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NetBSD/usr.sbin/netgroup_mkdb/netgroup_mkdb.c

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/* $NetBSD: netgroup_mkdb.c,v 1.15 2006/08/26 18:15:37 christos Exp $ */
/*
* Copyright (c) 1994 Christos Zoulas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christos Zoulas.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: netgroup_mkdb.c,v 1.15 2006/08/26 18:15:37 christos Exp $");
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <db.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stringlist.h>
#define _NETGROUP_PRIVATE
#include <netgroup.h>
#include <assert.h>
#include "str.h"
#include "util.h"
#define DEBUG_NG
#define NEW(a) (a *) emalloc(sizeof(a))
struct nentry {
int n_type;
size_t n_size; /* Buffer size required for printing */
union {
char *_name;
struct netgroup *_group;
} _n;
#define n_name _n._name
#define n_group _n._group
struct nentry *n_next;
};
static void cleanup(void);
static DB *ng_insert(DB *, const char *);
static void ng_reventry(DB *, DB *, struct nentry *, char *,
size_t, StringList *);
static void ng_print(struct nentry *, struct string *);
static void ng_rprint(DB *, struct string *);
static DB *ng_reverse(DB *, size_t);
static DB *ng_load(const char *);
static void ng_write(DB *, DB *, int);
static void ng_rwrite(DB *, DB *, int);
static void usage(void) __attribute__((__noreturn__));
#ifdef DEBUG_NG
static int debug = 0;
static void ng_dump(DB *);
static void ng_rdump(DB *);
#endif /* DEBUG_NG */
static int dups = 0;
static const char ng_empty[] = "";
#define NG_EMPTY(a) ((a) ? (a) : ng_empty)
static char *dbname = _PATH_NETGROUP_DB;
int
main(int argc, char **argv)
{
DB *db, *ndb, *hdb, *udb;
int ch;
char buf[MAXPATHLEN];
char *fname = _PATH_NETGROUP;
while ((ch = getopt(argc, argv, "dDo:")) != -1)
switch (ch) {
#ifdef DEBUG_NG
case 'd':
debug++;
break;
#endif
case 'o':
dbname = optarg;
break;
case 'D':
dups++;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc == 1)
fname = *argv;
else if (argc > 1)
usage();
if (atexit(cleanup))
err(1, "Cannot install exit handler");
/* Read and parse the netgroup file */
ndb = ng_load(fname);
#ifdef DEBUG_NG
if (debug) {
(void)fprintf(stderr, "#### Database\n");
ng_dump(ndb);
}
#endif
/* Reverse the database by host */
hdb = ng_reverse(ndb, offsetof(struct netgroup, ng_host));
#ifdef DEBUG_NG
if (debug) {
(void)fprintf(stderr, "#### Reverse by host\n");
ng_rdump(hdb);
}
#endif
/* Reverse the database by user */
udb = ng_reverse(ndb, offsetof(struct netgroup, ng_user));
#ifdef DEBUG_NG
if (debug) {
(void)fprintf(stderr, "#### Reverse by user\n");
ng_rdump(udb);
}
#endif
(void)snprintf(buf, sizeof(buf), "%s.tmp", dbname);
db = dbopen(buf, O_RDWR | O_CREAT | O_EXCL,
(S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, NULL);
if (!db)
err(1, "%s", buf);
ng_write(db, ndb, _NG_KEYBYNAME);
ng_rwrite(db, udb, _NG_KEYBYUSER);
ng_rwrite(db, hdb, _NG_KEYBYHOST);
if ((db->close)(db))
err(1, "Error closing database");
if (rename(buf, dbname) == -1)
err(1, "Cannot rename `%s' to `%s'", buf, dbname);
return 0;
}
/*
* cleanup(): Remove temporary files upon exit
*/
static void
cleanup(void)
{
char buf[MAXPATHLEN];
(void)snprintf(buf, sizeof(buf), "%s.tmp", dbname);
(void)unlink(buf);
}
/*
* ng_load(): Load the netgroup database from a file
*/
static DB *
ng_load(const char *fname)
{
FILE *fp;
DB *db;
char *buf;
size_t size;
struct nentry *tail, *head, *e;
char *p, *name;
struct netgroup *ng;
DBT data, key;
/* Open the netgroup file */
if ((fp = fopen(fname, "r")) == NULL)
err(1, "%s", fname);
db = dbopen(NULL, O_RDWR | O_CREAT | O_EXCL, 0, DB_HASH, NULL);
if (db == NULL)
err(1, "dbopen");
while ((buf = fparseln(fp, &size, NULL, NULL, 0)) != NULL) {
tail = head = NULL;
p = buf;
while (p != NULL) {
switch (_ng_parse(&p, &name, &ng)) {
case _NG_NONE:
/* done with this one */
p = NULL;
free(buf);
if (head == NULL)
break;
key.data = (u_char *)head->n_name;
key.size = strlen(head->n_name) + 1;
data.data = (u_char *)&head;
data.size = sizeof(head);
switch ((db->put)(db, &key, &data,
R_NOOVERWRITE)) {
case 0:
break;
case 1:
warnx("Duplicate entry netgroup `%s'",
head->n_name);
break;
case -1:
err(1, "put");
break;
default:
abort();
break;
}
break;
case _NG_NAME:
e = NEW(struct nentry);
e->n_type = _NG_NAME;
e->n_name = name;
e->n_next = NULL;
e->n_size = size;
if (tail == NULL)
head = tail = e;
else {
tail->n_next = e;
tail = e;
}
break;
case _NG_GROUP:
if (tail == NULL) {
char fmt[BUFSIZ];
_ng_print(fmt, sizeof(fmt), ng);
errx(1, "no netgroup key for %s", fmt);
}
else {
e = NEW(struct nentry);
e->n_type = _NG_GROUP;
e->n_group = ng;
e->n_next = NULL;
e->n_size = size;
tail->n_next = e;
tail = e;
}
break;
case _NG_ERROR:
errx(1, "Fatal error at `%s'", p);
break;
default:
abort();
break;
}
}
}
(void)fclose(fp);
return db;
}
/*
* ng_insert(): Insert named key into the database, and return its associated
* string database
*/
static DB *
ng_insert(DB *db, const char *name)
{
DB *xdb = NULL;
DBT key, data;
key.data = (u_char *)name;
key.size = strlen(name) + 1;
switch ((db->get)(db, &key, &data, 0)) {
case 0:
(void)memcpy(&xdb, data.data, sizeof(xdb));
break;
case 1:
xdb = dbopen(NULL, O_RDWR | O_CREAT | O_EXCL, 0, DB_HASH, NULL);
if (xdb == NULL)
err(1, "dbopen");
data.data = (u_char *)&xdb;
data.size = sizeof(xdb);
switch ((db->put)(db, &key, &data, R_NOOVERWRITE)) {
case 0:
break;
case -1:
err(1, "db put `%s'", name);
break;
case 1:
default:
abort();
}
break;
case -1:
err(1, "db get `%s'", name);
break;
default:
abort();
break;
}
return xdb;
}
/*
* ng_reventry(): Recursively add all the netgroups to the group entry.
*/
static void
ng_reventry(DB *db, DB *udb, struct nentry *fe, char *name, size_t s,
StringList *ss)
{
DBT key, data;
struct nentry *e;
struct netgroup *ng;
char *p;
DB *xdb;
if (sl_find(ss, fe->n_name) != NULL) {
_ng_cycle(name, ss);
return;
}
sl_add(ss, fe->n_name);
for (e = fe->n_next; e != NULL; e = e->n_next)
switch (e->n_type) {
case _NG_GROUP:
if (!dups)
sl_delete(ss, fe->n_name, 0);
ng = e->n_group;
p = _ng_makekey(*((char **)(((char *) ng) + s)),
ng->ng_domain, e->n_size);
xdb = ng_insert(udb, p);
key.data = (u_char *)name;
key.size = strlen(name) + 1;
data.data = NULL;
data.size = 0;
switch ((xdb->put)(xdb, &key, &data, R_NOOVERWRITE)) {
case 0:
case 1:
break;
case -1:
err(1, "db put `%s'", name);
return;
default:
abort();
break;
}
free(p);
break;
case _NG_NAME:
key.data = (u_char *) e->n_name;
key.size = strlen(e->n_name) + 1;
switch ((db->get)(db, &key, &data, 0)) {
struct nentry *rfe;
case 0:
(void)memcpy(&rfe, data.data, sizeof(rfe));
ng_reventry(db, udb, rfe, name, s, ss);
break;
case 1:
break;
case -1:
err(1, "db get `%s'", e->n_name);
return;
default:
abort();
return;
}
break;
default:
abort();
break;
}
}
/*
* ng_reverse(): Reverse the database
*/
static DB *
ng_reverse(DB *db, size_t s)
{
int pos;
StringList *sl;
DBT key, data;
struct nentry *fe;
DB *udb = dbopen(NULL, O_RDWR | O_CREAT | O_EXCL, 0,
DB_HASH, NULL);
if (udb == NULL)
err(1, "dbopen");
for (pos = R_FIRST;; pos = R_NEXT)
switch ((db->seq)(db, &key, &data, pos)) {
case 0:
sl = sl_init();
(void)memcpy(&fe, data.data, sizeof(fe));
ng_reventry(db, udb, fe, (char *) key.data, s, sl);
sl_free(sl, 0);
break;
case 1:
return udb;
case -1:
err(1, "seq");
return udb;
}
return udb;
}
/*
* ng_print(): Pretty print a netgroup entry
*/
static void
ng_print(struct nentry *e, struct string *str)
{
char *ptr;
if (e->n_next == NULL) {
str_append(str, "", ' ');
return;
}
ptr = emalloc(e->n_size);
for (e = e->n_next; e != NULL; e = e->n_next) {
switch (e->n_type) {
case _NG_NAME:
(void)snprintf(ptr, e->n_size, "%s", e->n_name);
break;
case _NG_GROUP:
(void)snprintf(ptr, e->n_size, "(%s,%s,%s)",
NG_EMPTY(e->n_group->ng_host),
NG_EMPTY(e->n_group->ng_user),
NG_EMPTY(e->n_group->ng_domain));
break;
default:
errx(1, "Internal error: Bad netgroup type");
break;
}
str_append(str, ptr, ' ');
}
free(ptr);
}
/*
* ng_rprint(): Pretty print all reverse netgroup mappings in the given entry
*/
static void
ng_rprint(DB *db, struct string *str)
{
int pos;
DBT key, data;
for (pos = R_FIRST;; pos = R_NEXT)
switch ((db->seq)(db, &key, &data, pos)) {
case 0:
str_append(str, (char *)key.data, ',');
break;
case 1:
return;
default:
err(1, "seq");
break;
}
}
#ifdef DEBUG_NG
/*
* ng_dump(): Pretty print all netgroups in the given database
*/
static void
ng_dump(DB *db)
{
int pos;
DBT key, data;
struct nentry *e;
struct string buf;
for (pos = R_FIRST;; pos = R_NEXT)
switch ((db->seq)(db, &key, &data, pos)) {
case 0:
(void)memcpy(&e, data.data, sizeof(e));
str_init(&buf);
assert(e->n_type == _NG_NAME);
ng_print(e, &buf);
(void)fprintf(stderr, "%s\t%s\n", e->n_name,
buf.s_str ? buf.s_str : "");
str_free(&buf);
break;
case 1:
return;
default:
err(1, "seq");
return;
}
}
/*
* ng_rdump(): Pretty print all reverse mappings in the given database
*/
static void
ng_rdump(DB *db)
{
int pos;
DBT key, data;
DB *xdb;
struct string buf;
for (pos = R_FIRST;; pos = R_NEXT)
switch ((db->seq)(db, &key, &data, pos)) {
case 0:
(void)memcpy(&xdb, data.data, sizeof(xdb));
str_init(&buf);
ng_rprint(xdb, &buf);
(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(DB *odb, DB *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(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(void)
{
(void)fprintf(stderr, "Usage: %s [-D] [-o db] [<file>]\n",
getprogname());
exit(1);
}
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