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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1997\n\
Sleepycat Software Inc. All rights reserved.\n";
static const char sccsid[] = "@(#)db_deadlock.c 10.13 (Sleepycat) 7/20/97";
#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 <time.h>
#include <unistd.h>
#endif
#include "db_int.h"
#include "clib_ext.h"
#include "common_ext.h"
#define BAD_KILLID 0xffffffff
DB_ENV *db_init __P((char *, int));
void onint __P((int));
void siginit __P((void));
void usage __P((void));
int logpid __P((char *, int));
int main __P((int, char *[]));
int interrupted;
const char *progname = "db_deadlock"; /* Program name. */
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
DB_ENV *dbenv;
u_int32_t atype;
time_t now;
long seconds;
int ch, flags, verbose;
char *home, *logfile;
atype = DB_LOCK_DEFAULT;
home = logfile = NULL;
seconds = 0;
flags = verbose = 0;
while ((ch = getopt(argc, argv, "a:h:L:t:vw")) != EOF)
switch (ch) {
case 'a':
switch (optarg[0]) {
case 'o':
atype = DB_LOCK_OLDEST;
break;
case 'y':
atype = DB_LOCK_YOUNGEST;
break;
default:
usage();
/* NOTREACHED */
}
if (optarg[1] != '\0')
usage();
break;
case 'h':
home = optarg;
break;
case 'L':
logfile = optarg;
break;
case 't':
get_long(optarg, 1, LONG_MAX, &seconds);
break;
case 'v':
verbose = 1;
break;
case 'w':
LF_SET(DB_LOCK_CONFLICT);
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
if (seconds == 0 && !LF_ISSET(DB_LOCK_CONFLICT)) {
warnx("at least one of -t and -w must be specified");
usage();
}
/*
* We detect every second when we're running in DB_LOCK_CONFLICT mode.
*/
if (seconds == 0)
seconds = 1;
/* Initialize the deadlock detector by opening the lock manager. */
dbenv = db_init(home, verbose);
if (logfile != NULL && logpid(logfile, 1)) {
(void)db_appexit(dbenv);
return (1);
}
while (!interrupted) {
if (dbenv->db_verbose != 0) {
time(&now);
__db_err(dbenv, "Running at %s", ctime(&now));
}
if ((errno = lock_detect(dbenv->lk_info, flags, atype)) != 0)
break;
/* Make a pass every "seconds" seconds. */
(void)__db_sleep(seconds, 0);
}
if (logfile != NULL)
(void)logpid(logfile, 0);
if (interrupted) {
(void)signal(interrupted, SIG_DFL);
(void)raise(interrupted);
/* NOTREACHED */
}
return (db_appexit(dbenv));
}
DB_ENV *
db_init(home, verbose)
char *home;
int verbose;
{
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;
dbenv->db_verbose = verbose;
if ((errno = db_appinit(home,
NULL, dbenv, DB_INIT_LOCK | DB_USE_ENVIRON)) != 0)
err(1, "db_appinit");
siginit();
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,
"%s: %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);
#ifdef SIGKILL
(void)signal(SIGKILL, onint);
#endif
(void)signal(SIGTERM, onint);
}
/*
* oninit --
* Interrupt signal handler.
*/
void
onint(signo)
int signo;
{
if ((interrupted = signo) == 0)
interrupted = SIGINT;
}
void
usage()
{
(void)fprintf(stderr,
"usage: db_deadlock [-vw] [-a m | o | y] [-h home] [-L file] [-t sec]\n");
exit(1);
}
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