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