db_checkpoint.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:5k
- /*-
- * 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_checkpoint.c,v 11.46 2002/08/08 03:50:31 bostic Exp $";
- #endif
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #if TIME_WITH_SYS_TIME
- #include <sys/time.h>
- #include <time.h>
- #else
- #if HAVE_SYS_TIME_H
- #include <sys/time.h>
- #else
- #include <time.h>
- #endif
- #endif
- #include <limits.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 main __P((int, char *[]));
- int usage __P((void));
- int version_check __P((const char *));
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- extern char *optarg;
- extern int optind;
- DB_ENV *dbenv;
- const char *progname = "db_checkpoint";
- time_t now;
- long argval;
- u_int32_t flags, kbytes, minutes, seconds;
- int ch, e_close, exitval, once, ret, verbose;
- char *home, *logfile, *passwd;
- if ((ret = version_check(progname)) != 0)
- return (ret);
- /*
- * !!!
- * Don't allow a fully unsigned 32-bit number, some compilers get
- * upset and require it to be specified in hexadecimal and so on.
- */
- #define MAX_UINT32_T 2147483647
- kbytes = minutes = 0;
- e_close = exitval = once = verbose = 0;
- flags = 0;
- home = logfile = passwd = NULL;
- while ((ch = getopt(argc, argv, "1h:k:L:P:p:Vv")) != EOF)
- switch (ch) {
- case '1':
- once = 1;
- flags = DB_FORCE;
- break;
- case 'h':
- home = optarg;
- break;
- case 'k':
- if (__db_getlong(NULL, progname,
- optarg, 1, (long)MAX_UINT32_T, &argval))
- return (EXIT_FAILURE);
- kbytes = argval;
- break;
- case 'L':
- logfile = optarg;
- 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':
- if (__db_getlong(NULL, progname,
- optarg, 1, (long)MAX_UINT32_T, &argval))
- return (EXIT_FAILURE);
- minutes = argval;
- break;
- case 'V':
- printf("%sn", db_version(NULL, NULL, NULL));
- return (EXIT_SUCCESS);
- case 'v':
- verbose = 1;
- break;
- case '?':
- default:
- return (usage());
- }
- argc -= optind;
- argv += optind;
- if (argc != 0)
- return (usage());
- if (once == 0 && kbytes == 0 && minutes == 0) {
- (void)fprintf(stderr,
- "%s: at least one of -1, -k and -p must be specifiedn",
- progname);
- return (EXIT_FAILURE);
- }
- /* Handle possible interruptions. */
- __db_util_siginit();
- /* Log our process ID. */
- if (logfile != NULL && __db_util_logset(progname, logfile))
- goto shutdown;
- /*
- * Create an environment object and initialize it for error
- * reporting.
- */
- if ((ret = db_env_create(&dbenv, 0)) != 0) {
- fprintf(stderr,
- "%s: db_env_create: %sn", progname, db_strerror(ret));
- goto shutdown;
- }
- e_close = 1;
- dbenv->set_errfile(dbenv, stderr);
- dbenv->set_errpfx(dbenv, progname);
- if (passwd != NULL && (ret = dbenv->set_encrypt(dbenv,
- passwd, DB_ENCRYPT_AES)) != 0) {
- dbenv->err(dbenv, ret, "set_passwd");
- goto shutdown;
- }
- /* Initialize the environment. */
- if ((ret = dbenv->open(dbenv,
- home, DB_JOINENV | DB_USE_ENVIRON, 0)) != 0) {
- dbenv->err(dbenv, ret, "open");
- goto shutdown;
- }
- /* Register the standard pgin/pgout functions, in case we do I/O. */
- if ((ret = dbenv->memp_register(
- dbenv, DB_FTYPE_SET, __db_pgin, __db_pgout)) != 0) {
- dbenv->err(dbenv, ret,
- "DB_ENV->memp_register: failed to register access method functions");
- goto shutdown;
- }
- /*
- * If we have only a time delay, then we'll sleep the right amount
- * to wake up when a checkpoint is necessary. If we have a "kbytes"
- * field set, then we'll check every 30 seconds.
- */
- seconds = kbytes != 0 ? 30 : minutes * 60;
- while (!__db_util_interrupted()) {
- if (verbose) {
- (void)time(&now);
- dbenv->errx(dbenv, "checkpoint: %s", ctime(&now));
- }
- if ((ret = dbenv->txn_checkpoint(dbenv,
- kbytes, minutes, flags)) != 0) {
- dbenv->err(dbenv, ret, "txn_checkpoint");
- goto shutdown;
- }
- if (once)
- break;
- (void)__os_sleep(dbenv, seconds, 0);
- }
- if (0) {
- shutdown: exitval = 1;
- }
- /* Clean up the logfile. */
- if (logfile != NULL)
- remove(logfile);
- /* Clean up the environment. */
- 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);
- }
- int
- usage()
- {
- (void)fprintf(stderr, "%snt%sn",
- "usage: db_checkpoint [-1Vv]",
- "[-h home] [-k kbytes] [-L file] [-P password] [-p min]");
- 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);
- }