
- /* Close everything down. */
- if ((ret = dbcp->c_close(dbcp)) != 0) {
- dbp->err(dbp, ret, "DBcursor->close");
- goto err1;
- }
- if ((ret = dbp->close(dbp, 0)) != 0) {
- fprintf(stderr,
- "%s: DB->close: %sn", progname, db_strerror(ret));
- return (ERROR_RETURN);
- }
- return (0);
- err2: (void)dbcp->c_close(dbcp);
- err1: (void)dbp->close(dbp, 0);
- return (ERROR_RETURN);
- }