729 lines
14 KiB
C
729 lines
14 KiB
C
/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christos Zoulas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char *rcsid = "$Id: netgroup_mkdb.c,v 1.4 1996/04/27 18:54:31 christos Exp $";
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#endif
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#define _NETGROUP_PRIVATE
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#include <netgroup.h>
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#include <assert.h>
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#include "str.h"
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#include "util.h"
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#define DEBUG_NG
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#define NEW(a) (a *) emalloc(sizeof(a))
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struct nentry {
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int n_type;
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size_t n_size; /* Buffer size required for printing */
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union {
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char *_name;
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struct netgroup *_group;
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} _n;
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#define n_name _n._name
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#define n_group _n._group
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struct nentry *n_next;
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};
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static DB *ng_insert __P((DB *, const char *));
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static void ng_reventry __P((DB *, DB *, struct nentry *, char *,
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size_t, struct stringlist *));
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static void ng_print __P((struct nentry *, struct string *));
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static void ng_rprint __P((DB *, struct string *));
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static DB *ng_reverse __P((DB *, size_t));
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static DB *ng_load __P((const char *));
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static void ng_write __P((DB *, DB *, int));
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static void ng_rwrite __P((DB *, DB *, int));
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static void usage __P((void));
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static void cleanup __P((void));
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#ifdef DEBUG_NG
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static int debug = 0;
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static void ng_dump __P((DB *));
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static void ng_rdump __P((DB *));
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#endif /* DEBUG_NG */
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static const char ng_empty[] = "";
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#define NG_EMPTY(a) ((a) ? (a) : ng_empty)
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static char *dbname = _PATH_NETGROUP_DB;
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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DB *db, *ndb, *hdb, *udb;
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int ch;
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char buf[MAXPATHLEN];
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char *fname = _PATH_NETGROUP;
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while ((ch = getopt(argc, argv, "do:")) != EOF)
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switch (ch) {
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#ifdef DEBUG_NG
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case 'd':
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debug++;
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break;
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#endif
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case 'o':
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dbname = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc == 1)
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fname = *argv;
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else if (argc > 1)
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usage();
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if (atexit(cleanup))
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err(1, "Cannot install exit handler");
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/* Read and parse the netgroup file */
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ndb = ng_load(fname);
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#ifdef DEBUG_NG
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if (debug) {
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(void) fprintf(stderr, "#### Database\n");
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ng_dump(ndb);
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}
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#endif
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/* Reverse the database by host */
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hdb = ng_reverse(ndb, offsetof(struct netgroup, ng_host));
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#ifdef DEBUG_NG
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if (debug) {
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(void) fprintf(stderr, "#### Reverse by host\n");
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ng_rdump(hdb);
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}
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#endif
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/* Reverse the database by user */
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udb = ng_reverse(ndb, offsetof(struct netgroup, ng_user));
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#ifdef DEBUG_NG
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if (debug) {
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(void) fprintf(stderr, "#### Reverse by user\n");
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ng_rdump(udb);
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}
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#endif
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(void) snprintf(buf, sizeof(buf), "%s.tmp", dbname);
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db = dbopen(buf, O_RDWR | O_CREAT | O_EXCL,
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(S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, NULL);
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if (!db)
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err(1, buf);
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ng_write(db, ndb, _NG_KEYBYNAME);
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ng_rwrite(db, udb, _NG_KEYBYUSER);
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ng_rwrite(db, hdb, _NG_KEYBYHOST);
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if ((db->close)(db))
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err(1, "Error closing database");
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if (rename(buf, dbname) == -1)
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err(1, "Cannot rename `%s' to `%s'", buf, dbname);
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return 0;
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}
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/*
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* cleanup(): Remove temporary files upon exit
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*/
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static void
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cleanup()
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{
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char buf[MAXPATHLEN];
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(void) snprintf(buf, sizeof(buf), "%s.tmp", dbname);
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(void) unlink(buf);
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}
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/*
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* ng_load(): Load the netgroup database from a file
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*/
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static DB *
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ng_load(fname)
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const char *fname;
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{
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FILE *fp;
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DB *db;
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char *buf;
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size_t size;
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struct nentry *tail, *head, *e;
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char *p, *name;
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struct netgroup *ng;
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DBT data, key;
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/* Open the netgroup file */
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if ((fp = fopen(fname, "r")) == NULL)
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err(1, fname);
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db = dbopen(NULL, O_RDWR | O_CREAT | O_EXCL, 0, DB_HASH, NULL);
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if (db == NULL)
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err(1, "dbopen");
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while ((buf = getline(fp, &size)) != NULL) {
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tail = head = NULL;
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p = buf;
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while (p != NULL) {
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switch (_ng_parse(&p, &name, &ng)) {
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case _NG_NONE:
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/* done with this one */
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p = NULL;
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free(buf);
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if (head == NULL)
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break;
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key.data = (u_char *) head->n_name;
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key.size = strlen(head->n_name) + 1;
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data.data = (u_char *) & head;
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data.size = sizeof(head);
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switch ((db->put)(db, &key, &data,
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R_NOOVERWRITE)) {
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case 0:
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break;
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case 1:
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warnx("Duplicate entry netgroup `%s'\n",
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head->n_name);
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break;
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case -1:
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err(1, "put");
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break;
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default:
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abort();
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break;
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}
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break;
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case _NG_NAME:
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e = NEW(struct nentry);
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e->n_type = _NG_NAME;
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e->n_name = name;
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e->n_next = NULL;
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e->n_size = size;
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if (tail == NULL)
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head = tail = e;
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else {
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tail->n_next = e;
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tail = e;
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}
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break;
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case _NG_GROUP:
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if (tail == NULL) {
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char fmt[BUFSIZ];
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_ng_print(fmt, sizeof(fmt), ng);
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errx(1, "no netgroup key for %s", fmt);
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}
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else {
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e = NEW(struct nentry);
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e->n_type = _NG_GROUP;
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e->n_group = ng;
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e->n_next = NULL;
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e->n_size = size;
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tail->n_next = e;
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tail = e;
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}
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break;
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default:
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abort();
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break;
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}
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}
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}
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(void) fclose(fp);
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return db;
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}
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/*
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* ng_insert(): Insert named key into the database, and return its associated
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* string database
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*/
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static DB *
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ng_insert(db, name)
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DB *db;
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const char *name;
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{
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DB *xdb = NULL;
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DBT key, data;
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key.data = (u_char *) name;
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key.size = strlen(name) + 1;
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switch ((db->get)(db, &key, &data, 0)) {
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case 0:
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memcpy(&xdb, data.data, sizeof(xdb));
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break;
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case 1:
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xdb = dbopen(NULL, O_RDWR | O_CREAT | O_EXCL, 0, DB_HASH, NULL);
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if (xdb == NULL)
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err(1, "dbopen");
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data.data = (u_char *) & xdb;
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data.size = sizeof(xdb);
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switch ((db->put)(db, &key, &data, R_NOOVERWRITE)) {
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case 0:
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break;
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case -1:
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err(1, "db put `%s'", name);
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break;
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case 1:
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default:
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abort();
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}
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break;
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case -1:
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err(1, "db get `%s'", name);
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break;
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default:
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abort();
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break;
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}
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return xdb;
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}
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/*
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* ng_reventry(): Recursively add all the netgroups to the group entry.
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*/
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static void
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ng_reventry(db, udb, fe, name, s, ss)
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DB *db, *udb;
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struct nentry *fe;
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char *name;
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size_t s;
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struct stringlist *ss;
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{
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DBT key, data;
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struct nentry *e;
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struct netgroup *ng;
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char *p;
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DB *xdb;
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if (_ng_sl_find(ss, name) != NULL) {
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warnx("Cycle in netgroup `%s'", name);
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return;
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}
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_ng_sl_add(ss, name);
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for (e = fe->n_next; e != NULL; e = e->n_next)
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switch (e->n_type) {
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case _NG_GROUP:
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ng = e->n_group;
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p = _ng_makekey(*((char **)(((char *) ng) + s)),
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ng->ng_domain, e->n_size);
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xdb = ng_insert(udb, p);
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key.data = (u_char *) name;
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key.size = strlen(name) + 1;
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data.data = NULL;
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data.size = 0;
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switch ((xdb->put)(xdb, &key, &data, R_NOOVERWRITE)) {
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case 0:
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case 1:
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break;
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case -1:
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err(1, "db put `%s'", name);
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return;
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default:
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abort();
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break;
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}
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free(p);
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break;
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case _NG_NAME:
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key.data = (u_char *) e->n_name;
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key.size = strlen(e->n_name) + 1;
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switch ((db->get)(db, &key, &data, 0)) {
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case 0:
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memcpy(&fe, data.data, sizeof(fe));
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ng_reventry(db, udb, fe, e->n_name, s, ss);
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break;
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case 1:
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break;
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case -1:
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err(1, "db get `%s'", e->n_name);
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return;
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default:
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abort();
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return;
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}
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break;
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default:
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abort();
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break;
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}
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}
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/*
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* ng_reverse(): Reverse the database
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*/
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static DB *
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ng_reverse(db, s)
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DB *db;
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size_t s;
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{
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int pos;
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struct stringlist *sl;
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DBT key, data;
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struct nentry *fe;
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DB *udb = dbopen(NULL, O_RDWR | O_CREAT | O_EXCL, 0,
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DB_HASH, NULL);
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if (udb == NULL)
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err(1, "dbopen");
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for (pos = R_FIRST;; pos = R_NEXT)
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switch ((db->seq)(db, &key, &data, pos)) {
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case 0:
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sl = _ng_sl_init();
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memcpy(&fe, data.data, sizeof(fe));
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ng_reventry(db, udb, fe, (char *) key.data, s, sl);
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_ng_sl_free(sl, 0);
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break;
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case 1:
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return udb;
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case -1:
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err(1, "seq");
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return udb;
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}
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return udb;
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}
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/*
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* ng_print(): Pretty print a netgroup entry
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*/
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static void
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ng_print(e, str)
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struct nentry *e;
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struct string *str;
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{
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char *ptr = emalloc(e->n_size);
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if (e->n_next == NULL) {
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str_append(str, "", ' ');
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return;
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}
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for (e = e->n_next; e != NULL; e = e->n_next) {
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switch (e->n_type) {
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case _NG_NAME:
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(void) snprintf(ptr, e->n_size, "%s", e->n_name);
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break;
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case _NG_GROUP:
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(void) snprintf(ptr, e->n_size, "(%s,%s,%s)",
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NG_EMPTY(e->n_group->ng_host),
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NG_EMPTY(e->n_group->ng_user),
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NG_EMPTY(e->n_group->ng_domain));
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break;
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default:
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errx(1, "Internal error: Bad netgroup type\n");
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break;
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}
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str_append(str, ptr, ' ');
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}
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free(ptr);
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}
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/*
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* ng_rprint(): Pretty print all reverse netgroup mappings in the given entry
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*/
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static void
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ng_rprint(db, str)
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DB *db;
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struct string *str;
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{
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int pos;
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DBT key, data;
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for (pos = R_FIRST;; pos = R_NEXT)
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switch ((db->seq)(db, &key, &data, pos)) {
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case 0:
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str_append(str, (char *) key.data, ',');
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break;
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case 1:
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return;
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default:
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err(1, "seq");
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break;
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}
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}
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#ifdef DEBUG_NG
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/*
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* ng_dump(): Pretty print all netgroups in the given database
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*/
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static void
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ng_dump(db)
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DB *db;
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{
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int pos;
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DBT key, data;
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struct nentry *e;
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struct string buf;
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for (pos = R_FIRST;; pos = R_NEXT)
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switch ((db->seq)(db, &key, &data, pos)) {
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case 0:
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memcpy(&e, data.data, sizeof(e));
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str_init(&buf);
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assert(e->n_type == _NG_NAME);
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ng_print(e, &buf);
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(void) fprintf(stderr, "%s\t%s\n", e->n_name,
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buf.s_str ? buf.s_str : "");
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str_free(&buf);
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break;
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case 1:
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return;
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default:
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err(1, "seq");
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return;
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}
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}
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/*
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* ng_rdump(): Pretty print all reverse mappings in the given database
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*/
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static void
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ng_rdump(db)
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DB *db;
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{
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int pos;
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DBT key, data;
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DB *xdb;
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struct string buf;
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for (pos = R_FIRST;; pos = R_NEXT)
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switch ((db->seq)(db, &key, &data, pos)) {
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case 0:
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memcpy(&xdb, data.data, sizeof(xdb));
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str_init(&buf);
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ng_rprint(xdb, &buf);
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(void) fprintf(stderr, "%s\t%s\n",
|
|
(char *) key.data,
|
|
buf.s_str ? buf.s_str : "");
|
|
str_free(&buf);
|
|
break;
|
|
|
|
case 1:
|
|
return;
|
|
|
|
default:
|
|
err(1, "seq");
|
|
return;
|
|
}
|
|
}
|
|
#endif /* DEBUG_NG */
|
|
|
|
|
|
/*
|
|
* ng_write(): Dump the database into a file.
|
|
*/
|
|
static void
|
|
ng_write(odb, idb, k)
|
|
DB *odb, *idb;
|
|
int k;
|
|
{
|
|
int pos;
|
|
DBT key, data;
|
|
struct nentry *e;
|
|
struct string skey, sdata;
|
|
|
|
for (pos = R_FIRST;; pos = R_NEXT)
|
|
switch ((idb->seq)(idb, &key, &data, pos)) {
|
|
case 0:
|
|
memcpy(&e, data.data, sizeof(e));
|
|
str_init(&skey);
|
|
str_init(&sdata);
|
|
assert(e->n_type == _NG_NAME);
|
|
|
|
str_prepend(&skey, e->n_name, k);
|
|
ng_print(e, &sdata);
|
|
key.data = (u_char *) skey.s_str;
|
|
key.size = skey.s_len + 1;
|
|
data.data = (u_char *) sdata.s_str;
|
|
data.size = sdata.s_len + 1;
|
|
|
|
switch ((odb->put)(odb, &key, &data, R_NOOVERWRITE)) {
|
|
case 0:
|
|
break;
|
|
|
|
case -1:
|
|
err(1, "put");
|
|
break;
|
|
|
|
case 1:
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
|
|
str_free(&skey);
|
|
str_free(&sdata);
|
|
break;
|
|
|
|
case 1:
|
|
return;
|
|
|
|
default:
|
|
err(1, "seq");
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* ng_rwrite(): Write the database
|
|
*/
|
|
static void
|
|
ng_rwrite(odb, idb, k)
|
|
DB *odb;
|
|
DB *idb;
|
|
int k;
|
|
{
|
|
int pos;
|
|
DBT key, data;
|
|
DB *xdb;
|
|
struct string skey, sdata;
|
|
|
|
for (pos = R_FIRST;; pos = R_NEXT)
|
|
switch ((idb->seq)(idb, &key, &data, pos)) {
|
|
case 0:
|
|
memcpy(&xdb, data.data, sizeof(xdb));
|
|
str_init(&skey);
|
|
str_init(&sdata);
|
|
|
|
str_prepend(&skey, (char *) key.data, k);
|
|
ng_rprint(xdb, &sdata);
|
|
key.data = (u_char *) skey.s_str;
|
|
key.size = skey.s_len + 1;
|
|
data.data = (u_char *) sdata.s_str;
|
|
data.size = sdata.s_len + 1;
|
|
|
|
switch ((odb->put)(odb, &key, &data, R_NOOVERWRITE)) {
|
|
case 0:
|
|
break;
|
|
|
|
case -1:
|
|
err(1, "put");
|
|
break;
|
|
|
|
case 1:
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
|
|
str_free(&skey);
|
|
str_free(&sdata);
|
|
break;
|
|
|
|
case 1:
|
|
return;
|
|
|
|
default:
|
|
err(1, "seq");
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* usage(): Print usage message and exit
|
|
*/
|
|
static void
|
|
usage()
|
|
{
|
|
extern const char *__progname;
|
|
fprintf(stderr, "usage: %s [-o db] file\n", __progname);
|
|
exit(1);
|
|
}
|