/* $NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $ */
/*-
* Copyright (c) 2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $");
#include <stdio.h>
#ifdef HAVE_LIBUTIL_H
#include <libutil.h>
#endif
#ifdef HAVE_UTIL_H
#include <util.h>
#endif
#include <stdarg.h>
#include <limits.h>
#include <stdlib.h>
#include <inttypes.h>
#include <syslog.h>
#include <string.h>
#include <netinet/in.h>
#include <net/if.h>
#include "run.h"
#include "conf.h"
#include "internal.h"
#include "support.h"
extern char **environ;
static char *
run(const char *cmd, const char *name, ...)
{
const char *argv[20];
size_t i;
va_list ap;
FILE *fp;
char buf[10240], *res;
argv[0] = "control";
argv[1] = cmd;
argv[2] = name;
va_start(ap, name);
for (i = 3; i < __arraycount(argv) &&
(argv[i] = va_arg(ap, char *)) != NULL; i++)
continue;
va_end(ap);
if (debug) {
size_t z;
int r;
r = snprintf(buf, sizeof(buf), "run %s [", controlprog);
if (r == -1 || (z = (size_t)r) >= sizeof(buf))
z = sizeof(buf);
for (i = 0; argv[i]; i++) {
r = snprintf(buf + z, sizeof(buf) - z, "%s%s",
argv[i], argv[i + 1] ? " " : "");
if (r == -1 || (z += (size_t)r) >= sizeof(buf))
z = sizeof(buf);
}
(*lfun)(LOG_DEBUG, "%s]", buf);
}
fp = popenve(controlprog, __UNCONST(argv), environ, "r");
if (fp == NULL) {
(*lfun)(LOG_ERR, "popen %s failed (%m)", controlprog);
return NULL;
}
if (fgets(buf, sizeof(buf), fp) != NULL)
res = strdup(buf);
else
res = NULL;
pclose(fp);
if (debug)
(*lfun)(LOG_DEBUG, "%s returns %s", cmd, res);
return res;
}
void
run_flush(const struct conf *c)
{
free(run("flush", c->c_name, NULL));
}
int
run_change(const char *how, const struct conf *c, char *id, size_t len)
{
const char *prname;
char poname[64], adname[128], maskname[32], *rv;
size_t off;
switch (c->c_proto) {
case -1:
prname = "";
break;
case IPPROTO_TCP:
prname = "tcp";
break;
case IPPROTO_UDP:
prname = "udp";
break;
default:
(*lfun)(LOG_ERR, "%s: bad protocol %d", __func__, c->c_proto);
return -1;
}
if (c->c_port != -1)
snprintf(poname, sizeof(poname), "%d", c->c_port);
else
poname[0] = '\0';
snprintf(maskname, sizeof(maskname), "%d", c->c_lmask);
sockaddr_snprintf(adname, sizeof(adname), "%a", (const void *)&c->c_ss);
rv = run(how, c->c_name, prname, adname, maskname, poname, id, NULL);
if (rv == NULL)
return -1;
if (len != 0) {
rv[strcspn(rv, "\n")] = '\0';
off = strncmp(rv, "OK ", 3) == 0 ? 3 : 0;
strlcpy(id, rv + off, len);
}
free(rv);
return 0;
}
