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kvm_mkdb.c revision 1.6 
      1 /*-
      2  * Copyright (c) 1990, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char copyright[] =
     36 "@(#) Copyright (c) 1990, 1993\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)kvm_mkdb.c	8.1 (Berkeley) 6/6/93";
     42 #endif /* not lint */
     43 
     44 #include <sys/param.h>
     45 #include <sys/stat.h>
     46 
     47 #include <db.h>
     48 #include <err.h>
     49 #include <errno.h>
     50 #include <fcntl.h>
     51 #include <paths.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 
     56 #include "extern.h"
     57 
     58 static void usage __P((void));
     59 
     60 int
     61 main(argc, argv)
     62 	int argc;
     63 	char *argv[];
     64 {
     65 	DB *db;
     66 	int ch;
     67 	char *p, *nlistpath, *nlistname, dbtemp[MAXPATHLEN], dbname[MAXPATHLEN];
     68 
     69 	while ((ch = getopt(argc, argv, "")) != EOF)
     70 		switch (ch) {
     71 		case '?':
     72 		default:
     73 			usage();
     74 		}
     75 	argc -= optind;
     76 	argv += optind;
     77 
     78 	if (argc > 1)
     79 		usage();
     80 
     81 	/* If the existing db file matches the currently running kernel, exit */
     82 	if (testdb())
     83 		exit(0);
     84 
     85 #define	basename(cp)	((p = rindex((cp), '/')) != NULL ? p + 1 : (cp))
     86 	nlistpath = argc > 0 ? argv[0] : _PATH_UNIX;
     87 	nlistname = basename(nlistpath);
     88 
     89 	(void)snprintf(dbtemp, sizeof(dbtemp), "%skvm_%s.tmp",
     90 	    _PATH_VARDB, nlistname);
     91 	(void)snprintf(dbname, sizeof(dbname), "%skvm_%s.db",
     92 	    _PATH_VARDB, nlistname);
     93 	(void)umask(0);
     94 	db = dbopen(dbtemp, O_CREAT | O_EXLOCK | O_TRUNC | O_RDWR,
     95 	    S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, DB_HASH, NULL);
     96 	if (db == NULL)
     97 		err(1, "%s", dbtemp);
     98 	create_knlist(nlistpath, db);
     99 	if (db->close(db))
    100 		err(1, "%s", dbtemp);
    101 	if (rename(dbtemp, dbname))
    102 		err(1, "rename %s to %s", dbtemp, dbname);
    103 	exit(0);
    104 }
    105 
    106 void
    107 usage()
    108 {
    109 	(void)fprintf(stderr, "usage: kvm_mkdb [file]\n");
    110 	exit(1);
    111 }
    112