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NetBSD/usr.sbin/services_mkdb/services_mkdb.c

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/* $NetBSD: services_mkdb.c,v 1.19 2017/01/10 21:04:06 christos Exp $ */
/*-
* 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>
#ifndef lint
__RCSID("$NetBSD: services_mkdb.c,v 1.19 2017/01/10 21:04:06 christos Exp $");
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <assert.h>
#include <err.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <ctype.h>
#include <errno.h>
#include <stringlist.h>
#include "extern.h"
static char tname[MAXPATHLEN];
#define PMASK 0xffff
#define PROTOMAX 6
static StringList ***parseservices(const char *, StringList *);
static void cleanup(void);
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 void usage(void) __dead;
int
main(int argc, char *argv[])
{
int ch;
const char *fname = _PATH_SERVICES;
const char *dbname = NULL;
int use_db = 0;
int warndup = 0;
int unique = 0;
int otherflag = 0;
size_t cnt = 0;
StringList *sl, ***svc;
size_t port, proto;
void (*addfn)(StringList *, size_t, const char *, size_t *, int);
int (*closefn)(void);
setprogname(argv[0]);
while ((ch = getopt(argc, argv, "o:quV:v")) != -1)
switch (ch) {
case 'o':
otherflag = 1;
dbname = optarg;
break;
case 'q':
otherflag = 1;
warndup = 0;
break;
case 'u':
unique++;
break;
case 'V':
if (strcmp(optarg, "db") == 0)
use_db = 1;
else if (strcmp(optarg, "cdb") == 0)
use_db = 0;
else
usage();
break;
case 'v':
otherflag = 1;
warndup = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 1 || (unique && otherflag))
usage();
if (argc == 1)
fname = argv[0];
if (unique)
uniq(fname);
if (dbname == NULL)
dbname = use_db ? _PATH_SERVICES_DB : _PATH_SERVICES_CDB;
svc = parseservices(fname, sl = sl_init());
if (atexit(cleanup))
err(1, "Cannot install exit handler");
(void)snprintf(tname, sizeof(tname), "%s.tmp", dbname);
if (use_db) {
if (db_open(tname))
err(1, "Error opening temporary database `%s'", tname);
addfn = db_add;
closefn = db_close;
} else {
if (cdb_open(tname))
err(1, "Error opening temporary database `%s'", tname);
addfn = cdb_add;
closefn = cdb_close;
}
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;
(addfn)(s, port, getprotostr(sl, proto), &cnt, warndup);
}
free(svc[port]);
}
free(svc);
sl_free(sl, 1);
if ((closefn)())
err(1, "Error writing temporary database `%s'", tname);
if (rename(tname, dbname) == -1)
err(1, "Cannot rename `%s' to `%s'", tname, dbname);
return 0;
}
static StringList ***
parseservices(const char *fname, StringList *sl)
{
size_t len, line, pindex;
FILE *fp;
StringList ***svc, *s;
char *p, *ep;
if ((fp = fopen(fname, "r")) == NULL)
err(1, "Cannot open `%s'", fname);
line = 0;
svc = ecalloc(PMASK + 1, sizeof(StringList **));
/* XXX: change NULL to "\0\0#" when fparseln fixed */
for (; (p = fparseln(fp, &len, &line, NULL, 0)) != NULL; free(p)) {
char *name, *port, *proto, *aliases, *cp, *alias;
unsigned long pnum;
if (len == 0)
continue;
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] = ecalloc(PROTOMAX, sizeof(StringList *));
pindex = getprotoindex(sl, proto);
if (svc[pnum][pindex] == NULL)
s = svc[pnum][pindex] = sl_init();
else
s = svc[pnum][pindex];
if (strlen(name) > 255) {
warnx("%s, %zu: invalid name too long `%s'", fname,
line, name);
continue;
}
/* build list of aliases */
if (sl_find(s, name) == NULL)
(void)sl_add(s, estrdup(name));
if (aliases) {
while ((alias = strsep(&aliases, " \t")) != NULL) {
if (alias[0] == '\0')
continue;
if (strlen(alias) > 255) {
warnx("%s, %zu: alias name too long `%s'",
fname, line, alias);
continue;
}
if (sl_find(s, alias) == NULL)
(void)sl_add(s, estrdup(alias));
}
}
}
(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 size_t
getprotoindex(StringList *sl, const char *str)
{
size_t i;
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);
(void)sl_add(sl, estrdup(str));
return i;
}
static const char *
getprotostr(StringList *sl, size_t i)
{
assert(i < sl->sl_cur);
return sl->sl_str[i];
}
static void
usage(void)
{
(void)fprintf(stderr, "Usage:\t%s [-q] [-o <db>] [-V cdb|db] [<servicefile>]\n"
"\t%s -u [<servicefile>]\n", getprogname(), getprogname());
exit(1);
}
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