db_server_util.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:19k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 2000-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: db_server_util.c,v 1.59 2002/03/27 04:32:50 bostic Exp $";
- #endif /* not lint */
- #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 <rpc/rpc.h>
- #include <limits.h>
- #include <signal.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #endif
- #include "dbinc_auto/db_server.h"
- #include "db_int.h"
- #include "dbinc_auto/clib_ext.h"
- #include "dbinc/db_server_int.h"
- #include "dbinc_auto/rpc_server_ext.h"
- #include "dbinc_auto/common_ext.h"
- extern int __dbsrv_main __P((void));
- static int add_home __P((char *));
- static int add_passwd __P((char *));
- static int env_recover __P((char *));
- static void __dbclear_child __P((ct_entry *));
- static LIST_HEAD(cthead, ct_entry) __dbsrv_head;
- static LIST_HEAD(homehead, home_entry) __dbsrv_home;
- static long __dbsrv_defto = DB_SERVER_TIMEOUT;
- static long __dbsrv_maxto = DB_SERVER_MAXTIMEOUT;
- static long __dbsrv_idleto = DB_SERVER_IDLETIMEOUT;
- static char *logfile = NULL;
- static char *prog;
- static void usage __P((char *));
- static void version_check __P((void));
- int __dbsrv_verbose = 0;
- int
- main(argc, argv)
- int argc;
- char **argv;
- {
- extern char *optarg;
- CLIENT *cl;
- int ch, ret;
- char *passwd;
- prog = argv[0];
- version_check();
- ret = 0;
- /*
- * Check whether another server is running or not. There
- * is a race condition where two servers could be racing to
- * register with the portmapper. The goal of this check is to
- * forbid running additional servers (like those started from
- * the test suite) if the user is already running one.
- *
- * XXX
- * This does not solve nor prevent two servers from being
- * started at the same time and running recovery at the same
- * time on the same environments.
- */
- if ((cl = clnt_create("localhost",
- DB_RPC_SERVERPROG, DB_RPC_SERVERVERS, "tcp")) != NULL) {
- fprintf(stderr,
- "%s: Berkeley DB RPC server already running.n", prog);
- clnt_destroy(cl);
- return (EXIT_FAILURE);
- }
- LIST_INIT(&__dbsrv_home);
- while ((ch = getopt(argc, argv, "h:I:L:P:t:T:Vv")) != EOF)
- switch (ch) {
- case 'h':
- (void)add_home(optarg);
- break;
- case 'I':
- if (__db_getlong(NULL, prog,
- optarg, 1, LONG_MAX, &__dbsrv_idleto))
- return (EXIT_FAILURE);
- break;
- case 'L':
- logfile = optarg;
- break;
- case 'P':
- passwd = strdup(optarg);
- memset(optarg, 0, strlen(optarg));
- if (passwd == NULL) {
- fprintf(stderr, "%s: strdup: %sn",
- prog, strerror(errno));
- return (EXIT_FAILURE);
- }
- if ((ret = add_passwd(passwd)) != 0) {
- fprintf(stderr, "%s: strdup: %sn",
- prog, strerror(ret));
- return (EXIT_FAILURE);
- }
- break;
- case 't':
- if (__db_getlong(NULL, prog,
- optarg, 1, LONG_MAX, &__dbsrv_defto))
- return (EXIT_FAILURE);
- break;
- case 'T':
- if (__db_getlong(NULL, prog,
- optarg, 1, LONG_MAX, &__dbsrv_maxto))
- return (EXIT_FAILURE);
- break;
- case 'V':
- printf("%sn", db_version(NULL, NULL, NULL));
- return (EXIT_SUCCESS);
- case 'v':
- __dbsrv_verbose = 1;
- break;
- default:
- usage(prog);
- }
- /*
- * Check default timeout against maximum timeout
- */
- if (__dbsrv_defto > __dbsrv_maxto)
- __dbsrv_defto = __dbsrv_maxto;
- /*
- * Check default timeout against idle timeout
- * It would be bad to timeout environments sooner than txns.
- */
- if (__dbsrv_defto > __dbsrv_idleto)
- fprintf(stderr,
- "%s: WARNING: Idle timeout %ld is less than resource timeout %ldn",
- prog, __dbsrv_idleto, __dbsrv_defto);
- LIST_INIT(&__dbsrv_head);
- /*
- * If a client crashes during an RPC, our reply to it
- * generates a SIGPIPE. Ignore SIGPIPE so we don't exit unnecessarily.
- */
- #ifdef SIGPIPE
- signal(SIGPIPE, SIG_IGN);
- #endif
- if (logfile != NULL && __db_util_logset("berkeley_db_svc", logfile))
- return (EXIT_FAILURE);
- /*
- * Now that we are ready to start, run recovery on all the
- * environments specified.
- */
- if (env_recover(prog) != 0)
- return (EXIT_FAILURE);
- /*
- * We've done our setup, now call the generated server loop
- */
- if (__dbsrv_verbose)
- printf("%s: Ready to receive requestsn", prog);
- __dbsrv_main();
- /* NOTREACHED */
- abort();
- }
- static void
- usage(prog)
- char *prog;
- {
- fprintf(stderr, "usage: %s %snt%sn", prog,
- "[-Vv] [-h home] [-P passwd]",
- "[-I idletimeout] [-L logfile] [-t def_timeout] [-T maxtimeout]");
- exit(EXIT_FAILURE);
- }
- static void
- version_check()
- {
- 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",
- prog, DB_VERSION_MAJOR, DB_VERSION_MINOR,
- DB_VERSION_PATCH, v_major, v_minor, v_patch);
- exit(EXIT_FAILURE);
- }
- }
- /*
- * PUBLIC: void __dbsrv_settimeout __P((ct_entry *, u_int32_t));
- */
- void
- __dbsrv_settimeout(ctp, to)
- ct_entry *ctp;
- u_int32_t to;
- {
- if (to > (u_int32_t)__dbsrv_maxto)
- ctp->ct_timeout = __dbsrv_maxto;
- else if (to <= 0)
- ctp->ct_timeout = __dbsrv_defto;
- else
- ctp->ct_timeout = to;
- }
- /*
- * PUBLIC: void __dbsrv_timeout __P((int));
- */
- void
- __dbsrv_timeout(force)
- int force;
- {
- static long to_hint = -1;
- time_t t;
- long to;
- ct_entry *ctp, *nextctp;
- if ((t = time(NULL)) == -1)
- return;
- /*
- * Check hint. If hint is further in the future
- * than now, no work to do.
- */
- if (!force && to_hint > 0 && t < to_hint)
- return;
- to_hint = -1;
- /*
- * Timeout transactions or cursors holding DB resources.
- * Do this before timing out envs to properly release resources.
- *
- * !!!
- * We can just loop through this list looking for cursors and txns.
- * We do not need to verify txn and cursor relationships at this
- * point because we maintain the list in LIFO order *and* we
- * maintain activity in the ultimate txn parent of any cursor
- * so either everything in a txn is timing out, or nothing.
- * So, since we are LIFO, we will correctly close/abort all the
- * appropriate handles, in the correct order.
- */
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL; ctp = nextctp) {
- nextctp = LIST_NEXT(ctp, entries);
- switch (ctp->ct_type) {
- case CT_TXN:
- to = *(ctp->ct_activep) + ctp->ct_timeout;
- /* TIMEOUT */
- if (to < t) {
- if (__dbsrv_verbose)
- printf("Timing out txn id %ldn",
- ctp->ct_id);
- (void)((DB_TXN *)ctp->ct_anyp)->
- abort((DB_TXN *)ctp->ct_anyp);
- __dbdel_ctp(ctp);
- /*
- * If we timed out an txn, we may have closed
- * all sorts of ctp's.
- * So start over with a guaranteed good ctp.
- */
- nextctp = LIST_FIRST(&__dbsrv_head);
- } else if ((to_hint > 0 && to_hint > to) ||
- to_hint == -1)
- to_hint = to;
- break;
- case CT_CURSOR:
- case (CT_JOINCUR | CT_CURSOR):
- to = *(ctp->ct_activep) + ctp->ct_timeout;
- /* TIMEOUT */
- if (to < t) {
- if (__dbsrv_verbose)
- printf("Timing out cursor %ldn",
- ctp->ct_id);
- (void)__dbc_close_int(ctp);
- /*
- * Start over with a guaranteed good ctp.
- */
- nextctp = LIST_FIRST(&__dbsrv_head);
- } else if ((to_hint > 0 && to_hint > to) ||
- to_hint == -1)
- to_hint = to;
- break;
- default:
- break;
- }
- }
- /*
- * Timeout idle handles.
- * If we are forcing a timeout, we'll close all env handles.
- */
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL; ctp = nextctp) {
- nextctp = LIST_NEXT(ctp, entries);
- if (ctp->ct_type != CT_ENV)
- continue;
- to = *(ctp->ct_activep) + ctp->ct_idle;
- /* TIMEOUT */
- if (to < t || force) {
- if (__dbsrv_verbose)
- printf("Timing out env id %ldn", ctp->ct_id);
- (void)__dbenv_close_int(ctp->ct_id, 0, 1);
- /*
- * If we timed out an env, we may have closed
- * all sorts of ctp's (maybe even all of them.
- * So start over with a guaranteed good ctp.
- */
- nextctp = LIST_FIRST(&__dbsrv_head);
- }
- }
- }
- /*
- * RECURSIVE FUNCTION. We need to clear/free any number of levels of nested
- * layers.
- */
- static void
- __dbclear_child(parent)
- ct_entry *parent;
- {
- ct_entry *ctp, *nextctp;
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL;
- ctp = nextctp) {
- nextctp = LIST_NEXT(ctp, entries);
- if (ctp->ct_type == 0)
- continue;
- if (ctp->ct_parent == parent) {
- __dbclear_child(ctp);
- /*
- * Need to do this here because le_next may
- * have changed with the recursive call and we
- * don't want to point to a removed entry.
- */
- nextctp = LIST_NEXT(ctp, entries);
- __dbclear_ctp(ctp);
- }
- }
- }
- /*
- * PUBLIC: void __dbclear_ctp __P((ct_entry *));
- */
- void
- __dbclear_ctp(ctp)
- ct_entry *ctp;
- {
- LIST_REMOVE(ctp, entries);
- __os_free(NULL, ctp);
- }
- /*
- * PUBLIC: void __dbdel_ctp __P((ct_entry *));
- */
- void
- __dbdel_ctp(parent)
- ct_entry *parent;
- {
- __dbclear_child(parent);
- __dbclear_ctp(parent);
- }
- /*
- * PUBLIC: ct_entry *new_ct_ent __P((int *));
- */
- ct_entry *
- new_ct_ent(errp)
- int *errp;
- {
- time_t t;
- ct_entry *ctp, *octp;
- int ret;
- if ((ret = __os_malloc(NULL, sizeof(ct_entry), &ctp)) != 0) {
- *errp = ret;
- return (NULL);
- }
- memset(ctp, 0, sizeof(ct_entry));
- /*
- * Get the time as ID. We may service more than one request per
- * second however. If we are, then increment id value until we
- * find an unused one. We insert entries in LRU fashion at the
- * head of the list. So, if the first entry doesn't match, then
- * we know for certain that we can use our entry.
- */
- if ((t = time(NULL)) == -1) {
- *errp = __os_get_errno();
- __os_free(NULL, ctp);
- return (NULL);
- }
- octp = LIST_FIRST(&__dbsrv_head);
- if (octp != NULL && octp->ct_id >= t)
- t = octp->ct_id + 1;
- ctp->ct_id = t;
- ctp->ct_idle = __dbsrv_idleto;
- ctp->ct_activep = &ctp->ct_active;
- ctp->ct_origp = NULL;
- ctp->ct_refcount = 1;
- LIST_INSERT_HEAD(&__dbsrv_head, ctp, entries);
- return (ctp);
- }
- /*
- * PUBLIC: ct_entry *get_tableent __P((long));
- */
- ct_entry *
- get_tableent(id)
- long id;
- {
- ct_entry *ctp;
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL;
- ctp = LIST_NEXT(ctp, entries))
- if (ctp->ct_id == id)
- return (ctp);
- return (NULL);
- }
- /*
- * PUBLIC: ct_entry *__dbsrv_sharedb __P((ct_entry *, const char *,
- * PUBLIC: const char *, DBTYPE, u_int32_t));
- */
- ct_entry *
- __dbsrv_sharedb(db_ctp, name, subdb, type, flags)
- ct_entry *db_ctp;
- const char *name, *subdb;
- DBTYPE type;
- u_int32_t flags;
- {
- ct_entry *ctp;
- /*
- * Check if we can share a db handle. Criteria for sharing are:
- * If any of the non-sharable flags are set, we cannot share.
- * Must be a db ctp, obviously.
- * Must share the same env parent.
- * Must be the same type, or current one DB_UNKNOWN.
- * Must be same byteorder, or current one must not care.
- * All flags must match.
- * Must be same name, but don't share in-memory databases.
- * Must be same subdb name.
- */
- if (flags & DB_SERVER_DBNOSHARE)
- return (NULL);
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL;
- ctp = LIST_NEXT(ctp, entries)) {
- /*
- * Skip ourselves.
- */
- if (ctp == db_ctp)
- continue;
- if (ctp->ct_type != CT_DB)
- continue;
- if (ctp->ct_envparent != db_ctp->ct_envparent)
- continue;
- if (type != DB_UNKNOWN && ctp->ct_dbdp.type != type)
- continue;
- if (ctp->ct_dbdp.dbflags != LF_ISSET(DB_SERVER_DBFLAGS))
- continue;
- if (db_ctp->ct_dbdp.setflags != 0 &&
- ctp->ct_dbdp.setflags != db_ctp->ct_dbdp.setflags)
- continue;
- if (name == NULL || ctp->ct_dbdp.db == NULL ||
- strcmp(name, ctp->ct_dbdp.db) != 0)
- continue;
- if (subdb != ctp->ct_dbdp.subdb &&
- (subdb == NULL || ctp->ct_dbdp.subdb == NULL ||
- strcmp(subdb, ctp->ct_dbdp.subdb) != 0))
- continue;
- /*
- * If we get here, then we match.
- */
- ctp->ct_refcount++;
- return (ctp);
- }
- return (NULL);
- }
- /*
- * PUBLIC: ct_entry *__dbsrv_shareenv __P((ct_entry *, home_entry *, u_int32_t));
- */
- ct_entry *
- __dbsrv_shareenv(env_ctp, home, flags)
- ct_entry *env_ctp;
- home_entry *home;
- u_int32_t flags;
- {
- ct_entry *ctp;
- /*
- * Check if we can share an env. Criteria for sharing are:
- * Must be an env ctp, obviously.
- * Must share the same home env.
- * All flags must match.
- */
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL;
- ctp = LIST_NEXT(ctp, entries)) {
- /*
- * Skip ourselves.
- */
- if (ctp == env_ctp)
- continue;
- if (ctp->ct_type != CT_ENV)
- continue;
- if (ctp->ct_envdp.home != home)
- continue;
- if (ctp->ct_envdp.envflags != flags)
- continue;
- if (ctp->ct_envdp.onflags != env_ctp->ct_envdp.onflags)
- continue;
- if (ctp->ct_envdp.offflags != env_ctp->ct_envdp.offflags)
- continue;
- /*
- * If we get here, then we match. The only thing left to
- * check is the timeout. Since the server timeout set by
- * the client is a hint, for sharing we'll give them the
- * benefit of the doubt and grant them the longer timeout.
- */
- if (ctp->ct_timeout < env_ctp->ct_timeout)
- ctp->ct_timeout = env_ctp->ct_timeout;
- ctp->ct_refcount++;
- return (ctp);
- }
- return (NULL);
- }
- /*
- * PUBLIC: void __dbsrv_active __P((ct_entry *));
- */
- void
- __dbsrv_active(ctp)
- ct_entry *ctp;
- {
- time_t t;
- ct_entry *envctp;
- if (ctp == NULL)
- return;
- if ((t = time(NULL)) == -1)
- return;
- *(ctp->ct_activep) = t;
- if ((envctp = ctp->ct_envparent) == NULL)
- return;
- *(envctp->ct_activep) = t;
- return;
- }
- /*
- * PUBLIC: int __db_close_int __P((long, u_int32_t));
- */
- int
- __db_close_int(id, flags)
- long id;
- u_int32_t flags;
- {
- DB *dbp;
- int ret;
- ct_entry *ctp;
- ret = 0;
- ctp = get_tableent(id);
- if (ctp == NULL)
- return (DB_NOSERVER_ID);
- DB_ASSERT(ctp->ct_type == CT_DB);
- if (__dbsrv_verbose && ctp->ct_refcount != 1)
- printf("Deref'ing dbp id %ld, refcount %dn",
- id, ctp->ct_refcount);
- if (--ctp->ct_refcount != 0)
- return (ret);
- dbp = ctp->ct_dbp;
- if (__dbsrv_verbose)
- printf("Closing dbp id %ldn", id);
- ret = dbp->close(dbp, flags);
- __dbdel_ctp(ctp);
- return (ret);
- }
- /*
- * PUBLIC: int __dbc_close_int __P((ct_entry *));
- */
- int
- __dbc_close_int(dbc_ctp)
- ct_entry *dbc_ctp;
- {
- DBC *dbc;
- int ret;
- ct_entry *ctp;
- dbc = (DBC *)dbc_ctp->ct_anyp;
- ret = dbc->c_close(dbc);
- /*
- * If this cursor is a join cursor then we need to fix up the
- * cursors that it was joined from so that they are independent again.
- */
- if (dbc_ctp->ct_type & CT_JOINCUR)
- for (ctp = LIST_FIRST(&__dbsrv_head); ctp != NULL;
- ctp = LIST_NEXT(ctp, entries)) {
- /*
- * Test if it is a join cursor, and if it is part
- * of this one.
- */
- if ((ctp->ct_type & CT_JOIN) &&
- ctp->ct_activep == &dbc_ctp->ct_active) {
- ctp->ct_type &= ~CT_JOIN;
- ctp->ct_activep = ctp->ct_origp;
- __dbsrv_active(ctp);
- }
- }
- __dbclear_ctp(dbc_ctp);
- return (ret);
- }
- /*
- * PUBLIC: int __dbenv_close_int __P((long, u_int32_t, int));
- */
- int
- __dbenv_close_int(id, flags, force)
- long id;
- u_int32_t flags;
- int force;
- {
- DB_ENV *dbenv;
- int ret;
- ct_entry *ctp;
- ret = 0;
- ctp = get_tableent(id);
- if (ctp == NULL)
- return (DB_NOSERVER_ID);
- DB_ASSERT(ctp->ct_type == CT_ENV);
- if (__dbsrv_verbose && ctp->ct_refcount != 1)
- printf("Deref'ing env id %ld, refcount %dn",
- id, ctp->ct_refcount);
- /*
- * If we are timing out, we need to force the close, no matter
- * what the refcount.
- */
- if (--ctp->ct_refcount != 0 && !force)
- return (ret);
- dbenv = ctp->ct_envp;
- if (__dbsrv_verbose)
- printf("Closing env id %ldn", id);
- ret = dbenv->close(dbenv, flags);
- __dbdel_ctp(ctp);
- return (ret);
- }
- static int
- add_home(home)
- char *home;
- {
- home_entry *hp, *homep;
- int ret;
- if ((ret = __os_malloc(NULL, sizeof(home_entry), &hp)) != 0)
- return (ret);
- if ((ret = __os_malloc(NULL, strlen(home)+1, &hp->home)) != 0)
- return (ret);
- memcpy(hp->home, home, strlen(home)+1);
- hp->dir = home;
- hp->passwd = NULL;
- /*
- * This loop is to remove any trailing path separators,
- * to assure hp->name points to the last component.
- */
- hp->name = __db_rpath(home);
- *(hp->name) = ' ';
- hp->name++;
- while (*(hp->name) == ' ') {
- hp->name = __db_rpath(home);
- *(hp->name) = ' ';
- hp->name++;
- }
- /*
- * Now we have successfully added it. Make sure there are no
- * identical names.
- */
- for (homep = LIST_FIRST(&__dbsrv_home); homep != NULL;
- homep = LIST_NEXT(homep, entries))
- if (strcmp(homep->name, hp->name) == 0) {
- printf("Already added home name %s, at directory %sn",
- hp->name, homep->dir);
- __os_free(NULL, hp->home);
- __os_free(NULL, hp);
- return (-1);
- }
- LIST_INSERT_HEAD(&__dbsrv_home, hp, entries);
- if (__dbsrv_verbose)
- printf("Added home %s in dir %sn", hp->name, hp->dir);
- return (0);
- }
- static int
- add_passwd(passwd)
- char *passwd;
- {
- home_entry *hp;
- /*
- * We add the passwd to the last given home dir. If there
- * isn't a home dir, or the most recent one already has a
- * passwd, then there is a user error.
- */
- hp = LIST_FIRST(&__dbsrv_home);
- if (hp == NULL || hp->passwd != NULL)
- return (EINVAL);
- /*
- * We've already strdup'ed the passwd above, so we don't need
- * to malloc new space, just point to it.
- */
- hp->passwd = passwd;
- return (0);
- }
- /*
- * PUBLIC: home_entry *get_home __P((char *));
- */
- home_entry *
- get_home(name)
- char *name;
- {
- home_entry *hp;
- for (hp = LIST_FIRST(&__dbsrv_home); hp != NULL;
- hp = LIST_NEXT(hp, entries))
- if (strcmp(name, hp->name) == 0)
- return (hp);
- return (NULL);
- }
- static int
- env_recover(progname)
- char *progname;
- {
- DB_ENV *dbenv;
- home_entry *hp;
- u_int32_t flags;
- int exitval, ret;
- for (hp = LIST_FIRST(&__dbsrv_home); hp != NULL;
- hp = LIST_NEXT(hp, entries)) {
- exitval = 0;
- if ((ret = db_env_create(&dbenv, 0)) != 0) {
- fprintf(stderr, "%s: db_env_create: %sn",
- progname, db_strerror(ret));
- exit(EXIT_FAILURE);
- }
- if (__dbsrv_verbose == 1) {
- (void)dbenv->set_verbose(dbenv, DB_VERB_RECOVERY, 1);
- (void)dbenv->set_verbose(dbenv, DB_VERB_CHKPOINT, 1);
- }
- dbenv->set_errfile(dbenv, stderr);
- dbenv->set_errpfx(dbenv, progname);
- if (hp->passwd != NULL)
- (void)dbenv->set_encrypt(dbenv, hp->passwd,
- DB_ENCRYPT_AES);
- /*
- * Initialize the env with DB_RECOVER. That is all we
- * have to do to run recovery.
- */
- if (__dbsrv_verbose)
- printf("Running recovery on %sn", hp->home);
- flags = DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL |
- DB_INIT_TXN | DB_USE_ENVIRON | DB_RECOVER;
- if ((ret = dbenv->open(dbenv, hp->home, flags, 0)) != 0) {
- dbenv->err(dbenv, ret, "DB_ENV->open");
- goto error;
- }
- if (0) {
- error: exitval = 1;
- }
- if ((ret = dbenv->close(dbenv, 0)) != 0) {
- exitval = 1;
- fprintf(stderr, "%s: dbenv->close: %sn",
- progname, db_strerror(ret));
- }
- if (exitval)
- return (exitval);
- }
- return (0);
- }