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env.c
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env.c
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/* $NetBSD: env.c,v 1.6 2008/07/02 07:44:14 dyoung Exp $ */
/*-
* Copyright (c) 2008 David Young. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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: env.c,v 1.6 2008/07/02 07:44:14 dyoung Exp $");
#endif /* not lint */
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <util.h>
#include <net/if.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include "env.h"
#include "util.h"
prop_dictionary_t
prop_dictionary_augment(prop_dictionary_t bottom, prop_dictionary_t top)
{
prop_object_iterator_t i;
prop_dictionary_t d;
prop_object_t ko, o;
prop_dictionary_keysym_t k;
const char *key;
d = prop_dictionary_copy_mutable(bottom);
i = prop_dictionary_iterator(top);
while ((ko = prop_object_iterator_next(i)) != NULL) {
k = (prop_dictionary_keysym_t)ko;
key = prop_dictionary_keysym_cstring_nocopy(k);
o = prop_dictionary_get_keysym(top, k);
if (o == NULL || !prop_dictionary_set(d, key, o)) {
prop_object_release((prop_object_t)d);
d = NULL;
break;
}
}
prop_object_iterator_release(i);
prop_dictionary_make_immutable(d);
return d;
}
int
getifflags(prop_dictionary_t env, prop_dictionary_t oenv,
unsigned short *flagsp)
{
struct ifreq ifr;
const char *ifname;
uint64_t ifflags;
int s;
if (prop_dictionary_get_uint64(env, "ifflags", &ifflags)) {
*flagsp = (unsigned short)ifflags;
return 0;
}
if ((s = getsock(AF_UNSPEC)) == -1)
return -1;
if ((ifname = getifname(env)) == NULL)
return -1;
memset(&ifr, 0, sizeof(ifr));
estrlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1)
return -1;
*flagsp = (unsigned short)ifr.ifr_flags;
prop_dictionary_set_uint64(oenv, "ifflags",
(unsigned short)ifr.ifr_flags);
return 0;
}
const char *
getifinfo(prop_dictionary_t env, prop_dictionary_t oenv, unsigned short *flagsp)
{
if (getifflags(env, oenv, flagsp) == -1)
return NULL;
return getifname(env);
}
const char *
getifname(prop_dictionary_t env)
{
const char *s;
return prop_dictionary_get_cstring_nocopy(env, "if", &s) ? s : NULL;
}
ssize_t
getargdata(prop_dictionary_t env, const char *key, uint8_t *buf, size_t buflen)
{
prop_data_t data;
size_t datalen;
data = (prop_data_t)prop_dictionary_get(env, key);
if (data == NULL) {
errno = ENOENT;
return -1;
}
datalen = prop_data_size(data);
if (datalen > buflen) {
errno = ENAMETOOLONG;
return -1;
}
memset(buf, 0, buflen);
memcpy(buf, prop_data_data_nocopy(data), datalen);
return datalen;
}
ssize_t
getargstr(prop_dictionary_t env, const char *key, char *buf, size_t buflen)
{
prop_data_t data;
size_t datalen;
data = (prop_data_t)prop_dictionary_get(env, key);
if (data == NULL) {
errno = ENOENT;
return -1;
}
datalen = prop_data_size(data);
if (datalen >= buflen) {
errno = ENAMETOOLONG;
return -1;
}
memset(buf, 0, buflen);
memcpy(buf, prop_data_data_nocopy(data), datalen);
return datalen;
}
int
getaf(prop_dictionary_t env)
{
int64_t af;
if (!prop_dictionary_get_int64(env, "af", &af)) {
errno = ENOENT;
return -1;
}
return (int)af;
}