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Diffstat (limited to 'db2/progs/db_deadlock/db_deadlock.c')
-rw-r--r--db2/progs/db_deadlock/db_deadlock.c236
1 files changed, 236 insertions, 0 deletions
diff --git a/db2/progs/db_deadlock/db_deadlock.c b/db2/progs/db_deadlock/db_deadlock.c
new file mode 100644
index 0000000000..9437e3552d
--- /dev/null
+++ b/db2/progs/db_deadlock/db_deadlock.c
@@ -0,0 +1,236 @@
+/*-
+ * 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);
+}