/* $NetBSD: services_mkdb.c,v 1.14 2008/04/28 20:24:17 martin Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-NetBSD
*
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn and Christos Zoulas.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <assert.h>
#include <db.h>
#include <err.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libgen.h>
#include <ctype.h>
#include <errno.h>
#include <stringlist.h>
#include "extern.h"
static char tname[MAXPATHLEN];
#define PMASK 0xffff
#define PROTOMAX 6
static void add(DB *, StringList *, size_t, const char *, size_t *, int);
static StringList ***parseservices(const char *, StringList *);
static void cleanup(void);
static void store(DB *, DBT *, DBT *, int);
static void killproto(DBT *);
static char *getstring(const char *, size_t, char **, const char *);
static size_t getprotoindex(StringList *, const char *);
static const char *getprotostr(StringList *, size_t);
static const char *mkaliases(StringList *, char *, size_t);
static void usage(void);
HASHINFO hinfo = {
.bsize = 256,
.ffactor = 4,
.nelem = 32768,
.cachesize = 1024,
.hash = NULL,
.lorder = 0
};
int
main(int argc, char *argv[])
{
DB *db;
int ch;
const char *fname = _PATH_SERVICES;
const char *dbname = _PATH_SERVICES_DB;
int warndup = 1;
int unique = 0;
int otherflag = 0;
int byteorder = 0;
size_t cnt = 0;
StringList *sl, ***svc;
size_t port, proto;
char *dbname_dir, *dbname_dirbuf;
int dbname_dir_fd = -1;
setprogname(argv[0]);
while ((ch = getopt(argc, argv, "blo:qu")) != -1)
switch (ch) {
case 'b':
case 'l':
if (byteorder != 0)
usage();
byteorder = ch == 'b' ? 4321 : 1234;
break;
case 'q':
otherflag = 1;
warndup = 0;
break;
case 'o':
otherflag = 1;
dbname = optarg;
break;
case 'u':
unique++;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 1 || (unique && otherflag))
usage();
if (argc == 1)
fname = argv[0];
/* Set byte order. */
hinfo.lorder = byteorder;
if (unique)
uniq(fname);
svc = parseservices(fname, sl = sl_init());
if (atexit(cleanup))
err(1, "Cannot install exit handler");
(void)snprintf(tname, sizeof(tname), "%s.tmp", dbname);
db = dbopen(tname, O_RDWR | O_CREAT | O_EXCL,
(S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH), DB_HASH, &hinfo);
if (!db)
err(1, "Error opening temporary database `%s'", tname);
for (port = 0; port < PMASK + 1; port++) {
if (svc[port] == NULL)
continue;
for (proto = 0; proto < PROTOMAX; proto++) {
StringList *s;
if ((s = svc[port][proto]) == NULL)
continue;
add(db, s, port, getprotostr(sl, proto), &cnt, warndup);
}
free(svc[port]);
}
free(svc);
sl_free(sl, 1);
if ((db->close)(db))
err(1, "Error closing temporary database `%s'", tname);
/*
* Make sure file is safe on disk. To improve performance we will call
* fsync() to the directory where file lies
*/
if (rename(tname, dbname) == -1 ||
(dbname_dirbuf = strdup(dbname)) == NULL ||
(dbname_dir = dirname(dbname_dirbuf)) == NULL ||
(dbname_dir_fd = open(dbname_dir, O_RDONLY|O_DIRECTORY)) == -1 ||
fsync(dbname_dir_fd) != 0) {
if (dbname_dir_fd != -1)
close(dbname_dir_fd);
err(1, "Cannot rename `%s' to `%s'", tname, dbname);
}
if (dbname_dir_fd != -1)
close(dbname_dir_fd);
return 0;
}
static void
add(DB *db, StringList *sl, size_t port, const char *proto, size_t *cnt,
int warndup)
{
size_t i;
char keyb[BUFSIZ], datab[BUFSIZ], abuf[BUFSIZ];
DBT data, key;
key.data = keyb;
data.data = datab;
#ifdef DEBUG
(void)printf("add %s %zu %s [ ", sl->sl_str[0], port, proto);
for (i = 1; i < sl->sl_cur; i++)
(void)printf("%s ", sl->sl_str[i]);
(void)printf("]\n");
#endif
/* key `indirect key', data `full line' */
data.size = snprintf(datab, sizeof(datab), "%zu", (*cnt)++) + 1;
key.size = snprintf(keyb, sizeof(keyb), "%s %zu/%s %s",
sl->sl_str[0], port, proto, mkaliases(sl, abuf, sizeof(abuf))) + 1;
store(db, &data, &key, warndup);
/* key `\377port/proto', data = `indirect key' */
key.size = snprintf(keyb, sizeof(keyb), "\377%zu/%s",
port, proto) + 1;
store(db, &key, &data, warndup);
/* key `\377port', data = `indirect key' */
killproto(&key);
store(db, &key, &data, warndup);
/* add references for service and all aliases */
for (i = 0; i < sl->sl_cur; i++) {
/* key `\376service/proto', data = `indirect key' */
key.size = snprintf(keyb, sizeof(keyb), "\376%s/%s",
sl->sl_str[i], proto) + 1;
store(db, &key, &data, warndup);
/* key `\376service', data = `indirect key' */
killproto(&key);
store(db, &key, &data, warndup);
}
sl_free(sl, 1);
}
static StringList ***
parseservices(const char *fname, StringList *sl)
{
ssize_t len;
size_t linecap, line, pindex;
FILE *fp;
StringList ***svc, *s;
char *p, *ep;
if ((fp = fopen(fname, "r")) == NULL)
err(1, "Cannot open `%s'", fname);
line = linecap = 0;
if ((svc = calloc(PMASK + 1, sizeof(StringList **))) == NULL)
err(1, "Cannot allocate %zu bytes", (size_t)(PMASK + 1));
p = NULL;
while ((len = getline(&p, &linecap, fp)) != -1) {
char *name, *port, *proto, *aliases, *cp, *alias;
unsigned long pnum;
line++;
if (len == 0)
continue;
if (p[len - 1] == '\n')
p[len - 1] = '\0';
for (cp = p; *cp && isspace((unsigned char)*cp); cp++)
continue;
if (*cp == '\0' || *cp == '#')
continue;
if ((name = getstring(fname, line, &cp, "name")) == NULL)
continue;
if ((port = getstring(fname, line, &cp, "port")) == NULL)
continue;
if (cp) {
for (aliases = cp; *cp && *cp != '#'; cp++)
continue;
if (*cp)
*cp = '\0';
} else
aliases = NULL;
proto = strchr(port, '/');
if (proto == NULL || proto[1] == '\0') {
warnx("%s, %zu: no protocol found", fname, line);
continue;
}
*proto++ = '\0';
errno = 0;
pnum = strtoul(port, &ep, 0);
if (*port == '\0' || *ep != '\0') {
warnx("%s, %zu: invalid port `%s'", fname, line, port);
continue;
}
if ((errno == ERANGE && pnum == ULONG_MAX) || pnum > PMASK) {
warnx("%s, %zu: port too big `%s'", fname, line, port);
continue;
}
if (svc[pnum] == NULL) {
svc[pnum] = calloc(PROTOMAX, sizeof(StringList *));
if (svc[pnum] == NULL)
err(1, "Cannot allocate %zu bytes",
(size_t)PROTOMAX);
}
pindex = getprotoindex(sl, proto);
if (svc[pnum][pindex] == NULL)
s = svc[pnum][pindex] = sl_init();
else
s = svc[pnum][pindex];
/* build list of aliases */
if (sl_find(s, name) == NULL) {
char *p2;
if ((p2 = strdup(name)) == NULL)
err(1, "Cannot copy string");
(void)sl_add(s, p2);
}
if (aliases) {
while ((alias = strsep(&aliases, " \t")) != NULL) {
if (alias[0] == '\0')
continue;
if (sl_find(s, alias) == NULL) {
char *p2;
if ((p2 = strdup(alias)) == NULL)
err(1, "Cannot copy string");
(void)sl_add(s, p2);
}
}
}
}
(void)fclose(fp);
return svc;
}
/*
* cleanup(): Remove temporary files upon exit
*/
static void
cleanup(void)
{
if (tname[0])
(void)unlink(tname);
}
static char *
getstring(const char *fname, size_t line, char **cp, const char *tag)
{
char *str;
while ((str = strsep(cp, " \t")) != NULL && *str == '\0')
continue;
if (str == NULL)
warnx("%s, %zu: no %s found", fname, line, tag);
return str;
}
static void
killproto(DBT *key)
{
char *p, *d = key->data;
if ((p = strchr(d, '/')) == NULL)
abort();
*p++ = '\0';
key->size = p - d;
}
static void
store(DB *db, DBT *key, DBT *data, int warndup)
{
#ifdef DEBUG
int k = key->size - 1;
int d = data->size - 1;
(void)printf("store [%*.*s] [%*.*s]\n",
k, k, (char *)key->data + 1,
d, d, (char *)data->data + 1);
#endif
switch ((db->put)(db, key, data, R_NOOVERWRITE)) {
case 0:
break;
case 1:
if (warndup)
warnx("duplicate service `%s'",
&((char *)key->data)[1]);
break;
case -1:
err(1, "put");
break;
default:
abort();
break;
}
}
static size_t
getprotoindex(StringList *sl, const char *str)
{
size_t i;
char *p;
for (i= 0; i < sl->sl_cur; i++)
if (strcmp(sl->sl_str[i], str) == 0)
return i;
if (i == PROTOMAX)
errx(1, "Ran out of protocols adding `%s';"
" recompile with larger PROTOMAX", str);
if ((p = strdup(str)) == NULL)
err(1, "Cannot copy string");
(void)sl_add(sl, p);
return i;
}
static const char *
getprotostr(StringList *sl, size_t i)
{
assert(i < sl->sl_cur);
return sl->sl_str[i];
}
static const char *
mkaliases(StringList *sl, char *buf, size_t len)
{
size_t nc, i, pos;
buf[0] = 0;
for (i = 1, pos = 0; i < sl->sl_cur; i++) {
nc = strlcpy(buf + pos, sl->sl_str[i], len);
if (nc >= len)
goto out;
pos += nc;
len -= nc;
nc = strlcpy(buf + pos, " ", len);
if (nc >= len)
goto out;
pos += nc;
len -= nc;
}
return buf;
out:
warn("aliases for `%s' truncated", sl->sl_str[0]);
return buf;
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage:\t%s [-b | -l] [-q] [-o <db>] [<servicefile>]\n"
"\t%s -u [<servicefile>]\n", getprogname(), getprogname());
exit(1);
}
