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[unix-history] / usr / src / usr.sbin / kvm_mkdb / kvm_mkdb.c

/*-
* Copyright (c) 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1990, 1993\n\
       The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)kvm_mkdb.c  8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>

#include <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "extern.h"

static void usage __P((void));

int
main(argc, argv)
       int argc;
       char *argv[];
{
       DB *db;
       int ch;
       char *p, *nlistpath, *nlistname, dbtemp[MAXPATHLEN], dbname[MAXPATHLEN];

       while ((ch = getopt(argc, argv, "")) != EOF)
               switch (ch) {
               case '?':
               default:
                       usage();
               }
       argc -= optind;
       argv += optind;

       if (argc > 1)
               usage();

       /* If the existing db file matches the currently running kernel, exit */
       if (testdb())
               exit(0);

#define basename(cp)    ((p = rindex((cp), '/')) != NULL ? p + 1 : (cp))
       nlistpath = argc > 0 ? argv[0] : _PATH_UNIX;
       nlistname = basename(nlistpath);

       (void)snprintf(dbtemp, sizeof(dbtemp), "%skvm_%s.tmp",
           _PATH_VARDB, nlistname);
       (void)snprintf(dbname, sizeof(dbname), "%skvm_%s.db",
           _PATH_VARDB, nlistname);
       (void)umask(0);
       db = dbopen(dbtemp, O_CREAT | O_EXLOCK | O_TRUNC | O_RDWR,
           S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, DB_HASH, NULL);
       if (db == NULL)
               err(1, "%s", dbtemp);
       create_knlist(nlistpath, db);
       if (db->close(db))
               err(1, "%s", dbtemp);
       if (rename(dbtemp, dbname))
               err(1, "rename %s to %s", dbtemp, dbname);
       exit(0);
}

void
usage()
{
       (void)fprintf(stderr, "usage: kvm_mkdb [file]\n");
       exit(1);
}