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ec239360d1
* db2/Makefile (distribute): Remove files which do not exist anymore.
264 lines
4.8 KiB
C
264 lines
4.8 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997, 1998
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1996, 1997, 1998\n\
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Sleepycat Software Inc. All rights reserved.\n";
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static const char sccsid[] = "@(#)db_checkpoint.c 10.21 (Sleepycat) 10/4/98";
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#endif
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#include <limits.h>
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#include <signal.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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#include <time.h>
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#include <unistd.h>
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#endif
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#include "db_int.h"
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#include "shqueue.h"
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#include "db_page.h"
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#include "log.h"
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#include "btree.h"
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#include "hash.h"
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#include "clib_ext.h"
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#include "common_ext.h"
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char *check __P((DB_ENV *, long, long));
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DB_ENV *db_init __P((char *));
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int logpid __P((char *, int));
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int main __P((int, char *[]));
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void onint __P((int));
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void siginit __P((void));
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void usage __P((void));
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int interrupted;
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const char
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*progname = "db_checkpoint"; /* Program name. */
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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 char *optarg;
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extern int optind;
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DB_ENV *dbenv;
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time_t now;
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long argval;
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u_int32_t kbytes, minutes, seconds;
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int ch, once, ret, verbose;
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char *home, *logfile;
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/*
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* XXX
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* Don't allow a fully unsigned 32-bit number, some compilers get
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* upset and require it to be specified in hexadecimal and so on.
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*/
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#define MAX_UINT32_T 2147483647
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kbytes = minutes = 0;
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once = ret = verbose = 0;
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home = logfile = NULL;
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while ((ch = getopt(argc, argv, "1h:k:L:p:v")) != EOF)
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switch (ch) {
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case '1':
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once = 1;
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break;
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case 'h':
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home = optarg;
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break;
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case 'k':
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get_long(optarg, 1, (long)MAX_UINT32_T, &argval);
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kbytes = argval;
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break;
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case 'L':
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logfile = optarg;
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break;
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case 'p':
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get_long(optarg, 1, (long)MAX_UINT32_T, &argval);
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minutes = argval;
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break;
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case 'v':
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verbose = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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usage();
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if (once == 0 && kbytes == 0 && minutes == 0) {
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warnx("at least one of -1, -k and -p must be specified");
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usage();
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}
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/* Initialize the environment. */
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siginit();
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dbenv = db_init(home);
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if (logfile != NULL && logpid(logfile, 1)) {
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(void)db_appexit(dbenv);
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return (1);
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}
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/*
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* If we have only a time delay, then we'll sleep the right amount
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* to wake up when a checkpoint is necessary. If we have a "kbytes"
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* field set, then we'll check every 30 seconds.
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*/
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seconds = kbytes != 0 ? 30 : minutes * 60;
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while (!interrupted) {
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if (verbose) {
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(void)time(&now);
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warnx("checkpoint: %s", ctime(&now));
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}
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errno = txn_checkpoint(dbenv->tx_info, kbytes, minutes);
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while (errno == DB_INCOMPLETE) {
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if (verbose)
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warnx("checkpoint did not finish, retrying\n");
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(void)sleep(2);
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errno = txn_checkpoint(dbenv->tx_info, 0, 0);
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}
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if (errno != 0) {
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ret = 1;
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warn(NULL);
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break;
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}
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if (once)
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break;
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(void)sleep(seconds);
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}
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if (logfile != NULL && logpid(logfile, 0))
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ret = 1;
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if ((errno = db_appexit(dbenv)) != 0) {
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ret = 1;
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warn(NULL);
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}
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if (interrupted) {
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(void)signal(interrupted, SIG_DFL);
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(void)raise(interrupted);
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/* NOTREACHED */
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}
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return (ret);
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}
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/*
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* db_init --
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* Initialize the environment.
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*/
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DB_ENV *
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db_init(home)
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char *home;
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{
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DB_ENV *dbenv;
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if ((dbenv = (DB_ENV *)calloc(sizeof(DB_ENV), 1)) == NULL) {
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errno = ENOMEM;
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err(1, NULL);
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}
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dbenv->db_errfile = stderr;
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dbenv->db_errpfx = progname;
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if ((errno = db_appinit(home, NULL, dbenv,
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DB_INIT_LOG | DB_INIT_TXN | DB_INIT_MPOOL | DB_USE_ENVIRON)) != 0)
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err(1, "db_appinit");
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if (memp_register(dbenv->mp_info,
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DB_FTYPE_BTREE, __bam_pgin, __bam_pgout) ||
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memp_register(dbenv->mp_info,
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DB_FTYPE_HASH, __ham_pgin, __ham_pgout)) {
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(void)db_appexit(dbenv);
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errx(1,
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"db_appinit: failed to register access method functions");
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}
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return (dbenv);
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}
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/*
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* logpid --
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* Log that we're running.
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*/
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int
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logpid(fname, is_open)
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char *fname;
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int is_open;
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{
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FILE *fp;
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time_t now;
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if (is_open) {
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if ((fp = fopen(fname, "w")) == NULL) {
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warn("%s", fname);
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return (1);
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}
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(void)time(&now);
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fprintf(fp,
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"%.24s: %lu %s", progname, (u_long)getpid(), ctime(&now));
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fclose(fp);
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} else
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(void)remove(fname);
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return (0);
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}
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/*
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* siginit --
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* Initialize the set of signals for which we want to clean up.
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* Generally, we try not to leave the shared regions locked if
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* we can.
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*/
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void
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siginit()
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{
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#ifdef SIGHUP
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(void)signal(SIGHUP, onint);
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#endif
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(void)signal(SIGINT, onint);
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(void)signal(SIGTERM, onint);
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}
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/*
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* onint --
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* Interrupt signal handler.
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*/
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void
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onint(signo)
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int signo;
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{
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if ((interrupted = signo) == 0)
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interrupted = SIGINT;
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: db_checkpoint [-1v] [-h home] [-k kbytes] [-L file] [-p min]\n");
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exit(1);
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}
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